pg_proc.h

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/*-------------------------------------------------------------------------
 *
 * pg_proc.h
 *    definition of the "procedure" system catalog (pg_proc)
 *
 * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/catalog/pg_proc.h
 *
 * NOTES
 *    The Catalog.pm module reads this file and derives schema
 *    information.
 *
 *-------------------------------------------------------------------------
 */
#ifndef PG_PROC_H
#define PG_PROC_H

#include "catalog/genbki.h"
#include "catalog/objectaddress.h"
#include "catalog/pg_proc_d.h"
#include "nodes/pg_list.h"

/* ----------------
 *      pg_proc definition.  cpp turns this into
 *      typedef struct FormData_pg_proc
 * ----------------
 */
CATALOG(pg_proc,1255,ProcedureRelationId) BKI_BOOTSTRAP BKI_ROWTYPE_OID(81,ProcedureRelation_Rowtype_Id) BKI_SCHEMA_MACRO
{
    Oid         oid;            /* oid */

    /* procedure name */
    NameData    proname;

    /* OID of namespace containing this proc */
    Oid         pronamespace BKI_DEFAULT(PGNSP);

    /* procedure owner */
    Oid         proowner BKI_DEFAULT(PGUID);

    /* OID of pg_language entry */
    Oid         prolang BKI_DEFAULT(internal) BKI_LOOKUP(pg_language);

    /* estimated execution cost */
    float4      procost BKI_DEFAULT(1);

    /* estimated # of rows out (if proretset) */
    float4      prorows BKI_DEFAULT(0);

    /* element type of variadic array, or 0 */
    Oid         provariadic BKI_DEFAULT(0) BKI_LOOKUP(pg_type);

    /* planner support function for this function, or 0 if none */
    regproc     prosupport BKI_DEFAULT(0) BKI_LOOKUP(pg_proc);

    /* see PROKIND_ categories below */
    char        prokind BKI_DEFAULT(f);

    /* security definer */
    bool        prosecdef BKI_DEFAULT(f);

    /* is it a leak-proof function? */
    bool        proleakproof BKI_DEFAULT(f);

    /* strict with respect to NULLs? */
    bool        proisstrict BKI_DEFAULT(t);

    /* returns a set? */
    bool        proretset BKI_DEFAULT(f);

    /* see PROVOLATILE_ categories below */
    char        provolatile BKI_DEFAULT(i);

    /* see PROPARALLEL_ categories below */
    char        proparallel BKI_DEFAULT(s);

    /* number of arguments */
    /* Note: need not be given in pg_proc.dat; genbki.pl will compute it */
    int16       pronargs;

    /* number of arguments with defaults */
    int16       pronargdefaults BKI_DEFAULT(0);

    /* OID of result type */
    Oid         prorettype BKI_LOOKUP(pg_type);

    /*
     * variable-length fields start here, but we allow direct access to
     * proargtypes
     */

    /* parameter types (excludes OUT params of functions) */
    oidvector   proargtypes BKI_LOOKUP(pg_type) BKI_FORCE_NOT_NULL;

#ifdef CATALOG_VARLEN

    /* all param types (NULL if IN only) */
    Oid         proallargtypes[1] BKI_DEFAULT(_null_) BKI_LOOKUP(pg_type);

    /* parameter modes (NULL if IN only) */
    char        proargmodes[1] BKI_DEFAULT(_null_);

    /* parameter names (NULL if no names) */
    text        proargnames[1] BKI_DEFAULT(_null_);

    /* list of expression trees for argument defaults (NULL if none) */
    pg_node_tree proargdefaults BKI_DEFAULT(_null_);

    /* types for which to apply transforms */
    Oid         protrftypes[1] BKI_DEFAULT(_null_);

    /* procedure source text */
    text        prosrc BKI_FORCE_NOT_NULL;

    /* secondary procedure info (can be NULL) */
    text        probin BKI_DEFAULT(_null_);

    /* procedure-local GUC settings */
    text        proconfig[1] BKI_DEFAULT(_null_);

    /* access permissions */
    aclitem     proacl[1] BKI_DEFAULT(_null_);
#endif
} FormData_pg_proc;

/* ----------------
 *      Form_pg_proc corresponds to a pointer to a tuple with
 *      the format of pg_proc relation.
 * ----------------
 */
typedef FormData_pg_proc *Form_pg_proc;

#ifdef EXPOSE_TO_CLIENT_CODE

/*
 * Symbolic values for prokind column
 */
#define PROKIND_FUNCTION 'f'
#define PROKIND_AGGREGATE 'a'
#define PROKIND_WINDOW 'w'
#define PROKIND_PROCEDURE 'p'

/*
 * Symbolic values for provolatile column: these indicate whether the result
 * of a function is dependent *only* on the values of its explicit arguments,
 * or can change due to outside factors (such as parameter variables or
 * table contents).  NOTE: functions having side-effects, such as setval(),
 * must be labeled volatile to ensure they will not get optimized away,
 * even if the actual return value is not changeable.
 */
#define PROVOLATILE_IMMUTABLE   'i' /* never changes for given input */
#define PROVOLATILE_STABLE      's' /* does not change within a scan */
#define PROVOLATILE_VOLATILE    'v' /* can change even within a scan */

/*
 * Symbolic values for proparallel column: these indicate whether a function
 * can be safely be run in a parallel backend, during parallelism but
 * necessarily in the leader, or only in non-parallel mode.
 */
#define PROPARALLEL_SAFE        's' /* can run in worker or leader */
#define PROPARALLEL_RESTRICTED  'r' /* can run in parallel leader only */
#define PROPARALLEL_UNSAFE      'u' /* banned while in parallel mode */

/*
 * Symbolic values for proargmodes column.  Note that these must agree with
 * the FunctionParameterMode enum in parsenodes.h; we declare them here to
 * be accessible from either header.
 */
#define PROARGMODE_IN       'i'
#define PROARGMODE_OUT      'o'
#define PROARGMODE_INOUT    'b'
#define PROARGMODE_VARIADIC 'v'
#define PROARGMODE_TABLE    't'

#endif                          /* EXPOSE_TO_CLIENT_CODE */


extern ObjectAddress ProcedureCreate(const char *procedureName,
                                     Oid procNamespace,
                                     bool replace,
                                     bool returnsSet,
                                     Oid returnType,
                                     Oid proowner,
                                     Oid languageObjectId,
                                     Oid languageValidator,
                                     const char *prosrc,
                                     const char *probin,
                                     char prokind,
                                     bool security_definer,
                                     bool isLeakProof,
                                     bool isStrict,
                                     char volatility,
                                     char parallel,
                                     oidvector *parameterTypes,
                                     Datum allParameterTypes,
                                     Datum parameterModes,
                                     Datum parameterNames,
                                     List *parameterDefaults,
                                     Datum trftypes,
                                     Datum proconfig,
                                     Oid prosupport,
                                     float4 procost,
                                     float4 prorows);

extern bool function_parse_error_transpose(const char *prosrc);

extern List *oid_array_to_list(Datum datum);

#endif                          /* PG_PROC_H */