funcapi.c File Reference

#include "postgres.h"
#include "access/htup_details.h"
#include "access/relation.h"
#include "catalog/namespace.h"
#include "catalog/pg_proc.h"
#include "catalog/pg_type.h"
#include "funcapi.h"
#include "miscadmin.h"
#include "nodes/nodeFuncs.h"
#include "utils/array.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/memutils.h"
#include "utils/regproc.h"
#include "utils/rel.h"
#include "utils/syscache.h"
#include "utils/tuplestore.h"
#include "utils/typcache.h"

Include dependency graph for funcapi.c:

Go to the source code of this file.

Data Structures
struct	polymorphic_actuals

Typedefs
typedef struct polymorphic_actuals	polymorphic_actuals

Functions
static void	shutdown_MultiFuncCall (Datum arg)
static TypeFuncClass	internal_get_result_type (Oid funcid, Node *call_expr, ReturnSetInfo *rsinfo, Oid *resultTypeId, TupleDesc *resultTupleDesc)
static void	resolve_anyelement_from_others (polymorphic_actuals *actuals)
static void	resolve_anyarray_from_others (polymorphic_actuals *actuals)
static void	resolve_anyrange_from_others (polymorphic_actuals *actuals)
static void	resolve_anymultirange_from_others (polymorphic_actuals *actuals)
static bool	resolve_polymorphic_tupdesc (TupleDesc tupdesc, oidvector *declared_args, Node *call_expr)
static TypeFuncClass	get_type_func_class (Oid typid, Oid *base_typeid)
void	InitMaterializedSRF (FunctionCallInfo fcinfo, bits32 flags)
FuncCallContext *	init_MultiFuncCall (PG_FUNCTION_ARGS)
FuncCallContext *	per_MultiFuncCall (PG_FUNCTION_ARGS)
void	end_MultiFuncCall (PG_FUNCTION_ARGS, FuncCallContext *funcctx)
TypeFuncClass	get_call_result_type (FunctionCallInfo fcinfo, Oid *resultTypeId, TupleDesc *resultTupleDesc)
TypeFuncClass	get_expr_result_type (Node *expr, Oid *resultTypeId, TupleDesc *resultTupleDesc)
TypeFuncClass	get_func_result_type (Oid functionId, Oid *resultTypeId, TupleDesc *resultTupleDesc)
TupleDesc	get_expr_result_tupdesc (Node *expr, bool noError)
bool	resolve_polymorphic_argtypes (int numargs, Oid *argtypes, char *argmodes, Node *call_expr)
int	get_func_arg_info (HeapTuple procTup, Oid **p_argtypes, char ***p_argnames, char **p_argmodes)
int	get_func_trftypes (HeapTuple procTup, Oid **p_trftypes)
int	get_func_input_arg_names (Datum proargnames, Datum proargmodes, char ***arg_names)
char *	get_func_result_name (Oid functionId)
TupleDesc	build_function_result_tupdesc_t (HeapTuple procTuple)
TupleDesc	build_function_result_tupdesc_d (char prokind, Datum proallargtypes, Datum proargmodes, Datum proargnames)
TupleDesc	RelationNameGetTupleDesc (const char *relname)
TupleDesc	TypeGetTupleDesc (Oid typeoid, List *colaliases)
int	extract_variadic_args (FunctionCallInfo fcinfo, int variadic_start, bool convert_unknown, Datum **args, Oid **types, bool **nulls)

Typedef Documentation

polymorphic_actuals

typedef struct polymorphic_actuals polymorphic_actuals

Function Documentation

build_function_result_tupdesc_d()

TupleDesc build_function_result_tupdesc_d	(	char	prokind,
		Datum	proallargtypes,
		Datum	proargmodes,
		Datum	proargnames
	)

Definition at line 1751 of file funcapi.c.

{
    TupleDesc   desc;
    ArrayType  *arr;
    int         numargs;
    Oid        *argtypes;
    char       *argmodes;
    Datum      *argnames = NULL;
    Oid        *outargtypes;
    char      **outargnames;
    int         numoutargs;
    int         nargnames;
    int         i;
 
    /* Can't have output args if columns are null */
    if (proallargtypes == PointerGetDatum(NULL) ||
        proargmodes == PointerGetDatum(NULL))
        return NULL;
 
    /*
     * We expect the arrays to be 1-D arrays of the right types; verify that.
     * For the OID and char arrays, we don't need to use deconstruct_array()
     * since the array data is just going to look like a C array of values.
     */
    arr = DatumGetArrayTypeP(proallargtypes);   /* ensure not toasted */
    numargs = ARR_DIMS(arr)[0];
    if (ARR_NDIM(arr) != 1 ||
        numargs < 0 ||
        ARR_HASNULL(arr) ||
        ARR_ELEMTYPE(arr) != OIDOID)
        elog(ERROR, "proallargtypes is not a 1-D Oid array or it contains nulls");
    argtypes = (Oid *) ARR_DATA_PTR(arr);
    arr = DatumGetArrayTypeP(proargmodes);  /* ensure not toasted */
    if (ARR_NDIM(arr) != 1 ||
        ARR_DIMS(arr)[0] != numargs ||
        ARR_HASNULL(arr) ||
        ARR_ELEMTYPE(arr) != CHAROID)
        elog(ERROR, "proargmodes is not a 1-D char array of length %d or it contains nulls",
             numargs);
    argmodes = (char *) ARR_DATA_PTR(arr);
    if (proargnames != PointerGetDatum(NULL))
    {
        arr = DatumGetArrayTypeP(proargnames);  /* ensure not toasted */
        if (ARR_NDIM(arr) != 1 ||
            ARR_DIMS(arr)[0] != numargs ||
            ARR_HASNULL(arr) ||
            ARR_ELEMTYPE(arr) != TEXTOID)
            elog(ERROR, "proargnames is not a 1-D text array of length %d or it contains nulls",
                 numargs);
        deconstruct_array_builtin(arr, TEXTOID, &argnames, NULL, &nargnames);
        Assert(nargnames == numargs);
    }
 
    /* zero elements probably shouldn't happen, but handle it gracefully */
    if (numargs <= 0)
        return NULL;
 
    /* extract output-argument types and names */
    outargtypes = (Oid *) palloc(numargs * sizeof(Oid));
    outargnames = (char **) palloc(numargs * sizeof(char *));
    numoutargs = 0;
    for (i = 0; i < numargs; i++)
    {
        char       *pname;
 
        if (argmodes[i] == PROARGMODE_IN ||
            argmodes[i] == PROARGMODE_VARIADIC)
            continue;
        Assert(argmodes[i] == PROARGMODE_OUT ||
               argmodes[i] == PROARGMODE_INOUT ||
               argmodes[i] == PROARGMODE_TABLE);
        outargtypes[numoutargs] = argtypes[i];
        if (argnames)
            pname = TextDatumGetCString(argnames[i]);
        else
            pname = NULL;
        if (pname == NULL || pname[0] == '\0')
        {
            /* Parameter is not named, so gin up a column name */
            pname = psprintf("column%d", numoutargs + 1);
        }
        outargnames[numoutargs] = pname;
        numoutargs++;
    }
 
    /*
     * If there is no output argument, or only one, the function does not
     * return tuples.
     */
    if (numoutargs < 2 && prokind != PROKIND_PROCEDURE)
        return NULL;
 
    desc = CreateTemplateTupleDesc(numoutargs);
    for (i = 0; i < numoutargs; i++)
    {
        TupleDescInitEntry(desc, i + 1,
                           outargnames[i],
                           outargtypes[i],
                           -1,
                           0);
    }
 
    return desc;
}

References ARR_DATA_PTR, ARR_DIMS, ARR_ELEMTYPE, ARR_HASNULL, ARR_NDIM, Assert(), CreateTemplateTupleDesc(), DatumGetArrayTypeP, deconstruct_array_builtin(), elog, ERROR, i, palloc(), PointerGetDatum(), psprintf(), TextDatumGetCString, and TupleDescInitEntry().

Referenced by build_function_result_tupdesc_t(), and ProcedureCreate().

build_function_result_tupdesc_t()

TupleDesc build_function_result_tupdesc_t

(

HeapTuple

procTuple

)

Definition at line 1705 of file funcapi.c.

{
    Form_pg_proc procform = (Form_pg_proc) GETSTRUCT(procTuple);
    Datum       proallargtypes;
    Datum       proargmodes;
    Datum       proargnames;
    bool        isnull;
 
    /* Return NULL if the function isn't declared to return RECORD */
    if (procform->prorettype != RECORDOID)
        return NULL;
 
    /* If there are no OUT parameters, return NULL */
    if (heap_attisnull(procTuple, Anum_pg_proc_proallargtypes, NULL) ||
        heap_attisnull(procTuple, Anum_pg_proc_proargmodes, NULL))
        return NULL;
 
    /* Get the data out of the tuple */
    proallargtypes = SysCacheGetAttrNotNull(PROCOID, procTuple,
                                            Anum_pg_proc_proallargtypes);
    proargmodes = SysCacheGetAttrNotNull(PROCOID, procTuple,
                                         Anum_pg_proc_proargmodes);
    proargnames = SysCacheGetAttr(PROCOID, procTuple,
                                  Anum_pg_proc_proargnames,
                                  &isnull);
    if (isnull)
        proargnames = PointerGetDatum(NULL);    /* just to be sure */
 
    return build_function_result_tupdesc_d(procform->prokind,
                                           proallargtypes,
                                           proargmodes,
                                           proargnames);
}

References build_function_result_tupdesc_d(), GETSTRUCT(), heap_attisnull(), PointerGetDatum(), SysCacheGetAttr(), and SysCacheGetAttrNotNull().

Referenced by CallStmtResultDesc(), internal_get_result_type(), and ProcedureCreate().

end_MultiFuncCall()

void end_MultiFuncCall	(	PG_FUNCTION_ARGS	,
		FuncCallContext *	funcctx
	)

Definition at line 220 of file funcapi.c.

