name.c File Reference

#include "postgres.h"
#include "catalog/namespace.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_type.h"
#include "libpq/pqformat.h"
#include "mb/pg_wchar.h"
#include "miscadmin.h"
#include "utils/array.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/varlena.h"

Include dependency graph for name.c:

Go to the source code of this file.

Functions
Datum	namein (PG_FUNCTION_ARGS)
Datum	nameout (PG_FUNCTION_ARGS)
Datum	namerecv (PG_FUNCTION_ARGS)
Datum	namesend (PG_FUNCTION_ARGS)
static int	namecmp (Name arg1, Name arg2, Oid collid)
Datum	nameeq (PG_FUNCTION_ARGS)
Datum	namene (PG_FUNCTION_ARGS)
Datum	namelt (PG_FUNCTION_ARGS)
Datum	namele (PG_FUNCTION_ARGS)
Datum	namegt (PG_FUNCTION_ARGS)
Datum	namege (PG_FUNCTION_ARGS)
Datum	btnamecmp (PG_FUNCTION_ARGS)
Datum	btnamesortsupport (PG_FUNCTION_ARGS)
void	namestrcpy (Name name, const char *str)
int	namestrcmp (Name name, const char *str)
Datum	current_user (PG_FUNCTION_ARGS)
Datum	session_user (PG_FUNCTION_ARGS)
Datum	current_schema (PG_FUNCTION_ARGS)
Datum	current_schemas (PG_FUNCTION_ARGS)
Datum	nameconcatoid (PG_FUNCTION_ARGS)

Function Documentation

btnamecmp()

Datum btnamecmp

(

PG_FUNCTION_ARGS

)

Definition at line 202 of file name.c.

References namecmp(), PG_GET_COLLATION, PG_GETARG_NAME, and PG_RETURN_INT32.

Referenced by leftmostvalue_name().

{
    Name        arg1 = PG_GETARG_NAME(0);
    Name        arg2 = PG_GETARG_NAME(1);

    PG_RETURN_INT32(namecmp(arg1, arg2, PG_GET_COLLATION()));
}

btnamesortsupport()

Datum btnamesortsupport

(

PG_FUNCTION_ARGS

)

Definition at line 211 of file name.c.

References MemoryContextSwitchTo(), PG_GETARG_POINTER, PG_RETURN_VOID, SortSupportData::ssup_collation, SortSupportData::ssup_cxt, and varstr_sortsupport().

{
    SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
    Oid         collid = ssup->ssup_collation;
    MemoryContext oldcontext;

    oldcontext = MemoryContextSwitchTo(ssup->ssup_cxt);

    /* Use generic string SortSupport */
    varstr_sortsupport(ssup, NAMEOID, collid);

    MemoryContextSwitchTo(oldcontext);

    PG_RETURN_VOID();
}

current_schema()

Datum current_schema

(

PG_FUNCTION_ARGS

)

Definition at line 279 of file name.c.

References CStringGetDatum, DirectFunctionCall1, fetch_search_path(), get_namespace_name(), linitial_oid, list_free(), namein(), NIL, PG_RETURN_DATUM, and PG_RETURN_NULL.

Referenced by ExecEvalSQLValueFunction().

{
    List       *search_path = fetch_search_path(false);
    char       *nspname;

    if (search_path == NIL)
        PG_RETURN_NULL();
    nspname = get_namespace_name(linitial_oid(search_path));
    list_free(search_path);
    if (!nspname)
        PG_RETURN_NULL();       /* recently-deleted namespace? */
    PG_RETURN_DATUM(DirectFunctionCall1(namein, CStringGetDatum(nspname)));
}

current_schemas()

Datum current_schemas

(

PG_FUNCTION_ARGS

)

Definition at line 294 of file name.c.

References construct_array(), CStringGetDatum, DirectFunctionCall1, fetch_search_path(), get_namespace_name(), i, lfirst_oid, list_free(), list_length(), NAMEDATALEN, namein(), palloc(), PG_GETARG_BOOL, and PG_RETURN_POINTER.

