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fmgr.h
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1 /*-------------------------------------------------------------------------
2  *
3  * fmgr.h
4  * Definitions for the Postgres function manager and function-call
5  * interface.
6  *
7  * This file must be included by all Postgres modules that either define
8  * or call fmgr-callable functions.
9  *
10  *
11  * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
12  * Portions Copyright (c) 1994, Regents of the University of California
13  *
14  * src/include/fmgr.h
15  *
16  *-------------------------------------------------------------------------
17  */
18 #ifndef FMGR_H
19 #define FMGR_H
20 
21 /* We don't want to include primnodes.h here, so make some stub references */
22 typedef struct Node *fmNodePtr;
23 typedef struct Aggref *fmAggrefPtr;
24 
25 /* Likewise, avoid including execnodes.h here */
27 
28 /* Likewise, avoid including stringinfo.h here */
29 typedef struct StringInfoData *fmStringInfo;
30 
31 
32 /*
33  * All functions that can be called directly by fmgr must have this signature.
34  * (Other functions can be called by using a handler that does have this
35  * signature.)
36  */
37 
39 
40 typedef Datum (*PGFunction) (FunctionCallInfo fcinfo);
41 
42 /*
43  * This struct holds the system-catalog information that must be looked up
44  * before a function can be called through fmgr. If the same function is
45  * to be called multiple times, the lookup need be done only once and the
46  * info struct saved for re-use.
47  *
48  * Note that fn_expr really is parse-time-determined information about the
49  * arguments, rather than about the function itself. But it's convenient to
50  * store it here rather than in FunctionCallInfoBaseData, where it might more
51  * logically belong.
52  *
53  * fn_extra is available for use by the called function; all other fields
54  * should be treated as read-only after the struct is created.
55  */
56 typedef struct FmgrInfo
57 {
58  PGFunction fn_addr; /* pointer to function or handler to be called */
59  Oid fn_oid; /* OID of function (NOT of handler, if any) */
60  short fn_nargs; /* number of input args (0..FUNC_MAX_ARGS) */
61  bool fn_strict; /* function is "strict" (NULL in => NULL out) */
62  bool fn_retset; /* function returns a set */
63  unsigned char fn_stats; /* collect stats if track_functions > this */
64  void *fn_extra; /* extra space for use by handler */
65  MemoryContext fn_mcxt; /* memory context to store fn_extra in */
66  fmNodePtr fn_expr; /* expression parse tree for call, or NULL */
67 } FmgrInfo;
68 
69 /*
70  * This struct is the data actually passed to an fmgr-called function.
71  *
72  * The called function is expected to set isnull, and possibly resultinfo or
73  * fields in whatever resultinfo points to. It should not change any other
74  * fields. (In particular, scribbling on the argument arrays is a bad idea,
75  * since some callers assume they can re-call with the same arguments.)
76  *
77  * Note that enough space for arguments needs to be provided, either by using
78  * SizeForFunctionCallInfo() in dynamic allocations, or by using
79  * LOCAL_FCINFO() for on-stack allocations.
80  *
81  * This struct is named *BaseData, rather than *Data, to break pre v12 code
82  * that allocated FunctionCallInfoData itself, as it'd often silently break
83  * old code due to no space for arguments being provided.
84  */
86 {
87  FmgrInfo *flinfo; /* ptr to lookup info used for this call */
88  fmNodePtr context; /* pass info about context of call */
89  fmNodePtr resultinfo; /* pass or return extra info about result */
90  Oid fncollation; /* collation for function to use */
91 #define FIELDNO_FUNCTIONCALLINFODATA_ISNULL 4
92  bool isnull; /* function must set true if result is NULL */
93  short nargs; /* # arguments actually passed */
94 #define FIELDNO_FUNCTIONCALLINFODATA_ARGS 6
95  NullableDatum args[FLEXIBLE_ARRAY_MEMBER];
97 
98 /*
99  * Space needed for a FunctionCallInfoBaseData struct with sufficient space
100  * for `nargs` arguments.