{
    ReturnSetInfo *rsi = (ReturnSetInfo *) fcinfo->resultinfo;
 
    /* Deregister the shutdown callback */
    UnregisterExprContextCallback(rsi->econtext,
                                  shutdown_MultiFuncCall,
                                  PointerGetDatum(fcinfo->flinfo));
 
    /* But use it to do the real work */
    shutdown_MultiFuncCall(PointerGetDatum(fcinfo->flinfo));
}

References ReturnSetInfo::econtext, PointerGetDatum(), shutdown_MultiFuncCall(), and UnregisterExprContextCallback().

extract_variadic_args()

int extract_variadic_args	(	FunctionCallInfo	fcinfo,
		int	variadic_start,
		bool	convert_unknown,
		Datum **	args,
		Oid **	types,
		bool **	nulls
	)

Definition at line 2005 of file funcapi.c.

{
    bool        variadic = get_fn_expr_variadic(fcinfo->flinfo);
    Datum      *args_res;
    bool       *nulls_res;
    Oid        *types_res;
    int         nargs,
                i;
 
    *args = NULL;
    *types = NULL;
    *nulls = NULL;
 
    if (variadic)
    {
        ArrayType  *array_in;
        Oid         element_type;
        bool        typbyval;
        char        typalign;
        int16       typlen;
 
        Assert(PG_NARGS() == variadic_start + 1);
 
        if (PG_ARGISNULL(variadic_start))
            return -1;
 
        array_in = PG_GETARG_ARRAYTYPE_P(variadic_start);
        element_type = ARR_ELEMTYPE(array_in);
 
        get_typlenbyvalalign(element_type,
                             &typlen, &typbyval, &typalign);
        deconstruct_array(array_in, element_type, typlen, typbyval,
                          typalign, &args_res, &nulls_res,
                          &nargs);
 
        /* All the elements of the array have the same type */
        types_res = (Oid *) palloc0(nargs * sizeof(Oid));
        for (i = 0; i < nargs; i++)
            types_res[i] = element_type;
    }
    else
    {
        nargs = PG_NARGS() - variadic_start;
        Assert(nargs > 0);
        nulls_res = (bool *) palloc0(nargs * sizeof(bool));
        args_res = (Datum *) palloc0(nargs * sizeof(Datum));
        types_res = (Oid *) palloc0(nargs * sizeof(Oid));
 
        for (i = 0; i < nargs; i++)
        {
            nulls_res[i] = PG_ARGISNULL(i + variadic_start);
            types_res[i] = get_fn_expr_argtype(fcinfo->flinfo,
                                               i + variadic_start);
 
            /*
             * Turn a constant (more or less literal) value that's of unknown
             * type into text if required. Unknowns come in as a cstring
             * pointer. Note: for functions declared as taking type "any", the
             * parser will not do any type conversion on unknown-type literals
             * (that is, undecorated strings or NULLs).
             */
            if (convert_unknown &&
                types_res[i] == UNKNOWNOID &&
                get_fn_expr_arg_stable(fcinfo->flinfo, i + variadic_start))
            {
                types_res[i] = TEXTOID;
 
                if (PG_ARGISNULL(i + variadic_start))
                    args_res[i] = (Datum) 0;
                else
                    args_res[i] =
                        CStringGetTextDatum(PG_GETARG_POINTER(i + variadic_start));
            }
            else
            {
                /* no conversion needed, just take the datum as given */
                args_res[i] = PG_GETARG_DATUM(i + variadic_start);
            }
 
            if (!OidIsValid(types_res[i]) ||
                (convert_unknown && types_res[i] == UNKNOWNOID))
                ereport(ERROR,
                        (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                         errmsg("could not determine data type for argument %d",
                                i + 1)));
        }
    }
 
    /* Fill in results */
    *args = args_res;
    *nulls = nulls_res;
    *types = types_res;
 
    return nargs;
}

References generate_unaccent_rules::args, ARR_ELEMTYPE, array_in(), Assert(), CStringGetTextDatum, deconstruct_array(), ereport, errcode(), errmsg(), ERROR, FunctionCallInfoBaseData::flinfo, get_fn_expr_arg_stable(), get_fn_expr_argtype(), get_fn_expr_variadic(), get_typlenbyvalalign(), i, OidIsValid, palloc0(), PG_ARGISNULL, PG_GETARG_ARRAYTYPE_P, PG_GETARG_DATUM, PG_GETARG_POINTER, PG_NARGS, typalign, and types.

Referenced by json_build_array(), json_build_object(), jsonb_build_array(), jsonb_build_object(), and stats_fill_fcinfo_from_arg_pairs().

get_call_result_type()

TypeFuncClass get_call_result_type	(	FunctionCallInfo	fcinfo,
		Oid *	resultTypeId,
		TupleDesc *	resultTupleDesc
	)

Definition at line 276 of file funcapi.c.

{
    return internal_get_result_type(fcinfo->flinfo->fn_oid,
                                    fcinfo->flinfo->fn_expr,
                                    (ReturnSetInfo *) fcinfo->resultinfo,
                                    resultTypeId,
                                    resultTupleDesc);
}

References FunctionCallInfoBaseData::flinfo, FmgrInfo::fn_expr, FmgrInfo::fn_oid, internal_get_result_type(), and FunctionCallInfoBaseData::resultinfo.

Referenced by brin_metapage_info(), bt_metap(), bt_multi_page_stats(), bt_page_items_bytea(), bt_page_items_internal(), bt_page_stats_internal(), build_pgstattuple_type(), compute_function_hashkey(), copy_replication_slot(), crosstab(), get_record_type_from_query(), gin_leafpage_items(), gin_metapage_info(), gin_page_opaque_info(), gist_page_opaque_info(), hash_bitmap_info(), hash_metapage_info(), hash_page_items(), hash_page_stats(), heap_page_items(), heap_tuple_infomask_flags(), InitMaterializedSRF(), materializeResult(), page_header(), pg_backup_stop(), pg_buffercache_evict(), pg_buffercache_evict_all(), pg_buffercache_evict_relation(), pg_buffercache_numa_pages(), pg_buffercache_pages(), pg_buffercache_summary(), pg_control_checkpoint(), pg_control_init(), pg_control_recovery(), pg_control_system(), pg_create_logical_replication_slot(), pg_create_physical_replication_slot(), pg_get_catalog_foreign_keys(), pg_get_keywords(), pg_get_logical_snapshot_info(), pg_get_logical_snapshot_meta(), pg_get_multixact_members(), pg_get_object_address(), pg_get_wal_record_info(), pg_get_wal_summarizer_state(), pg_identify_object(), pg_identify_object_as_address(), pg_input_error_info(), pg_last_committed_xact(), pg_partition_tree(), pg_replication_slot_advance(), pg_sequence_parameters(), pg_split_walfile_name(), pg_stat_get_wal_receiver(), pg_stat_statements_info(), pg_stats_ext_mcvlist_items(), pg_timezone_abbrevs_abbrevs(), pg_timezone_abbrevs_zone(), pg_visibility_map_summary(), pg_xact_commit_timestamp_origin(), pgp_armor_headers(), pgstatginindex_internal(), pgstathashindex(), pgstatindex_impl(), pgstattuple_approx_internal(), plperl_return_next_internal(), plperl_sv_to_datum(), plpgsql_exec_function(), pltcl_func_handler(), PLy_exec_function(), prs_setup_firstcall(), setup_firstcall(), sql_compile_callback(), ssl_extension_info(), storeRow(), test_enc_conversion(), ts_setup_firstcall(), tsvector_unnest(), and tt_setup_firstcall().

get_expr_result_tupdesc()

TupleDesc get_expr_result_tupdesc	(	Node *	expr,
		bool	noError
	)

Definition at line 551 of file funcapi.c.

{
    TupleDesc   tupleDesc;
    TypeFuncClass functypclass;
 
    functypclass = get_expr_result_type(expr, NULL, &tupleDesc);
 
    if (functypclass == TYPEFUNC_COMPOSITE ||
        functypclass == TYPEFUNC_COMPOSITE_DOMAIN)
        return tupleDesc;
 
    if (!noError)
    {
        Oid         exprTypeId = exprType(expr);
 
        if (exprTypeId != RECORDOID)
            ereport(ERROR,
                    (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                     errmsg("type %s is not composite",
                            format_type_be(exprTypeId))));
        else
            ereport(ERROR,
                    (errcode(ERRCODE_WRONG_OBJECT_TYPE),
                     errmsg("record type has not been registered")));
    }
 
    return NULL;
}

References ereport, errcode(), errmsg(), ERROR, exprType(), format_type_be(), get_expr_result_type(), TYPEFUNC_COMPOSITE, and TYPEFUNC_COMPOSITE_DOMAIN.

Referenced by expandRecordVariable(), ExpandRowReference(), get_name_for_var_field(), get_rte_attribute_is_dropped(), ParseComplexProjection(), and process_function_rte_ref().

get_expr_result_type()

TypeFuncClass get_expr_result_type	(	Node *	expr,
		Oid *	resultTypeId,
		TupleDesc *	resultTupleDesc
	)

Definition at line 299 of file funcapi.c.

{
    TypeFuncClass result;
 
    if (expr && IsA(expr, FuncExpr))
        result = internal_get_result_type(((FuncExpr *) expr)->funcid,
                                          expr,
                                          NULL,
                                          resultTypeId,
                                          resultTupleDesc);
    else if (expr && IsA(expr, OpExpr))
        result = internal_get_result_type(get_opcode(((OpExpr *) expr)->opno),
                                          expr,
                                          NULL,
                                          resultTypeId,
                                          resultTupleDesc);
    else if (expr && IsA(expr, RowExpr) &&
             ((RowExpr *) expr)->row_typeid == RECORDOID)
    {
        /* We can resolve the record type by generating the tupdesc directly */
        RowExpr    *rexpr = (RowExpr *) expr;
        TupleDesc   tupdesc;
        AttrNumber  i = 1;
        ListCell   *lcc,
                   *lcn;
 
        tupdesc = CreateTemplateTupleDesc(list_length(rexpr->args));
        Assert(list_length(rexpr->args) == list_length(rexpr->colnames));
        forboth(lcc, rexpr->args, lcn, rexpr->colnames)
        {
            Node       *col = (Node *) lfirst(lcc);
            char       *colname = strVal(lfirst(lcn));
 