{
    List       *search_path = fetch_search_path(PG_GETARG_BOOL(0));
    ListCell   *l;
    Datum      *names;
    int         i;
    ArrayType  *array;

    names = (Datum *) palloc(list_length(search_path) * sizeof(Datum));
    i = 0;
    foreach(l, search_path)
    {
        char       *nspname;

        nspname = get_namespace_name(lfirst_oid(l));
        if (nspname)            /* watch out for deleted namespace */
        {
            names[i] = DirectFunctionCall1(namein, CStringGetDatum(nspname));
            i++;
        }
    }
    list_free(search_path);

    array = construct_array(names, i,
                            NAMEOID,
                            NAMEDATALEN,    /* sizeof(Name) */
                            false,  /* Name is not by-val */
                            TYPALIGN_CHAR); /* alignment of Name */

    PG_RETURN_POINTER(array);
}

current_user()

Datum current_user

(

PG_FUNCTION_ARGS

)

Definition at line 263 of file name.c.

References CStringGetDatum, DirectFunctionCall1, GetUserId(), GetUserNameFromId(), namein(), and PG_RETURN_DATUM.

Referenced by ExecEvalSQLValueFunction().

{
    PG_RETURN_DATUM(DirectFunctionCall1(namein, CStringGetDatum(GetUserNameFromId(GetUserId(), false))));
}

namecmp()

static int namecmp ( Name  arg1, Name  arg2, Oid  collid  )

static

Definition at line 135 of file name.c.

References NAMEDATALEN, NameStr, and varstr_cmp().

Referenced by btnamecmp(), nameeq(), namege(), namegt(), namele(), namelt(), and namene().

{
    /* Fast path for common case used in system catalogs */
    if (collid == C_COLLATION_OID)
        return strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN);

    /* Else rely on the varstr infrastructure */
    return varstr_cmp(NameStr(*arg1), strlen(NameStr(*arg1)),
                      NameStr(*arg2), strlen(NameStr(*arg2)),
                      collid);
}

nameconcatoid()

Datum nameconcatoid

(

PG_FUNCTION_ARGS

)

Definition at line 337 of file name.c.

References NAMEDATALEN, NameStr, palloc0(), PG_GETARG_NAME, PG_GETARG_OID, pg_mbcliplen(), PG_RETURN_NAME, and snprintf.

{
    Name        nam = PG_GETARG_NAME(0);
    Oid         oid = PG_GETARG_OID(1);
    Name        result;
    char        suffix[20];
    int         suflen;
    int         namlen;

    suflen = snprintf(suffix, sizeof(suffix), "_%u", oid);
    namlen = strlen(NameStr(*nam));

    /* Truncate oversize input by truncating name part, not suffix */
    if (namlen + suflen >= NAMEDATALEN)
        namlen = pg_mbcliplen(NameStr(*nam), namlen, NAMEDATALEN - 1 - suflen);

    /* We use palloc0 here to ensure result is zero-padded */
    result = (Name) palloc0(NAMEDATALEN);
    memcpy(NameStr(*result), NameStr(*nam), namlen);
    memcpy(NameStr(*result) + namlen, suffix, suflen);

    PG_RETURN_NAME(result);
}

nameeq()

Datum nameeq

(

PG_FUNCTION_ARGS

)

Definition at line 148 of file name.c.

References namecmp(), PG_GET_COLLATION, PG_GETARG_NAME, and PG_RETURN_BOOL.

{
    Name        arg1 = PG_GETARG_NAME(0);
    Name        arg2 = PG_GETARG_NAME(1);

    PG_RETURN_BOOL(namecmp(arg1, arg2, PG_GET_COLLATION()) == 0);
}

namege()

Datum namege

(

PG_FUNCTION_ARGS

)

Definition at line 193 of file name.c.

References namecmp(), PG_GET_COLLATION, PG_GETARG_NAME, and PG_RETURN_BOOL.

{
    Name        arg1 = PG_GETARG_NAME(0);
    Name        arg2 = PG_GETARG_NAME(1);

    PG_RETURN_BOOL(namecmp(arg1, arg2, PG_GET_COLLATION()) >= 0);
}

namegt()

Datum namegt

(

PG_FUNCTION_ARGS

)

Definition at line 184 of file name.c.

