codekingpro/portable-devtools

1/*-------------------------------------------------------------------------2 *3 * parse_coerce.h4 *	Routines for type coercion.5 *6 *7 * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group8 * Portions Copyright (c) 1994, Regents of the University of California9 *10 * src/include/parser/parse_coerce.h11 *12 *-------------------------------------------------------------------------13 */14#ifndef PARSE_COERCE_H15#define PARSE_COERCE_H16 17#include "parser/parse_node.h"18 19 20/* Type categories (see TYPCATEGORY_xxx symbols in catalog/pg_type.h) */21typedef char TYPCATEGORY;22 23/* Result codes for find_coercion_pathway */24typedef enum CoercionPathType25{26	COERCION_PATH_NONE,			/* failed to find any coercion pathway */27	COERCION_PATH_FUNC,			/* apply the specified coercion function */28	COERCION_PATH_RELABELTYPE,	/* binary-compatible cast, no function */29	COERCION_PATH_ARRAYCOERCE,	/* need an ArrayCoerceExpr node */30	COERCION_PATH_COERCEVIAIO	/* need a CoerceViaIO node */31} CoercionPathType;32 33 34extern bool IsBinaryCoercible(Oid srctype, Oid targettype);35extern bool IsBinaryCoercibleWithCast(Oid srctype, Oid targettype,36									  Oid *castoid);37extern bool IsPreferredType(TYPCATEGORY category, Oid type);38extern TYPCATEGORY TypeCategory(Oid type);39 40extern Node *coerce_to_target_type(ParseState *pstate,41								   Node *expr, Oid exprtype,42								   Oid targettype, int32 targettypmod,43								   CoercionContext ccontext,44								   CoercionForm cformat,45								   int location);46extern bool can_coerce_type(int nargs, const Oid *input_typeids, const Oid *target_typeids,47							CoercionContext ccontext);48extern Node *coerce_type(ParseState *pstate, Node *node,49						 Oid inputTypeId, Oid targetTypeId, int32 targetTypeMod,50						 CoercionContext ccontext, CoercionForm cformat, int location);51extern Node *coerce_to_domain(Node *arg, Oid baseTypeId, int32 baseTypeMod,52							  Oid typeId,53							  CoercionContext ccontext, CoercionForm cformat, int location,54							  bool hideInputCoercion);55 56extern Node *coerce_to_boolean(ParseState *pstate, Node *node,57							   const char *constructName);58extern Node *coerce_to_specific_type(ParseState *pstate, Node *node,59									 Oid targetTypeId,60									 const char *constructName);61 62extern Node *coerce_to_specific_type_typmod(ParseState *pstate, Node *node,63											Oid targetTypeId, int32 targetTypmod,64											const char *constructName);65 66extern int	parser_coercion_errposition(ParseState *pstate,67										int coerce_location,68										Node *input_expr);69 70extern Oid	select_common_type(ParseState *pstate, List *exprs,71							   const char *context, Node **which_expr);72extern Node *coerce_to_common_type(ParseState *pstate, Node *node,73								   Oid targetTypeId,74								   const char *context);75extern bool verify_common_type(Oid common_type, List *exprs);76 77extern int32 select_common_typmod(ParseState *pstate, List *exprs, Oid common_type);78 79extern bool check_generic_type_consistency(const Oid *actual_arg_types,80										   const Oid *declared_arg_types,81										   int nargs);82extern Oid	enforce_generic_type_consistency(const Oid *actual_arg_types,83											 Oid *declared_arg_types,84											 int nargs,85											 Oid rettype,86											 bool allow_poly);87 88extern char *check_valid_polymorphic_signature(Oid ret_type,89											   const Oid *declared_arg_types,90											   int nargs);91extern char *check_valid_internal_signature(Oid ret_type,92											const Oid *declared_arg_types,93											int nargs);94 95extern CoercionPathType find_coercion_pathway(Oid targetTypeId,96											  Oid sourceTypeId,97											  CoercionContext ccontext,98											  Oid *funcid);99extern CoercionPathType find_typmod_coercion_function(Oid typeId,100													  Oid *funcid);101 102#endif							/* PARSE_COERCE_H */103