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 */
70