101  */
102 #define SizeForFunctionCallInfo(nargs) \
103  (offsetof(FunctionCallInfoBaseData, args) + \
104  sizeof(NullableDatum) * (nargs))
105 
106 /*
107  * This macro ensures that `name` points to a stack-allocated
108  * FunctionCallInfoBaseData struct with sufficient space for `nargs` arguments.
109  */
110 #define LOCAL_FCINFO(name, nargs) \
111  /* use union with FunctionCallInfoBaseData to guarantee alignment */ \
112  union \
113  { \
114  FunctionCallInfoBaseData fcinfo; \
115  /* ensure enough space for nargs args is available */ \
116  char fcinfo_data[SizeForFunctionCallInfo(nargs)]; \
117  } name##data; \
118  FunctionCallInfo name = &name##data.fcinfo
119 
120 /*
121  * This routine fills a FmgrInfo struct, given the OID
122  * of the function to be called.
123  */
124 extern void fmgr_info(Oid functionId, FmgrInfo *finfo);
125 
126 /*
127  * Same, when the FmgrInfo struct is in a memory context longer-lived than
128  * CurrentMemoryContext. The specified context will be set as fn_mcxt
129  * and used to hold all subsidiary data of finfo.
130  */
131 extern void fmgr_info_cxt(Oid functionId, FmgrInfo *finfo,
132  MemoryContext mcxt);
133 
134 /* Convenience macro for setting the fn_expr field */
135 #define fmgr_info_set_expr(expr, finfo) \
136  ((finfo)->fn_expr = (expr))
137 
138 /*
139  * Copy an FmgrInfo struct
140  */
141 extern void fmgr_info_copy(FmgrInfo *dstinfo, FmgrInfo *srcinfo,
142  MemoryContext destcxt);
143 
144 extern void fmgr_symbol(Oid functionId, char **mod, char **fn);
145 
146 /*
147  * This macro initializes all the fields of a FunctionCallInfoBaseData except
148  * for the args[] array.
149  */
150 #define InitFunctionCallInfoData(Fcinfo, Flinfo, Nargs, Collation, Context, Resultinfo) \
151  do { \
152  (Fcinfo).flinfo = (Flinfo); \
153  (Fcinfo).context = (Context); \
154  (Fcinfo).resultinfo = (Resultinfo); \
155  (Fcinfo).fncollation = (Collation); \
156  (Fcinfo).isnull = false; \
157  (Fcinfo).nargs = (Nargs); \
158  } while (0)
159 
160 /*
161  * This macro invokes a function given a filled-in FunctionCallInfoBaseData
162  * struct. The macro result is the returned Datum --- but note that
163  * caller must still check fcinfo->isnull! Also, if function is strict,
164  * it is caller's responsibility to verify that no null arguments are present
165  * before calling.
166  */
167 #define FunctionCallInvoke(fcinfo) ((* (fcinfo)->flinfo->fn_addr) (fcinfo))
168 
169 
170 /*-------------------------------------------------------------------------
171  * Support macros to ease writing fmgr-compatible functions
172  *
173  * A C-coded fmgr-compatible function should be declared as
174  *
175  * Datum
176  * function_name(PG_FUNCTION_ARGS)
177  * {
178  * ...
179  * }
180  *
181  * It should access its arguments using appropriate PG_GETARG_xxx macros
182  * and should return its result using PG_RETURN_xxx.
183  *
184  *-------------------------------------------------------------------------
185  */
186 
187 /* Standard parameter list for fmgr-compatible functions */
188 #define PG_FUNCTION_ARGS FunctionCallInfo fcinfo
189 
190 /*
191  * Get collation function should use.
192  */
193 #define PG_GET_COLLATION() (fcinfo->fncollation)
194 
195 /*
196  * Get number of arguments passed to function.
197  */
198 #define PG_NARGS() (fcinfo->nargs)
199 
200 /*
201  * If function is not marked "proisstrict" in pg_proc, it must check for
202  * null arguments using this macro. Do not try to GETARG a null argument!
203  */
204 #define PG_ARGISNULL(n) (fcinfo->args[n].isnull)
205 
206 /*
207  * Support for fetching detoasted copies of toastable datatypes (all of
208  * which are varlena types). pg_detoast_datum() gives you either the input
209  * datum (if not toasted) or a detoasted copy allocated with palloc().
