src/include/parser/parse_func.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * parse_func.h
   4  *
   5  *
   6  *
   7  * Portions Copyright (c) 1996-2000, PostgreSQL, Inc
   8  * Portions Copyright (c) 1994, Regents of the University of California
   9  *
  10  * $Id: parse_func.h,v 1.22 2000/01/26 05:58:27 momjian Exp $
  11  *
  12  *-------------------------------------------------------------------------
  13  */
  14 #ifndef PARSER_FUNC_H
  15 #define PARSER_FUNC_H
  16
  17 #include "parser/parse_node.h"
  18
  19 /*
  20  *      This structure is used to explore the inheritance hierarchy above
  21  *      nodes in the type tree in order to disambiguate among polymorphic
  22  *      functions.
  23  */
  24 typedef struct _InhPaths
  25 {
  26         int                     nsupers;                /* number of superclasses */
  27         Oid                     self;                   /* this class */
  28         Oid                *supervec;           /* vector of superclasses */
  29 } InhPaths;
  30
  31 /*
  32  *      This structure holds a list of possible functions or operators that
  33  *      agree with the known name and argument types of the function/operator.
  34  */
  35 typedef struct _CandidateList
  36 {
  37         Oid                *args;
  38         struct _CandidateList *next;
  39 }                  *CandidateList;
  40
  41 extern Node *ParseNestedFuncOrColumn(ParseState *pstate, Attr *attr,
  42                                                 int *curr_resno, int precedence);
  43 extern Node *ParseFuncOrColumn(ParseState *pstate,
  44                                                            char *funcname, List *fargs,
  45                                                            bool agg_star, bool agg_distinct,
  46                                                            int *curr_resno, int precedence);
  47
  48 extern List *setup_base_tlist(Oid typeid);
  49
  50 extern void func_error(char *caller, char *funcname,
  51                                            int nargs, Oid *argtypes, char *msg);
  52
  53 #endif   /* PARSE_FUNC_H */