src/include/parser/parse_func.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * catalog_utils.h--
   4  *
   5  *
   6  *
   7  * Copyright (c) 1994, Regents of the University of California
   8  *
   9  * $Id: parse_func.h,v 1.2 1997/11/26 01:14:04 momjian Exp $
  10  *
  11  *-------------------------------------------------------------------------
  12  */
  13 #ifndef PARSER_FUNC_H
  14 #define PARSER_FUNC_H
  15
  16 #include <nodes/nodes.h>
  17 #include <nodes/pg_list.h>
  18 #include <nodes/parsenodes.h>
  19 #include <nodes/primnodes.h>
  20 #include <parser/parse_func.h>
  21 #include <parser/parse_node.h>
  22
  23 /*
  24  *      This structure is used to explore the inheritance hierarchy above
  25  *      nodes in the type tree in order to disambiguate among polymorphic
  26  *      functions.
  27  */
  28 typedef struct _InhPaths
  29 {
  30         int                     nsupers;                /* number of superclasses */
  31         Oid                     self;                   /* this class */
  32         Oid                *supervec;           /* vector of superclasses */
  33 } InhPaths;
  34
  35 /*
  36  *      This structure holds a list of possible functions or operators that
  37  *      agree with the known name and argument types of the function/operator.
  38  */
  39 typedef struct _CandidateList
  40 {
  41         Oid                *args;
  42         struct _CandidateList *next;
  43 }                  *CandidateList;
  44
  45 extern Node *ParseFunc(ParseState *pstate, char *funcname, List *fargs,
  46         int *curr_resno);
  47 extern Oid funcid_get_rettype(Oid funcid);
  48 extern CandidateList func_get_candidates(char *funcname, int nargs);
  49 extern bool can_coerce(int nargs, Oid *input_typeids, Oid *func_typeids);
  50 extern int match_argtypes(int nargs,
  51                                    Oid *input_typeids,
  52                                    CandidateList function_typeids,
  53                                    CandidateList *candidates);
  54 extern Oid * func_select_candidate(int nargs,
  55                                                   Oid *input_typeids,
  56                                                   CandidateList candidates);
  57 extern bool func_get_detail(char *funcname,
  58                                         int nargs,
  59                                         Oid *oid_array,
  60                                         Oid *funcid,    /* return value */
  61                                         Oid *rettype,   /* return value */
  62                                         bool *retset,   /* return value */
  63                                         Oid **true_typeids);
  64 extern Oid ** argtype_inherit(int nargs, Oid *oid_array);
  65 extern int findsupers(Oid relid, Oid **supervec);
  66 extern Oid **genxprod(InhPaths *arginh, int nargs);
  67 extern void make_arguments(int nargs,
  68                                    List *fargs,
  69                                    Oid *input_typeids,
  70                                    Oid *function_typeids);
  71
  72 extern List *setup_tlist(char *attname, Oid relid);
  73 extern List *setup_base_tlist(Oid typeid);
  74 extern Node *ParseComplexProjection(ParseState *pstate,
  75                                                    char *funcname,
  76                                                    Node *first_arg,
  77                                                    bool *attisset);
  78 extern void func_error(char *caller, char *funcname, int nargs, Oid *argtypes);
  79
  80 #endif                                                  /* PARSE_FUNC_H */
  81