pgstatfuncs.c File Reference

#include "postgres.h"
#include "access/htup_details.h"
#include "access/xlog.h"
#include "catalog/pg_authid.h"
#include "catalog/pg_type.h"
#include "common/ip.h"
#include "funcapi.h"
#include "miscadmin.h"
#include "pgstat.h"
#include "postmaster/bgworker_internals.h"
#include "postmaster/postmaster.h"
#include "replication/slot.h"
#include "storage/proc.h"
#include "storage/procarray.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/inet.h"
#include "utils/timestamp.h"

Include dependency graph for pgstatfuncs.c:

Go to the source code of this file.

Macros
#define	UINT32_ACCESS_ONCE(var)   ((uint32)(*((volatile uint32 *)&(var))))
#define	HAS_PGSTAT_PERMISSIONS(role)   (is_member_of_role(GetUserId(), ROLE_PG_READ_ALL_STATS) || has_privs_of_role(GetUserId(), role))
#define	PG_STAT_GET_PROGRESS_COLS   PGSTAT_NUM_PROGRESS_PARAM + 3
#define	PG_STAT_GET_ACTIVITY_COLS   30
#define	PG_STAT_GET_WAL_COLS   9
#define	PG_STAT_GET_SLRU_COLS   9
#define	PG_STAT_GET_REPLICATION_SLOT_COLS   10

Functions
Datum	pg_stat_get_numscans (PG_FUNCTION_ARGS)
Datum	pg_stat_get_tuples_returned (PG_FUNCTION_ARGS)
Datum	pg_stat_get_tuples_fetched (PG_FUNCTION_ARGS)
Datum	pg_stat_get_tuples_inserted (PG_FUNCTION_ARGS)
Datum	pg_stat_get_tuples_updated (PG_FUNCTION_ARGS)
Datum	pg_stat_get_tuples_deleted (PG_FUNCTION_ARGS)
Datum	pg_stat_get_tuples_hot_updated (PG_FUNCTION_ARGS)
Datum	pg_stat_get_live_tuples (PG_FUNCTION_ARGS)
Datum	pg_stat_get_dead_tuples (PG_FUNCTION_ARGS)
Datum	pg_stat_get_mod_since_analyze (PG_FUNCTION_ARGS)
Datum	pg_stat_get_ins_since_vacuum (PG_FUNCTION_ARGS)
Datum	pg_stat_get_blocks_fetched (PG_FUNCTION_ARGS)
Datum	pg_stat_get_blocks_hit (PG_FUNCTION_ARGS)
Datum	pg_stat_get_last_vacuum_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_last_autovacuum_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_last_analyze_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_last_autoanalyze_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_vacuum_count (PG_FUNCTION_ARGS)
Datum	pg_stat_get_autovacuum_count (PG_FUNCTION_ARGS)
Datum	pg_stat_get_analyze_count (PG_FUNCTION_ARGS)
Datum	pg_stat_get_autoanalyze_count (PG_FUNCTION_ARGS)
Datum	pg_stat_get_function_calls (PG_FUNCTION_ARGS)
Datum	pg_stat_get_function_total_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_function_self_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_backend_idset (PG_FUNCTION_ARGS)
Datum	pg_stat_get_progress_info (PG_FUNCTION_ARGS)
Datum	pg_stat_get_activity (PG_FUNCTION_ARGS)
Datum	pg_backend_pid (PG_FUNCTION_ARGS)
Datum	pg_stat_get_backend_pid (PG_FUNCTION_ARGS)
Datum	pg_stat_get_backend_dbid (PG_FUNCTION_ARGS)
Datum	pg_stat_get_backend_userid (PG_FUNCTION_ARGS)
Datum	pg_stat_get_backend_activity (PG_FUNCTION_ARGS)
Datum	pg_stat_get_backend_wait_event_type (PG_FUNCTION_ARGS)
Datum	pg_stat_get_backend_wait_event (PG_FUNCTION_ARGS)
Datum	pg_stat_get_backend_activity_start (PG_FUNCTION_ARGS)
Datum	pg_stat_get_backend_xact_start (PG_FUNCTION_ARGS)
Datum	pg_stat_get_backend_start (PG_FUNCTION_ARGS)
Datum	pg_stat_get_backend_client_addr (PG_FUNCTION_ARGS)
Datum	pg_stat_get_backend_client_port (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_numbackends (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_xact_commit (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_xact_rollback (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_blocks_fetched (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_blocks_hit (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_tuples_returned (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_tuples_fetched (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_tuples_inserted (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_tuples_updated (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_tuples_deleted (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_stat_reset_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_temp_files (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_temp_bytes (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_conflict_tablespace (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_conflict_lock (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_conflict_snapshot (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_conflict_bufferpin (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_conflict_startup_deadlock (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_conflict_all (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_deadlocks (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_checksum_failures (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_checksum_last_failure (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_blk_read_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_blk_write_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_session_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_active_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_idle_in_transaction_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_sessions (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_sessions_abandoned (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_sessions_fatal (PG_FUNCTION_ARGS)
Datum	pg_stat_get_db_sessions_killed (PG_FUNCTION_ARGS)
Datum	pg_stat_get_bgwriter_timed_checkpoints (PG_FUNCTION_ARGS)
Datum	pg_stat_get_bgwriter_requested_checkpoints (PG_FUNCTION_ARGS)
Datum	pg_stat_get_bgwriter_buf_written_checkpoints (PG_FUNCTION_ARGS)
Datum	pg_stat_get_bgwriter_buf_written_clean (PG_FUNCTION_ARGS)
Datum	pg_stat_get_bgwriter_maxwritten_clean (PG_FUNCTION_ARGS)
Datum	pg_stat_get_checkpoint_write_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_checkpoint_sync_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_bgwriter_stat_reset_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_buf_written_backend (PG_FUNCTION_ARGS)
Datum	pg_stat_get_buf_fsync_backend (PG_FUNCTION_ARGS)
Datum	pg_stat_get_buf_alloc (PG_FUNCTION_ARGS)
Datum	pg_stat_get_wal (PG_FUNCTION_ARGS)
Datum	pg_stat_get_slru (PG_FUNCTION_ARGS)
Datum	pg_stat_get_xact_numscans (PG_FUNCTION_ARGS)
Datum	pg_stat_get_xact_tuples_returned (PG_FUNCTION_ARGS)
Datum	pg_stat_get_xact_tuples_fetched (PG_FUNCTION_ARGS)
Datum	pg_stat_get_xact_tuples_inserted (PG_FUNCTION_ARGS)
Datum	pg_stat_get_xact_tuples_updated (PG_FUNCTION_ARGS)
Datum	pg_stat_get_xact_tuples_deleted (PG_FUNCTION_ARGS)
Datum	pg_stat_get_xact_tuples_hot_updated (PG_FUNCTION_ARGS)
Datum	pg_stat_get_xact_blocks_fetched (PG_FUNCTION_ARGS)
Datum	pg_stat_get_xact_blocks_hit (PG_FUNCTION_ARGS)
Datum	pg_stat_get_xact_function_calls (PG_FUNCTION_ARGS)
Datum	pg_stat_get_xact_function_total_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_xact_function_self_time (PG_FUNCTION_ARGS)
Datum	pg_stat_get_snapshot_timestamp (PG_FUNCTION_ARGS)
Datum	pg_stat_clear_snapshot (PG_FUNCTION_ARGS)
Datum	pg_stat_reset (PG_FUNCTION_ARGS)
Datum	pg_stat_reset_shared (PG_FUNCTION_ARGS)
Datum	pg_stat_reset_single_table_counters (PG_FUNCTION_ARGS)
Datum	pg_stat_reset_single_function_counters (PG_FUNCTION_ARGS)
Datum	pg_stat_reset_slru (PG_FUNCTION_ARGS)
Datum	pg_stat_reset_replication_slot (PG_FUNCTION_ARGS)
Datum	pg_stat_get_archiver (PG_FUNCTION_ARGS)
Datum	pg_stat_get_replication_slot (PG_FUNCTION_ARGS)

Variables
PgStat_MsgBgWriter	bgwriterStats

Macro Definition Documentation

HAS_PGSTAT_PERMISSIONS

#define HAS_PGSTAT_PERMISSIONS

(

role

)

(is_member_of_role(GetUserId(), ROLE_PG_READ_ALL_STATS) || has_privs_of_role(GetUserId(), role))

Definition at line 37 of file pgstatfuncs.c.

Referenced by pg_stat_get_activity(), pg_stat_get_backend_activity(), pg_stat_get_backend_activity_start(), pg_stat_get_backend_client_addr(), pg_stat_get_backend_client_port(), pg_stat_get_backend_start(), pg_stat_get_backend_wait_event(), pg_stat_get_backend_wait_event_type(), pg_stat_get_backend_xact_start(), and pg_stat_get_progress_info().

PG_STAT_GET_ACTIVITY_COLS

#define PG_STAT_GET_ACTIVITY_COLS   30

Referenced by pg_stat_get_activity().

PG_STAT_GET_PROGRESS_COLS

#define PG_STAT_GET_PROGRESS_COLS   PGSTAT_NUM_PROGRESS_PARAM + 3

Referenced by pg_stat_get_progress_info().

PG_STAT_GET_REPLICATION_SLOT_COLS

#define PG_STAT_GET_REPLICATION_SLOT_COLS   10

Referenced by pg_stat_get_replication_slot().

PG_STAT_GET_SLRU_COLS

#define PG_STAT_GET_SLRU_COLS   9

Referenced by pg_stat_get_slru().

PG_STAT_GET_WAL_COLS

#define PG_STAT_GET_WAL_COLS   9

Referenced by pg_stat_get_wal().

UINT32_ACCESS_ONCE

#define UINT32_ACCESS_ONCE

(

var

)

((uint32)(*((volatile uint32 *)&(var))))

Definition at line 35 of file pgstatfuncs.c.

Referenced by pg_stat_get_activity().

Function Documentation

pg_backend_pid()

Datum pg_backend_pid

(

PG_FUNCTION_ARGS

)

Definition at line 967 of file pgstatfuncs.c.

References MyProcPid, and PG_RETURN_INT32.

{
    PG_RETURN_INT32(MyProcPid);
}

pg_stat_clear_snapshot()

Datum pg_stat_clear_snapshot

(

PG_FUNCTION_ARGS

)

Definition at line 2141 of file pgstatfuncs.c.

References PG_RETURN_VOID, and pgstat_clear_snapshot().

{
    pgstat_clear_snapshot();

    PG_RETURN_VOID();
}

pg_stat_get_activity()

Datum pg_stat_get_activity

(

PG_FUNCTION_ARGS

)

Definition at line 571 of file pgstatfuncs.c.