References namecmp(), PG_GET_COLLATION, PG_GETARG_NAME, and PG_RETURN_BOOL.

{
    Name        arg1 = PG_GETARG_NAME(0);
    Name        arg2 = PG_GETARG_NAME(1);

    PG_RETURN_BOOL(namecmp(arg1, arg2, PG_GET_COLLATION()) > 0);
}

namein()

Datum namein

(

PG_FUNCTION_ARGS

)

Definition at line 48 of file name.c.

References NAMEDATALEN, NameStr, palloc0(), PG_GETARG_CSTRING, pg_mbcliplen(), and PG_RETURN_NAME.

Referenced by AlterSubscription(), convert_requires_to_datum(), CreateAccessMethod(), createdb(), CreateForeignDataWrapper(), CreateForeignServer(), CreatePolicy(), CreatePublication(), CreateRole(), CreateSubscription(), CreateTableSpace(), CreateTrigger(), current_schema(), current_schemas(), current_user(), get_available_versions_for_extension(), getdatabaseencoding(), InsertExtensionTuple(), pg_available_extensions(), pg_client_encoding(), pg_convert_from(), pg_convert_to(), PG_encoding_to_char(), pg_get_viewdef_worker(), plpgsql_fulfill_promise(), RenameRole(), session_user(), and string_to_datum().

{
    char       *s = PG_GETARG_CSTRING(0);
    Name        result;
    int         len;

    len = strlen(s);

    /* Truncate oversize input */
    if (len >= NAMEDATALEN)
        len = pg_mbcliplen(s, len, NAMEDATALEN - 1);

    /* We use palloc0 here to ensure result is zero-padded */
    result = (Name) palloc0(NAMEDATALEN);
    memcpy(NameStr(*result), s, len);

    PG_RETURN_NAME(result);
}

namele()

Datum namele

(

PG_FUNCTION_ARGS

)

Definition at line 175 of file name.c.

References namecmp(), PG_GET_COLLATION, PG_GETARG_NAME, and PG_RETURN_BOOL.

{
    Name        arg1 = PG_GETARG_NAME(0);
    Name        arg2 = PG_GETARG_NAME(1);

    PG_RETURN_BOOL(namecmp(arg1, arg2, PG_GET_COLLATION()) <= 0);
}

namelt()

Datum namelt

(

PG_FUNCTION_ARGS

)

Definition at line 166 of file name.c.

References namecmp(), PG_GET_COLLATION, PG_GETARG_NAME, and PG_RETURN_BOOL.

{
    Name        arg1 = PG_GETARG_NAME(0);
    Name        arg2 = PG_GETARG_NAME(1);

    PG_RETURN_BOOL(namecmp(arg1, arg2, PG_GET_COLLATION()) < 0);
}

namene()

Datum namene

(

PG_FUNCTION_ARGS

)

Definition at line 157 of file name.c.

References namecmp(), PG_GET_COLLATION, PG_GETARG_NAME, and PG_RETURN_BOOL.

{
    Name        arg1 = PG_GETARG_NAME(0);
    Name        arg2 = PG_GETARG_NAME(1);

    PG_RETURN_BOOL(namecmp(arg1, arg2, PG_GET_COLLATION()) != 0);
}

nameout()

Datum nameout

(

PG_FUNCTION_ARGS

)

Definition at line 71 of file name.c.

References NameStr, PG_GETARG_NAME, PG_RETURN_CSTRING, and pstrdup().

Referenced by make_greater_string(), and RelationBuildTriggers().

{
    Name        s = PG_GETARG_NAME(0);

    PG_RETURN_CSTRING(pstrdup(NameStr(*s)));
}

namerecv()

Datum namerecv

(

PG_FUNCTION_ARGS

)

Definition at line 82 of file name.c.