            TupleDescInitEntry(tupdesc, i,
                               colname,
                               exprType(col),
                               exprTypmod(col),
                               0);
            TupleDescInitEntryCollation(tupdesc, i,
                                        exprCollation(col));
            i++;
        }
        if (resultTypeId)
            *resultTypeId = rexpr->row_typeid;
        if (resultTupleDesc)
            *resultTupleDesc = BlessTupleDesc(tupdesc);
        return TYPEFUNC_COMPOSITE;
    }
    else if (expr && IsA(expr, Const) &&
             ((Const *) expr)->consttype == RECORDOID &&
             !((Const *) expr)->constisnull)
    {
        /*
         * When EXPLAIN'ing some queries with SEARCH/CYCLE clauses, we may
         * need to resolve field names of a RECORD-type Const.  The datum
         * should contain a typmod that will tell us that.
         */
        HeapTupleHeader rec;
        Oid         tupType;
        int32       tupTypmod;
 
        rec = DatumGetHeapTupleHeader(((Const *) expr)->constvalue);
        tupType = HeapTupleHeaderGetTypeId(rec);
        tupTypmod = HeapTupleHeaderGetTypMod(rec);
        if (resultTypeId)
            *resultTypeId = tupType;
        if (tupType != RECORDOID || tupTypmod >= 0)
        {
            /* Should be able to look it up */
            if (resultTupleDesc)
                *resultTupleDesc = lookup_rowtype_tupdesc_copy(tupType,
                                                               tupTypmod);
            return TYPEFUNC_COMPOSITE;
        }
        else
        {
            /* This shouldn't really happen ... */
            if (resultTupleDesc)
                *resultTupleDesc = NULL;
            return TYPEFUNC_RECORD;
        }
    }
    else
    {
        /* handle as a generic expression; no chance to resolve RECORD */
        Oid         typid = exprType(expr);
        Oid         base_typid;
 
        if (resultTypeId)
            *resultTypeId = typid;
        if (resultTupleDesc)
            *resultTupleDesc = NULL;
        result = get_type_func_class(typid, &base_typid);
        if ((result == TYPEFUNC_COMPOSITE ||
             result == TYPEFUNC_COMPOSITE_DOMAIN) &&
            resultTupleDesc)
            *resultTupleDesc = lookup_rowtype_tupdesc_copy(base_typid, -1);
    }
 
    return result;
}

References RowExpr::args, Assert(), BlessTupleDesc(), CreateTemplateTupleDesc(), DatumGetHeapTupleHeader, exprCollation(), exprType(), exprTypmod(), forboth, get_opcode(), get_type_func_class(), HeapTupleHeaderGetTypeId(), HeapTupleHeaderGetTypMod(), i, internal_get_result_type(), IsA, lfirst, list_length(), lookup_rowtype_tupdesc_copy(), strVal, TupleDescInitEntry(), TupleDescInitEntryCollation(), TYPEFUNC_COMPOSITE, TYPEFUNC_COMPOSITE_DOMAIN, and TYPEFUNC_RECORD.

Referenced by addRangeTableEntryForFunction(), ExecInitFunctionScan(), expandRTE(), get_expr_result_tupdesc(), init_sexpr(), inline_function(), inline_set_returning_function(), and pull_up_constant_function().

get_func_arg_info()

int get_func_arg_info	(	HeapTuple	procTup,
		Oid **	p_argtypes,
		char ***	p_argnames,
		char **	p_argmodes
	)

Definition at line 1379 of file funcapi.c.

{
    Form_pg_proc procStruct = (Form_pg_proc) GETSTRUCT(procTup);
    Datum       proallargtypes;
    Datum       proargmodes;
    Datum       proargnames;
    bool        isNull;
    ArrayType  *arr;
    int         numargs;
    Datum      *elems;
    int         nelems;
    int         i;
 
    /* First discover the total number of parameters and get their types */
    proallargtypes = SysCacheGetAttr(PROCOID, procTup,
                                     Anum_pg_proc_proallargtypes,
                                     &isNull);
    if (!isNull)
    {
        /*
         * We expect the arrays to be 1-D arrays of the right types; verify
         * that.  For the OID and char arrays, we don't need to use
         * deconstruct_array() since the array data is just going to look like
         * a C array of values.
         */
        arr = DatumGetArrayTypeP(proallargtypes);   /* ensure not toasted */
        numargs = ARR_DIMS(arr)[0];
        if (ARR_NDIM(arr) != 1 ||
            numargs < 0 ||
            ARR_HASNULL(arr) ||
            ARR_ELEMTYPE(arr) != OIDOID)
            elog(ERROR, "proallargtypes is not a 1-D Oid array or it contains nulls");
        Assert(numargs >= procStruct->pronargs);
        *p_argtypes = (Oid *) palloc(numargs * sizeof(Oid));
        memcpy(*p_argtypes, ARR_DATA_PTR(arr),
               numargs * sizeof(Oid));
    }
    else
    {
        /* If no proallargtypes, use proargtypes */
        numargs = procStruct->proargtypes.dim1;
        Assert(numargs == procStruct->pronargs);
        *p_argtypes = (Oid *) palloc(numargs * sizeof(Oid));
        memcpy(*p_argtypes, procStruct->proargtypes.values,
               numargs * sizeof(Oid));
    }
 
    /* Get argument names, if available */
    proargnames = SysCacheGetAttr(PROCOID, procTup,
                                  Anum_pg_proc_proargnames,
                                  &isNull);
    if (isNull)
        *p_argnames = NULL;
    else
    {
        deconstruct_array_builtin(DatumGetArrayTypeP(proargnames), TEXTOID,
                                  &elems, NULL, &nelems);
        if (nelems != numargs)  /* should not happen */
            elog(ERROR, "proargnames must have the same number of elements as the function has arguments");
        *p_argnames = (char **) palloc(sizeof(char *) * numargs);
        for (i = 0; i < numargs; i++)
            (*p_argnames)[i] = TextDatumGetCString(elems[i]);
    }
 
    /* Get argument modes, if available */
    proargmodes = SysCacheGetAttr(PROCOID, procTup,
                                  Anum_pg_proc_proargmodes,
                                  &isNull);
    if (isNull)
        *p_argmodes = NULL;
    else
    {
        arr = DatumGetArrayTypeP(proargmodes);  /* ensure not toasted */
        if (ARR_NDIM(arr) != 1 ||
            ARR_DIMS(arr)[0] != numargs ||
            ARR_HASNULL(arr) ||
            ARR_ELEMTYPE(arr) != CHAROID)
            elog(ERROR, "proargmodes is not a 1-D char array of length %d or it contains nulls",
                 numargs);
        *p_argmodes = (char *) palloc(numargs * sizeof(char));
        memcpy(*p_argmodes, ARR_DATA_PTR(arr),
               numargs * sizeof(char));
    }
 
    return numargs;
}

References ARR_DATA_PTR, ARR_DIMS, ARR_ELEMTYPE, ARR_HASNULL, ARR_NDIM, Assert(), DatumGetArrayTypeP, deconstruct_array_builtin(), elog, ERROR, GETSTRUCT(), i, palloc(), SysCacheGetAttr(), and TextDatumGetCString.

Referenced by make_callstmt_target(), MatchNamedCall(), pg_get_function_arg_default(), plperl_validator(), plpgsql_compile_callback(), plpgsql_validator(), plsample_func_handler(), PLy_procedure_create(), print_function_arguments(), and print_function_sqlbody().

get_func_input_arg_names()

int get_func_input_arg_names	(	Datum	proargnames,
		Datum	proargmodes,
		char ***	arg_names
	)

Definition at line 1522 of file funcapi.c.

{
    ArrayType  *arr;
    int         numargs;
    Datum      *argnames;
    char       *argmodes;
    char      **inargnames;
    int         numinargs;
    int         i;
 
    /* Do nothing if null proargnames */
    if (proargnames == PointerGetDatum(NULL))
    {
        *arg_names = NULL;
        return 0;
    }
 
    /*
     * We expect the arrays to be 1-D arrays of the right types; verify that.
     * For proargmodes, we don't need to use deconstruct_array() since the
     * array data is just going to look like a C array of values.
     */
    arr = DatumGetArrayTypeP(proargnames);  /* ensure not toasted */
    if (ARR_NDIM(arr) != 1 ||
        ARR_HASNULL(arr) ||
        ARR_ELEMTYPE(arr) != TEXTOID)
        elog(ERROR, "proargnames is not a 1-D text array or it contains nulls");
    deconstruct_array_builtin(arr, TEXTOID, &argnames, NULL, &numargs);
    if (proargmodes != PointerGetDatum(NULL))
    {
        arr = DatumGetArrayTypeP(proargmodes);  /* ensure not toasted */
        if (ARR_NDIM(arr) != 1 ||
            ARR_DIMS(arr)[0] != numargs ||
            ARR_HASNULL(arr) ||
            ARR_ELEMTYPE(arr) != CHAROID)
            elog(ERROR, "proargmodes is not a 1-D char array of length %d or it contains nulls",
                 numargs);
        argmodes = (char *) ARR_DATA_PTR(arr);
    }
    else
        argmodes = NULL;
 
    /* zero elements probably shouldn't happen, but handle it gracefully */
    if (numargs <= 0)
    {
        *arg_names = NULL;
        return 0;
    }
 
    /* extract input-argument names */
    inargnames = (char **) palloc(numargs * sizeof(char *));
    numinargs = 0;
    for (i = 0; i < numargs; i++)
    {
        if (argmodes == NULL ||
            argmodes[i] == PROARGMODE_IN ||
            argmodes[i] == PROARGMODE_INOUT ||
            argmodes[i] == PROARGMODE_VARIADIC)
        {
            char       *pname = TextDatumGetCString(argnames[i]);
 
            if (pname[0] != '\0')
                inargnames[numinargs] = pname;
            else
                inargnames[numinargs] = NULL;
            numinargs++;
        }
    }
 
    *arg_names = inargnames;
    return numinargs;
}

References ARR_DATA_PTR, ARR_DIMS, ARR_ELEMTYPE, ARR_HASNULL, ARR_NDIM, DatumGetArrayTypeP, deconstruct_array_builtin(), elog, ERROR, i, palloc(), PointerGetDatum(), and TextDatumGetCString.

Referenced by prepare_sql_fn_parse_info(), and ProcedureCreate().

get_func_result_name()

char * get_func_result_name

(

Oid

functionId

)

Definition at line 1607 of file funcapi.c.