References SockAddr::addr, ReturnSetInfo::allowedModes, AuxiliaryPidGetProc(), B_BACKEND, B_BG_WORKER, B_WAL_SENDER, LocalPgBackendStatus::backend_xid, LocalPgBackendStatus::backend_xmin, BackendPidGetProc(), LocalPgBackendStatus::backendStatus, BoolGetDatum, clean_ipv6_addr(), CStringGetDatum, CStringGetTextDatum, DirectFunctionCall1, DirectFunctionCall3, ReturnSetInfo::econtext, ExprContext::ecxt_per_query_memory, elog, ereport, errcode(), errmsg(), ERROR, get_call_result_type(), GetBackendTypeDesc(), GetBackgroundWorkerTypeByPid(), PgBackendGSSStatus::gss_auth, PgBackendGSSStatus::gss_enc, PgBackendGSSStatus::gss_princ, HAS_PGSTAT_PERMISSIONS, i, inet_in(), Int32GetDatum, InvalidOid, IsA, lengthof, PGPROC::lockGroupLeader, MemoryContextSwitchTo(), MemSet, NI_MAXHOST, NI_MAXSERV, NI_NUMERICHOST, NI_NUMERICSERV, numeric_in(), ObjectIdGetDatum, pfree(), PG_ARGISNULL, PG_GETARG_INT32, pg_getnameinfo_all(), PG_STAT_GET_ACTIVITY_COLS, pgstat_clip_activity(), pgstat_fetch_stat_local_beentry(), pgstat_fetch_stat_numbackends(), pgstat_get_wait_event(), pgstat_get_wait_event_type(), PGPROC::pid, ReturnSetInfo::returnMode, SockAddr::salen, ReturnSetInfo::setDesc, ReturnSetInfo::setResult, SFRM_Materialize, PgBackendSSLStatus::ssl_bits, PgBackendSSLStatus::ssl_cipher, PgBackendSSLStatus::ssl_client_dn, PgBackendSSLStatus::ssl_client_serial, PgBackendSSLStatus::ssl_issuer_dn, PgBackendSSLStatus::ssl_version, PgBackendStatus::st_activity_raw, PgBackendStatus::st_activity_start_timestamp, PgBackendStatus::st_appname, PgBackendStatus::st_backendType, PgBackendStatus::st_clientaddr, PgBackendStatus::st_clienthostname, PgBackendStatus::st_databaseid, PgBackendStatus::st_gss, PgBackendStatus::st_gssstatus, PgBackendStatus::st_proc_start_timestamp, PgBackendStatus::st_procpid, PgBackendStatus::st_query_id, PgBackendStatus::st_ssl, PgBackendStatus::st_sslstatus, PgBackendStatus::st_state, PgBackendStatus::st_state_start_timestamp, PgBackendStatus::st_userid, PgBackendStatus::st_xact_start_timestamp, STATE_DISABLED, STATE_FASTPATH, STATE_IDLE, STATE_IDLEINTRANSACTION, STATE_IDLEINTRANSACTION_ABORTED, STATE_RUNNING, STATE_UNDEFINED, TimestampTzGetDatum, TransactionIdGetDatum, TransactionIdIsValid, tuplestore_begin_heap(), tuplestore_donestoring, tuplestore_putvalues(), TYPEFUNC_COMPOSITE, UINT32_ACCESS_ONCE, UInt64GetDatum, values, PGPROC::wait_event_info, and work_mem.

{
#define PG_STAT_GET_ACTIVITY_COLS   30
    int         num_backends = pgstat_fetch_stat_numbackends();
    int         curr_backend;
    int         pid = PG_ARGISNULL(0) ? -1 : PG_GETARG_INT32(0);
    ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
    TupleDesc   tupdesc;
    Tuplestorestate *tupstore;
    MemoryContext per_query_ctx;
    MemoryContext oldcontext;

    /* check to see if caller supports us returning a tuplestore */
    if (rsinfo == NULL || !IsA(rsinfo, ReturnSetInfo))
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("set-valued function called in context that cannot accept a set")));
    if (!(rsinfo->allowedModes & SFRM_Materialize))
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("materialize mode required, but it is not allowed in this context")));

    /* Build a tuple descriptor for our result type */
    if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
        elog(ERROR, "return type must be a row type");

    per_query_ctx = rsinfo->econtext->ecxt_per_query_memory;
    oldcontext = MemoryContextSwitchTo(per_query_ctx);

    tupstore = tuplestore_begin_heap(true, false, work_mem);
    rsinfo->returnMode = SFRM_Materialize;
    rsinfo->setResult = tupstore;
    rsinfo->setDesc = tupdesc;

    MemoryContextSwitchTo(oldcontext);

    /* 1-based index */
    for (curr_backend = 1; curr_backend <= num_backends; curr_backend++)
    {
        /* for each row */
        Datum       values[PG_STAT_GET_ACTIVITY_COLS];
        bool        nulls[PG_STAT_GET_ACTIVITY_COLS];
        LocalPgBackendStatus *local_beentry;
        PgBackendStatus *beentry;
        PGPROC     *proc;
        const char *wait_event_type = NULL;
        const char *wait_event = NULL;

        MemSet(values, 0, sizeof(values));
        MemSet(nulls, 0, sizeof(nulls));

        /* Get the next one in the list */
        local_beentry = pgstat_fetch_stat_local_beentry(curr_backend);
        if (!local_beentry)
        {
            int         i;

            /* Ignore missing entries if looking for specific PID */
            if (pid != -1)
                continue;

            for (i = 0; i < lengthof(nulls); i++)
                nulls[i] = true;

            nulls[5] = false;
            values[5] = CStringGetTextDatum("<backend information not available>");

            tuplestore_putvalues(tupstore, tupdesc, values, nulls);
            continue;
        }

        beentry = &local_beentry->backendStatus;

        /* If looking for specific PID, ignore all the others */
        if (pid != -1 && beentry->st_procpid != pid)
            continue;

        /* Values available to all callers */
        if (beentry->st_databaseid != InvalidOid)
            values[0] = ObjectIdGetDatum(beentry->st_databaseid);
        else
            nulls[0] = true;

        values[1] = Int32GetDatum(beentry->st_procpid);

        if (beentry->st_userid != InvalidOid)
            values[2] = ObjectIdGetDatum(beentry->st_userid);
        else
            nulls[2] = true;

        if (beentry->st_appname)
            values[3] = CStringGetTextDatum(beentry->st_appname);
        else
            nulls[3] = true;

        if (TransactionIdIsValid(local_beentry->backend_xid))
            values[15] = TransactionIdGetDatum(local_beentry->backend_xid);
        else
            nulls[15] = true;

        if (TransactionIdIsValid(local_beentry->backend_xmin))
            values[16] = TransactionIdGetDatum(local_beentry->backend_xmin);
        else
            nulls[16] = true;

        /* Values only available to role member or pg_read_all_stats */
        if (HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
        {
            SockAddr    zero_clientaddr;
            char       *clipped_activity;

            switch (beentry->st_state)
            {
                case STATE_IDLE:
                    values[4] = CStringGetTextDatum("idle");
                    break;
                case STATE_RUNNING:
                    values[4] = CStringGetTextDatum("active");
                    break;
                case STATE_IDLEINTRANSACTION:
                    values[4] = CStringGetTextDatum("idle in transaction");
                    break;
                case STATE_FASTPATH:
                    values[4] = CStringGetTextDatum("fastpath function call");
                    break;
                case STATE_IDLEINTRANSACTION_ABORTED:
                    values[4] = CStringGetTextDatum("idle in transaction (aborted)");
                    break;
                case STATE_DISABLED:
                    values[4] = CStringGetTextDatum("disabled");
                    break;
                case STATE_UNDEFINED:
                    nulls[4] = true;
                    break;
            }

            clipped_activity = pgstat_clip_activity(beentry->st_activity_raw);
            values[5] = CStringGetTextDatum(clipped_activity);
            pfree(clipped_activity);

            /* leader_pid */
            nulls[28] = true;

            proc = BackendPidGetProc(beentry->st_procpid);

            if (proc == NULL && (beentry->st_backendType != B_BACKEND))
            {
                /*
                 * For an auxiliary process, retrieve process info from
                 * AuxiliaryProcs stored in shared-memory.
                 */
                proc = AuxiliaryPidGetProc(beentry->st_procpid);
            }

            /*
             * If a PGPROC entry was retrieved, display wait events and lock
             * group leader information if any.  To avoid extra overhead, no
             * extra lock is being held, so there is no guarantee of
             * consistency across multiple rows.
             */
            if (proc != NULL)
            {
                uint32      raw_wait_event;
                PGPROC     *leader;

                raw_wait_event = UINT32_ACCESS_ONCE(proc->wait_event_info);
                wait_event_type = pgstat_get_wait_event_type(raw_wait_event);
                wait_event = pgstat_get_wait_event(raw_wait_event);

                leader = proc->lockGroupLeader;

                /*
                 * Show the leader only for active parallel workers.  This
                 * leaves the field as NULL for the leader of a parallel
                 * group.
                 */
                if (leader && leader->pid != beentry->st_procpid)
                {
                    values[28] = Int32GetDatum(leader->pid);
                    nulls[28] = false;
                }
            }

            if (wait_event_type)
                values[6] = CStringGetTextDatum(wait_event_type);
            else
                nulls[6] = true;

            if (wait_event)
                values[7] = CStringGetTextDatum(wait_event);
            else
                nulls[7] = true;

            /*
             * Don't expose transaction time for walsenders; it confuses
             * monitoring, particularly because we don't keep the time up-to-
             * date.
             */
            if (beentry->st_xact_start_timestamp != 0 &&
                beentry->st_backendType != B_WAL_SENDER)
                values[8] = TimestampTzGetDatum(beentry->st_xact_start_timestamp);
            else
                nulls[8] = true;

            if (beentry->st_activity_start_timestamp != 0)
                values[9] = TimestampTzGetDatum(beentry->st_activity_start_timestamp);
            else
                nulls[9] = true;

            if (beentry->st_proc_start_timestamp != 0)
                values[10] = TimestampTzGetDatum(beentry->st_proc_start_timestamp);
            else
                nulls[10] = true;

            if (beentry->st_state_start_timestamp != 0)
                values[11] = TimestampTzGetDatum(beentry->st_state_start_timestamp);
            else
                nulls[11] = true;

            /* A zeroed client addr means we don't know */
            memset(&zero_clientaddr, 0, sizeof(zero_clientaddr));
            if (memcmp(&(beentry->st_clientaddr), &zero_clientaddr,
                       sizeof(zero_clientaddr)) == 0)
            {
                nulls[12] = true;
                nulls[13] = true;
                nulls[14] = true;
            }
            else
            {
                if (beentry->st_clientaddr.addr.ss_family == AF_INET
#ifdef HAVE_IPV6
                    || beentry->st_clientaddr.addr.ss_family == AF_INET6
#endif
                    )
                {
                    char        remote_host[NI_MAXHOST];
                    char        remote_port[NI_MAXSERV];
                    int         ret;

                    remote_host[0] = '\0';
                    remote_port[0] = '\0';
                    ret = pg_getnameinfo_all(&beentry->st_clientaddr.addr,
                                             beentry->st_clientaddr.salen,
                                             remote_host, sizeof(remote_host),
                                             remote_port, sizeof(remote_port),
                                             NI_NUMERICHOST | NI_NUMERICSERV);
                    if (ret == 0)
                    {
                        clean_ipv6_addr(beentry->st_clientaddr.addr.ss_family, remote_host);
                        values[12] = DirectFunctionCall1(inet_in,
                                                         CStringGetDatum(remote_host));
                        if (beentry->st_clienthostname &&
                            beentry->st_clienthostname[0])
                            values[13] = CStringGetTextDatum(beentry->st_clienthostname);
                        else
                            nulls[13] = true;
                        values[14] = Int32GetDatum(atoi(remote_port));
                    }
                    else
                    {
                        nulls[12] = true;
                        nulls[13] = true;
                        nulls[14] = true;
                    }
                }
                else if (beentry->st_clientaddr.addr.ss_family == AF_UNIX)
                {
                    /*
                     * Unix sockets always reports NULL for host and -1 for
                     * port, so it's possible to tell the difference to
                     * connections we have no permissions to view, or with
                     * errors.
                     */
                    nulls[12] = true;
                    nulls[13] = true;
                    values[14] = Int32GetDatum(-1);
                }
                else
                {
                    /* Unknown address type, should never happen */
                    nulls[12] = true;
                    nulls[13] = true;
                    nulls[14] = true;
                }
            }
            /* Add backend type */
            if (beentry->st_backendType == B_BG_WORKER)
            {
                const char *bgw_type;

                bgw_type = GetBackgroundWorkerTypeByPid(beentry->st_procpid);
                if (bgw_type)
                    values[17] = CStringGetTextDatum(bgw_type);
                else
                    nulls[17] = true;
            }
            else
                values[17] =
                    CStringGetTextDatum(GetBackendTypeDesc(beentry->st_backendType));

            /* SSL information */
            if (beentry->st_ssl)
            {
                values[18] = BoolGetDatum(true);    /* ssl */
                values[19] = CStringGetTextDatum(beentry->st_sslstatus->ssl_version);
                values[20] = CStringGetTextDatum(beentry->st_sslstatus->ssl_cipher);
                values[21] = Int32GetDatum(beentry->st_sslstatus->ssl_bits);

                if (beentry->st_sslstatus->ssl_client_dn[0])
                    values[22] = CStringGetTextDatum(beentry->st_sslstatus->ssl_client_dn);
                else
                    nulls[22] = true;

                if (beentry->st_sslstatus->ssl_client_serial[0])
                    values[23] = DirectFunctionCall3(numeric_in,
                                                     CStringGetDatum(beentry->st_sslstatus->ssl_client_serial),
                                                     ObjectIdGetDatum(InvalidOid),
                                                     Int32GetDatum(-1));
                else
                    nulls[23] = true;

                if (beentry->st_sslstatus->ssl_issuer_dn[0])
                    values[24] = CStringGetTextDatum(beentry->st_sslstatus->ssl_issuer_dn);
                else
                    nulls[24] = true;
            }
            else
            {
                values[18] = BoolGetDatum(false);   /* ssl */
                nulls[19] = nulls[20] = nulls[21] = nulls[22] = nulls[23] = nulls[24] = true;
            }

