dest.h File Reference

#include "executor/tuptable.h"
#include "tcop/cmdtag.h"

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Go to the source code of this file.

Data Structures
struct	_DestReceiver

Typedefs
typedef struct _DestReceiver	DestReceiver

Enumerations
enum	CommandDest {   DestNone , DestDebug , DestRemote , DestRemoteExecute ,   DestRemoteSimple , DestSPI , DestTuplestore , DestIntoRel ,   DestCopyOut , DestSQLFunction , DestTransientRel , DestTupleQueue }

Functions
void	BeginCommand (CommandTag commandTag, CommandDest dest)
DestReceiver *	CreateDestReceiver (CommandDest dest)
void	EndCommand (const QueryCompletion *qc, CommandDest dest, bool force_undecorated_output)
void	EndReplicationCommand (const char *commandTag)
void	NullCommand (CommandDest dest)
void	ReadyForQuery (CommandDest dest)

Variables
PGDLLIMPORT DestReceiver *	None_Receiver

Typedef Documentation

DestReceiver

typedef struct _DestReceiver DestReceiver

Definition at line 1 of file dest.h.

Enumeration Type Documentation

CommandDest

enum CommandDest

Enumerator
DestNone
DestDebug
DestRemote
DestRemoteExecute
DestRemoteSimple
DestSPI
DestTuplestore
DestIntoRel
DestCopyOut
DestSQLFunction
DestTransientRel
DestTupleQueue

Definition at line 85 of file dest.h.

{
    DestNone,                   /* results are discarded */
    DestDebug,                  /* results go to debugging output */
    DestRemote,                 /* results sent to frontend process */
    DestRemoteExecute,          /* sent to frontend, in Execute command */
    DestRemoteSimple,           /* sent to frontend, w/no catalog access */
    DestSPI,                    /* results sent to SPI manager */
    DestTuplestore,             /* results sent to Tuplestore */
    DestIntoRel,                /* results sent to relation (SELECT INTO) */
    DestCopyOut,                /* results sent to COPY TO code */
    DestSQLFunction,            /* results sent to SQL-language func mgr */
    DestTransientRel,           /* results sent to transient relation */
    DestTupleQueue              /* results sent to tuple queue */
} CommandDest;

Function Documentation

BeginCommand()

void BeginCommand	(	CommandTag	commandTag,
		CommandDest	dest
	)

Definition at line 103 of file dest.c.

{
    /* Nothing to do at present */
}

Referenced by exec_execute_message(), and exec_simple_query().

CreateDestReceiver()

DestReceiver* CreateDestReceiver

(

CommandDest

dest

)

Definition at line 113 of file dest.c.

{
    /*
     * It's ok to cast the constness away as any modification of the none
     * receiver would be a bug (which gets easier to catch this way).
     */
 
    switch (dest)
    {
        case DestRemote:
        case DestRemoteExecute:
            return printtup_create_DR(dest);
 
        case DestRemoteSimple:
            return unconstify(DestReceiver *, &printsimpleDR);
 
        case DestNone:
            return unconstify(DestReceiver *, &donothingDR);
 
        case DestDebug:
            return unconstify(DestReceiver *, &debugtupDR);
 
        case DestSPI:
            return unconstify(DestReceiver *, &spi_printtupDR);
 
        case DestTuplestore:
            return CreateTuplestoreDestReceiver();
 
        case DestIntoRel:
            return CreateIntoRelDestReceiver(NULL);
 
        case DestCopyOut:
            return CreateCopyDestReceiver();
 
        case DestSQLFunction:
            return CreateSQLFunctionDestReceiver();
 
        case DestTransientRel:
            return CreateTransientRelDestReceiver(InvalidOid);
 
        case DestTupleQueue:
            return CreateTupleQueueDestReceiver(NULL);
    }
 
    /* should never get here */
    pg_unreachable();
}

References CreateCopyDestReceiver(), CreateIntoRelDestReceiver(), CreateSQLFunctionDestReceiver(), CreateTransientRelDestReceiver(), CreateTupleQueueDestReceiver(), CreateTuplestoreDestReceiver(), debugtupDR, generate_unaccent_rules::dest, DestCopyOut, DestDebug, DestIntoRel, DestNone, DestRemote, DestRemoteExecute, DestRemoteSimple, DestSPI, DestSQLFunction, DestTransientRel, DestTupleQueue, DestTuplestore, donothingDR, InvalidOid, pg_unreachable, printsimpleDR, printtup_create_DR(), spi_printtupDR, and unconstify.

Referenced by _SPI_execute_plan(), BeginCopyTo(), CreateReplicationSlot(), exec_execute_message(), exec_replication_command(), exec_simple_query(), exec_stmt_return_query(), execute_sql_string(), FillPortalStore(), IdentifySystem(), PersistHoldablePortal(), postquel_start(), ReadReplicationSlot(), SendTablespaceList(), SendTimeLineHistory(), SendXlogRecPtrResult(), SPI_cursor_fetch(), SPI_scroll_cursor_fetch(), and StartReplication().

