103 lines
3.7 KiB
C
103 lines
3.7 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* parse_coerce.h
|
|
* Routines for type coercion.
|
|
*
|
|
*
|
|
* Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
* src/include/parser/parse_coerce.h
|
|
*
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
#ifndef PARSE_COERCE_H
|
|
#define PARSE_COERCE_H
|
|
|
|
#include "parser/parse_node.h"
|
|
|
|
|
|
/* Type categories (see TYPCATEGORY_xxx symbols in catalog/pg_type.h) */
|
|
typedef char TYPCATEGORY;
|
|
|
|
/* Result codes for find_coercion_pathway */
|
|
typedef enum CoercionPathType
|
|
{
|
|
COERCION_PATH_NONE, /* failed to find any coercion pathway */
|
|
COERCION_PATH_FUNC, /* apply the specified coercion function */
|
|
COERCION_PATH_RELABELTYPE, /* binary-compatible cast, no function */
|
|
COERCION_PATH_ARRAYCOERCE, /* need an ArrayCoerceExpr node */
|
|
COERCION_PATH_COERCEVIAIO /* need a CoerceViaIO node */
|
|
} CoercionPathType;
|
|
|
|
|
|
extern bool IsBinaryCoercible(Oid srctype, Oid targettype);
|
|
extern bool IsBinaryCoercibleWithCast(Oid srctype, Oid targettype,
|
|
Oid *castoid);
|
|
extern bool IsPreferredType(TYPCATEGORY category, Oid type);
|
|
extern TYPCATEGORY TypeCategory(Oid type);
|
|
|
|
extern Node *coerce_to_target_type(ParseState *pstate,
|
|
Node *expr, Oid exprtype,
|
|
Oid targettype, int32 targettypmod,
|
|
CoercionContext ccontext,
|
|
CoercionForm cformat,
|
|
int location);
|
|
extern bool can_coerce_type(int nargs, const Oid *input_typeids, const Oid *target_typeids,
|
|
CoercionContext ccontext);
|
|
extern Node *coerce_type(ParseState *pstate, Node *node,
|
|
Oid inputTypeId, Oid targetTypeId, int32 targetTypeMod,
|
|
CoercionContext ccontext, CoercionForm cformat, int location);
|
|
extern Node *coerce_to_domain(Node *arg, Oid baseTypeId, int32 baseTypeMod,
|
|
Oid typeId,
|
|
CoercionContext ccontext, CoercionForm cformat, int location,
|
|
bool hideInputCoercion);
|
|
|
|
extern Node *coerce_to_boolean(ParseState *pstate, Node *node,
|
|
const char *constructName);
|
|
extern Node *coerce_to_specific_type(ParseState *pstate, Node *node,
|
|
Oid targetTypeId,
|
|
const char *constructName);
|
|
|
|
extern Node *coerce_to_specific_type_typmod(ParseState *pstate, Node *node,
|
|
Oid targetTypeId, int32 targetTypmod,
|
|
const char *constructName);
|
|
|
|
extern int parser_coercion_errposition(ParseState *pstate,
|
|
int coerce_location,
|
|
Node *input_expr);
|
|
|
|
extern Oid select_common_type(ParseState *pstate, List *exprs,
|
|
const char *context, Node **which_expr);
|
|
extern Node *coerce_to_common_type(ParseState *pstate, Node *node,
|
|
Oid targetTypeId,
|
|
const char *context);
|
|
extern bool verify_common_type(Oid common_type, List *exprs);
|
|
|
|
extern int32 select_common_typmod(ParseState *pstate, List *exprs, Oid common_type);
|
|
|
|
extern bool check_generic_type_consistency(const Oid *actual_arg_types,
|
|
const Oid *declared_arg_types,
|
|
int nargs);
|
|
extern Oid enforce_generic_type_consistency(const Oid *actual_arg_types,
|
|
Oid *declared_arg_types,
|
|
int nargs,
|
|
Oid rettype,
|
|
bool allow_poly);
|
|
|
|
extern char *check_valid_polymorphic_signature(Oid ret_type,
|
|
const Oid *declared_arg_types,
|
|
int nargs);
|
|
extern char *check_valid_internal_signature(Oid ret_type,
|
|
const Oid *declared_arg_types,
|
|
int nargs);
|
|
|
|
extern CoercionPathType find_coercion_pathway(Oid targetTypeId,
|
|
Oid sourceTypeId,
|
|
CoercionContext ccontext,
|
|
Oid *funcid);
|
|
extern CoercionPathType find_typmod_coercion_function(Oid typeId,
|
|
Oid *funcid);
|
|
|
|
#endif /* PARSE_COERCE_H */
|