            /* GSSAPI information */
            if (beentry->st_gss)
            {
                values[25] = BoolGetDatum(beentry->st_gssstatus->gss_auth); /* gss_auth */
                values[26] = CStringGetTextDatum(beentry->st_gssstatus->gss_princ);
                values[27] = BoolGetDatum(beentry->st_gssstatus->gss_enc);  /* GSS Encryption in use */
            }
            else
            {
                values[25] = BoolGetDatum(false);   /* gss_auth */
                nulls[26] = true;   /* No GSS principal */
                values[27] = BoolGetDatum(false);   /* GSS Encryption not in
                                                     * use */
            }
            if (beentry->st_query_id == 0)
                nulls[29] = true;
            else
                values[29] = UInt64GetDatum(beentry->st_query_id);
        }
        else
        {
            /* No permissions to view data about this session */
            values[5] = CStringGetTextDatum("<insufficient privilege>");
            nulls[4] = true;
            nulls[6] = true;
            nulls[7] = true;
            nulls[8] = true;
            nulls[9] = true;
            nulls[10] = true;
            nulls[11] = true;
            nulls[12] = true;
            nulls[13] = true;
            nulls[14] = true;
            nulls[17] = true;
            nulls[18] = true;
            nulls[19] = true;
            nulls[20] = true;
            nulls[21] = true;
            nulls[22] = true;
            nulls[23] = true;
            nulls[24] = true;
            nulls[25] = true;
            nulls[26] = true;
            nulls[27] = true;
            nulls[28] = true;
            nulls[29] = true;
        }

        tuplestore_putvalues(tupstore, tupdesc, values, nulls);

        /* If only a single backend was requested, and we found it, break. */
        if (pid != -1)
            break;
    }

    /* clean up and return the tuplestore */
    tuplestore_donestoring(tupstore);

    return (Datum) 0;
}

pg_stat_get_analyze_count()

Datum pg_stat_get_analyze_count

(

PG_FUNCTION_ARGS

)

Definition at line 352 of file pgstatfuncs.c.

References PgStat_StatTabEntry::analyze_count, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_tabentry().

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->analyze_count);

    PG_RETURN_INT64(result);
}

pg_stat_get_archiver()

Datum pg_stat_get_archiver

(

PG_FUNCTION_ARGS

)

Definition at line 2244 of file pgstatfuncs.c.

References PgStat_ArchiverStats::archived_count, BlessTupleDesc(), CreateTemplateTupleDesc(), CStringGetTextDatum, PgStat_ArchiverStats::failed_count, heap_form_tuple(), HeapTupleGetDatum, Int64GetDatum(), PgStat_ArchiverStats::last_archived_timestamp, PgStat_ArchiverStats::last_archived_wal, PgStat_ArchiverStats::last_failed_timestamp, PgStat_ArchiverStats::last_failed_wal, MemSet, PG_RETURN_DATUM, pgstat_fetch_stat_archiver(), PgStat_ArchiverStats::stat_reset_timestamp, TimestampTzGetDatum, TupleDescInitEntry(), and values.

{
    TupleDesc   tupdesc;
    Datum       values[7];
    bool        nulls[7];
    PgStat_ArchiverStats *archiver_stats;

    /* Initialise values and NULL flags arrays */
    MemSet(values, 0, sizeof(values));
    MemSet(nulls, 0, sizeof(nulls));

    /* Initialise attributes information in the tuple descriptor */
    tupdesc = CreateTemplateTupleDesc(7);
    TupleDescInitEntry(tupdesc, (AttrNumber) 1, "archived_count",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 2, "last_archived_wal",
                       TEXTOID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 3, "last_archived_time",
                       TIMESTAMPTZOID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 4, "failed_count",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 5, "last_failed_wal",
                       TEXTOID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 6, "last_failed_time",
                       TIMESTAMPTZOID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 7, "stats_reset",
                       TIMESTAMPTZOID, -1, 0);

    BlessTupleDesc(tupdesc);

    /* Get statistics about the archiver process */
    archiver_stats = pgstat_fetch_stat_archiver();

    /* Fill values and NULLs */
    values[0] = Int64GetDatum(archiver_stats->archived_count);
    if (*(archiver_stats->last_archived_wal) == '\0')
        nulls[1] = true;
    else
        values[1] = CStringGetTextDatum(archiver_stats->last_archived_wal);

    if (archiver_stats->last_archived_timestamp == 0)
        nulls[2] = true;
    else
        values[2] = TimestampTzGetDatum(archiver_stats->last_archived_timestamp);

    values[3] = Int64GetDatum(archiver_stats->failed_count);
    if (*(archiver_stats->last_failed_wal) == '\0')
        nulls[4] = true;
    else
        values[4] = CStringGetTextDatum(archiver_stats->last_failed_wal);

    if (archiver_stats->last_failed_timestamp == 0)
        nulls[5] = true;
    else
        values[5] = TimestampTzGetDatum(archiver_stats->last_failed_timestamp);

    if (archiver_stats->stat_reset_timestamp == 0)
        nulls[6] = true;
    else
        values[6] = TimestampTzGetDatum(archiver_stats->stat_reset_timestamp);

    /* Returns the record as Datum */
    PG_RETURN_DATUM(HeapTupleGetDatum(heap_form_tuple(tupdesc, values, nulls)));
}

pg_stat_get_autoanalyze_count()

Datum pg_stat_get_autoanalyze_count

(

PG_FUNCTION_ARGS

)

Definition at line 367 of file pgstatfuncs.c.

References PgStat_StatTabEntry::autovac_analyze_count, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_tabentry().

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->autovac_analyze_count);

    PG_RETURN_INT64(result);
}

pg_stat_get_autovacuum_count()

Datum pg_stat_get_autovacuum_count

(

PG_FUNCTION_ARGS

)

Definition at line 337 of file pgstatfuncs.c.

References PgStat_StatTabEntry::autovac_vacuum_count, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_tabentry().

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->autovac_vacuum_count);

    PG_RETURN_INT64(result);
}

pg_stat_get_backend_activity()

Datum pg_stat_get_backend_activity

(

PG_FUNCTION_ARGS

)

Definition at line 1013 of file pgstatfuncs.c.

References cstring_to_text(), HAS_PGSTAT_PERMISSIONS, pfree(), PG_GETARG_INT32, PG_RETURN_TEXT_P, pgstat_clip_activity(), pgstat_fetch_stat_beentry(), PgBackendStatus::st_activity_raw, and PgBackendStatus::st_userid.

{
    int32       beid = PG_GETARG_INT32(0);
    PgBackendStatus *beentry;
    const char *activity;
    char       *clipped_activity;
    text       *ret;

    if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
        activity = "<backend information not available>";
    else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
        activity = "<insufficient privilege>";
    else if (*(beentry->st_activity_raw) == '\0')
        activity = "<command string not enabled>";
    else
        activity = beentry->st_activity_raw;

    clipped_activity = pgstat_clip_activity(activity);
    ret = cstring_to_text(activity);
    pfree(clipped_activity);

    PG_RETURN_TEXT_P(ret);
}

pg_stat_get_backend_activity_start()

Datum pg_stat_get_backend_activity_start

(

PG_FUNCTION_ARGS

)

Definition at line 1081 of file pgstatfuncs.c.

References HAS_PGSTAT_PERMISSIONS, PG_GETARG_INT32, PG_RETURN_NULL, PG_RETURN_TIMESTAMPTZ, pgstat_fetch_stat_beentry(), PgBackendStatus::st_activity_start_timestamp, and PgBackendStatus::st_userid.

{
    int32       beid = PG_GETARG_INT32(0);
    TimestampTz result;
    PgBackendStatus *beentry;

    if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
        PG_RETURN_NULL();

    else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
        PG_RETURN_NULL();

    result = beentry->st_activity_start_timestamp;

    /*
     * No time recorded for start of current query -- this is the case if the
     * user hasn't enabled query-level stats collection.
     */
    if (result == 0)
        PG_RETURN_NULL();

    PG_RETURN_TIMESTAMPTZ(result);
}

pg_stat_get_backend_client_addr()

Datum pg_stat_get_backend_client_addr

(

PG_FUNCTION_ARGS

)

Definition at line 1151 of file pgstatfuncs.c.

References SockAddr::addr, clean_ipv6_addr(), CStringGetDatum, DirectFunctionCall1, HAS_PGSTAT_PERMISSIONS, inet_in(), NI_MAXHOST, NI_NUMERICHOST, NI_NUMERICSERV, PG_GETARG_INT32, pg_getnameinfo_all(), PG_RETURN_INET_P, PG_RETURN_NULL, pgstat_fetch_stat_beentry(), SockAddr::salen, PgBackendStatus::st_clientaddr, and PgBackendStatus::st_userid.

{
    int32       beid = PG_GETARG_INT32(0);
    PgBackendStatus *beentry;
    SockAddr    zero_clientaddr;
    char        remote_host[NI_MAXHOST];
    int         ret;

    if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
        PG_RETURN_NULL();

    else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
        PG_RETURN_NULL();

    /* A zeroed client addr means we don't know */
    memset(&zero_clientaddr, 0, sizeof(zero_clientaddr));
    if (memcmp(&(beentry->st_clientaddr), &zero_clientaddr,
               sizeof(zero_clientaddr)) == 0)
        PG_RETURN_NULL();

    switch (beentry->st_clientaddr.addr.ss_family)
    {
        case AF_INET:
#ifdef HAVE_IPV6
        case AF_INET6:
#endif
            break;
        default:
            PG_RETURN_NULL();
    }

    remote_host[0] = '\0';
    ret = pg_getnameinfo_all(&beentry->st_clientaddr.addr,
                             beentry->st_clientaddr.salen,
                             remote_host, sizeof(remote_host),
                             NULL, 0,
                             NI_NUMERICHOST | NI_NUMERICSERV);
    if (ret != 0)
        PG_RETURN_NULL();

    clean_ipv6_addr(beentry->st_clientaddr.addr.ss_family, remote_host);

    PG_RETURN_INET_P(DirectFunctionCall1(inet_in,
                                         CStringGetDatum(remote_host)));
}

pg_stat_get_backend_client_port()

Datum pg_stat_get_backend_client_port

(

PG_FUNCTION_ARGS

)

Definition at line 1198 of file pgstatfuncs.c.

References SockAddr::addr, CStringGetDatum, DirectFunctionCall1, HAS_PGSTAT_PERMISSIONS, int4in(), NI_MAXSERV, NI_NUMERICHOST, NI_NUMERICSERV, PG_GETARG_INT32, pg_getnameinfo_all(), PG_RETURN_DATUM, PG_RETURN_INT32, PG_RETURN_NULL, pgstat_fetch_stat_beentry(), SockAddr::salen, PgBackendStatus::st_clientaddr, and PgBackendStatus::st_userid.

{
    int32       beid = PG_GETARG_INT32(0);
    PgBackendStatus *beentry;
    SockAddr    zero_clientaddr;
    char        remote_port[NI_MAXSERV];
    int         ret;

    if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
        PG_RETURN_NULL();

    else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
        PG_RETURN_NULL();

    /* A zeroed client addr means we don't know */
    memset(&zero_clientaddr, 0, sizeof(zero_clientaddr));
    if (memcmp(&(beentry->st_clientaddr), &zero_clientaddr,
               sizeof(zero_clientaddr)) == 0)
        PG_RETURN_NULL();

    switch (beentry->st_clientaddr.addr.ss_family)
    {
        case AF_INET:
#ifdef HAVE_IPV6
        case AF_INET6:
#endif
            break;
        case AF_UNIX:
            PG_RETURN_INT32(-1);
        default:
            PG_RETURN_NULL();
    }

    remote_port[0] = '\0';
    ret = pg_getnameinfo_all(&beentry->st_clientaddr.addr,
                             beentry->st_clientaddr.salen,
                             NULL, 0,
                             remote_port, sizeof(remote_port),
                             NI_NUMERICHOST | NI_NUMERICSERV);
    if (ret != 0)
        PG_RETURN_NULL();

    PG_RETURN_DATUM(DirectFunctionCall1(int4in,
                                        CStringGetDatum(remote_port)));
}

pg_stat_get_backend_dbid()

Datum pg_stat_get_backend_dbid

(

PG_FUNCTION_ARGS

)

Definition at line 987 of file pgstatfuncs.c.