EndCommand()

void EndCommand	(	const QueryCompletion *	qc,
		CommandDest	dest,
		bool	force_undecorated_output
	)

Definition at line 166 of file dest.c.

{
    char        completionTag[COMPLETION_TAG_BUFSIZE];
    Size        len;
 
    switch (dest)
    {
        case DestRemote:
        case DestRemoteExecute:
        case DestRemoteSimple:
 
            len = BuildQueryCompletionString(completionTag, qc,
                                             force_undecorated_output);
            pq_putmessage(PqMsg_CommandComplete, completionTag, len + 1);
 
        case DestNone:
        case DestDebug:
        case DestSPI:
        case DestTuplestore:
        case DestIntoRel:
        case DestCopyOut:
        case DestSQLFunction:
        case DestTransientRel:
        case DestTupleQueue:
            break;
    }
}

References BuildQueryCompletionString(), COMPLETION_TAG_BUFSIZE, generate_unaccent_rules::dest, DestCopyOut, DestDebug, DestIntoRel, DestNone, DestRemote, DestRemoteExecute, DestRemoteSimple, DestSPI, DestSQLFunction, DestTransientRel, DestTupleQueue, DestTuplestore, len, pq_putmessage, and PqMsg_CommandComplete.

Referenced by exec_execute_message(), exec_simple_query(), StartLogicalReplication(), and WalSndDone().

EndReplicationCommand()

void EndReplicationCommand

(

const char *

commandTag

)

Definition at line 201 of file dest.c.

{
    pq_putmessage(PqMsg_CommandComplete, commandTag, strlen(commandTag) + 1);
}

References pq_putmessage, and PqMsg_CommandComplete.

Referenced by exec_replication_command(), and StartReplication().

NullCommand()

void NullCommand

(

CommandDest

dest

)

Definition at line 214 of file dest.c.

{
    switch (dest)
    {
        case DestRemote:
        case DestRemoteExecute:
        case DestRemoteSimple:
 
            /* Tell the FE that we saw an empty query string */
            pq_putemptymessage(PqMsg_EmptyQueryResponse);
            break;
 
        case DestNone:
        case DestDebug:
        case DestSPI:
        case DestTuplestore:
        case DestIntoRel:
        case DestCopyOut:
        case DestSQLFunction:
        case DestTransientRel:
        case DestTupleQueue:
            break;
    }
}

References generate_unaccent_rules::dest, DestCopyOut, DestDebug, DestIntoRel, DestNone, DestRemote, DestRemoteExecute, DestRemoteSimple, DestSPI, DestSQLFunction, DestTransientRel, DestTupleQueue, DestTuplestore, pq_putemptymessage(), and PqMsg_EmptyQueryResponse.

Referenced by exec_execute_message(), and exec_simple_query().

ReadyForQuery()

void ReadyForQuery

(

CommandDest

dest

)

Definition at line 251 of file dest.c.

{
    switch (dest)
    {
        case DestRemote:
        case DestRemoteExecute:
        case DestRemoteSimple:
            {
                StringInfoData buf;
 
                pq_beginmessage(&buf, PqMsg_ReadyForQuery);
                pq_sendbyte(&buf, TransactionBlockStatusCode());
                pq_endmessage(&buf);
            }
            /* Flush output at end of cycle in any case. */
            pq_flush();
            break;
 
        case DestNone:
        case DestDebug:
        case DestSPI:
        case DestTuplestore:
        case DestIntoRel:
        case DestCopyOut:
        case DestSQLFunction:
        case DestTransientRel:
        case DestTupleQueue:
            break;
    }
}

References buf, generate_unaccent_rules::dest, DestCopyOut, DestDebug, DestIntoRel, DestNone, DestRemote, DestRemoteExecute, DestRemoteSimple, DestSPI, DestSQLFunction, DestTransientRel, DestTupleQueue, DestTuplestore, pq_beginmessage(), pq_endmessage(), pq_flush, pq_sendbyte(), PqMsg_ReadyForQuery, and TransactionBlockStatusCode().

Referenced by PostgresMain().

Variable Documentation

None_Receiver

PGDLLIMPORT DestReceiver* None_Receiver

extern

Definition at line 96 of file dest.c.

Referenced by CreateSchemaCommand(), DoPortalRunFetch(), ExplainOnePlan(), FillPortalStore(), ImportForeignSchema(), PerformPortalFetch(), PortalRunMulti(), PortalStart(), postquel_start(), ProcessUtilityForAlterTable(), ProcessUtilitySlow(), SPI_cursor_move(), and SPI_scroll_cursor_move().