210  * pg_detoast_datum_copy() always gives you a palloc'd copy --- use it
211  * if you need a modifiable copy of the input. Caller is expected to have
212  * checked for null inputs first, if necessary.
213  *
214  * pg_detoast_datum_packed() will return packed (1-byte header) datums
215  * unmodified. It will still expand an externally toasted or compressed datum.
216  * The resulting datum can be accessed using VARSIZE_ANY() and VARDATA_ANY()
217  * (beware of multiple evaluations in those macros!)
218  *
219  * In consumers oblivious to data alignment, call PG_DETOAST_DATUM_PACKED(),
220  * VARDATA_ANY(), VARSIZE_ANY() and VARSIZE_ANY_EXHDR(). Elsewhere, call
221  * PG_DETOAST_DATUM(), VARDATA() and VARSIZE(). Directly fetching an int16,
222  * int32 or wider field in the struct representing the datum layout requires
223  * aligned data. memcpy() is alignment-oblivious, as are most operations on
224  * datatypes, such as text, whose layout struct contains only char fields.
225  *
226  * Note: it'd be nice if these could be macros, but I see no way to do that
227  * without evaluating the arguments multiple times, which is NOT acceptable.
228  */
229 extern struct varlena *pg_detoast_datum(struct varlena *datum);
230 extern struct varlena *pg_detoast_datum_copy(struct varlena *datum);
231 extern struct varlena *pg_detoast_datum_slice(struct varlena *datum,
232  int32 first, int32 count);
233 extern struct varlena *pg_detoast_datum_packed(struct varlena *datum);
234 
235 #define PG_DETOAST_DATUM(datum) \
236  pg_detoast_datum((struct varlena *) DatumGetPointer(datum))
237 #define PG_DETOAST_DATUM_COPY(datum) \
238  pg_detoast_datum_copy((struct varlena *) DatumGetPointer(datum))
239 #define PG_DETOAST_DATUM_SLICE(datum,f,c) \
240  pg_detoast_datum_slice((struct varlena *) DatumGetPointer(datum), \
241  (int32) (f), (int32) (c))
242 /* WARNING -- unaligned pointer */
243 #define PG_DETOAST_DATUM_PACKED(datum) \
244  pg_detoast_datum_packed((struct varlena *) DatumGetPointer(datum))
245 
246 /*
247  * Support for cleaning up detoasted copies of inputs. This must only
248  * be used for pass-by-ref datatypes, and normally would only be used
249  * for toastable types. If the given pointer is different from the
250  * original argument, assume it's a palloc'd detoasted copy, and pfree it.
251  * NOTE: most functions on toastable types do not have to worry about this,
252  * but we currently require that support functions for indexes not leak
253  * memory.
254  */
255 #define PG_FREE_IF_COPY(ptr,n) \
256  do { \
257  if ((Pointer) (ptr) != PG_GETARG_POINTER(n)) \
258  pfree(ptr); \
259  } while (0)
260 
261 /* Macros for fetching arguments of standard types */
262 
263 #define PG_GETARG_DATUM(n) (fcinfo->args[n].value)
264 #define PG_GETARG_INT32(n) DatumGetInt32(PG_GETARG_DATUM(n))
265 #define PG_GETARG_UINT32(n) DatumGetUInt32(PG_GETARG_DATUM(n))
266 #define PG_GETARG_INT16(n) DatumGetInt16(PG_GETARG_DATUM(n))
267 #define PG_GETARG_UINT16(n) DatumGetUInt16(PG_GETARG_DATUM(n))
268 #define PG_GETARG_CHAR(n) DatumGetChar(PG_GETARG_DATUM(n))
269 #define PG_GETARG_BOOL(n) DatumGetBool(PG_GETARG_DATUM(n))
270 #define PG_GETARG_OID(n) DatumGetObjectId(PG_GETARG_DATUM(n))
271 #define PG_GETARG_POINTER(n) DatumGetPointer(PG_GETARG_DATUM(n))