References PG_GETARG_INT32, PG_RETURN_NULL, PG_RETURN_OID, pgstat_fetch_stat_beentry(), and PgBackendStatus::st_databaseid.

{
    int32       beid = PG_GETARG_INT32(0);
    PgBackendStatus *beentry;

    if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
        PG_RETURN_NULL();

    PG_RETURN_OID(beentry->st_databaseid);
}

pg_stat_get_backend_idset()

Datum pg_stat_get_backend_idset

(

PG_FUNCTION_ARGS

)

Definition at line 417 of file pgstatfuncs.c.

References Int32GetDatum, MemoryContextAlloc(), FuncCallContext::multi_call_memory_ctx, pgstat_fetch_stat_numbackends(), SRF_FIRSTCALL_INIT, SRF_IS_FIRSTCALL, SRF_PERCALL_SETUP, SRF_RETURN_DONE, SRF_RETURN_NEXT, and FuncCallContext::user_fctx.

{
    FuncCallContext *funcctx;
    int        *fctx;
    int32       result;

    /* stuff done only on the first call of the function */
    if (SRF_IS_FIRSTCALL())
    {
        /* create a function context for cross-call persistence */
        funcctx = SRF_FIRSTCALL_INIT();

        fctx = MemoryContextAlloc(funcctx->multi_call_memory_ctx,
                                  2 * sizeof(int));
        funcctx->user_fctx = fctx;

        fctx[0] = 0;
        fctx[1] = pgstat_fetch_stat_numbackends();
    }

    /* stuff done on every call of the function */
    funcctx = SRF_PERCALL_SETUP();
    fctx = funcctx->user_fctx;

    fctx[0] += 1;
    result = fctx[0];

    if (result <= fctx[1])
    {
        /* do when there is more left to send */
        SRF_RETURN_NEXT(funcctx, Int32GetDatum(result));
    }
    else
    {
        /* do when there is no more left */
        SRF_RETURN_DONE(funcctx);
    }
}

pg_stat_get_backend_pid()

Datum pg_stat_get_backend_pid

(

PG_FUNCTION_ARGS

)

Definition at line 974 of file pgstatfuncs.c.

References PG_GETARG_INT32, PG_RETURN_INT32, PG_RETURN_NULL, pgstat_fetch_stat_beentry(), and PgBackendStatus::st_procpid.

{
    int32       beid = PG_GETARG_INT32(0);
    PgBackendStatus *beentry;

    if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
        PG_RETURN_NULL();

    PG_RETURN_INT32(beentry->st_procpid);
}

pg_stat_get_backend_start()

Datum pg_stat_get_backend_start

(

PG_FUNCTION_ARGS

)

Definition at line 1129 of file pgstatfuncs.c.

References HAS_PGSTAT_PERMISSIONS, PG_GETARG_INT32, PG_RETURN_NULL, PG_RETURN_TIMESTAMPTZ, pgstat_fetch_stat_beentry(), PgBackendStatus::st_proc_start_timestamp, and PgBackendStatus::st_userid.

{
    int32       beid = PG_GETARG_INT32(0);
    TimestampTz result;
    PgBackendStatus *beentry;

    if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
        PG_RETURN_NULL();

    else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
        PG_RETURN_NULL();

    result = beentry->st_proc_start_timestamp;

    if (result == 0)            /* probably can't happen? */
        PG_RETURN_NULL();

    PG_RETURN_TIMESTAMPTZ(result);
}

pg_stat_get_backend_userid()

Datum pg_stat_get_backend_userid

(

PG_FUNCTION_ARGS

)

Definition at line 1000 of file pgstatfuncs.c.

References PG_GETARG_INT32, PG_RETURN_NULL, PG_RETURN_OID, pgstat_fetch_stat_beentry(), and PgBackendStatus::st_userid.

{
    int32       beid = PG_GETARG_INT32(0);
    PgBackendStatus *beentry;

    if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
        PG_RETURN_NULL();

    PG_RETURN_OID(beentry->st_userid);
}

pg_stat_get_backend_wait_event()

Datum pg_stat_get_backend_wait_event

(

PG_FUNCTION_ARGS

)

Definition at line 1059 of file pgstatfuncs.c.

References BackendPidGetProc(), cstring_to_text(), HAS_PGSTAT_PERMISSIONS, PG_GETARG_INT32, PG_RETURN_NULL, PG_RETURN_TEXT_P, pgstat_fetch_stat_beentry(), pgstat_get_wait_event(), PgBackendStatus::st_procpid, PgBackendStatus::st_userid, and PGPROC::wait_event_info.

{
    int32       beid = PG_GETARG_INT32(0);
    PgBackendStatus *beentry;
    PGPROC     *proc;
    const char *wait_event = NULL;

    if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
        wait_event = "<backend information not available>";
    else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
        wait_event = "<insufficient privilege>";
    else if ((proc = BackendPidGetProc(beentry->st_procpid)) != NULL)
        wait_event = pgstat_get_wait_event(proc->wait_event_info);

    if (!wait_event)
        PG_RETURN_NULL();

    PG_RETURN_TEXT_P(cstring_to_text(wait_event));
}

pg_stat_get_backend_wait_event_type()

Datum pg_stat_get_backend_wait_event_type

(

PG_FUNCTION_ARGS

)

Definition at line 1038 of file pgstatfuncs.c.

References BackendPidGetProc(), cstring_to_text(), HAS_PGSTAT_PERMISSIONS, PG_GETARG_INT32, PG_RETURN_NULL, PG_RETURN_TEXT_P, pgstat_fetch_stat_beentry(), pgstat_get_wait_event_type(), PgBackendStatus::st_procpid, PgBackendStatus::st_userid, and PGPROC::wait_event_info.

{
    int32       beid = PG_GETARG_INT32(0);
    PgBackendStatus *beentry;
    PGPROC     *proc;
    const char *wait_event_type = NULL;

    if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
        wait_event_type = "<backend information not available>";
    else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
        wait_event_type = "<insufficient privilege>";
    else if ((proc = BackendPidGetProc(beentry->st_procpid)) != NULL)
        wait_event_type = pgstat_get_wait_event_type(proc->wait_event_info);

    if (!wait_event_type)
        PG_RETURN_NULL();

    PG_RETURN_TEXT_P(cstring_to_text(wait_event_type));
}

pg_stat_get_backend_xact_start()

Datum pg_stat_get_backend_xact_start

(

PG_FUNCTION_ARGS

)

Definition at line 1107 of file pgstatfuncs.c.

References HAS_PGSTAT_PERMISSIONS, PG_GETARG_INT32, PG_RETURN_NULL, PG_RETURN_TIMESTAMPTZ, pgstat_fetch_stat_beentry(), PgBackendStatus::st_userid, and PgBackendStatus::st_xact_start_timestamp.

{
    int32       beid = PG_GETARG_INT32(0);
    TimestampTz result;
    PgBackendStatus *beentry;

    if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
        PG_RETURN_NULL();

    else if (!HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
        PG_RETURN_NULL();

    result = beentry->st_xact_start_timestamp;

    if (result == 0)            /* not in a transaction */
        PG_RETURN_NULL();

    PG_RETURN_TIMESTAMPTZ(result);
}

pg_stat_get_bgwriter_buf_written_checkpoints()

Datum pg_stat_get_bgwriter_buf_written_checkpoints

(

PG_FUNCTION_ARGS

)

Definition at line 1745 of file pgstatfuncs.c.

References PG_RETURN_INT64, and pgstat_fetch_global().

{
    PG_RETURN_INT64(pgstat_fetch_global()->buf_written_checkpoints);
}

pg_stat_get_bgwriter_buf_written_clean()

Datum pg_stat_get_bgwriter_buf_written_clean

(

PG_FUNCTION_ARGS

)

Definition at line 1751 of file pgstatfuncs.c.

References PG_RETURN_INT64, and pgstat_fetch_global().

{
    PG_RETURN_INT64(pgstat_fetch_global()->buf_written_clean);
}

pg_stat_get_bgwriter_maxwritten_clean()

Datum pg_stat_get_bgwriter_maxwritten_clean

(

PG_FUNCTION_ARGS

)

Definition at line 1757 of file pgstatfuncs.c.

References PG_RETURN_INT64, and pgstat_fetch_global().

{
    PG_RETURN_INT64(pgstat_fetch_global()->maxwritten_clean);
}

pg_stat_get_bgwriter_requested_checkpoints()

Datum pg_stat_get_bgwriter_requested_checkpoints

(

PG_FUNCTION_ARGS

)

Definition at line 1739 of file pgstatfuncs.c.

References PG_RETURN_INT64, and pgstat_fetch_global().

{
    PG_RETURN_INT64(pgstat_fetch_global()->requested_checkpoints);
}

pg_stat_get_bgwriter_stat_reset_time()

Datum pg_stat_get_bgwriter_stat_reset_time

(

PG_FUNCTION_ARGS

)

Definition at line 1777 of file pgstatfuncs.c.

References PG_RETURN_TIMESTAMPTZ, and pgstat_fetch_global().

{
    PG_RETURN_TIMESTAMPTZ(pgstat_fetch_global()->stat_reset_timestamp);
}

pg_stat_get_bgwriter_timed_checkpoints()

Datum pg_stat_get_bgwriter_timed_checkpoints

(

PG_FUNCTION_ARGS

)

Definition at line 1733 of file pgstatfuncs.c.

References PG_RETURN_INT64, and pgstat_fetch_global().

{
    PG_RETURN_INT64(pgstat_fetch_global()->timed_checkpoints);
}

pg_stat_get_blocks_fetched()

Datum pg_stat_get_blocks_fetched

(

PG_FUNCTION_ARGS

)

Definition at line 219 of file pgstatfuncs.c.

References PgStat_StatTabEntry::blocks_fetched, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_tabentry().

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->blocks_fetched);

    PG_RETURN_INT64(result);
}

pg_stat_get_blocks_hit()

Datum pg_stat_get_blocks_hit

(

PG_FUNCTION_ARGS

)

Definition at line 235 of file pgstatfuncs.c.

References PgStat_StatTabEntry::blocks_hit, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_tabentry().

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->blocks_hit);

    PG_RETURN_INT64(result);
}

pg_stat_get_buf_alloc()

Datum pg_stat_get_buf_alloc

(

PG_FUNCTION_ARGS

)

Definition at line 1795 of file pgstatfuncs.c.

References PG_RETURN_INT64, and pgstat_fetch_global().

{
    PG_RETURN_INT64(pgstat_fetch_global()->buf_alloc);
}

pg_stat_get_buf_fsync_backend()

Datum pg_stat_get_buf_fsync_backend

(

PG_FUNCTION_ARGS

)

Definition at line 1789 of file pgstatfuncs.c.

References PG_RETURN_INT64, and pgstat_fetch_global().

{
    PG_RETURN_INT64(pgstat_fetch_global()->buf_fsync_backend);
}

pg_stat_get_buf_written_backend()

Datum pg_stat_get_buf_written_backend

(

PG_FUNCTION_ARGS

)

Definition at line 1783 of file pgstatfuncs.c.

References PG_RETURN_INT64, and pgstat_fetch_global().

{
    PG_RETURN_INT64(pgstat_fetch_global()->buf_written_backend);
}

pg_stat_get_checkpoint_sync_time()

Datum pg_stat_get_checkpoint_sync_time

(

PG_FUNCTION_ARGS

)

Definition at line 1770 of file pgstatfuncs.c.

References PG_RETURN_FLOAT8, and pgstat_fetch_global().

{
    /* time is already in msec, just convert to double for presentation */
    PG_RETURN_FLOAT8((double) pgstat_fetch_global()->checkpoint_sync_time);
}

pg_stat_get_checkpoint_write_time()

Datum pg_stat_get_checkpoint_write_time

(

PG_FUNCTION_ARGS

)

Definition at line 1763 of file pgstatfuncs.c.