{
    char       *result;
    HeapTuple   procTuple;
    Datum       proargmodes;
    Datum       proargnames;
    ArrayType  *arr;
    int         numargs;
    char       *argmodes;
    Datum      *argnames;
    int         numoutargs;
    int         nargnames;
    int         i;
 
    /* First fetch the function's pg_proc row */
    procTuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(functionId));
    if (!HeapTupleIsValid(procTuple))
        elog(ERROR, "cache lookup failed for function %u", functionId);
 
    /* If there are no named OUT parameters, return NULL */
    if (heap_attisnull(procTuple, Anum_pg_proc_proargmodes, NULL) ||
        heap_attisnull(procTuple, Anum_pg_proc_proargnames, NULL))
        result = NULL;
    else
    {
        /* Get the data out of the tuple */
        proargmodes = SysCacheGetAttrNotNull(PROCOID, procTuple,
                                             Anum_pg_proc_proargmodes);
        proargnames = SysCacheGetAttrNotNull(PROCOID, procTuple,
                                             Anum_pg_proc_proargnames);
 
        /*
         * We expect the arrays to be 1-D arrays of the right types; verify
         * that.  For the char array, we don't need to use deconstruct_array()
         * since the array data is just going to look like a C array of
         * values.
         */
        arr = DatumGetArrayTypeP(proargmodes);  /* ensure not toasted */
        numargs = ARR_DIMS(arr)[0];
        if (ARR_NDIM(arr) != 1 ||
            numargs < 0 ||
            ARR_HASNULL(arr) ||
            ARR_ELEMTYPE(arr) != CHAROID)
            elog(ERROR, "proargmodes is not a 1-D char array or it contains nulls");
        argmodes = (char *) ARR_DATA_PTR(arr);
        arr = DatumGetArrayTypeP(proargnames);  /* ensure not toasted */
        if (ARR_NDIM(arr) != 1 ||
            ARR_DIMS(arr)[0] != numargs ||
            ARR_HASNULL(arr) ||
            ARR_ELEMTYPE(arr) != TEXTOID)
            elog(ERROR, "proargnames is not a 1-D text array of length %d or it contains nulls",
                 numargs);
        deconstruct_array_builtin(arr, TEXTOID, &argnames, NULL, &nargnames);
        Assert(nargnames == numargs);
 
        /* scan for output argument(s) */
        result = NULL;
        numoutargs = 0;
        for (i = 0; i < numargs; i++)
        {
            if (argmodes[i] == PROARGMODE_IN ||
                argmodes[i] == PROARGMODE_VARIADIC)
                continue;
            Assert(argmodes[i] == PROARGMODE_OUT ||
                   argmodes[i] == PROARGMODE_INOUT ||
                   argmodes[i] == PROARGMODE_TABLE);
            if (++numoutargs > 1)
            {
                /* multiple out args, so forget it */
                result = NULL;
                break;
            }
            result = TextDatumGetCString(argnames[i]);
            if (result == NULL || result[0] == '\0')
            {
                /* Parameter is not named, so forget it */
                result = NULL;
                break;
            }
        }
    }
 
    ReleaseSysCache(procTuple);
 
    return result;
}

References ARR_DATA_PTR, ARR_DIMS, ARR_ELEMTYPE, ARR_HASNULL, ARR_NDIM, Assert(), DatumGetArrayTypeP, deconstruct_array_builtin(), elog, ERROR, heap_attisnull(), HeapTupleIsValid, i, ObjectIdGetDatum(), ReleaseSysCache(), SearchSysCache1(), SysCacheGetAttrNotNull(), and TextDatumGetCString.

Referenced by chooseScalarFunctionAlias().

get_func_result_type()

TypeFuncClass get_func_result_type	(	Oid	functionId,
		Oid *	resultTypeId,
		TupleDesc *	resultTupleDesc
	)

Definition at line 410 of file funcapi.c.

{
    return internal_get_result_type(functionId,
                                    NULL,
                                    NULL,
                                    resultTypeId,
                                    resultTupleDesc);
}

References internal_get_result_type().

Referenced by fmgr_sql_validator().

get_func_trftypes()

int get_func_trftypes	(	HeapTuple	procTup,
		Oid **	p_trftypes
	)

Definition at line 1475 of file funcapi.c.

{
    Datum       protrftypes;
    ArrayType  *arr;
    int         nelems;
    bool        isNull;
 
    protrftypes = SysCacheGetAttr(PROCOID, procTup,
                                  Anum_pg_proc_protrftypes,
                                  &isNull);
    if (!isNull)
    {
        /*
         * We expect the arrays to be 1-D arrays of the right types; verify
         * that.  For the OID and char arrays, we don't need to use
         * deconstruct_array() since the array data is just going to look like
         * a C array of values.
         */
        arr = DatumGetArrayTypeP(protrftypes);  /* ensure not toasted */
        nelems = ARR_DIMS(arr)[0];
        if (ARR_NDIM(arr) != 1 ||
            nelems < 0 ||
            ARR_HASNULL(arr) ||
            ARR_ELEMTYPE(arr) != OIDOID)
            elog(ERROR, "protrftypes is not a 1-D Oid array or it contains nulls");
        *p_trftypes = (Oid *) palloc(nelems * sizeof(Oid));
        memcpy(*p_trftypes, ARR_DATA_PTR(arr),
               nelems * sizeof(Oid));
 
        return nelems;
    }
    else
        return 0;
}

References ARR_DATA_PTR, ARR_DIMS, ARR_ELEMTYPE, ARR_HASNULL, ARR_NDIM, DatumGetArrayTypeP, elog, ERROR, palloc(), and SysCacheGetAttr().

Referenced by print_function_trftypes().

get_type_func_class()

static TypeFuncClass get_type_func_class ( Oid  typid, Oid *  base_typeid  )

static

Definition at line 1328 of file funcapi.c.

{
    *base_typeid = typid;
 
    switch (get_typtype(typid))
    {
        case TYPTYPE_COMPOSITE:
            return TYPEFUNC_COMPOSITE;
        case TYPTYPE_BASE:
        case TYPTYPE_ENUM:
        case TYPTYPE_RANGE:
        case TYPTYPE_MULTIRANGE:
            return TYPEFUNC_SCALAR;
        case TYPTYPE_DOMAIN:
            *base_typeid = typid = getBaseType(typid);
            if (get_typtype(typid) == TYPTYPE_COMPOSITE)
                return TYPEFUNC_COMPOSITE_DOMAIN;
            else                /* domain base type can't be a pseudotype */
                return TYPEFUNC_SCALAR;
        case TYPTYPE_PSEUDO:
            if (typid == RECORDOID)
                return TYPEFUNC_RECORD;
 
            /*
             * We treat VOID and CSTRING as legitimate scalar datatypes,
             * mostly for the convenience of the JDBC driver (which wants to
             * be able to do "SELECT * FROM foo()" for all legitimately
             * user-callable functions).
             */
            if (typid == VOIDOID || typid == CSTRINGOID)
                return TYPEFUNC_SCALAR;
            return TYPEFUNC_OTHER;
    }
    /* shouldn't get here, probably */
    return TYPEFUNC_OTHER;
}

References get_typtype(), getBaseType(), TYPEFUNC_COMPOSITE, TYPEFUNC_COMPOSITE_DOMAIN, TYPEFUNC_OTHER, TYPEFUNC_RECORD, and TYPEFUNC_SCALAR.

Referenced by get_expr_result_type(), internal_get_result_type(), and TypeGetTupleDesc().

init_MultiFuncCall()

FuncCallContext * init_MultiFuncCall

(

PG_FUNCTION_ARGS

)

Definition at line 133 of file funcapi.c.

{
    FuncCallContext *retval;
 
    /*
     * Bail if we're called in the wrong context
     */
    if (fcinfo->resultinfo == NULL || !IsA(fcinfo->resultinfo, ReturnSetInfo))
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("set-valued function called in context that cannot accept a set")));
 
    if (fcinfo->flinfo->fn_extra == NULL)
    {
        /*
         * First call
         */
        ReturnSetInfo *rsi = (ReturnSetInfo *) fcinfo->resultinfo;
        MemoryContext multi_call_ctx;
 
        /*
         * Create a suitably long-lived context to hold cross-call data
         */
        multi_call_ctx = AllocSetContextCreate(fcinfo->flinfo->fn_mcxt,
                                               "SRF multi-call context",
                                               ALLOCSET_SMALL_SIZES);
 
        /*
         * Allocate suitably long-lived space and zero it
         */
        retval = (FuncCallContext *)
            MemoryContextAllocZero(multi_call_ctx,
                                   sizeof(FuncCallContext));
 
        /*
         * initialize the elements
         */
        retval->call_cntr = 0;
        retval->max_calls = 0;
        retval->user_fctx = NULL;
        retval->attinmeta = NULL;
        retval->tuple_desc = NULL;
        retval->multi_call_memory_ctx = multi_call_ctx;
 
        /*
         * save the pointer for cross-call use
         */
        fcinfo->flinfo->fn_extra = retval;
 
        /*
         * Ensure we will get shut down cleanly if the exprcontext is not run
         * to completion.
         */
        RegisterExprContextCallback(rsi->econtext,
                                    shutdown_MultiFuncCall,
                                    PointerGetDatum(fcinfo->flinfo));
    }
    else
    {
        /* second and subsequent calls */
        elog(ERROR, "init_MultiFuncCall cannot be called more than once");
 
        /* never reached, but keep compiler happy */
        retval = NULL;
    }
 
    return retval;
}

References ALLOCSET_SMALL_SIZES, AllocSetContextCreate, FuncCallContext::attinmeta, FuncCallContext::call_cntr, ReturnSetInfo::econtext, elog, ereport, errcode(), errmsg(), ERROR, IsA, FuncCallContext::max_calls, MemoryContextAllocZero(), FuncCallContext::multi_call_memory_ctx, PointerGetDatum(), RegisterExprContextCallback(), shutdown_MultiFuncCall(), FuncCallContext::tuple_desc, and FuncCallContext::user_fctx.

InitMaterializedSRF()

void InitMaterializedSRF	(	FunctionCallInfo	fcinfo,
		bits32	flags
	)

Definition at line 76 of file funcapi.c.