272 #define PG_GETARG_CSTRING(n) DatumGetCString(PG_GETARG_DATUM(n))
273 #define PG_GETARG_NAME(n) DatumGetName(PG_GETARG_DATUM(n))
274 /* these macros hide the pass-by-reference-ness of the datatype: */
275 #define PG_GETARG_FLOAT4(n) DatumGetFloat4(PG_GETARG_DATUM(n))
276 #define PG_GETARG_FLOAT8(n) DatumGetFloat8(PG_GETARG_DATUM(n))
277 #define PG_GETARG_INT64(n) DatumGetInt64(PG_GETARG_DATUM(n))
278 /* use this if you want the raw, possibly-toasted input datum: */
279 #define PG_GETARG_RAW_VARLENA_P(n) ((struct varlena *) PG_GETARG_POINTER(n))
280 /* use this if you want the input datum de-toasted: */
281 #define PG_GETARG_VARLENA_P(n) PG_DETOAST_DATUM(PG_GETARG_DATUM(n))
282 /* and this if you can handle 1-byte-header datums: */
283 #define PG_GETARG_VARLENA_PP(n) PG_DETOAST_DATUM_PACKED(PG_GETARG_DATUM(n))
284 /* DatumGetFoo macros for varlena types will typically look like this: */
285 #define DatumGetByteaPP(X) ((bytea *) PG_DETOAST_DATUM_PACKED(X))
286 #define DatumGetTextPP(X) ((text *) PG_DETOAST_DATUM_PACKED(X))
287 #define DatumGetBpCharPP(X) ((BpChar *) PG_DETOAST_DATUM_PACKED(X))
288 #define DatumGetVarCharPP(X) ((VarChar *) PG_DETOAST_DATUM_PACKED(X))
289 #define DatumGetHeapTupleHeader(X) ((HeapTupleHeader) PG_DETOAST_DATUM(X))
290 /* And we also offer variants that return an OK-to-write copy */
291 #define DatumGetByteaPCopy(X) ((bytea *) PG_DETOAST_DATUM_COPY(X))
292 #define DatumGetTextPCopy(X) ((text *) PG_DETOAST_DATUM_COPY(X))
293 #define DatumGetBpCharPCopy(X) ((BpChar *) PG_DETOAST_DATUM_COPY(X))
294 #define DatumGetVarCharPCopy(X) ((VarChar *) PG_DETOAST_DATUM_COPY(X))
295 #define DatumGetHeapTupleHeaderCopy(X) ((HeapTupleHeader) PG_DETOAST_DATUM_COPY(X))
296 /* Variants which return n bytes starting at pos. m */
297 #define DatumGetByteaPSlice(X,m,n) ((bytea *) PG_DETOAST_DATUM_SLICE(X,m,n))
298 #define DatumGetTextPSlice(X,m,n) ((text *) PG_DETOAST_DATUM_SLICE(X,m,n))
299 #define DatumGetBpCharPSlice(X,m,n) ((BpChar *) PG_DETOAST_DATUM_SLICE(X,m,n))
300 #define DatumGetVarCharPSlice(X,m,n) ((VarChar *) PG_DETOAST_DATUM_SLICE(X,m,n))
301 /* GETARG macros for varlena types will typically look like this: */
302 #define PG_GETARG_BYTEA_PP(n) DatumGetByteaPP(PG_GETARG_DATUM(n))
303 #define PG_GETARG_TEXT_PP(n) DatumGetTextPP(PG_GETARG_DATUM(n))
304 #define PG_GETARG_BPCHAR_PP(n) DatumGetBpCharPP(PG_GETARG_DATUM(n))
305 #define PG_GETARG_VARCHAR_PP(n) DatumGetVarCharPP(PG_GETARG_DATUM(n))
306 #define PG_GETARG_HEAPTUPLEHEADER(n) DatumGetHeapTupleHeader(PG_GETARG_DATUM(n))
307 /* And we also offer variants that return an OK-to-write copy */
308 #define PG_GETARG_BYTEA_P_COPY(n) DatumGetByteaPCopy(PG_GETARG_DATUM(n))
309 #define PG_GETARG_TEXT_P_COPY(n) DatumGetTextPCopy(PG_GETARG_DATUM(n))
310 #define PG_GETARG_BPCHAR_P_COPY(n) DatumGetBpCharPCopy(PG_GETARG_DATUM(n))
311 #define PG_GETARG_VARCHAR_P_COPY(n) DatumGetVarCharPCopy(PG_GETARG_DATUM(n))
312 #define PG_GETARG_HEAPTUPLEHEADER_COPY(n) DatumGetHeapTupleHeaderCopy(PG_GETARG_DATUM(n))
313 /* And a b-byte slice from position a -also OK to write */
314 #define PG_GETARG_BYTEA_P_SLICE(n,a,b) DatumGetByteaPSlice(PG_GETARG_DATUM(n),a,b)
315 #define PG_GETARG_TEXT_P_SLICE(n,a,b) DatumGetTextPSlice(PG_GETARG_DATUM(n),a,b)
316 #define PG_GETARG_BPCHAR_P_SLICE(n,a,b) DatumGetBpCharPSlice(PG_GETARG_DATUM(n),a,b)