References PG_RETURN_FLOAT8, and pgstat_fetch_global().

{
    /* time is already in msec, just convert to double for presentation */
    PG_RETURN_FLOAT8((double) pgstat_fetch_global()->checkpoint_write_time);
}

pg_stat_get_db_active_time()

Datum pg_stat_get_db_active_time

(

PG_FUNCTION_ARGS

)

Definition at line 1653 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_FLOAT8, pgstat_fetch_stat_dbentry(), and PgStat_StatDBEntry::total_active_time.

{
    Oid         dbid = PG_GETARG_OID(0);
    double      result = 0.0;
    PgStat_StatDBEntry *dbentry;

    /* convert counter from microsec to millisec for display */
    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) != NULL)
        result = ((double) dbentry->total_active_time) / 1000.0;

    PG_RETURN_FLOAT8(result);
}

pg_stat_get_db_blk_read_time()

Datum pg_stat_get_db_blk_read_time

(

PG_FUNCTION_ARGS

)

Definition at line 1607 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_block_read_time, PG_GETARG_OID, PG_RETURN_FLOAT8, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    double      result;
    PgStat_StatDBEntry *dbentry;

    /* convert counter from microsec to millisec for display */
    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = ((double) dbentry->n_block_read_time) / 1000.0;

    PG_RETURN_FLOAT8(result);
}

pg_stat_get_db_blk_write_time()

Datum pg_stat_get_db_blk_write_time

(

PG_FUNCTION_ARGS

)

Definition at line 1623 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_block_write_time, PG_GETARG_OID, PG_RETURN_FLOAT8, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    double      result;
    PgStat_StatDBEntry *dbentry;

    /* convert counter from microsec to millisec for display */
    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = ((double) dbentry->n_block_write_time) / 1000.0;

    PG_RETURN_FLOAT8(result);
}

pg_stat_get_db_blocks_fetched()

Datum pg_stat_get_db_blocks_fetched

(

PG_FUNCTION_ARGS

)

Definition at line 1299 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_blocks_fetched, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_blocks_fetched);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_blocks_hit()

Datum pg_stat_get_db_blocks_hit

(

PG_FUNCTION_ARGS

)

Definition at line 1315 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_blocks_hit, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_blocks_hit);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_checksum_failures()

Datum pg_stat_get_db_checksum_failures

(

PG_FUNCTION_ARGS

)

Definition at line 1568 of file pgstatfuncs.c.

References DataChecksumsEnabled(), PgStat_StatDBEntry::n_checksum_failures, PG_GETARG_OID, PG_RETURN_INT64, PG_RETURN_NULL, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if (!DataChecksumsEnabled())
        PG_RETURN_NULL();

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_checksum_failures);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_checksum_last_failure()

Datum pg_stat_get_db_checksum_last_failure

(

PG_FUNCTION_ARGS

)

Definition at line 1586 of file pgstatfuncs.c.

References DataChecksumsEnabled(), PgStat_StatDBEntry::last_checksum_failure, PG_GETARG_OID, PG_RETURN_NULL, PG_RETURN_TIMESTAMPTZ, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    TimestampTz result;
    PgStat_StatDBEntry *dbentry;

    if (!DataChecksumsEnabled())
        PG_RETURN_NULL();

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = dbentry->last_checksum_failure;

    if (result == 0)
        PG_RETURN_NULL();
    else
        PG_RETURN_TIMESTAMPTZ(result);
}

pg_stat_get_db_conflict_all()

Datum pg_stat_get_db_conflict_all

(

PG_FUNCTION_ARGS

)

Definition at line 1534 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_conflict_bufferpin, PgStat_StatDBEntry::n_conflict_lock, PgStat_StatDBEntry::n_conflict_snapshot, PgStat_StatDBEntry::n_conflict_startup_deadlock, PgStat_StatDBEntry::n_conflict_tablespace, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_conflict_tablespace +
                          dbentry->n_conflict_lock +
                          dbentry->n_conflict_snapshot +
                          dbentry->n_conflict_bufferpin +
                          dbentry->n_conflict_startup_deadlock);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_conflict_bufferpin()

Datum pg_stat_get_db_conflict_bufferpin

(

PG_FUNCTION_ARGS

)

Definition at line 1504 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_conflict_bufferpin, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_conflict_bufferpin);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_conflict_lock()

Datum pg_stat_get_db_conflict_lock

(

PG_FUNCTION_ARGS

)

Definition at line 1474 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_conflict_lock, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_conflict_lock);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_conflict_snapshot()

Datum pg_stat_get_db_conflict_snapshot

(

PG_FUNCTION_ARGS

)

Definition at line 1489 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_conflict_snapshot, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_conflict_snapshot);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_conflict_startup_deadlock()

Datum pg_stat_get_db_conflict_startup_deadlock

(

PG_FUNCTION_ARGS

)

Definition at line 1519 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_conflict_startup_deadlock, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_conflict_startup_deadlock);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_conflict_tablespace()

Datum pg_stat_get_db_conflict_tablespace

(

PG_FUNCTION_ARGS

)

Definition at line 1459 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_conflict_tablespace, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_conflict_tablespace);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_deadlocks()

Datum pg_stat_get_db_deadlocks

(

PG_FUNCTION_ARGS

)

Definition at line 1553 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_deadlocks, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_deadlocks);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_idle_in_transaction_time()

Datum pg_stat_get_db_idle_in_transaction_time

(

PG_FUNCTION_ARGS

)

Definition at line 1667 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_FLOAT8, pgstat_fetch_stat_dbentry(), and PgStat_StatDBEntry::total_idle_in_xact_time.

{
    Oid         dbid = PG_GETARG_OID(0);
    double      result = 0.0;
    PgStat_StatDBEntry *dbentry;

    /* convert counter from microsec to millisec for display */
    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) != NULL)
        result = ((double) dbentry->total_idle_in_xact_time) / 1000.0;

    PG_RETURN_FLOAT8(result);
}

pg_stat_get_db_numbackends()

Datum pg_stat_get_db_numbackends

(

PG_FUNCTION_ARGS

)

Definition at line 1246 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_INT32, pgstat_fetch_stat_beentry(), pgstat_fetch_stat_numbackends(), and PgBackendStatus::st_databaseid.

{
    Oid         dbid = PG_GETARG_OID(0);
    int32       result;
    int         tot_backends = pgstat_fetch_stat_numbackends();
    int         beid;

    result = 0;
    for (beid = 1; beid <= tot_backends; beid++)
    {
        PgBackendStatus *beentry = pgstat_fetch_stat_beentry(beid);

        if (beentry && beentry->st_databaseid == dbid)
            result++;
    }

    PG_RETURN_INT32(result);
}

pg_stat_get_db_session_time()

Datum pg_stat_get_db_session_time

(

PG_FUNCTION_ARGS

)

Definition at line 1639 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_FLOAT8, pgstat_fetch_stat_dbentry(), and PgStat_StatDBEntry::total_session_time.

{
    Oid         dbid = PG_GETARG_OID(0);
    double      result = 0.0;
    PgStat_StatDBEntry *dbentry;

    /* convert counter from microsec to millisec for display */
    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) != NULL)
        result = ((double) dbentry->total_session_time) / 1000.0;

    PG_RETURN_FLOAT8(result);
}

pg_stat_get_db_sessions()

Datum pg_stat_get_db_sessions

(

PG_FUNCTION_ARGS

)

Definition at line 1681 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_sessions, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result = 0;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) != NULL)
        result = (int64) (dbentry->n_sessions);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_sessions_abandoned()

Datum pg_stat_get_db_sessions_abandoned

(

PG_FUNCTION_ARGS

)

Definition at line 1694 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_sessions_abandoned, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result = 0;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) != NULL)
        result = (int64) (dbentry->n_sessions_abandoned);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_sessions_fatal()

Datum pg_stat_get_db_sessions_fatal

(

PG_FUNCTION_ARGS

)

Definition at line 1707 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_sessions_fatal, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result = 0;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) != NULL)
        result = (int64) (dbentry->n_sessions_fatal);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_sessions_killed()

Datum pg_stat_get_db_sessions_killed

(

PG_FUNCTION_ARGS

)

Definition at line 1720 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_sessions_killed, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result = 0;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) != NULL)
        result = (int64) (dbentry->n_sessions_killed);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_stat_reset_time()

Datum pg_stat_get_db_stat_reset_time

(

PG_FUNCTION_ARGS

)

Definition at line 1410 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_NULL, PG_RETURN_TIMESTAMPTZ, pgstat_fetch_stat_dbentry(), and PgStat_StatDBEntry::stat_reset_timestamp.

{
    Oid         dbid = PG_GETARG_OID(0);
    TimestampTz result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = dbentry->stat_reset_timestamp;

    if (result == 0)
        PG_RETURN_NULL();
    else
        PG_RETURN_TIMESTAMPTZ(result);
}

pg_stat_get_db_temp_bytes()

Datum pg_stat_get_db_temp_bytes

(

PG_FUNCTION_ARGS

)

Definition at line 1444 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_temp_bytes, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = dbentry->n_temp_bytes;

    PG_RETURN_INT64(result);
}

pg_stat_get_db_temp_files()

Datum pg_stat_get_db_temp_files

(

PG_FUNCTION_ARGS

)

Definition at line 1428 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_temp_files, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = dbentry->n_temp_files;

    PG_RETURN_INT64(result);
}

pg_stat_get_db_tuples_deleted()

Datum pg_stat_get_db_tuples_deleted

(

PG_FUNCTION_ARGS

)

Definition at line 1395 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_tuples_deleted, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_tuples_deleted);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_tuples_fetched()

Datum pg_stat_get_db_tuples_fetched

(

PG_FUNCTION_ARGS

)

Definition at line 1347 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_tuples_fetched, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_tuples_fetched);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_tuples_inserted()

Datum pg_stat_get_db_tuples_inserted

(

PG_FUNCTION_ARGS

)

Definition at line 1363 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_tuples_inserted, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_tuples_inserted);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_tuples_returned()

Datum pg_stat_get_db_tuples_returned

(

PG_FUNCTION_ARGS

)

Definition at line 1331 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_tuples_returned, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_tuples_returned);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_tuples_updated()

Datum pg_stat_get_db_tuples_updated

(

PG_FUNCTION_ARGS

)

Definition at line 1379 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_tuples_updated, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_tuples_updated);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_xact_commit()

Datum pg_stat_get_db_xact_commit

(

PG_FUNCTION_ARGS

)

Definition at line 1267 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_xact_commit, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_xact_commit);

    PG_RETURN_INT64(result);
}

pg_stat_get_db_xact_rollback()

Datum pg_stat_get_db_xact_rollback

(

PG_FUNCTION_ARGS

)

Definition at line 1283 of file pgstatfuncs.c.

References PgStat_StatDBEntry::n_xact_rollback, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_dbentry().

{
    Oid         dbid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatDBEntry *dbentry;

    if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
        result = 0;
    else
        result = (int64) (dbentry->n_xact_rollback);

    PG_RETURN_INT64(result);
}

pg_stat_get_dead_tuples()

Datum pg_stat_get_dead_tuples

(

PG_FUNCTION_ARGS

)

Definition at line 171 of file pgstatfuncs.c.

References PgStat_StatTabEntry::n_dead_tuples, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_tabentry().

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->n_dead_tuples);

    PG_RETURN_INT64(result);
}

pg_stat_get_function_calls()

Datum pg_stat_get_function_calls

(

PG_FUNCTION_ARGS

)

Definition at line 382 of file pgstatfuncs.c.

References PgStat_StatFuncEntry::f_numcalls, PG_GETARG_OID, PG_RETURN_INT64, PG_RETURN_NULL, and pgstat_fetch_stat_funcentry().

{
    Oid         funcid = PG_GETARG_OID(0);
    PgStat_StatFuncEntry *funcentry;

    if ((funcentry = pgstat_fetch_stat_funcentry(funcid)) == NULL)
        PG_RETURN_NULL();
    PG_RETURN_INT64(funcentry->f_numcalls);
}

pg_stat_get_function_self_time()

Datum pg_stat_get_function_self_time

(

PG_FUNCTION_ARGS

)

Definition at line 405 of file pgstatfuncs.c.

References PgStat_StatFuncEntry::f_self_time, PG_GETARG_OID, PG_RETURN_FLOAT8, PG_RETURN_NULL, and pgstat_fetch_stat_funcentry().