{
    bool        random_access;
    ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
    Tuplestorestate *tupstore;
    MemoryContext old_context,
                per_query_ctx;
    TupleDesc   stored_tupdesc;
 
    /* check to see if caller supports 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) ||
        ((flags & MAT_SRF_USE_EXPECTED_DESC) != 0 && rsinfo->expectedDesc == NULL))
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("materialize mode required, but it is not allowed in this context")));
 
    /*
     * Store the tuplestore and the tuple descriptor in ReturnSetInfo.  This
     * must be done in the per-query memory context.
     */
    per_query_ctx = rsinfo->econtext->ecxt_per_query_memory;
    old_context = MemoryContextSwitchTo(per_query_ctx);
 
    /* build a tuple descriptor for our result type */
    if ((flags & MAT_SRF_USE_EXPECTED_DESC) != 0)
        stored_tupdesc = CreateTupleDescCopy(rsinfo->expectedDesc);
    else
    {
        if (get_call_result_type(fcinfo, NULL, &stored_tupdesc) != TYPEFUNC_COMPOSITE)
            elog(ERROR, "return type must be a row type");
    }
 
    /* If requested, bless the tuple descriptor */
    if ((flags & MAT_SRF_BLESS) != 0)
        BlessTupleDesc(stored_tupdesc);
 
    random_access = (rsinfo->allowedModes & SFRM_Materialize_Random) != 0;
 
    tupstore = tuplestore_begin_heap(random_access, false, work_mem);
    rsinfo->returnMode = SFRM_Materialize;
    rsinfo->setResult = tupstore;
    rsinfo->setDesc = stored_tupdesc;
    MemoryContextSwitchTo(old_context);
}

References ReturnSetInfo::allowedModes, BlessTupleDesc(), CreateTupleDescCopy(), ReturnSetInfo::econtext, ExprContext::ecxt_per_query_memory, elog, ereport, errcode(), errmsg(), ERROR, ReturnSetInfo::expectedDesc, get_call_result_type(), if(), IsA, MAT_SRF_BLESS, MAT_SRF_USE_EXPECTED_DESC, MemoryContextSwitchTo(), FunctionCallInfoBaseData::resultinfo, ReturnSetInfo::returnMode, ReturnSetInfo::setDesc, ReturnSetInfo::setResult, SFRM_Materialize, SFRM_Materialize_Random, tuplestore_begin_heap(), TYPEFUNC_COMPOSITE, and work_mem.

Referenced by brin_page_items(), dblink_get_notify(), each_worker(), each_worker_jsonb(), elements_worker(), elements_worker_jsonb(), get_altertable_subcmdinfo(), GetWALRecordsInfo(), gist_page_items(), gist_page_items_bytea(), pg_available_extension_versions(), pg_available_extensions(), pg_available_wal_summaries(), pg_config(), pg_cursor(), pg_event_trigger_ddl_commands(), pg_event_trigger_dropped_objects(), pg_extension_update_paths(), pg_get_aios(), pg_get_backend_memory_contexts(), pg_get_loaded_modules(), pg_get_process_memory_contexts(), pg_get_replication_slots(), pg_get_shmem_allocations(), pg_get_shmem_allocations_numa(), pg_get_wait_events(), pg_get_wal_block_info(), pg_hba_file_rules(), pg_ident_file_mappings(), pg_logical_slot_get_changes_guts(), pg_ls_dir(), pg_ls_dir_files(), pg_options_to_table(), pg_prepared_statement(), pg_show_replication_origin_status(), pg_stat_get_activity(), pg_stat_get_backend_io(), pg_stat_get_io(), pg_stat_get_progress_info(), pg_stat_get_recovery_prefetch(), pg_stat_get_slru(), pg_stat_get_subscription(), pg_stat_get_wal_senders(), pg_stat_statements_internal(), pg_tablespace_databases(), pg_wal_summary_contents(), pgrowlocks(), postgres_fdw_get_connections_internal(), show_all_file_settings(), text_to_table(), verify_heapam(), and xpath_table().

internal_get_result_type()

static TypeFuncClass internal_get_result_type ( Oid  funcid, Node *  call_expr, ReturnSetInfo *  rsinfo, Oid *  resultTypeId, TupleDesc *  resultTupleDesc  )

static

Definition at line 430 of file funcapi.c.

{
    TypeFuncClass result;
    HeapTuple   tp;
    Form_pg_proc procform;
    Oid         rettype;
    Oid         base_rettype;
    TupleDesc   tupdesc;
 
    /* First fetch the function's pg_proc row to inspect its rettype */
    tp = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcid));
    if (!HeapTupleIsValid(tp))
        elog(ERROR, "cache lookup failed for function %u", funcid);
    procform = (Form_pg_proc) GETSTRUCT(tp);
 
    rettype = procform->prorettype;
 
    /* Check for OUT parameters defining a RECORD result */
    tupdesc = build_function_result_tupdesc_t(tp);
    if (tupdesc)
    {
        /*
         * It has OUT parameters, so it's basically like a regular composite
         * type, except we have to be able to resolve any polymorphic OUT
         * parameters.
         */
        if (resultTypeId)
            *resultTypeId = rettype;
 
        if (resolve_polymorphic_tupdesc(tupdesc,
                                        &procform->proargtypes,
                                        call_expr))
        {
            if (tupdesc->tdtypeid == RECORDOID &&
                tupdesc->tdtypmod < 0)
                assign_record_type_typmod(tupdesc);
            if (resultTupleDesc)
                *resultTupleDesc = tupdesc;
            result = TYPEFUNC_COMPOSITE;
        }
        else
        {
            if (resultTupleDesc)
                *resultTupleDesc = NULL;
            result = TYPEFUNC_RECORD;
        }
 
        ReleaseSysCache(tp);
 
        return result;
    }
 
    /*
     * If scalar polymorphic result, try to resolve it.
     */
    if (IsPolymorphicType(rettype))
    {
        Oid         newrettype = exprType(call_expr);
 
        if (newrettype == InvalidOid)   /* this probably should not happen */
            ereport(ERROR,
                    (errcode(ERRCODE_DATATYPE_MISMATCH),
                     errmsg("could not determine actual result type for function \"%s\" declared to return type %s",
                            NameStr(procform->proname),
                            format_type_be(rettype))));
        rettype = newrettype;
    }
 
    if (resultTypeId)
        *resultTypeId = rettype;
    if (resultTupleDesc)
        *resultTupleDesc = NULL;    /* default result */
 
    /* Classify the result type */
    result = get_type_func_class(rettype, &base_rettype);
    switch (result)
    {
        case TYPEFUNC_COMPOSITE:
        case TYPEFUNC_COMPOSITE_DOMAIN:
            if (resultTupleDesc)
                *resultTupleDesc = lookup_rowtype_tupdesc_copy(base_rettype, -1);
            /* Named composite types can't have any polymorphic columns */
            break;
        case TYPEFUNC_SCALAR:
            break;
        case TYPEFUNC_RECORD:
            /* We must get the tupledesc from call context */
            if (rsinfo && IsA(rsinfo, ReturnSetInfo) &&
                rsinfo->expectedDesc != NULL)
            {
                result = TYPEFUNC_COMPOSITE;
                if (resultTupleDesc)
                    *resultTupleDesc = rsinfo->expectedDesc;
                /* Assume no polymorphic columns here, either */
            }
            break;
        default:
            break;
    }
 
    ReleaseSysCache(tp);
 
    return result;
}

References assign_record_type_typmod(), build_function_result_tupdesc_t(), elog, ereport, errcode(), errmsg(), ERROR, ReturnSetInfo::expectedDesc, exprType(), format_type_be(), get_type_func_class(), GETSTRUCT(), HeapTupleIsValid, InvalidOid, IsA, lookup_rowtype_tupdesc_copy(), NameStr, ObjectIdGetDatum(), ReleaseSysCache(), resolve_polymorphic_tupdesc(), SearchSysCache1(), TupleDescData::tdtypeid, TupleDescData::tdtypmod, TYPEFUNC_COMPOSITE, TYPEFUNC_COMPOSITE_DOMAIN, TYPEFUNC_RECORD, and TYPEFUNC_SCALAR.

Referenced by get_call_result_type(), get_expr_result_type(), and get_func_result_type().

per_MultiFuncCall()

FuncCallContext * per_MultiFuncCall

(

PG_FUNCTION_ARGS

)

Definition at line 208 of file funcapi.c.

{
    FuncCallContext *retval = (FuncCallContext *) fcinfo->flinfo->fn_extra;
 
    return retval;
}

RelationNameGetTupleDesc()

TupleDesc RelationNameGetTupleDesc

(

const char *

relname

)

Definition at line 1870 of file funcapi.c.

{
    RangeVar   *relvar;
    Relation    rel;
    TupleDesc   tupdesc;
    List       *relname_list;
 
    /* Open relation and copy the tuple description */
    relname_list = stringToQualifiedNameList(relname, NULL);
    relvar = makeRangeVarFromNameList(relname_list);
    rel = relation_openrv(relvar, AccessShareLock);
    tupdesc = CreateTupleDescCopy(RelationGetDescr(rel));
    relation_close(rel, AccessShareLock);
 
    return tupdesc;
}

References AccessShareLock, CreateTupleDescCopy(), makeRangeVarFromNameList(), relation_close(), relation_openrv(), RelationGetDescr, relname, and stringToQualifiedNameList().

resolve_anyarray_from_others()

static void resolve_anyarray_from_others ( polymorphic_actuals *  actuals )

static

Definition at line 655 of file funcapi.c.

{
    /* If we don't know ANYELEMENT, resolve that first */
    if (!OidIsValid(actuals->anyelement_type))
        resolve_anyelement_from_others(actuals);
 
    if (OidIsValid(actuals->anyelement_type))
    {
        /* Use the array type corresponding to actual type */
        Oid         array_typeid = get_array_type(actuals->anyelement_type);
 
        if (!OidIsValid(array_typeid))
            ereport(ERROR,
                    (errcode(ERRCODE_UNDEFINED_OBJECT),
                     errmsg("could not find array type for data type %s",
                            format_type_be(actuals->anyelement_type))));
        actuals->anyarray_type = array_typeid;
    }
    else
        elog(ERROR, "could not determine polymorphic type");
}

References polymorphic_actuals::anyarray_type, polymorphic_actuals::anyelement_type, elog, ereport, errcode(), errmsg(), ERROR, format_type_be(), get_array_type(), OidIsValid, and resolve_anyelement_from_others().