317 #define PG_GETARG_VARCHAR_P_SLICE(n,a,b) DatumGetVarCharPSlice(PG_GETARG_DATUM(n),a,b)
318 /*
319  * Obsolescent variants that guarantee INT alignment for the return value.
320  * Few operations on these particular types need alignment, mainly operations
321  * that cast the VARDATA pointer to a type like int16[]. Most code should use
322  * the ...PP(X) counterpart. Nonetheless, these appear frequently in code
323  * predating the PostgreSQL 8.3 introduction of the ...PP(X) variants.
324  */
325 #define DatumGetByteaP(X) ((bytea *) PG_DETOAST_DATUM(X))
326 #define DatumGetTextP(X) ((text *) PG_DETOAST_DATUM(X))
327 #define DatumGetBpCharP(X) ((BpChar *) PG_DETOAST_DATUM(X))
328 #define DatumGetVarCharP(X) ((VarChar *) PG_DETOAST_DATUM(X))
329 #define PG_GETARG_BYTEA_P(n) DatumGetByteaP(PG_GETARG_DATUM(n))
330 #define PG_GETARG_TEXT_P(n) DatumGetTextP(PG_GETARG_DATUM(n))
331 #define PG_GETARG_BPCHAR_P(n) DatumGetBpCharP(PG_GETARG_DATUM(n))
332 #define PG_GETARG_VARCHAR_P(n) DatumGetVarCharP(PG_GETARG_DATUM(n))
333 
334 /* To return a NULL do this: */
335 #define PG_RETURN_NULL() \
336  do { fcinfo->isnull = true; return (Datum) 0; } while (0)
337 
338 /* A few internal functions return void (which is not the same as NULL!) */
339 #define PG_RETURN_VOID() return (Datum) 0
340 
341 /* Macros for returning results of standard types */
342 
343 #define PG_RETURN_DATUM(x) return (x)
344 #define PG_RETURN_INT32(x) return Int32GetDatum(x)
345 #define PG_RETURN_UINT32(x) return UInt32GetDatum(x)
346 #define PG_RETURN_INT16(x) return Int16GetDatum(x)
347 #define PG_RETURN_UINT16(x) return UInt16GetDatum(x)
348 #define PG_RETURN_CHAR(x) return CharGetDatum(x)
349 #define PG_RETURN_BOOL(x) return BoolGetDatum(x)
350 #define PG_RETURN_OID(x) return ObjectIdGetDatum(x)
351 #define PG_RETURN_POINTER(x) return PointerGetDatum(x)
352 #define PG_RETURN_CSTRING(x) return CStringGetDatum(x)
353 #define PG_RETURN_NAME(x) return NameGetDatum(x)
354 /* these macros hide the pass-by-reference-ness of the datatype: */
355 #define PG_RETURN_FLOAT4(x) return Float4GetDatum(x)
356 #define PG_RETURN_FLOAT8(x) return Float8GetDatum(x)
357 #define PG_RETURN_INT64(x) return Int64GetDatum(x)
358 #define PG_RETURN_UINT64(x) return UInt64GetDatum(x)
359 /* RETURN macros for other pass-by-ref types will typically look like this: */
360 #define PG_RETURN_BYTEA_P(x) PG_RETURN_POINTER(x)
361 #define PG_RETURN_TEXT_P(x) PG_RETURN_POINTER(x)
362 #define PG_RETURN_BPCHAR_P(x) PG_RETURN_POINTER(x)
363 #define PG_RETURN_VARCHAR_P(x) PG_RETURN_POINTER(x)
364 #define PG_RETURN_HEAPTUPLEHEADER(x) return HeapTupleHeaderGetDatum(x)
365 
366 
367 /*-------------------------------------------------------------------------
368  * Support for detecting call convention of dynamically-loaded functions
369  *
370  * Dynamically loaded functions currently can only use the version-1 ("new
371  * style") calling convention. Version-0 ("old style") is not supported
372  * anymore. Version 1 is the call convention defined in this header file, and
373  * must be accompanied by the macro call
374  *
375  * PG_FUNCTION_INFO_V1(function_name);
376  *
377  * Note that internal functions do not need this decoration since they are
378  * assumed to be version-1.