{
    Oid         funcid = PG_GETARG_OID(0);
    PgStat_StatFuncEntry *funcentry;

    if ((funcentry = pgstat_fetch_stat_funcentry(funcid)) == NULL)
        PG_RETURN_NULL();
    /* convert counter from microsec to millisec for display */
    PG_RETURN_FLOAT8(((double) funcentry->f_self_time) / 1000.0);
}

pg_stat_get_function_total_time()

Datum pg_stat_get_function_total_time

(

PG_FUNCTION_ARGS

)

Definition at line 393 of file pgstatfuncs.c.

References PgStat_StatFuncEntry::f_total_time, PG_GETARG_OID, PG_RETURN_FLOAT8, PG_RETURN_NULL, and pgstat_fetch_stat_funcentry().

{
    Oid         funcid = PG_GETARG_OID(0);
    PgStat_StatFuncEntry *funcentry;

    if ((funcentry = pgstat_fetch_stat_funcentry(funcid)) == NULL)
        PG_RETURN_NULL();
    /* convert counter from microsec to millisec for display */
    PG_RETURN_FLOAT8(((double) funcentry->f_total_time) / 1000.0);
}

pg_stat_get_ins_since_vacuum()

Datum pg_stat_get_ins_since_vacuum

(

PG_FUNCTION_ARGS

)

Definition at line 203 of file pgstatfuncs.c.

References PgStat_StatTabEntry::inserts_since_vacuum, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_tabentry().

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->inserts_since_vacuum);

    PG_RETURN_INT64(result);
}

pg_stat_get_last_analyze_time()

Datum pg_stat_get_last_analyze_time

(

PG_FUNCTION_ARGS

)

Definition at line 286 of file pgstatfuncs.c.

References PgStat_StatTabEntry::analyze_timestamp, PG_GETARG_OID, PG_RETURN_NULL, PG_RETURN_TIMESTAMPTZ, and pgstat_fetch_stat_tabentry().

{
    Oid         relid = PG_GETARG_OID(0);
    TimestampTz result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = tabentry->analyze_timestamp;

    if (result == 0)
        PG_RETURN_NULL();
    else
        PG_RETURN_TIMESTAMPTZ(result);
}

pg_stat_get_last_autoanalyze_time()

Datum pg_stat_get_last_autoanalyze_time

(

PG_FUNCTION_ARGS

)

Definition at line 304 of file pgstatfuncs.c.

References PgStat_StatTabEntry::autovac_analyze_timestamp, PG_GETARG_OID, PG_RETURN_NULL, PG_RETURN_TIMESTAMPTZ, and pgstat_fetch_stat_tabentry().

{
    Oid         relid = PG_GETARG_OID(0);
    TimestampTz result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = tabentry->autovac_analyze_timestamp;

    if (result == 0)
        PG_RETURN_NULL();
    else
        PG_RETURN_TIMESTAMPTZ(result);
}

pg_stat_get_last_autovacuum_time()

Datum pg_stat_get_last_autovacuum_time

(

PG_FUNCTION_ARGS

)

Definition at line 268 of file pgstatfuncs.c.

References PgStat_StatTabEntry::autovac_vacuum_timestamp, PG_GETARG_OID, PG_RETURN_NULL, PG_RETURN_TIMESTAMPTZ, and pgstat_fetch_stat_tabentry().

{
    Oid         relid = PG_GETARG_OID(0);
    TimestampTz result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = tabentry->autovac_vacuum_timestamp;

    if (result == 0)
        PG_RETURN_NULL();
    else
        PG_RETURN_TIMESTAMPTZ(result);
}

pg_stat_get_last_vacuum_time()

Datum pg_stat_get_last_vacuum_time

(

PG_FUNCTION_ARGS

)

Definition at line 250 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_NULL, PG_RETURN_TIMESTAMPTZ, pgstat_fetch_stat_tabentry(), and PgStat_StatTabEntry::vacuum_timestamp.

{
    Oid         relid = PG_GETARG_OID(0);
    TimestampTz result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = tabentry->vacuum_timestamp;

    if (result == 0)
        PG_RETURN_NULL();
    else
        PG_RETURN_TIMESTAMPTZ(result);
}

pg_stat_get_live_tuples()

Datum pg_stat_get_live_tuples

(

PG_FUNCTION_ARGS

)

Definition at line 155 of file pgstatfuncs.c.

References PgStat_StatTabEntry::n_live_tuples, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_tabentry().

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->n_live_tuples);

    PG_RETURN_INT64(result);
}

pg_stat_get_mod_since_analyze()

Datum pg_stat_get_mod_since_analyze

(

PG_FUNCTION_ARGS

)

Definition at line 187 of file pgstatfuncs.c.

References PgStat_StatTabEntry::changes_since_analyze, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_tabentry().

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->changes_since_analyze);

    PG_RETURN_INT64(result);
}

pg_stat_get_numscans()

Datum pg_stat_get_numscans

(

PG_FUNCTION_ARGS

)

Definition at line 43 of file pgstatfuncs.c.

References PgStat_StatTabEntry::numscans, PG_GETARG_OID, PG_RETURN_INT64, and pgstat_fetch_stat_tabentry().

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->numscans);

    PG_RETURN_INT64(result);
}

pg_stat_get_progress_info()

Datum pg_stat_get_progress_info

(

PG_FUNCTION_ARGS

)

Definition at line 460 of file pgstatfuncs.c.

References ReturnSetInfo::allowedModes, LocalPgBackendStatus::backendStatus, ReturnSetInfo::econtext, ExprContext::ecxt_per_query_memory, elog, ereport, errcode(), errmsg(), ERROR, get_call_result_type(), HAS_PGSTAT_PERMISSIONS, i, Int32GetDatum, Int64GetDatum(), IsA, MemoryContextSwitchTo(), MemSet, ObjectIdGetDatum, PG_GETARG_TEXT_PP, PG_STAT_GET_PROGRESS_COLS, pg_strcasecmp(), pgstat_fetch_stat_local_beentry(), pgstat_fetch_stat_numbackends(), PGSTAT_NUM_PROGRESS_PARAM, PROGRESS_COMMAND_ANALYZE, PROGRESS_COMMAND_BASEBACKUP, PROGRESS_COMMAND_CLUSTER, PROGRESS_COMMAND_COPY, PROGRESS_COMMAND_CREATE_INDEX, PROGRESS_COMMAND_VACUUM, ReturnSetInfo::returnMode, ReturnSetInfo::setDesc, ReturnSetInfo::setResult, SFRM_Materialize, PgBackendStatus::st_databaseid, PgBackendStatus::st_procpid, PgBackendStatus::st_progress_command, PgBackendStatus::st_progress_command_target, PgBackendStatus::st_progress_param, PgBackendStatus::st_userid, text_to_cstring(), tuplestore_begin_heap(), tuplestore_donestoring, tuplestore_putvalues(), TYPEFUNC_COMPOSITE, values, and work_mem.

{
#define PG_STAT_GET_PROGRESS_COLS   PGSTAT_NUM_PROGRESS_PARAM + 3
    int         num_backends = pgstat_fetch_stat_numbackends();
    int         curr_backend;
    char       *cmd = text_to_cstring(PG_GETARG_TEXT_PP(0));
    ProgressCommandType cmdtype;
    TupleDesc   tupdesc;
    Tuplestorestate *tupstore;
    ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
    MemoryContext per_query_ctx;
    MemoryContext oldcontext;

    /* check to see if caller supports us returning a tuplestore */
    if (rsinfo == NULL || !IsA(rsinfo, ReturnSetInfo))
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("set-valued function called in context that cannot accept a set")));
    if (!(rsinfo->allowedModes & SFRM_Materialize))
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("materialize mode required, but it is not allowed in this context")));

    /* Build a tuple descriptor for our result type */
    if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
        elog(ERROR, "return type must be a row type");

    /* Translate command name into command type code. */
    if (pg_strcasecmp(cmd, "VACUUM") == 0)
        cmdtype = PROGRESS_COMMAND_VACUUM;
    else if (pg_strcasecmp(cmd, "ANALYZE") == 0)
        cmdtype = PROGRESS_COMMAND_ANALYZE;
    else if (pg_strcasecmp(cmd, "CLUSTER") == 0)
        cmdtype = PROGRESS_COMMAND_CLUSTER;
    else if (pg_strcasecmp(cmd, "CREATE INDEX") == 0)
        cmdtype = PROGRESS_COMMAND_CREATE_INDEX;
    else if (pg_strcasecmp(cmd, "BASEBACKUP") == 0)
        cmdtype = PROGRESS_COMMAND_BASEBACKUP;
    else if (pg_strcasecmp(cmd, "COPY") == 0)
        cmdtype = PROGRESS_COMMAND_COPY;
    else
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                 errmsg("invalid command name: \"%s\"", cmd)));

    per_query_ctx = rsinfo->econtext->ecxt_per_query_memory;
    oldcontext = MemoryContextSwitchTo(per_query_ctx);

    tupstore = tuplestore_begin_heap(true, false, work_mem);
    rsinfo->returnMode = SFRM_Materialize;
    rsinfo->setResult = tupstore;
    rsinfo->setDesc = tupdesc;
    MemoryContextSwitchTo(oldcontext);

    /* 1-based index */
    for (curr_backend = 1; curr_backend <= num_backends; curr_backend++)
    {
        LocalPgBackendStatus *local_beentry;
        PgBackendStatus *beentry;
        Datum       values[PG_STAT_GET_PROGRESS_COLS];
        bool        nulls[PG_STAT_GET_PROGRESS_COLS];
        int         i;

        MemSet(values, 0, sizeof(values));
        MemSet(nulls, 0, sizeof(nulls));

        local_beentry = pgstat_fetch_stat_local_beentry(curr_backend);

        if (!local_beentry)
            continue;

        beentry = &local_beentry->backendStatus;

        /*
         * Report values for only those backends which are running the given
         * command.
         */
        if (!beentry || beentry->st_progress_command != cmdtype)
            continue;

        /* Value available to all callers */
        values[0] = Int32GetDatum(beentry->st_procpid);
        values[1] = ObjectIdGetDatum(beentry->st_databaseid);

        /* show rest of the values including relid only to role members */
        if (HAS_PGSTAT_PERMISSIONS(beentry->st_userid))
        {
            values[2] = ObjectIdGetDatum(beentry->st_progress_command_target);
            for (i = 0; i < PGSTAT_NUM_PROGRESS_PARAM; i++)
                values[i + 3] = Int64GetDatum(beentry->st_progress_param[i]);
        }
        else
        {
            nulls[2] = true;
            for (i = 0; i < PGSTAT_NUM_PROGRESS_PARAM; i++)
                nulls[i + 3] = true;
        }

        tuplestore_putvalues(tupstore, tupdesc, values, nulls);
    }

    /* clean up and return the tuplestore */
    tuplestore_donestoring(tupstore);

    return (Datum) 0;
}

pg_stat_get_replication_slot()

Datum pg_stat_get_replication_slot

(

PG_FUNCTION_ARGS

)

Definition at line 2314 of file pgstatfuncs.c.

References BlessTupleDesc(), CreateTemplateTupleDesc(), CStringGetTextDatum, heap_form_tuple(), HeapTupleGetDatum, Int64GetDatum(), MemSet, NameStr, namestrcpy(), PG_GETARG_TEXT_P, PG_RETURN_DATUM, PG_STAT_GET_REPLICATION_SLOT_COLS, pgstat_fetch_replslot(), PgStat_StatReplSlotEntry::spill_bytes, PgStat_StatReplSlotEntry::spill_count, PgStat_StatReplSlotEntry::spill_txns, PgStat_StatReplSlotEntry::stat_reset_timestamp, PgStat_StatReplSlotEntry::stream_bytes, PgStat_StatReplSlotEntry::stream_count, PgStat_StatReplSlotEntry::stream_txns, text_to_cstring(), TimestampTzGetDatum, PgStat_StatReplSlotEntry::total_bytes, PgStat_StatReplSlotEntry::total_txns, TupleDescInitEntry(), and values.

