blob: 59f35867a72b278cc2fd24db1fb450a38cb91dce (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/*-------------------------------------------------------------------------
*
* fcache.h
* Declarations for function cache records.
*
* The first time any Oper or Func node is evaluated, we compute a cache
* record for the function being invoked, and save a pointer to the cache
* record in the Oper or Func node. This saves repeated lookup of info
* about the function.
*
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: fcache.h,v 1.12 2000/07/12 02:37:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef FCACHE_H
#define FCACHE_H
#include "fmgr.h"
typedef struct
{
FmgrInfo func; /* info for fmgr call mechanism */
Oid foid; /* oid of the function in pg_proc */
Oid language; /* oid of the language in pg_language */
int typlen; /* length of the return type */
bool typbyval; /* true if return type is pass by value */
bool oneResult; /* true we only want 1 result from the
* function */
bool hasSetArg; /* true if func is part of a nested dot
* expr whose argument is func returning a
* set ugh! */
/* If additional info is added to an existing fcache, be sure to
* allocate it in the fcacheCxt.
*/
MemoryContext fcacheCxt; /* context the fcache lives in */
int nargs; /* actual number of arguments */
Oid *argOidVect; /* oids of all the argument types */
char *src; /* source code of the function */
char *bin; /* binary object code ?? */
char *func_state; /* function_state struct for execution */
Pointer funcSlot; /* if one result we need to copy it before
* we end execution of the function and
* free stuff */
Datum setArg; /* current argument for nested dot
* execution Nested dot expressions mean
* we have funcs whose argument is a set
* of tuples */
} FunctionCache;
typedef FunctionCache *FunctionCachePtr;
#endif /* FCACHE_H */
|
