init

pg_include/parser/parse_func.h

@@ -0,0 +1,85 @@
+/*-------------------------------------------------------------------------
+ *
+ * parse_func.h
+ *
+ *
+ *
+ * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/parser/parse_func.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PARSER_FUNC_H
+#define PARSER_FUNC_H
+
+#include "catalog/namespace.h"
+#include "parser/parse_node.h"
+
+
+/*
+ *	This structure is used to explore the inheritance hierarchy above
+ *	nodes in the type tree in order to disambiguate among polymorphic
+ *	functions.
+ */
+typedef struct _InhPaths
+{
+	int			nsupers;		/* number of superclasses */
+	Oid			self;			/* this class */
+	Oid		   *supervec;		/* vector of superclasses */
+}	InhPaths;
+
+/* Result codes for func_get_detail */
+typedef enum
+{
+	FUNCDETAIL_NOTFOUND,		/* no matching function */
+	FUNCDETAIL_MULTIPLE,		/* too many matching functions */
+	FUNCDETAIL_NORMAL,			/* found a matching regular function */
+	FUNCDETAIL_AGGREGATE,		/* found a matching aggregate function */
+	FUNCDETAIL_WINDOWFUNC,		/* found a matching window function */
+	FUNCDETAIL_COERCION			/* it's a type coercion request */
+} FuncDetailCode;
+
+
+extern Node *ParseFuncOrColumn(ParseState *pstate,
+				  List *funcname, List *fargs,
+				  List *agg_order, bool agg_star, bool agg_distinct,
+				  bool func_variadic,
+				  WindowDef *over, bool is_column, int location);
+
+extern FuncDetailCode func_get_detail(List *funcname,
+				List *fargs, List *fargnames,
+				int nargs, Oid *argtypes,
+				bool expand_variadic, bool expand_defaults,
+				Oid *funcid, Oid *rettype,
+				bool *retset, int *nvargs, Oid **true_typeids,
+				List **argdefaults);
+
+extern int func_match_argtypes(int nargs,
+					Oid *input_typeids,
+					FuncCandidateList raw_candidates,
+					FuncCandidateList *candidates);
+
+extern FuncCandidateList func_select_candidate(int nargs,
+					  Oid *input_typeids,
+					  FuncCandidateList candidates);
+
+extern void make_fn_arguments(ParseState *pstate,
+				  List *fargs,
+				  Oid *actual_arg_types,
+				  Oid *declared_arg_types);
+
+extern const char *funcname_signature_string(const char *funcname, int nargs,
+						  List *argnames, const Oid *argtypes);
+extern const char *func_signature_string(List *funcname, int nargs,
+					  List *argnames, const Oid *argtypes);
+
+extern Oid LookupFuncName(List *funcname, int nargs, const Oid *argtypes,
+			   bool noError);
+extern Oid LookupFuncNameTypeNames(List *funcname, List *argtypes,
+						bool noError);
+extern Oid LookupAggNameTypeNames(List *aggname, List *argtypes,
+					   bool noError);
+
+#endif   /* PARSE_FUNC_H */