{
#define PG_STAT_GET_REPLICATION_SLOT_COLS 10
    text       *slotname_text = PG_GETARG_TEXT_P(0);
    NameData    slotname;
    TupleDesc   tupdesc;
    Datum       values[10];
    bool        nulls[10];
    PgStat_StatReplSlotEntry *slotent;
    PgStat_StatReplSlotEntry allzero;

    /* Initialise values and NULL flags arrays */
    MemSet(values, 0, sizeof(values));
    MemSet(nulls, 0, sizeof(nulls));

    /* Initialise attributes information in the tuple descriptor */
    tupdesc = CreateTemplateTupleDesc(PG_STAT_GET_REPLICATION_SLOT_COLS);
    TupleDescInitEntry(tupdesc, (AttrNumber) 1, "slot_name",
                       TEXTOID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 2, "spill_txns",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 3, "spill_count",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 4, "spill_bytes",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 5, "stream_txns",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 6, "stream_count",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 7, "stream_bytes",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 8, "total_txns",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 9, "total_bytes",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 10, "stats_reset",
                       TIMESTAMPTZOID, -1, 0);
    BlessTupleDesc(tupdesc);

    namestrcpy(&slotname, text_to_cstring(slotname_text));
    slotent = pgstat_fetch_replslot(slotname);
    if (!slotent)
    {
        /*
         * If the slot is not found, initialise its stats. This is possible if
         * the create slot message is lost.
         */
        memset(&allzero, 0, sizeof(PgStat_StatReplSlotEntry));
        slotent = &allzero;
    }

    values[0] = CStringGetTextDatum(NameStr(slotname));
    values[1] = Int64GetDatum(slotent->spill_txns);
    values[2] = Int64GetDatum(slotent->spill_count);
    values[3] = Int64GetDatum(slotent->spill_bytes);
    values[4] = Int64GetDatum(slotent->stream_txns);
    values[5] = Int64GetDatum(slotent->stream_count);
    values[6] = Int64GetDatum(slotent->stream_bytes);
    values[7] = Int64GetDatum(slotent->total_txns);
    values[8] = Int64GetDatum(slotent->total_bytes);

    if (slotent->stat_reset_timestamp == 0)
        nulls[9] = true;
    else
        values[9] = TimestampTzGetDatum(slotent->stat_reset_timestamp);

    /* Returns the record as Datum */
    PG_RETURN_DATUM(HeapTupleGetDatum(heap_form_tuple(tupdesc, values, nulls)));
}

pg_stat_get_slru()

Datum pg_stat_get_slru

(

PG_FUNCTION_ARGS

)

Definition at line 1872 of file pgstatfuncs.c.

References ReturnSetInfo::allowedModes, PgStat_SLRUStats::blocks_exists, PgStat_SLRUStats::blocks_hit, PgStat_SLRUStats::blocks_read, PgStat_SLRUStats::blocks_written, PgStat_SLRUStats::blocks_zeroed, cstring_to_text(), ReturnSetInfo::econtext, ExprContext::ecxt_per_query_memory, elog, ereport, errcode(), errmsg(), ERROR, PgStat_SLRUStats::flush, get_call_result_type(), i, Int64GetDatum(), IsA, MemoryContextSwitchTo(), MemSet, name, PG_STAT_GET_SLRU_COLS, pgstat_fetch_slru(), pgstat_slru_name(), PointerGetDatum, ReturnSetInfo::returnMode, ReturnSetInfo::setDesc, ReturnSetInfo::setResult, SFRM_Materialize, PgStat_SLRUStats::stat_reset_timestamp, TimestampTzGetDatum, PgStat_SLRUStats::truncate, tuplestore_begin_heap(), tuplestore_donestoring, tuplestore_putvalues(), TYPEFUNC_COMPOSITE, values, and work_mem.

{
#define PG_STAT_GET_SLRU_COLS   9
    ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
    TupleDesc   tupdesc;
    Tuplestorestate *tupstore;
    MemoryContext per_query_ctx;
    MemoryContext oldcontext;
    int         i;
    PgStat_SLRUStats *stats;

    /* check to see if caller supports us returning a tuplestore */
    if (rsinfo == NULL || !IsA(rsinfo, ReturnSetInfo))
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("set-valued function called in context that cannot accept a set")));
    if (!(rsinfo->allowedModes & SFRM_Materialize))
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("materialize mode required, but it is not allowed in this context")));

    /* Build a tuple descriptor for our result type */
    if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
        elog(ERROR, "return type must be a row type");

    per_query_ctx = rsinfo->econtext->ecxt_per_query_memory;
    oldcontext = MemoryContextSwitchTo(per_query_ctx);

    tupstore = tuplestore_begin_heap(true, false, work_mem);
    rsinfo->returnMode = SFRM_Materialize;
    rsinfo->setResult = tupstore;
    rsinfo->setDesc = tupdesc;

    MemoryContextSwitchTo(oldcontext);

    /* request SLRU stats from the stat collector */
    stats = pgstat_fetch_slru();

    for (i = 0;; i++)
    {
        /* for each row */
        Datum       values[PG_STAT_GET_SLRU_COLS];
        bool        nulls[PG_STAT_GET_SLRU_COLS];
        PgStat_SLRUStats stat = stats[i];
        const char *name;

        name = pgstat_slru_name(i);

        if (!name)
            break;

        MemSet(values, 0, sizeof(values));
        MemSet(nulls, 0, sizeof(nulls));

        values[0] = PointerGetDatum(cstring_to_text(name));
        values[1] = Int64GetDatum(stat.blocks_zeroed);
        values[2] = Int64GetDatum(stat.blocks_hit);
        values[3] = Int64GetDatum(stat.blocks_read);
        values[4] = Int64GetDatum(stat.blocks_written);
        values[5] = Int64GetDatum(stat.blocks_exists);
        values[6] = Int64GetDatum(stat.flush);
        values[7] = Int64GetDatum(stat.truncate);
        values[8] = TimestampTzGetDatum(stat.stat_reset_timestamp);

        tuplestore_putvalues(tupstore, tupdesc, values, nulls);
    }

    /* clean up and return the tuplestore */
    tuplestore_donestoring(tupstore);

    return (Datum) 0;
}

pg_stat_get_snapshot_timestamp()

Datum pg_stat_get_snapshot_timestamp

(

PG_FUNCTION_ARGS

)

Definition at line 2134 of file pgstatfuncs.c.

References PG_RETURN_TIMESTAMPTZ, and pgstat_fetch_global().

{
    PG_RETURN_TIMESTAMPTZ(pgstat_fetch_global()->stats_timestamp);
}

pg_stat_get_tuples_deleted()

Datum pg_stat_get_tuples_deleted

(

PG_FUNCTION_ARGS

)

Definition at line 123 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_INT64, pgstat_fetch_stat_tabentry(), and PgStat_StatTabEntry::tuples_deleted.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->tuples_deleted);

    PG_RETURN_INT64(result);
}

pg_stat_get_tuples_fetched()

Datum pg_stat_get_tuples_fetched

(

PG_FUNCTION_ARGS

)

Definition at line 75 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_INT64, pgstat_fetch_stat_tabentry(), and PgStat_StatTabEntry::tuples_fetched.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->tuples_fetched);

    PG_RETURN_INT64(result);
}

pg_stat_get_tuples_hot_updated()

Datum pg_stat_get_tuples_hot_updated

(

PG_FUNCTION_ARGS

)

Definition at line 139 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_INT64, pgstat_fetch_stat_tabentry(), and PgStat_StatTabEntry::tuples_hot_updated.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->tuples_hot_updated);

    PG_RETURN_INT64(result);
}

pg_stat_get_tuples_inserted()

Datum pg_stat_get_tuples_inserted

(

PG_FUNCTION_ARGS

)

Definition at line 91 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_INT64, pgstat_fetch_stat_tabentry(), and PgStat_StatTabEntry::tuples_inserted.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->tuples_inserted);

    PG_RETURN_INT64(result);
}

pg_stat_get_tuples_returned()

Datum pg_stat_get_tuples_returned

(

PG_FUNCTION_ARGS

)

Definition at line 59 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_INT64, pgstat_fetch_stat_tabentry(), and PgStat_StatTabEntry::tuples_returned.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->tuples_returned);

    PG_RETURN_INT64(result);
}

pg_stat_get_tuples_updated()

Datum pg_stat_get_tuples_updated

(

PG_FUNCTION_ARGS

)

Definition at line 107 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_INT64, pgstat_fetch_stat_tabentry(), and PgStat_StatTabEntry::tuples_updated.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->tuples_updated);

    PG_RETURN_INT64(result);
}

pg_stat_get_vacuum_count()

Datum pg_stat_get_vacuum_count

(

PG_FUNCTION_ARGS

)

Definition at line 322 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_INT64, pgstat_fetch_stat_tabentry(), and PgStat_StatTabEntry::vacuum_count.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_StatTabEntry *tabentry;

    if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->vacuum_count);

    PG_RETURN_INT64(result);
}

pg_stat_get_wal()

Datum pg_stat_get_wal

(

PG_FUNCTION_ARGS

)

Definition at line 1804 of file pgstatfuncs.c.

References BlessTupleDesc(), buf, CreateTemplateTupleDesc(), CStringGetDatum, DirectFunctionCall3, Float8GetDatum(), heap_form_tuple(), HeapTupleGetDatum, Int32GetDatum, Int64GetDatum(), MemSet, numeric_in(), ObjectIdGetDatum, PG_RETURN_DATUM, PG_STAT_GET_WAL_COLS, pgstat_fetch_stat_wal(), snprintf, PgStat_WalStats::stat_reset_timestamp, TimestampTzGetDatum, TupleDescInitEntry(), UINT64_FORMAT, values, PgStat_WalStats::wal_buffers_full, PgStat_WalStats::wal_bytes, PgStat_WalStats::wal_fpi, PgStat_WalStats::wal_records, PgStat_WalStats::wal_sync, PgStat_WalStats::wal_sync_time, PgStat_WalStats::wal_write, and PgStat_WalStats::wal_write_time.

{
#define PG_STAT_GET_WAL_COLS    9
    TupleDesc   tupdesc;
    Datum       values[PG_STAT_GET_WAL_COLS];
    bool        nulls[PG_STAT_GET_WAL_COLS];
    char        buf[256];
    PgStat_WalStats *wal_stats;

    /* Initialise values and NULL flags arrays */
    MemSet(values, 0, sizeof(values));
    MemSet(nulls, 0, sizeof(nulls));

    /* Initialise attributes information in the tuple descriptor */
    tupdesc = CreateTemplateTupleDesc(PG_STAT_GET_WAL_COLS);
    TupleDescInitEntry(tupdesc, (AttrNumber) 1, "wal_records",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 2, "wal_fpi",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 3, "wal_bytes",
                       NUMERICOID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 4, "wal_buffers_full",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 5, "wal_write",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 6, "wal_sync",
                       INT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 7, "wal_write_time",
                       FLOAT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 8, "wal_sync_time",
                       FLOAT8OID, -1, 0);
    TupleDescInitEntry(tupdesc, (AttrNumber) 9, "stats_reset",
                       TIMESTAMPTZOID, -1, 0);

    BlessTupleDesc(tupdesc);

    /* Get statistics about WAL activity */
    wal_stats = pgstat_fetch_stat_wal();

    /* Fill values and NULLs */
    values[0] = Int64GetDatum(wal_stats->wal_records);
    values[1] = Int64GetDatum(wal_stats->wal_fpi);

    /* Convert to numeric. */
    snprintf(buf, sizeof buf, UINT64_FORMAT, wal_stats->wal_bytes);
    values[2] = DirectFunctionCall3(numeric_in,
                                    CStringGetDatum(buf),
                                    ObjectIdGetDatum(0),
                                    Int32GetDatum(-1));

    values[3] = Int64GetDatum(wal_stats->wal_buffers_full);
    values[4] = Int64GetDatum(wal_stats->wal_write);
    values[5] = Int64GetDatum(wal_stats->wal_sync);

    /* Convert counters from microsec to millisec for display */
    values[6] = Float8GetDatum(((double) wal_stats->wal_write_time) / 1000.0);
    values[7] = Float8GetDatum(((double) wal_stats->wal_sync_time) / 1000.0);

    values[8] = TimestampTzGetDatum(wal_stats->stat_reset_timestamp);

    /* Returns the record as Datum */
    PG_RETURN_DATUM(HeapTupleGetDatum(heap_form_tuple(tupdesc, values, nulls)));
}

pg_stat_get_xact_blocks_fetched()

Datum pg_stat_get_xact_blocks_fetched

(

PG_FUNCTION_ARGS

)

Definition at line 2069 of file pgstatfuncs.c.

