1 files changed, 68 insertions, 0 deletions
diff --git a/src/include/parser/parse_agg.h b/src/include/parser/parse_agg.h
new file mode 100644
index 0000000..4dea017
--- /dev/null
+++ b/src/include/parser/parse_agg.h
@@ -0,0 +1,68 @@
+/*-------------------------------------------------------------------------
+ *
+ * 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_combinefn_expr(Oid agg_state_type,
+										   Oid agg_input_collation,
+										   Oid combinefn_oid,
+										   Expr **combinefnexpr);
+
+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 */