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 1.1 1997/11/25 22:06:56 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 Node *ParseFunc(ParseState *pstate, char *funcname, List *fargs,
  46         int *curr_resno);
  47
  48 Oid funcid_get_rettype(Oid funcid);
  49
  50 CandidateList func_get_candidates(char *funcname, int nargs);
  51
  52 bool can_coerce(int nargs, Oid *input_typeids, Oid *func_typeids);
  53
  54 int match_argtypes(int nargs,
  55                                    Oid *input_typeids,
  56                                    CandidateList function_typeids,
  57                                    CandidateList *candidates);
  58
  59 Oid * func_select_candidate(int nargs,
  60                                                   Oid *input_typeids,
  61                                                   CandidateList candidates);
  62
  63 bool func_get_detail(char *funcname,
  64                                         int nargs,
  65                                         Oid *oid_array,
  66                                         Oid *funcid,    /* return value */
  67                                         Oid *rettype,   /* return value */
  68                                         bool *retset,   /* return value */
  69                                         Oid **true_typeids);
  70
  71 Oid ** argtype_inherit(int nargs, Oid *oid_array);
  72
  73 int findsupers(Oid relid, Oid **supervec);
  74
  75 Oid **genxprod(InhPaths *arginh, int nargs);
  76
  77 void make_arguments(int nargs,
  78                                    List *fargs,
  79                                    Oid *input_typeids,
  80                                    Oid *function_typeids);
  81
  82 List *setup_tlist(char *attname, Oid relid);
  83
  84 List *setup_base_tlist(Oid typeid);
  85
  86 Node *ParseComplexProjection(ParseState *pstate,
  87                                                    char *funcname,
  88                                                    Node *first_arg,
  89                                                    bool *attisset);
  90
  91 void func_error(char *caller, char *funcname, int nargs, Oid *argtypes);
  92
  93
  94
  95
  96 #endif                                                  /* PARSE_FUNC_H */
  97