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/*------------------------------------------------------------------------- * * parse_coerce.h * Routines for type coercion. * * * Portions Copyright (c) 1996-2016, 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 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, Oid *input_typeids, 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, CoercionForm cformat, int location, bool hideInputCoercion, bool lengthCoercionDone); 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 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 check_generic_type_consistency(Oid *actual_arg_types, Oid *declared_arg_types, int nargs); extern Oid enforce_generic_type_consistency(Oid *actual_arg_types, Oid *declared_arg_types, int nargs, Oid rettype, bool allow_poly); extern Oid resolve_generic_type(Oid declared_type, Oid context_actual_type, Oid context_declared_type); 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 */