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db_include/catalog/pg_aggregate.h
Executable file
181
db_include/catalog/pg_aggregate.h
Executable file
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/*-------------------------------------------------------------------------
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*
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* pg_aggregate.h
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* definition of the "aggregate" system catalog (pg_aggregate)
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*
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*
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* Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/catalog/pg_aggregate.h
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*
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* NOTES
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* The Catalog.pm module reads this file and derives schema
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* information.
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PG_AGGREGATE_H
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#define PG_AGGREGATE_H
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#include "catalog/genbki.h"
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#include "catalog/pg_aggregate_d.h"
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#include "catalog/objectaddress.h"
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#include "nodes/pg_list.h"
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/* ----------------------------------------------------------------
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* pg_aggregate definition.
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* cpp turns this into typedef struct FormData_pg_aggregate
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* ----------------------------------------------------------------
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*/
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CATALOG(pg_aggregate,2600,AggregateRelationId)
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{
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/* pg_proc OID of the aggregate itself */
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regproc aggfnoid BKI_LOOKUP(pg_proc);
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/* aggregate kind, see AGGKIND_ categories below */
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char aggkind BKI_DEFAULT(n);
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/* number of arguments that are "direct" arguments */
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int16 aggnumdirectargs BKI_DEFAULT(0);
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/* transition function */
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regproc aggtransfn BKI_LOOKUP(pg_proc);
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/* final function (0 if none) */
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regproc aggfinalfn BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
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/* combine function (0 if none) */
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regproc aggcombinefn BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
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/* function to convert transtype to bytea (0 if none) */
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regproc aggserialfn BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
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/* function to convert bytea to transtype (0 if none) */
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regproc aggdeserialfn BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
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/* forward function for moving-aggregate mode (0 if none) */
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regproc aggmtransfn BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
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/* inverse function for moving-aggregate mode (0 if none) */
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regproc aggminvtransfn BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
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/* final function for moving-aggregate mode (0 if none) */
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regproc aggmfinalfn BKI_DEFAULT(-) BKI_LOOKUP_OPT(pg_proc);
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/* true to pass extra dummy arguments to aggfinalfn */
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bool aggfinalextra BKI_DEFAULT(f);
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/* true to pass extra dummy arguments to aggmfinalfn */
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bool aggmfinalextra BKI_DEFAULT(f);
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/* tells whether aggfinalfn modifies transition state */
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char aggfinalmodify BKI_DEFAULT(r);
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/* tells whether aggmfinalfn modifies transition state */
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char aggmfinalmodify BKI_DEFAULT(r);
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/* associated sort operator (0 if none) */
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Oid aggsortop BKI_DEFAULT(0) BKI_LOOKUP_OPT(pg_operator);
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/* type of aggregate's transition (state) data */
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Oid aggtranstype BKI_LOOKUP(pg_type);
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/* estimated size of state data (0 for default estimate) */
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int32 aggtransspace BKI_DEFAULT(0);
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/* type of moving-aggregate state data (0 if none) */
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Oid aggmtranstype BKI_DEFAULT(0) BKI_LOOKUP_OPT(pg_type);
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/* estimated size of moving-agg state (0 for default est) */
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int32 aggmtransspace BKI_DEFAULT(0);
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#ifdef CATALOG_VARLEN /* variable-length fields start here */
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/* initial value for transition state (can be NULL) */
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text agginitval BKI_DEFAULT(_null_);
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/* initial value for moving-agg state (can be NULL) */
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text aggminitval BKI_DEFAULT(_null_);
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#endif
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} FormData_pg_aggregate;
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/* ----------------
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* Form_pg_aggregate corresponds to a pointer to a tuple with
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* the format of pg_aggregate relation.
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* ----------------
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*/
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typedef FormData_pg_aggregate *Form_pg_aggregate;
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DECLARE_TOAST(pg_aggregate, 4159, 4160);
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DECLARE_UNIQUE_INDEX_PKEY(pg_aggregate_fnoid_index, 2650, on pg_aggregate using btree(aggfnoid oid_ops));
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#define AggregateFnoidIndexId 2650
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#ifdef EXPOSE_TO_CLIENT_CODE
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/*
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* Symbolic values for aggkind column. We distinguish normal aggregates
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* from ordered-set aggregates (which have two sets of arguments, namely
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* direct and aggregated arguments) and from hypothetical-set aggregates
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* (which are a subclass of ordered-set aggregates in which the last
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* direct arguments have to match up in number and datatypes with the
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* aggregated arguments).
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*/
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#define AGGKIND_NORMAL 'n'
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#define AGGKIND_ORDERED_SET 'o'
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#define AGGKIND_HYPOTHETICAL 'h'
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/* Use this macro to test for "ordered-set agg including hypothetical case" */
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#define AGGKIND_IS_ORDERED_SET(kind) ((kind) != AGGKIND_NORMAL)
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/*
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* Symbolic values for aggfinalmodify and aggmfinalmodify columns.
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* Preferably, finalfns do not modify the transition state value at all,
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* but in some cases that would cost too much performance. We distinguish
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* "pure read only" and "trashes it arbitrarily" cases, as well as the
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* intermediate case where multiple finalfn calls are allowed but the
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* transfn cannot be applied anymore after the first finalfn call.
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*/
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#define AGGMODIFY_READ_ONLY 'r'
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#define AGGMODIFY_SHAREABLE 's'
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#define AGGMODIFY_READ_WRITE 'w'
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#endif /* EXPOSE_TO_CLIENT_CODE */
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extern ObjectAddress AggregateCreate(const char *aggName,
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Oid aggNamespace,
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bool replace,
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char aggKind,
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int numArgs,
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int numDirectArgs,
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oidvector *parameterTypes,
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Datum allParameterTypes,
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Datum parameterModes,
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Datum parameterNames,
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List *parameterDefaults,
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Oid variadicArgType,
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List *aggtransfnName,
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List *aggfinalfnName,
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List *aggcombinefnName,
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List *aggserialfnName,
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List *aggdeserialfnName,
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List *aggmtransfnName,
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List *aggminvtransfnName,
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List *aggmfinalfnName,
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bool finalfnExtraArgs,
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bool mfinalfnExtraArgs,
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char finalfnModify,
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char mfinalfnModify,
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List *aggsortopName,
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Oid aggTransType,
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int32 aggTransSpace,
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Oid aggmTransType,
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int32 aggmTransSpace,
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const char *agginitval,
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const char *aggminitval,
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char proparallel);
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#endif /* PG_AGGREGATE_H */
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