379  *
380  *-------------------------------------------------------------------------
381  */
382 
383 typedef struct
384 {
385  int api_version; /* specifies call convention version number */
386  /* More fields may be added later, for version numbers > 1. */
388 
389 /* Expected signature of an info function */
390 typedef const Pg_finfo_record *(*PGFInfoFunction) (void);
391 
392 /*
393  * Macro to build an info function associated with the given function name.
394  *
395  * As a convenience, also provide an "extern" declaration for the given
396  * function name, so that writers of C functions need not write that too.
397  *
398  * On Windows, the function and info function must be exported. Our normal
399  * build processes take care of that via .DEF files or --export-all-symbols.
400  * Module authors using a different build process might need to manually
401  * declare the function PGDLLEXPORT. We do that automatically here for the
402  * info function, since authors shouldn't need to be explicitly aware of it.
403  */
404 #define PG_FUNCTION_INFO_V1(funcname) \
405 extern Datum funcname(PG_FUNCTION_ARGS); \
406 extern PGDLLEXPORT const Pg_finfo_record * CppConcat(pg_finfo_,funcname)(void); \
407 const Pg_finfo_record * \
408 CppConcat(pg_finfo_,funcname) (void) \
409 { \
410  static const Pg_finfo_record my_finfo = { 1 }; \
411  return &my_finfo; \
412 } \
413 extern int no_such_variable
414 
415 
416 /*-------------------------------------------------------------------------
417  * Support for verifying backend compatibility of loaded modules
418  *
419  * We require dynamically-loaded modules to include the macro call
420  * PG_MODULE_MAGIC;
421  * so that we can check for obvious incompatibility, such as being compiled
422  * for a different major PostgreSQL version.
423  *
424  * To compile with versions of PostgreSQL that do not support this,
425  * you may put an #ifdef/#endif test around it. Note that in a multiple-
426  * source-file module, the macro call should only appear once.
427  *
428  * The specific items included in the magic block are intended to be ones that
429  * are custom-configurable and especially likely to break dynamically loaded
430  * modules if they were compiled with other values. Also, the length field
431  * can be used to detect definition changes.
432  *
433  * Note: we compare magic blocks with memcmp(), so there had better not be
434  * any alignment pad bytes in them.
435  *
436  * Note: when changing the contents of magic blocks, be sure to adjust the
437  * incompatible_module_error() function in dfmgr.c.