Referenced by resolve_polymorphic_argtypes(), and resolve_polymorphic_tupdesc().

resolve_anyelement_from_others()

static void resolve_anyelement_from_others ( polymorphic_actuals *  actuals )

static

Definition at line 589 of file funcapi.c.

{
    if (OidIsValid(actuals->anyarray_type))
    {
        /* Use the element type corresponding to actual type */
        Oid         array_base_type = getBaseType(actuals->anyarray_type);
        Oid         array_typelem = get_element_type(array_base_type);
 
        if (!OidIsValid(array_typelem))
            ereport(ERROR,
                    (errcode(ERRCODE_DATATYPE_MISMATCH),
                     errmsg("argument declared %s is not an array but type %s",
                            "anyarray",
                            format_type_be(array_base_type))));
        actuals->anyelement_type = array_typelem;
    }
    else if (OidIsValid(actuals->anyrange_type))
    {
        /* Use the element type corresponding to actual type */
        Oid         range_base_type = getBaseType(actuals->anyrange_type);
        Oid         range_typelem = get_range_subtype(range_base_type);
 
        if (!OidIsValid(range_typelem))
            ereport(ERROR,
                    (errcode(ERRCODE_DATATYPE_MISMATCH),
                     errmsg("argument declared %s is not a range type but type %s",
                            "anyrange",
                            format_type_be(range_base_type))));
        actuals->anyelement_type = range_typelem;
    }
    else if (OidIsValid(actuals->anymultirange_type))
    {
        /* Use the element type based on the multirange type */
        Oid         multirange_base_type;
        Oid         multirange_typelem;
        Oid         range_base_type;
        Oid         range_typelem;
 
        multirange_base_type = getBaseType(actuals->anymultirange_type);
        multirange_typelem = get_multirange_range(multirange_base_type);
        if (!OidIsValid(multirange_typelem))
            ereport(ERROR,
                    (errcode(ERRCODE_DATATYPE_MISMATCH),
                     errmsg("argument declared %s is not a multirange type but type %s",
                            "anymultirange",
                            format_type_be(multirange_base_type))));
 
        range_base_type = getBaseType(multirange_typelem);
        range_typelem = get_range_subtype(range_base_type);
 
        if (!OidIsValid(range_typelem))
            ereport(ERROR,
                    (errcode(ERRCODE_DATATYPE_MISMATCH),
                     errmsg("argument declared %s does not contain a range type but type %s",
                            "anymultirange",
                            format_type_be(range_base_type))));
        actuals->anyelement_type = range_typelem;
    }
    else
        elog(ERROR, "could not determine polymorphic type");
}

References polymorphic_actuals::anyarray_type, polymorphic_actuals::anyelement_type, polymorphic_actuals::anymultirange_type, polymorphic_actuals::anyrange_type, elog, ereport, errcode(), errmsg(), ERROR, format_type_be(), get_element_type(), get_multirange_range(), get_range_subtype(), getBaseType(), and OidIsValid.

Referenced by resolve_anyarray_from_others(), resolve_polymorphic_argtypes(), and resolve_polymorphic_tupdesc().

resolve_anymultirange_from_others()

static void resolve_anymultirange_from_others ( polymorphic_actuals *  actuals )

static

Definition at line 710 of file funcapi.c.

{
    /*
     * We can't deduce a multirange type from polymorphic array or base types,
     * because there may be multiple range types with the same subtype, but we
     * can deduce it from a polymorphic range type.
     */
    if (OidIsValid(actuals->anyrange_type))
    {
        Oid         range_base_type = getBaseType(actuals->anyrange_type);
        Oid         multirange_typeid = get_range_multirange(range_base_type);
 
        if (!OidIsValid(multirange_typeid))
            ereport(ERROR,
                    (errcode(ERRCODE_UNDEFINED_OBJECT),
                     errmsg("could not find multirange type for data type %s",
                            format_type_be(actuals->anyrange_type))));
        actuals->anymultirange_type = multirange_typeid;
    }
    else
        elog(ERROR, "could not determine polymorphic type");
}

References polymorphic_actuals::anymultirange_type, polymorphic_actuals::anyrange_type, elog, ereport, errcode(), errmsg(), ERROR, format_type_be(), get_range_multirange(), getBaseType(), and OidIsValid.

Referenced by resolve_polymorphic_argtypes(), and resolve_polymorphic_tupdesc().

resolve_anyrange_from_others()

static void resolve_anyrange_from_others ( polymorphic_actuals *  actuals )

static

Definition at line 681 of file funcapi.c.

{
    /*
     * We can't deduce a range type from other polymorphic array or base
     * types, because there may be multiple range types with the same subtype,
     * but we can deduce it from a polymorphic multirange type.
     */
    if (OidIsValid(actuals->anymultirange_type))
    {
        /* Use the element type based on the multirange type */
        Oid         multirange_base_type = getBaseType(actuals->anymultirange_type);
        Oid         multirange_typelem = get_multirange_range(multirange_base_type);
 
        if (!OidIsValid(multirange_typelem))
            ereport(ERROR,
                    (errcode(ERRCODE_DATATYPE_MISMATCH),
                     errmsg("argument declared %s is not a multirange type but type %s",
                            "anymultirange",
                            format_type_be(multirange_base_type))));
        actuals->anyrange_type = multirange_typelem;
    }
    else
        elog(ERROR, "could not determine polymorphic type");
}

References polymorphic_actuals::anymultirange_type, polymorphic_actuals::anyrange_type, elog, ereport, errcode(), errmsg(), ERROR, format_type_be(), get_multirange_range(), getBaseType(), and OidIsValid.

Referenced by resolve_polymorphic_argtypes(), and resolve_polymorphic_tupdesc().

resolve_polymorphic_argtypes()

bool resolve_polymorphic_argtypes	(	int	numargs,
		Oid *	argtypes,
		char *	argmodes,
		Node *	call_expr
	)

Definition at line 1064 of file funcapi.c.

{
    bool        have_polymorphic_result = false;
    bool        have_anyelement_result = false;
    bool        have_anyarray_result = false;
    bool        have_anyrange_result = false;
    bool        have_anymultirange_result = false;
    bool        have_anycompatible_result = false;
    bool        have_anycompatible_array_result = false;
    bool        have_anycompatible_range_result = false;
    bool        have_anycompatible_multirange_result = false;
    polymorphic_actuals poly_actuals;
    polymorphic_actuals anyc_actuals;
    int         inargno;
    int         i;
 
    /*
     * First pass: resolve polymorphic inputs, check for outputs.  As in
     * resolve_polymorphic_tupdesc, we rely on the parser to have enforced
     * type consistency and coerced ANYCOMPATIBLE args to a common supertype.
     */
    memset(&poly_actuals, 0, sizeof(poly_actuals));
    memset(&anyc_actuals, 0, sizeof(anyc_actuals));
    inargno = 0;
    for (i = 0; i < numargs; i++)
    {
        char        argmode = argmodes ? argmodes[i] : PROARGMODE_IN;
 
        switch (argtypes[i])
        {
            case ANYELEMENTOID:
            case ANYNONARRAYOID:
            case ANYENUMOID:
                if (argmode == PROARGMODE_OUT || argmode == PROARGMODE_TABLE)
                {
                    have_polymorphic_result = true;
                    have_anyelement_result = true;
                }
                else
                {
                    if (!OidIsValid(poly_actuals.anyelement_type))
                    {
                        poly_actuals.anyelement_type =
                            get_call_expr_argtype(call_expr, inargno);
                        if (!OidIsValid(poly_actuals.anyelement_type))
                            return false;
                    }
                    argtypes[i] = poly_actuals.anyelement_type;
                }
                break;
            case ANYARRAYOID:
                if (argmode == PROARGMODE_OUT || argmode == PROARGMODE_TABLE)
                {
                    have_polymorphic_result = true;
                    have_anyarray_result = true;
                }
                else
                {
                    if (!OidIsValid(poly_actuals.anyarray_type))
                    {
                        poly_actuals.anyarray_type =
                            get_call_expr_argtype(call_expr, inargno);
                        if (!OidIsValid(poly_actuals.anyarray_type))
                            return false;
                    }
                    argtypes[i] = poly_actuals.anyarray_type;
                }
                break;
            case ANYRANGEOID:
                if (argmode == PROARGMODE_OUT || argmode == PROARGMODE_TABLE)
                {
                    have_polymorphic_result = true;
                    have_anyrange_result = true;
                }
                else
                {
                    if (!OidIsValid(poly_actuals.anyrange_type))
                    {
                        poly_actuals.anyrange_type =
                            get_call_expr_argtype(call_expr, inargno);
                        if (!OidIsValid(poly_actuals.anyrange_type))
                            return false;
                    }
                    argtypes[i] = poly_actuals.anyrange_type;
                }
                break;
            case ANYMULTIRANGEOID:
                if (argmode == PROARGMODE_OUT || argmode == PROARGMODE_TABLE)
                {
                    have_polymorphic_result = true;
                    have_anymultirange_result = true;
                }
                else
                {
                    if (!OidIsValid(poly_actuals.anymultirange_type))
                    {
                        poly_actuals.anymultirange_type =
                            get_call_expr_argtype(call_expr, inargno);
                        if (!OidIsValid(poly_actuals.anymultirange_type))
                            return false;
                    }
                    argtypes[i] = poly_actuals.anymultirange_type;
                }
                break;
            case ANYCOMPATIBLEOID:
            case ANYCOMPATIBLENONARRAYOID:
                if (argmode == PROARGMODE_OUT || argmode == PROARGMODE_TABLE)
                {
                    have_polymorphic_result = true;
                    have_anycompatible_result = true;
                }
                else
                {
                    if (!OidIsValid(anyc_actuals.anyelement_type))
                    {
                        anyc_actuals.anyelement_type =
                            get_call_expr_argtype(call_expr, inargno);
                        if (!OidIsValid(anyc_actuals.anyelement_type))
                            return false;
                    }
                    argtypes[i] = anyc_actuals.anyelement_type;
                }
                break;
            case ANYCOMPATIBLEARRAYOID:
                if (argmode == PROARGMODE_OUT || argmode == PROARGMODE_TABLE)
                {
                    have_polymorphic_result = true;
                    have_anycompatible_array_result = true;
                }
                else
                {
                    if (!OidIsValid(anyc_actuals.anyarray_type))
                    {
                        anyc_actuals.anyarray_type =
                            get_call_expr_argtype(call_expr, inargno);
                        if (!OidIsValid(anyc_actuals.anyarray_type))
                            return false;
                    }
                    argtypes[i] = anyc_actuals.anyarray_type;
                }
                break;
            case ANYCOMPATIBLERANGEOID:
                if (argmode == PROARGMODE_OUT || argmode == PROARGMODE_TABLE)
                {
                    have_polymorphic_result = true;
                    have_anycompatible_range_result = true;
                }
                else
                {
                    if (!OidIsValid(anyc_actuals.anyrange_type))
                    {
                        anyc_actuals.anyrange_type =
                            get_call_expr_argtype(call_expr, inargno);
                        if (!OidIsValid(anyc_actuals.anyrange_type))
                            return false;
                    }
                    argtypes[i] = anyc_actuals.anyrange_type;
                }
                break;
            case ANYCOMPATIBLEMULTIRANGEOID:
                if (argmode == PROARGMODE_OUT || argmode == PROARGMODE_TABLE)
                {
                    have_polymorphic_result = true;
                    have_anycompatible_multirange_result = true;
                }
                else
                {
                    if (!OidIsValid(anyc_actuals.anymultirange_type))
                    {
                        anyc_actuals.anymultirange_type =
                            get_call_expr_argtype(call_expr, inargno);
                        if (!OidIsValid(anyc_actuals.anymultirange_type))
                            return false;
                    }
                    argtypes[i] = anyc_actuals.anymultirange_type;
                }
                break;
            default:
                break;
        }
        if (argmode != PROARGMODE_OUT && argmode != PROARGMODE_TABLE)
            inargno++;
    }
 
