parse_agg.h

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/*-------------------------------------------------------------------------
 *
 * parse_agg.h
 *    handle aggregates and window functions in parser
 *
 * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/parser/parse_agg.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef PARSE_AGG_H
#define PARSE_AGG_H

#include "parser/parse_node.h"

extern void transformAggregateCall(ParseState *pstate, Aggref *agg,
                                   List *args, List *aggorder,
                                   bool agg_distinct);

extern Node *transformGroupingFunc(ParseState *pstate, GroupingFunc *g);

extern void transformWindowFuncCall(ParseState *pstate, WindowFunc *wfunc,
                                    WindowDef *windef);

extern void parseCheckAggregates(ParseState *pstate, Query *qry);

extern List *expand_grouping_sets(List *groupingSets, bool groupDistinct, int limit);

extern int  get_aggregate_argtypes(Aggref *aggref, Oid *inputTypes);

extern Oid  resolve_aggregate_transtype(Oid aggfuncid,
                                        Oid aggtranstype,
                                        Oid *inputTypes,
                                        int numArguments);

extern void build_aggregate_transfn_expr(Oid *agg_input_types,
                                         int agg_num_inputs,
                                         int agg_num_direct_inputs,
                                         bool agg_variadic,
                                         Oid agg_state_type,
                                         Oid agg_input_collation,
                                         Oid transfn_oid,
                                         Oid invtransfn_oid,
                                         Expr **transfnexpr,
                                         Expr **invtransfnexpr);

extern void build_aggregate_serialfn_expr(Oid serialfn_oid,
                                          Expr **serialfnexpr);

extern void build_aggregate_deserialfn_expr(Oid deserialfn_oid,
                                            Expr **deserialfnexpr);

extern void build_aggregate_finalfn_expr(Oid *agg_input_types,
                                         int num_finalfn_inputs,
                                         Oid agg_state_type,
                                         Oid agg_result_type,
                                         Oid agg_input_collation,
                                         Oid finalfn_oid,
                                         Expr **finalfnexpr);

#endif                          /* PARSE_AGG_H */