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/*------------------------------------------------------------------------- * * parse_oper.h * handle operator things for parser * * * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * $PostgreSQL: pgsql/src/include/parser/parse_oper.h,v 1.42 2008/01/01 19:45:58 momjian Exp $ * *------------------------------------------------------------------------- */ #ifndef PARSE_OPER_H #define PARSE_OPER_H #include "access/htup.h" #include "parser/parse_node.h" typedef HeapTuple Operator; /* Routines to look up an operator given name and exact input type(s) */ extern Oid LookupOperName(ParseState *pstate, List *opername, Oid oprleft, Oid oprright, bool noError, int location); extern Oid LookupOperNameTypeNames(ParseState *pstate, List *opername, TypeName *oprleft, TypeName *oprright, bool noError, int location); /* Routines to find operators matching a name and given input types */ /* NB: the selected operator may require coercion of the input types! */ extern Operator oper(ParseState *pstate, List *op, Oid arg1, Oid arg2, bool noError, int location); extern Operator right_oper(ParseState *pstate, List *op, Oid arg, bool noError, int location); extern Operator left_oper(ParseState *pstate, List *op, Oid arg, bool noError, int location); /* Routines to find operators that DO NOT require coercion --- ie, their */ /* input types are either exactly as given, or binary-compatible */ extern Operator compatible_oper(ParseState *pstate, List *op, Oid arg1, Oid arg2, bool noError, int location); /* currently no need for compatible_left_oper/compatible_right_oper */ /* Routines for identifying "=", "<", ">" operators for a type */ extern Operator equality_oper(Oid argtype, bool noError); extern Operator ordering_oper(Oid argtype, bool noError); extern Operator reverse_ordering_oper(Oid argtype, bool noError); /* Convenience routines for common calls on the above */ extern Oid compatible_oper_opid(List *op, Oid arg1, Oid arg2, bool noError); extern Oid equality_oper_funcid(Oid argtype); extern Oid ordering_oper_opid(Oid argtype); extern Oid reverse_ordering_oper_opid(Oid argtype); /* Extract operator OID or underlying-function OID from an Operator tuple */ extern Oid oprid(Operator op); extern Oid oprfuncid(Operator op); /* Build expression tree for an operator invocation */ extern Expr *make_op(ParseState *pstate, List *opname, Node *ltree, Node *rtree, int location); extern Expr *make_scalar_array_op(ParseState *pstate, List *opname, bool useOr, Node *ltree, Node *rtree, int location); #endif /* PARSE_OPER_H */