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/*-------------------------------------------------------------------------
*
* pg_aggregate.h
* definition of the "aggregate" system catalog (pg_aggregate)
*
*
* Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/catalog/pg_aggregate.h
*
* NOTES
* The Catalog.pm module reads this file and derives schema
* information.
*
*-------------------------------------------------------------------------
*/
#ifndef PG_AGGREGATE_H
#define PG_AGGREGATE_H
#include "catalog/genbki.h"
#include "catalog/pg_aggregate_d.h"
#include "catalog/objectaddress.h"
#include "nodes/pg_list.h"
/* ----------------------------------------------------------------
* pg_aggregate definition.
* cpp turns this into typedef struct FormData_pg_aggregate
* ----------------------------------------------------------------
*/
CATALOG(pg_aggregate,2600,AggregateRelationId)
{
/* pg_proc OID of the aggregate itself */
regproc aggfnoid BKI_LOOKUP(pg_proc);
/* aggregate kind, see AGGKIND_ categories below */
char aggkind BKI_DEFAULT(n);
/* number of arguments that are "direct" arguments */
int16 aggnumdirectargs BKI_DEFAULT(0);
/* transition function */
regproc aggtransfn BKI_LOOKUP(pg_proc);
/* final function (0 if none) */
regproc aggfinalfn BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
/* combine function (0 if none) */
regproc aggcombinefn BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
/* function to convert transtype to bytea (0 if none) */
regproc aggserialfn BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
/* function to convert bytea to transtype (0 if none) */
regproc aggdeserialfn BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
/* forward function for moving-aggregate mode (0 if none) */
regproc aggmtransfn BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
/* inverse function for moving-aggregate mode (0 if none) */
regproc aggminvtransfn BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
/* final function for moving-aggregate mode (0 if none) */
regproc aggmfinalfn BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
/* true to pass extra dummy arguments to aggfinalfn */
bool aggfinalextra BKI_DEFAULT(f);
/* true to pass extra dummy arguments to aggmfinalfn */
bool aggmfinalextra BKI_DEFAULT(f);
/* tells whether aggfinalfn modifies transition state */
char aggfinalmodify BKI_DEFAULT(r);
/* tells whether aggmfinalfn modifies transition state */
char aggmfinalmodify BKI_DEFAULT(r);
/* associated sort operator (0 if none) */
Oid aggsortop BKI_DEFAULT(0) BKI_LOOKUP_OPT(pg_operator);
/* type of aggregate's transition (state) data */
Oid aggtranstype BKI_LOOKUP(pg_type);
/* estimated size of state data (0 for default estimate) */
int32 aggtransspace BKI_DEFAULT(0);
/* type of moving-aggregate state data (0 if none) */
Oid aggmtranstype BKI_DEFAULT(0) BKI_LOOKUP_OPT(pg_type);
/* estimated size of moving-agg state (0 for default est) */
int32 aggmtransspace BKI_DEFAULT(0);
#ifdef CATALOG_VARLEN /* variable-length fields start here */
/* initial value for transition state (can be NULL) */
text agginitval BKI_DEFAULT(_null_);
/* initial value for moving-agg state (can be NULL) */
text aggminitval BKI_DEFAULT(_null_);
#endif
} FormData_pg_aggregate;
/* ----------------
* Form_pg_aggregate corresponds to a pointer to a tuple with
* the format of pg_aggregate relation.
* ----------------
*/
typedef FormData_pg_aggregate *Form_pg_aggregate;
DECLARE_TOAST(pg_aggregate, 4159, 4160);
DECLARE_UNIQUE_INDEX_PKEY(pg_aggregate_fnoid_index, 2650, on pg_aggregate using btree(aggfnoid oid_ops));
#define AggregateFnoidIndexId 2650
#ifdef EXPOSE_TO_CLIENT_CODE
/*
* Symbolic values for aggkind column. We distinguish normal aggregates
* from ordered-set aggregates (which have two sets of arguments, namely
* direct and aggregated arguments) and from hypothetical-set aggregates
* (which are a subclass of ordered-set aggregates in which the last
* direct arguments have to match up in number and datatypes with the
* aggregated arguments).
*/
#define AGGKIND_NORMAL 'n'
#define AGGKIND_ORDERED_SET 'o'
#define AGGKIND_HYPOTHETICAL 'h'
/* Use this macro to test for "ordered-set agg including hypothetical case" */
#define AGGKIND_IS_ORDERED_SET(kind) ((kind) != AGGKIND_NORMAL)
/*
* Symbolic values for aggfinalmodify and aggmfinalmodify columns.
* Preferably, finalfns do not modify the transition state value at all,
* but in some cases that would cost too much performance. We distinguish
* "pure read only" and "trashes it arbitrarily" cases, as well as the
* intermediate case where multiple finalfn calls are allowed but the
* transfn cannot be applied anymore after the first finalfn call.
*/
#define AGGMODIFY_READ_ONLY 'r'
#define AGGMODIFY_SHAREABLE 's'
#define AGGMODIFY_READ_WRITE 'w'
#endif /* EXPOSE_TO_CLIENT_CODE */
extern ObjectAddress AggregateCreate(const char *aggName,
Oid aggNamespace,
bool replace,
char aggKind,
int numArgs,
int numDirectArgs,
oidvector *parameterTypes,
Datum allParameterTypes,
Datum parameterModes,
Datum parameterNames,
List *parameterDefaults,
Oid variadicArgType,
List *aggtransfnName,
List *aggfinalfnName,
List *aggcombinefnName,
List *aggserialfnName,
List *aggdeserialfnName,
List *aggmtransfnName,
List *aggminvtransfnName,
List *aggmfinalfnName,
bool finalfnExtraArgs,
bool mfinalfnExtraArgs,
char finalfnModify,
char mfinalfnModify,
List *aggsortopName,
Oid aggTransType,
int32 aggTransSpace,
Oid aggmTransType,
int32 aggmTransSpace,
const char *agginitval,
const char *aggminitval,
char proparallel);
#endif /* PG_AGGREGATE_H */
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