src/pl/plpython/plpy_procedure.h

   1 /*
   2  * src/pl/plpython/plpy_procedure.h
   3  */
   4
   5 #ifndef PLPY_PROCEDURE_H
   6 #define PLPY_PROCEDURE_H
   7
   8 #include "plpy_typeio.h"
   9
  10
  11 extern void init_procedure_caches(void);
  12
  13
  14 /* saved arguments for outer recursion level or set-returning function */
  15 typedef struct PLySavedArgs
  16 {
  17         struct PLySavedArgs *next;      /* linked-list pointer */
  18         PyObject   *args;                       /* "args" element of globals dict */
  19         int                     nargs;                  /* length of namedargs array */
  20         PyObject   *namedargs[FLEXIBLE_ARRAY_MEMBER];           /* named args */
  21 } PLySavedArgs;
  22
  23 /* cached procedure data */
  24 typedef struct PLyProcedure
  25 {
  26         MemoryContext mcxt;                     /* context holding this PLyProcedure and its
  27                                                                  * subsidiary data */
  28         char       *proname;            /* SQL name of procedure */
  29         char       *pyname;                     /* Python name of procedure */
  30         TransactionId fn_xmin;
  31         ItemPointerData fn_tid;
  32         bool            fn_readonly;
  33         bool            is_setof;               /* true, if procedure returns result set */
  34         PLyTypeInfo result;                     /* also used to store info for trigger tuple
  35                                                                  * type */
  36         char       *src;                        /* textual procedure code, after mangling */
  37         char      **argnames;           /* Argument names */
  38         PLyTypeInfo args[FUNC_MAX_ARGS];
  39         int                     nargs;
  40         Oid                     langid;                 /* OID of plpython pg_language entry */
  41         List       *trftypes;           /* OID list of transform types */
  42         PyObject   *code;                       /* compiled procedure code */
  43         PyObject   *statics;            /* data saved across calls, local scope */
  44         PyObject   *globals;            /* data saved across calls, global scope */
  45         long            calldepth;              /* depth of recursive calls of function */
  46         PLySavedArgs *argstack;         /* stack of outer-level call arguments */
  47 } PLyProcedure;
  48
  49 /* the procedure cache key */
  50 typedef struct PLyProcedureKey
  51 {
  52         Oid                     fn_oid;                 /* function OID */
  53         Oid                     fn_rel;                 /* triggered-on relation or InvalidOid */
  54 } PLyProcedureKey;
  55
  56 /* the procedure cache entry */
  57 typedef struct PLyProcedureEntry
  58 {
  59         PLyProcedureKey key;            /* hash key */
  60         PLyProcedure *proc;
  61 } PLyProcedureEntry;
  62
  63 /* PLyProcedure manipulation */
  64 extern char *PLy_procedure_name(PLyProcedure *proc);
  65 extern PLyProcedure *PLy_procedure_get(Oid fn_oid, Oid fn_rel, bool is_trigger);
  66 extern void PLy_procedure_compile(PLyProcedure *proc, const char *src);
  67 extern void PLy_procedure_delete(PLyProcedure *proc);
  68
  69 #endif   /* PLPY_PROCEDURE_H */