438  *-------------------------------------------------------------------------
439  */
440 
441 /* Definition of the magic block structure */
442 typedef struct
443 {
444  int len; /* sizeof(this struct) */
445  int version; /* PostgreSQL major version */
446  int funcmaxargs; /* FUNC_MAX_ARGS */
447  int indexmaxkeys; /* INDEX_MAX_KEYS */
448  int namedatalen; /* NAMEDATALEN */
449  int float4byval; /* FLOAT4PASSBYVAL */
450  int float8byval; /* FLOAT8PASSBYVAL */
452 
453 /* The actual data block contents */
454 #define PG_MODULE_MAGIC_DATA \
455 { \
456  sizeof(Pg_magic_struct), \
457  PG_VERSION_NUM / 100, \
458  FUNC_MAX_ARGS, \
459  INDEX_MAX_KEYS, \
460  NAMEDATALEN, \
461  FLOAT4PASSBYVAL, \
462  FLOAT8PASSBYVAL \
463 }
464 
465 /*
466  * Declare the module magic function. It needs to be a function as the dlsym
467  * in the backend is only guaranteed to work on functions, not data
468  */
469 typedef const Pg_magic_struct *(*PGModuleMagicFunction) (void);
470 
471 #define PG_MAGIC_FUNCTION_NAME Pg_magic_func
472 #define PG_MAGIC_FUNCTION_NAME_STRING "Pg_magic_func"
473 
474 #define PG_MODULE_MAGIC \
475 extern PGDLLEXPORT const Pg_magic_struct *PG_MAGIC_FUNCTION_NAME(void); \
476 const Pg_magic_struct * \
477 PG_MAGIC_FUNCTION_NAME(void) \
478 { \
479  static const Pg_magic_struct Pg_magic_data = PG_MODULE_MAGIC_DATA; \
480  return &Pg_magic_data; \
481 } \
482 extern int no_such_variable
483 
484 
485 /*-------------------------------------------------------------------------
486  * Support routines and macros for callers of fmgr-compatible functions
487  *-------------------------------------------------------------------------
488  */
489 
490 /* These are for invocation of a specifically named function with a
491  * directly-computed parameter list. Note that neither arguments nor result
492  * are allowed to be NULL.
493  */
494 extern Datum DirectFunctionCall1Coll(PGFunction func, Oid collation,
495  Datum arg1);
496 extern Datum DirectFunctionCall2Coll(PGFunction func, Oid collation,
497  Datum arg1, Datum arg2);
498 extern Datum DirectFunctionCall3Coll(PGFunction func, Oid collation,
499  Datum arg1, Datum arg2,
500  Datum arg3);
501 extern Datum DirectFunctionCall4Coll(PGFunction func, Oid collation,
502  Datum arg1, Datum arg2,
503  Datum arg3, Datum arg4);
504 extern Datum DirectFunctionCall5Coll(PGFunction func, Oid collation,
505  Datum arg1, Datum arg2,
506  Datum arg3, Datum arg4, Datum arg5);
507 extern Datum DirectFunctionCall6Coll(PGFunction func, Oid collation,
508  Datum arg1, Datum arg2,
509  Datum arg3, Datum arg4, Datum arg5,
510  Datum arg6);
511 extern Datum DirectFunctionCall7Coll(PGFunction func, Oid collation,
512  Datum arg1, Datum arg2,
513  Datum arg3, Datum arg4, Datum arg5,
514  Datum arg6, Datum arg7);
515 extern Datum DirectFunctionCall8Coll(PGFunction func, Oid collation,
516  Datum arg1, Datum arg2,
517  Datum arg3, Datum arg4, Datum arg5,
518  Datum arg6, Datum arg7, Datum arg8);
519 extern Datum DirectFunctionCall9Coll(PGFunction func, Oid collation,
520  Datum arg1, Datum arg2,
521  Datum arg3, Datum arg4, Datum arg5,
522  Datum arg6, Datum arg7, Datum arg8,
523  Datum arg9);
524 
525 /*
526  * These functions work like the DirectFunctionCall functions except that
527  * they use the flinfo parameter to initialise the fcinfo for the call.
528  * It's recommended that the callee only use the fn_extra and fn_mcxt
529  * fields, as other fields will typically describe the calling function
530  * not the callee. Conversely, the calling function should not have
531  * used fn_extra, unless its use is known to be compatible with the callee's.
532  */
534  Oid collation, Datum arg1);
536  Oid collation, Datum arg1, Datum arg2);
537 
538 /* These are for invocation of a previously-looked-up function with a
539  * directly-computed parameter list. Note that neither arguments nor result
540  * are allowed to be NULL.