References buf, StringInfoData::cursor, ereport, errcode(), errdetail(), errmsg(), ERROR, StringInfoData::len, NAMEDATALEN, palloc0(), pfree(), PG_GETARG_POINTER, PG_RETURN_NAME, pq_getmsgtext(), and generate_unaccent_rules::str.

{
    StringInfo  buf = (StringInfo) PG_GETARG_POINTER(0);
    Name        result;
    char       *str;
    int         nbytes;

    str = pq_getmsgtext(buf, buf->len - buf->cursor, &nbytes);
    if (nbytes >= NAMEDATALEN)
        ereport(ERROR,
                (errcode(ERRCODE_NAME_TOO_LONG),
                 errmsg("identifier too long"),
                 errdetail("Identifier must be less than %d characters.",
                           NAMEDATALEN)));
    result = (NameData *) palloc0(NAMEDATALEN);
    memcpy(result, str, nbytes);
    pfree(str);
    PG_RETURN_NAME(result);
}

namesend()

Datum namesend

(

PG_FUNCTION_ARGS

)

Definition at line 106 of file name.c.

References buf, NameStr, PG_GETARG_NAME, PG_RETURN_BYTEA_P, pq_begintypsend(), pq_endtypsend(), and pq_sendtext().

{
    Name        s = PG_GETARG_NAME(0);
    StringInfoData buf;

    pq_begintypsend(&buf);
    pq_sendtext(&buf, NameStr(*s), strlen(NameStr(*s)));
    PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
}

namestrcmp()

int namestrcmp	(	Name	name,
		const char *	str
	)

Definition at line 247 of file name.c.

References NAMEDATALEN, and NameStr.

Referenced by attnameAttNum(), CopyGetAttnums(), expanded_record_lookup_field(), GetAttributeByName(), and SPI_fnumber().

{
    if (!name && !str)
        return 0;
    if (!name)
        return -1;              /* NULL < anything */
    if (!str)
        return 1;               /* NULL < anything */
    return strncmp(NameStr(*name), str, NAMEDATALEN);
}

namestrcpy()

void namestrcpy	(	Name	name,
		const char *	str
	)

Definition at line 233 of file name.c.

References NAMEDATALEN, and NameStr.

Referenced by AddEnumLabel(), AlterObjectRename_internal(), ATExecAddColumn(), CatCacheCopyKeys(), CollationCreate(), ConstructTupleDescriptor(), ConversionCreate(), CreateConstraintEntry(), CreateInitDecodingContext(), CreateOpFamily(), CreateProceduralLanguage(), CreateStatistics(), current_database(), DefineAttr(), DefineOpClass(), DefineTSConfiguration(), DefineTSDictionary(), DefineTSParser(), DefineTSTemplate(), EnumValuesCreate(), ExecTypeSetColNames(), formrdesc(), index_concurrently_swap(), insert_event_trigger_tuple(), InsertRule(), NamespaceCreate(), OperatorCreate(), OperatorShellMake(), ProcedureCreate(), RelationBuildLocalRelation(), RemoveAttributeById(), rename_policy(), renameatt_internal(), RenameConstraintById(), RenameDatabase(), RenameEnumLabel(), RenameRelationInternal(), RenameRewriteRule(), RenameSchema(), RenameTableSpace(), renametrig(), RenameTypeInternal(), ReplicationSlotCreate(), TupleDescInitBuiltinEntry(), TupleDescInitEntry(), TypeCreate(), TypeGetTupleDesc(), and TypeShellMake().

{
    /* NB: We need to zero-pad the destination. */
    strncpy(NameStr(*name), str, NAMEDATALEN);
    NameStr(*name)[NAMEDATALEN-1] = '\0';
}

session_user()

Datum session_user

(

PG_FUNCTION_ARGS

)

Definition at line 269 of file name.c.

References CStringGetDatum, DirectFunctionCall1, GetSessionUserId(), GetUserNameFromId(), namein(), and PG_RETURN_DATUM.

Referenced by ExecEvalSQLValueFunction().

{
    PG_RETURN_DATUM(DirectFunctionCall1(namein, CStringGetDatum(GetUserNameFromId(GetSessionUserId(), false))));
}