References find_tabstat_entry(), PG_GETARG_OID, PG_RETURN_INT64, PgStat_TableCounts::t_blocks_fetched, and PgStat_TableStatus::t_counts.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_TableStatus *tabentry;

    if ((tabentry = find_tabstat_entry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->t_counts.t_blocks_fetched);

    PG_RETURN_INT64(result);
}

pg_stat_get_xact_blocks_hit()

Datum pg_stat_get_xact_blocks_hit

(

PG_FUNCTION_ARGS

)

Definition at line 2084 of file pgstatfuncs.c.

References find_tabstat_entry(), PG_GETARG_OID, PG_RETURN_INT64, PgStat_TableCounts::t_blocks_hit, and PgStat_TableStatus::t_counts.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_TableStatus *tabentry;

    if ((tabentry = find_tabstat_entry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->t_counts.t_blocks_hit);

    PG_RETURN_INT64(result);
}

pg_stat_get_xact_function_calls()

Datum pg_stat_get_xact_function_calls

(

PG_FUNCTION_ARGS

)

Definition at line 2099 of file pgstatfuncs.c.

References PgStat_BackendFunctionEntry::f_counts, PgStat_FunctionCounts::f_numcalls, find_funcstat_entry(), PG_GETARG_OID, PG_RETURN_INT64, and PG_RETURN_NULL.

{
    Oid         funcid = PG_GETARG_OID(0);
    PgStat_BackendFunctionEntry *funcentry;

    if ((funcentry = find_funcstat_entry(funcid)) == NULL)
        PG_RETURN_NULL();
    PG_RETURN_INT64(funcentry->f_counts.f_numcalls);
}

pg_stat_get_xact_function_self_time()

Datum pg_stat_get_xact_function_self_time

(

PG_FUNCTION_ARGS

)

Definition at line 2121 of file pgstatfuncs.c.

References PgStat_BackendFunctionEntry::f_counts, PgStat_FunctionCounts::f_self_time, find_funcstat_entry(), INSTR_TIME_GET_MILLISEC, PG_GETARG_OID, PG_RETURN_FLOAT8, and PG_RETURN_NULL.

{
    Oid         funcid = PG_GETARG_OID(0);
    PgStat_BackendFunctionEntry *funcentry;

    if ((funcentry = find_funcstat_entry(funcid)) == NULL)
        PG_RETURN_NULL();
    PG_RETURN_FLOAT8(INSTR_TIME_GET_MILLISEC(funcentry->f_counts.f_self_time));
}

pg_stat_get_xact_function_total_time()

Datum pg_stat_get_xact_function_total_time

(

PG_FUNCTION_ARGS

)

Definition at line 2110 of file pgstatfuncs.c.

References PgStat_BackendFunctionEntry::f_counts, PgStat_FunctionCounts::f_total_time, find_funcstat_entry(), INSTR_TIME_GET_MILLISEC, PG_GETARG_OID, PG_RETURN_FLOAT8, and PG_RETURN_NULL.

{
    Oid         funcid = PG_GETARG_OID(0);
    PgStat_BackendFunctionEntry *funcentry;

    if ((funcentry = find_funcstat_entry(funcid)) == NULL)
        PG_RETURN_NULL();
    PG_RETURN_FLOAT8(INSTR_TIME_GET_MILLISEC(funcentry->f_counts.f_total_time));
}

pg_stat_get_xact_numscans()

Datum pg_stat_get_xact_numscans

(

PG_FUNCTION_ARGS

)

Definition at line 1946 of file pgstatfuncs.c.

References find_tabstat_entry(), PG_GETARG_OID, PG_RETURN_INT64, PgStat_TableStatus::t_counts, and PgStat_TableCounts::t_numscans.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_TableStatus *tabentry;

    if ((tabentry = find_tabstat_entry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->t_counts.t_numscans);

    PG_RETURN_INT64(result);
}

pg_stat_get_xact_tuples_deleted()

Datum pg_stat_get_xact_tuples_deleted

(

PG_FUNCTION_ARGS

)

Definition at line 2033 of file pgstatfuncs.c.

References find_tabstat_entry(), PG_GETARG_OID, PG_RETURN_INT64, PgStat_TableStatus::t_counts, PgStat_TableCounts::t_tuples_deleted, PgStat_TableStatus::trans, trans, PgStat_TableXactStatus::tuples_deleted, and PgStat_TableXactStatus::upper.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_TableStatus *tabentry;
    PgStat_TableXactStatus *trans;

    if ((tabentry = find_tabstat_entry(relid)) == NULL)
        result = 0;
    else
    {
        result = tabentry->t_counts.t_tuples_deleted;
        /* live subtransactions' counts aren't in t_tuples_deleted yet */
        for (trans = tabentry->trans; trans != NULL; trans = trans->upper)
            result += trans->tuples_deleted;
    }

    PG_RETURN_INT64(result);
}

pg_stat_get_xact_tuples_fetched()

Datum pg_stat_get_xact_tuples_fetched

(

PG_FUNCTION_ARGS

)

Definition at line 1976 of file pgstatfuncs.c.

References find_tabstat_entry(), PG_GETARG_OID, PG_RETURN_INT64, PgStat_TableStatus::t_counts, and PgStat_TableCounts::t_tuples_fetched.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_TableStatus *tabentry;

    if ((tabentry = find_tabstat_entry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->t_counts.t_tuples_fetched);

    PG_RETURN_INT64(result);
}

pg_stat_get_xact_tuples_hot_updated()

Datum pg_stat_get_xact_tuples_hot_updated

(

PG_FUNCTION_ARGS

)

Definition at line 2054 of file pgstatfuncs.c.

References find_tabstat_entry(), PG_GETARG_OID, PG_RETURN_INT64, PgStat_TableStatus::t_counts, and PgStat_TableCounts::t_tuples_hot_updated.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_TableStatus *tabentry;

    if ((tabentry = find_tabstat_entry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->t_counts.t_tuples_hot_updated);

    PG_RETURN_INT64(result);
}

pg_stat_get_xact_tuples_inserted()

Datum pg_stat_get_xact_tuples_inserted

(

PG_FUNCTION_ARGS

)

Definition at line 1991 of file pgstatfuncs.c.

References find_tabstat_entry(), PG_GETARG_OID, PG_RETURN_INT64, PgStat_TableStatus::t_counts, PgStat_TableCounts::t_tuples_inserted, PgStat_TableStatus::trans, trans, PgStat_TableXactStatus::tuples_inserted, and PgStat_TableXactStatus::upper.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_TableStatus *tabentry;
    PgStat_TableXactStatus *trans;

    if ((tabentry = find_tabstat_entry(relid)) == NULL)
        result = 0;
    else
    {
        result = tabentry->t_counts.t_tuples_inserted;
        /* live subtransactions' counts aren't in t_tuples_inserted yet */
        for (trans = tabentry->trans; trans != NULL; trans = trans->upper)
            result += trans->tuples_inserted;
    }

    PG_RETURN_INT64(result);
}

pg_stat_get_xact_tuples_returned()

Datum pg_stat_get_xact_tuples_returned

(

PG_FUNCTION_ARGS

)

Definition at line 1961 of file pgstatfuncs.c.

References find_tabstat_entry(), PG_GETARG_OID, PG_RETURN_INT64, PgStat_TableStatus::t_counts, and PgStat_TableCounts::t_tuples_returned.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_TableStatus *tabentry;

    if ((tabentry = find_tabstat_entry(relid)) == NULL)
        result = 0;
    else
        result = (int64) (tabentry->t_counts.t_tuples_returned);

    PG_RETURN_INT64(result);
}

pg_stat_get_xact_tuples_updated()

Datum pg_stat_get_xact_tuples_updated

(

PG_FUNCTION_ARGS

)

Definition at line 2012 of file pgstatfuncs.c.

References find_tabstat_entry(), PG_GETARG_OID, PG_RETURN_INT64, PgStat_TableStatus::t_counts, PgStat_TableCounts::t_tuples_updated, PgStat_TableStatus::trans, trans, PgStat_TableXactStatus::tuples_updated, and PgStat_TableXactStatus::upper.

{
    Oid         relid = PG_GETARG_OID(0);
    int64       result;
    PgStat_TableStatus *tabentry;
    PgStat_TableXactStatus *trans;

    if ((tabentry = find_tabstat_entry(relid)) == NULL)
        result = 0;
    else
    {
        result = tabentry->t_counts.t_tuples_updated;
        /* live subtransactions' counts aren't in t_tuples_updated yet */
        for (trans = tabentry->trans; trans != NULL; trans = trans->upper)
            result += trans->tuples_updated;
    }

    PG_RETURN_INT64(result);
}

pg_stat_reset()

Datum pg_stat_reset

(

PG_FUNCTION_ARGS

)

Definition at line 2151 of file pgstatfuncs.c.

References PG_RETURN_VOID, and pgstat_reset_counters().

{
    pgstat_reset_counters();

    PG_RETURN_VOID();
}

pg_stat_reset_replication_slot()

Datum pg_stat_reset_replication_slot

(

PG_FUNCTION_ARGS

)

Definition at line 2206 of file pgstatfuncs.c.

References ereport, errcode(), errmsg(), ERROR, PG_ARGISNULL, PG_GETARG_TEXT_PP, PG_RETURN_VOID, pgstat_reset_replslot_counter(), SearchNamedReplicationSlot(), SlotIsPhysical, and text_to_cstring().

{
    char       *target = NULL;

    if (!PG_ARGISNULL(0))
    {
        ReplicationSlot *slot;

        target = text_to_cstring(PG_GETARG_TEXT_PP(0));

        /*
         * Check if the slot exists with the given name. It is possible that
         * by the time this message is executed the slot is dropped but at
         * least this check will ensure that the given name is for a valid
         * slot.
         */
        slot = SearchNamedReplicationSlot(target, true);

        if (!slot)
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                     errmsg("replication slot \"%s\" does not exist",
                            target)));

        /*
         * Nothing to do for physical slots as we collect stats only for
         * logical slots.
         */
        if (SlotIsPhysical(slot))
            PG_RETURN_VOID();
    }

    pgstat_reset_replslot_counter(target);

    PG_RETURN_VOID();
}

pg_stat_reset_shared()

Datum pg_stat_reset_shared

(

PG_FUNCTION_ARGS

)

Definition at line 2160 of file pgstatfuncs.c.

References PG_GETARG_TEXT_PP, PG_RETURN_VOID, pgstat_reset_shared_counters(), and text_to_cstring().

{
    char       *target = text_to_cstring(PG_GETARG_TEXT_PP(0));

    pgstat_reset_shared_counters(target);

    PG_RETURN_VOID();
}

pg_stat_reset_single_function_counters()

Datum pg_stat_reset_single_function_counters

(

PG_FUNCTION_ARGS

)

Definition at line 2181 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_VOID, pgstat_reset_single_counter(), and RESET_FUNCTION.

{
    Oid         funcoid = PG_GETARG_OID(0);

    pgstat_reset_single_counter(funcoid, RESET_FUNCTION);

    PG_RETURN_VOID();
}

pg_stat_reset_single_table_counters()

Datum pg_stat_reset_single_table_counters

(

PG_FUNCTION_ARGS

)

Definition at line 2171 of file pgstatfuncs.c.

References PG_GETARG_OID, PG_RETURN_VOID, pgstat_reset_single_counter(), and RESET_TABLE.

{
    Oid         taboid = PG_GETARG_OID(0);

    pgstat_reset_single_counter(taboid, RESET_TABLE);

    PG_RETURN_VOID();
}

pg_stat_reset_slru()

Datum pg_stat_reset_slru

(

PG_FUNCTION_ARGS

)

Definition at line 2192 of file pgstatfuncs.c.

References PG_ARGISNULL, PG_GETARG_TEXT_PP, PG_RETURN_VOID, pgstat_reset_slru_counter(), and text_to_cstring().

{
    char       *target = NULL;

    if (!PG_ARGISNULL(0))
        target = text_to_cstring(PG_GETARG_TEXT_PP(0));

    pgstat_reset_slru_counter(target);

    PG_RETURN_VOID();
}

Variable Documentation

bgwriterStats

PgStat_MsgBgWriter bgwriterStats