    /* Done? */
    if (!have_polymorphic_result)
        return true;
 
    /* If needed, deduce one polymorphic type from others */
    if (have_anyelement_result && !OidIsValid(poly_actuals.anyelement_type))
        resolve_anyelement_from_others(&poly_actuals);
 
    if (have_anyarray_result && !OidIsValid(poly_actuals.anyarray_type))
        resolve_anyarray_from_others(&poly_actuals);
 
    if (have_anyrange_result && !OidIsValid(poly_actuals.anyrange_type))
        resolve_anyrange_from_others(&poly_actuals);
 
    if (have_anymultirange_result && !OidIsValid(poly_actuals.anymultirange_type))
        resolve_anymultirange_from_others(&poly_actuals);
 
    if (have_anycompatible_result && !OidIsValid(anyc_actuals.anyelement_type))
        resolve_anyelement_from_others(&anyc_actuals);
 
    if (have_anycompatible_array_result && !OidIsValid(anyc_actuals.anyarray_type))
        resolve_anyarray_from_others(&anyc_actuals);
 
    if (have_anycompatible_range_result && !OidIsValid(anyc_actuals.anyrange_type))
        resolve_anyrange_from_others(&anyc_actuals);
 
    if (have_anycompatible_multirange_result && !OidIsValid(anyc_actuals.anymultirange_type))
        resolve_anymultirange_from_others(&anyc_actuals);
 
    /* And finally replace the output column types as needed */
    for (i = 0; i < numargs; i++)
    {
        switch (argtypes[i])
        {
            case ANYELEMENTOID:
            case ANYNONARRAYOID:
            case ANYENUMOID:
                argtypes[i] = poly_actuals.anyelement_type;
                break;
            case ANYARRAYOID:
                argtypes[i] = poly_actuals.anyarray_type;
                break;
            case ANYRANGEOID:
                argtypes[i] = poly_actuals.anyrange_type;
                break;
            case ANYMULTIRANGEOID:
                argtypes[i] = poly_actuals.anymultirange_type;
                break;
            case ANYCOMPATIBLEOID:
            case ANYCOMPATIBLENONARRAYOID:
                argtypes[i] = anyc_actuals.anyelement_type;
                break;
            case ANYCOMPATIBLEARRAYOID:
                argtypes[i] = anyc_actuals.anyarray_type;
                break;
            case ANYCOMPATIBLERANGEOID:
                argtypes[i] = anyc_actuals.anyrange_type;
                break;
            case ANYCOMPATIBLEMULTIRANGEOID:
                argtypes[i] = anyc_actuals.anymultirange_type;
                break;
            default:
                break;
        }
    }
 
    return true;
}

References polymorphic_actuals::anyarray_type, polymorphic_actuals::anyelement_type, polymorphic_actuals::anymultirange_type, polymorphic_actuals::anyrange_type, get_call_expr_argtype(), i, OidIsValid, resolve_anyarray_from_others(), resolve_anyelement_from_others(), resolve_anymultirange_from_others(), and resolve_anyrange_from_others().

Referenced by cfunc_resolve_polymorphic_argtypes().

resolve_polymorphic_tupdesc()

static bool resolve_polymorphic_tupdesc ( TupleDesc  tupdesc, oidvector *  declared_args, Node *  call_expr  )

static

Definition at line 744 of file funcapi.c.

{
    int         natts = tupdesc->natts;
    int         nargs = declared_args->dim1;
    bool        have_polymorphic_result = false;
    bool        have_anyelement_result = false;
    bool        have_anyarray_result = false;
    bool        have_anyrange_result = false;
    bool        have_anymultirange_result = false;
    bool        have_anycompatible_result = false;
    bool        have_anycompatible_array_result = false;
    bool        have_anycompatible_range_result = false;
    bool        have_anycompatible_multirange_result = false;
    polymorphic_actuals poly_actuals;
    polymorphic_actuals anyc_actuals;
    Oid         anycollation = InvalidOid;
    Oid         anycompatcollation = InvalidOid;
    int         i;
 
    /* See if there are any polymorphic outputs; quick out if not */
    for (i = 0; i < natts; i++)
    {
        switch (TupleDescAttr(tupdesc, i)->atttypid)
        {
            case ANYELEMENTOID:
            case ANYNONARRAYOID:
            case ANYENUMOID:
                have_polymorphic_result = true;
                have_anyelement_result = true;
                break;
            case ANYARRAYOID:
                have_polymorphic_result = true;
                have_anyarray_result = true;
                break;
            case ANYRANGEOID:
                have_polymorphic_result = true;
                have_anyrange_result = true;
                break;
            case ANYMULTIRANGEOID:
                have_polymorphic_result = true;
                have_anymultirange_result = true;
                break;
            case ANYCOMPATIBLEOID:
            case ANYCOMPATIBLENONARRAYOID:
                have_polymorphic_result = true;
                have_anycompatible_result = true;
                break;
            case ANYCOMPATIBLEARRAYOID:
                have_polymorphic_result = true;
                have_anycompatible_array_result = true;
                break;
            case ANYCOMPATIBLERANGEOID:
                have_polymorphic_result = true;
                have_anycompatible_range_result = true;
                break;
            case ANYCOMPATIBLEMULTIRANGEOID:
                have_polymorphic_result = true;
                have_anycompatible_multirange_result = true;
                break;
            default:
                break;
        }
    }
    if (!have_polymorphic_result)
        return true;
 
    /*
     * Otherwise, extract actual datatype(s) from input arguments.  (We assume
     * the parser already validated consistency of the arguments.  Also, for
     * the ANYCOMPATIBLE pseudotype family, we expect that all matching
     * arguments were coerced to the selected common supertype, so that it
     * doesn't matter which one's exposed type we look at.)
     */
    if (!call_expr)
        return false;           /* no hope */
 
    memset(&poly_actuals, 0, sizeof(poly_actuals));
    memset(&anyc_actuals, 0, sizeof(anyc_actuals));
 
    for (i = 0; i < nargs; i++)
    {
        switch (declared_args->values[i])
        {
            case ANYELEMENTOID:
            case ANYNONARRAYOID:
            case ANYENUMOID:
                if (!OidIsValid(poly_actuals.anyelement_type))
                {
                    poly_actuals.anyelement_type =
                        get_call_expr_argtype(call_expr, i);
                    if (!OidIsValid(poly_actuals.anyelement_type))
                        return false;
                }
                break;
            case ANYARRAYOID:
                if (!OidIsValid(poly_actuals.anyarray_type))
                {
                    poly_actuals.anyarray_type =
                        get_call_expr_argtype(call_expr, i);
                    if (!OidIsValid(poly_actuals.anyarray_type))
                        return false;
                }
                break;
            case ANYRANGEOID:
                if (!OidIsValid(poly_actuals.anyrange_type))
                {
                    poly_actuals.anyrange_type =
                        get_call_expr_argtype(call_expr, i);
                    if (!OidIsValid(poly_actuals.anyrange_type))
                        return false;
                }
                break;
            case ANYMULTIRANGEOID:
                if (!OidIsValid(poly_actuals.anymultirange_type))
                {
                    poly_actuals.anymultirange_type =
                        get_call_expr_argtype(call_expr, i);
                    if (!OidIsValid(poly_actuals.anymultirange_type))
                        return false;
                }
                break;
            case ANYCOMPATIBLEOID:
            case ANYCOMPATIBLENONARRAYOID:
                if (!OidIsValid(anyc_actuals.anyelement_type))
                {
                    anyc_actuals.anyelement_type =
                        get_call_expr_argtype(call_expr, i);
                    if (!OidIsValid(anyc_actuals.anyelement_type))
                        return false;
                }
                break;
            case ANYCOMPATIBLEARRAYOID:
                if (!OidIsValid(anyc_actuals.anyarray_type))
                {
                    anyc_actuals.anyarray_type =
                        get_call_expr_argtype(call_expr, i);
                    if (!OidIsValid(anyc_actuals.anyarray_type))
                        return false;
                }
                break;
            case ANYCOMPATIBLERANGEOID:
                if (!OidIsValid(anyc_actuals.anyrange_type))
                {
                    anyc_actuals.anyrange_type =
                        get_call_expr_argtype(call_expr, i);
                    if (!OidIsValid(anyc_actuals.anyrange_type))
                        return false;
                }
                break;
            case ANYCOMPATIBLEMULTIRANGEOID:
                if (!OidIsValid(anyc_actuals.anymultirange_type))
                {
                    anyc_actuals.anymultirange_type =
                        get_call_expr_argtype(call_expr, i);
                    if (!OidIsValid(anyc_actuals.anymultirange_type))
                        return false;
                }
                break;
            default:
                break;
        }
    }
 
    /* If needed, deduce one polymorphic type from others */
    if (have_anyelement_result && !OidIsValid(poly_actuals.anyelement_type))
        resolve_anyelement_from_others(&poly_actuals);
 
    if (have_anyarray_result && !OidIsValid(poly_actuals.anyarray_type))
        resolve_anyarray_from_others(&poly_actuals);
 
    if (have_anyrange_result && !OidIsValid(poly_actuals.anyrange_type))
        resolve_anyrange_from_others(&poly_actuals);
 
    if (have_anymultirange_result && !OidIsValid(poly_actuals.anymultirange_type))
        resolve_anymultirange_from_others(&poly_actuals);
 
    if (have_anycompatible_result && !OidIsValid(anyc_actuals.anyelement_type))
        resolve_anyelement_from_others(&anyc_actuals);
 
    if (have_anycompatible_array_result && !OidIsValid(anyc_actuals.anyarray_type))
        resolve_anyarray_from_others(&anyc_actuals);
 
    if (have_anycompatible_range_result && !OidIsValid(anyc_actuals.anyrange_type))
        resolve_anyrange_from_others(&anyc_actuals);
 
    if (have_anycompatible_multirange_result && !OidIsValid(anyc_actuals.anymultirange_type))
        resolve_anymultirange_from_others(&anyc_actuals);
 
    /*
     * Identify the collation to use for polymorphic OUT parameters. (It'll
     * necessarily be the same for both anyelement and anyarray, likewise for
     * anycompatible and anycompatiblearray.)  Note that range types are not
     * collatable, so any possible internal collation of a range type is not
     * considered here.
     */
    if (OidIsValid(poly_actuals.anyelement_type))
        anycollation = get_typcollation(poly_actuals.anyelement_type);
    else if (OidIsValid(poly_actuals.anyarray_type))
        anycollation = get_typcollation(poly_actuals.anyarray_type);
 
    if (OidIsValid(anyc_actuals.anyelement_type))
        anycompatcollation = get_typcollation(anyc_actuals.anyelement_type);
    else if (OidIsValid(anyc_actuals.anyarray_type))
        anycompatcollation = get_typcollation(anyc_actuals.anyarray_type);
 
    if (OidIsValid(anycollation) || OidIsValid(anycompatcollation))
    {
        /*
         * The types are collatable, so consider whether to use a nondefault
         * collation.  We do so if we can identify the input collation used
         * for the function.
         */
        Oid         inputcollation = exprInputCollation(call_expr);
 
        if (OidIsValid(inputcollation))
        {
            if (OidIsValid(anycollation))
                anycollation = inputcollation;
            if (OidIsValid(anycompatcollation))
                anycompatcollation = inputcollation;
        }
    }
 
    /* And finally replace the tuple column types as needed */
    for (i = 0; i < natts; i++)
    {
        Form_pg_attribute att = TupleDescAttr(tupdesc, i);
 
        switch (att->atttypid)
        {
            case ANYELEMENTOID:
            case ANYNONARRAYOID:
            case ANYENUMOID:
                TupleDescInitEntry(tupdesc, i + 1,
                                   NameStr(att->attname),
                                   poly_actuals.anyelement_type,
                                   -1,
                                   0);
                TupleDescInitEntryCollation(tupdesc, i + 1, anycollation);
                break;
            case ANYARRAYOID:
                TupleDescInitEntry(tupdesc, i + 1,
                                   NameStr(att->attname),
                                   poly_actuals.anyarray_type,
                                   -1,
                                   0);
                TupleDescInitEntryCollation(tupdesc, i + 1, anycollation);
                break;
            case ANYRANGEOID:
                TupleDescInitEntry(tupdesc, i + 1,
                                   NameStr(att->attname),
                                   poly_actuals.anyrange_type,
                                   -1,
                                   0);
                /* no collation should be attached to a range type */
                break;
            case ANYMULTIRANGEOID:
                TupleDescInitEntry(tupdesc, i + 1,
                                   NameStr(att->attname),
                                   poly_actuals.anymultirange_type,
                                   -1,
                                   0);
                /* no collation should be attached to a multirange type */
                break;
            case ANYCOMPATIBLEOID:
            case ANYCOMPATIBLENONARRAYOID:
                TupleDescInitEntry(tupdesc, i + 1,
                                   NameStr(att->attname),
                                   anyc_actuals.anyelement_type,
                                   -1,
                                   0);
                TupleDescInitEntryCollation(tupdesc, i + 1, anycompatcollation);
                break;
            case ANYCOMPATIBLEARRAYOID:
                TupleDescInitEntry(tupdesc, i + 1,
                                   NameStr(att->attname),
                                   anyc_actuals.anyarray_type,
                                   -1,
                                   0);
                TupleDescInitEntryCollation(tupdesc, i + 1, anycompatcollation);
                break;
            case ANYCOMPATIBLERANGEOID:
                TupleDescInitEntry(tupdesc, i + 1,
                                   NameStr(att->attname),
                                   anyc_actuals.anyrange_type,
                                   -1,
                                   0);
                /* no collation should be attached to a range type */
                break;
            case ANYCOMPATIBLEMULTIRANGEOID:
                TupleDescInitEntry(tupdesc, i + 1,
                                   NameStr(att->attname),
                                   anyc_actuals.anymultirange_type,
                                   -1,
                                   0);
                /* no collation should be attached to a multirange type */
                break;
            default:
                break;
        }
    }
 
    return true;
}

References polymorphic_actuals::anyarray_type, polymorphic_actuals::anyelement_type, polymorphic_actuals::anymultirange_type, polymorphic_actuals::anyrange_type, oidvector::dim1, exprInputCollation(), get_call_expr_argtype(), get_typcollation(), i, InvalidOid, NameStr, TupleDescData::natts, OidIsValid, resolve_anyarray_from_others(), resolve_anyelement_from_others(), resolve_anymultirange_from_others(), resolve_anyrange_from_others(), TupleDescAttr(), TupleDescInitEntry(), TupleDescInitEntryCollation(), and oidvector::values.

Referenced by internal_get_result_type().

shutdown_MultiFuncCall()

static void shutdown_MultiFuncCall ( Datum  arg )

static

Definition at line 238 of file funcapi.c.

{
    FmgrInfo   *flinfo = (FmgrInfo *) DatumGetPointer(arg);
    FuncCallContext *funcctx = (FuncCallContext *) flinfo->fn_extra;
 
    /* unbind from flinfo */
    flinfo->fn_extra = NULL;
 
    /*
     * Delete context that holds all multi-call data, including the
     * FuncCallContext itself
     */
    MemoryContextDelete(funcctx->multi_call_memory_ctx);
}

References arg, DatumGetPointer(), FmgrInfo::fn_extra, MemoryContextDelete(), and FuncCallContext::multi_call_memory_ctx.

Referenced by end_MultiFuncCall(), and init_MultiFuncCall().

TypeGetTupleDesc()

TupleDesc TypeGetTupleDesc	(	Oid	typeoid,
		List *	colaliases
	)

Definition at line 1903 of file funcapi.c.

{
    Oid         base_typeoid;
    TypeFuncClass functypclass = get_type_func_class(typeoid, &base_typeoid);
    TupleDesc   tupdesc = NULL;
 
    /*
     * Build a suitable tupledesc representing the output rows.  We
     * intentionally do not support TYPEFUNC_COMPOSITE_DOMAIN here, as it's
     * unlikely that legacy callers of this obsolete function would be
     * prepared to apply domain constraints.
     */
    if (functypclass == TYPEFUNC_COMPOSITE)
    {
        /* Composite data type, e.g. a table's row type */
        tupdesc = lookup_rowtype_tupdesc_copy(base_typeoid, -1);
 
        if (colaliases != NIL)
        {
            int         natts = tupdesc->natts;
            int         varattno;
 
            /* does the list length match the number of attributes? */
            if (list_length(colaliases) != natts)
                ereport(ERROR,
                        (errcode(ERRCODE_DATATYPE_MISMATCH),
                         errmsg("number of aliases does not match number of columns")));
 
            /* OK, use the aliases instead */
            for (varattno = 0; varattno < natts; varattno++)
            {
                char       *label = strVal(list_nth(colaliases, varattno));
                Form_pg_attribute attr = TupleDescAttr(tupdesc, varattno);
 
                if (label != NULL)
                    namestrcpy(&(attr->attname), label);
            }
 
            /* The tuple type is now an anonymous record type */
            tupdesc->tdtypeid = RECORDOID;
            tupdesc->tdtypmod = -1;
        }
    }
    else if (functypclass == TYPEFUNC_SCALAR)
    {
        /* Base data type, i.e. scalar */
        char       *attname;
 
        /* the alias list is required for base types */
        if (colaliases == NIL)
            ereport(ERROR,
                    (errcode(ERRCODE_DATATYPE_MISMATCH),
                     errmsg("no column alias was provided")));
 
        /* the alias list length must be 1 */
        if (list_length(colaliases) != 1)
            ereport(ERROR,
                    (errcode(ERRCODE_DATATYPE_MISMATCH),
                     errmsg("number of aliases does not match number of columns")));
 
        /* OK, get the column alias */
        attname = strVal(linitial(colaliases));
 
        tupdesc = CreateTemplateTupleDesc(1);
        TupleDescInitEntry(tupdesc,
                           (AttrNumber) 1,
                           attname,
                           typeoid,
                           -1,
                           0);
    }
    else if (functypclass == TYPEFUNC_RECORD)
    {
        /* XXX can't support this because typmod wasn't passed in ... */
        ereport(ERROR,
                (errcode(ERRCODE_DATATYPE_MISMATCH),
                 errmsg("could not determine row description for function returning record")));
    }
    else
    {
        /* crummy error message, but parser should have caught this */
        elog(ERROR, "function in FROM has unsupported return type");
    }
 
    return tupdesc;
}

References attname, CreateTemplateTupleDesc(), elog, ereport, errcode(), errmsg(), ERROR, get_type_func_class(), label, linitial, list_length(), list_nth(), lookup_rowtype_tupdesc_copy(), namestrcpy(), TupleDescData::natts, NIL, strVal, TupleDescData::tdtypeid, TupleDescData::tdtypmod, TupleDescAttr(), TupleDescInitEntry(), TYPEFUNC_COMPOSITE, TYPEFUNC_RECORD, and TYPEFUNC_SCALAR.