541  */
542 extern Datum FunctionCall0Coll(FmgrInfo *flinfo, Oid collation);
543 extern Datum FunctionCall1Coll(FmgrInfo *flinfo, Oid collation,
544  Datum arg1);
545 extern Datum FunctionCall2Coll(FmgrInfo *flinfo, Oid collation,
546  Datum arg1, Datum arg2);
547 extern Datum FunctionCall3Coll(FmgrInfo *flinfo, Oid collation,
548  Datum arg1, Datum arg2,
549  Datum arg3);
550 extern Datum FunctionCall4Coll(FmgrInfo *flinfo, Oid collation,
551  Datum arg1, Datum arg2,
552  Datum arg3, Datum arg4);
553 extern Datum FunctionCall5Coll(FmgrInfo *flinfo, Oid collation,
554  Datum arg1, Datum arg2,
555  Datum arg3, Datum arg4, Datum arg5);
556 extern Datum FunctionCall6Coll(FmgrInfo *flinfo, Oid collation,
557  Datum arg1, Datum arg2,
558  Datum arg3, Datum arg4, Datum arg5,
559  Datum arg6);
560 extern Datum FunctionCall7Coll(FmgrInfo *flinfo, Oid collation,
561  Datum arg1, Datum arg2,
562  Datum arg3, Datum arg4, Datum arg5,
563  Datum arg6, Datum arg7);
564 extern Datum FunctionCall8Coll(FmgrInfo *flinfo, Oid collation,
565  Datum arg1, Datum arg2,
566  Datum arg3, Datum arg4, Datum arg5,
567  Datum arg6, Datum arg7, Datum arg8);
568 extern Datum FunctionCall9Coll(FmgrInfo *flinfo, Oid collation,
569  Datum arg1, Datum arg2,
570  Datum arg3, Datum arg4, Datum arg5,
571  Datum arg6, Datum arg7, Datum arg8,
572  Datum arg9);
573 
574 /* These are for invocation of a function identified by OID with a
575  * directly-computed parameter list. Note that neither arguments nor result
576  * are allowed to be NULL. These are essentially fmgr_info() followed by
577  * FunctionCallN(). If the same function is to be invoked repeatedly, do the
578  * fmgr_info() once and then use FunctionCallN().
579  */
580 extern Datum OidFunctionCall0Coll(Oid functionId, Oid collation);
581 extern Datum OidFunctionCall1Coll(Oid functionId, Oid collation,
582  Datum arg1);
583 extern Datum OidFunctionCall2Coll(Oid functionId, Oid collation,
584  Datum arg1, Datum arg2);
585 extern Datum OidFunctionCall3Coll(Oid functionId, Oid collation,
586  Datum arg1, Datum arg2,
587  Datum arg3);
588 extern Datum OidFunctionCall4Coll(Oid functionId, Oid collation,
589  Datum arg1, Datum arg2,
590  Datum arg3, Datum arg4);
591 extern Datum OidFunctionCall5Coll(Oid functionId, Oid collation,
592  Datum arg1, Datum arg2,
593  Datum arg3, Datum arg4, Datum arg5);
594 extern Datum OidFunctionCall6Coll(Oid functionId, Oid collation,
595  Datum arg1, Datum arg2,
596  Datum arg3, Datum arg4, Datum arg5,
597  Datum arg6);
598 extern Datum OidFunctionCall7Coll(Oid functionId, Oid collation,
599  Datum arg1, Datum arg2,
600  Datum arg3, Datum arg4, Datum arg5,
601  Datum arg6, Datum arg7);
602 extern Datum OidFunctionCall8Coll(Oid functionId, Oid collation,
603  Datum arg1, Datum arg2,
604  Datum arg3, Datum arg4, Datum arg5,
605  Datum arg6, Datum arg7, Datum arg8);
606 extern Datum OidFunctionCall9Coll(Oid functionId, Oid collation,
607  Datum arg1, Datum arg2,
608  Datum arg3, Datum arg4, Datum arg5,
609  Datum arg6, Datum arg7, Datum arg8,
610  Datum arg9);
611 
612 /* These macros allow the collation argument to be omitted (with a default of
613  * InvalidOid, ie, no collation). They exist mostly for backwards
614  * compatibility of source code.
615  */
616 #define DirectFunctionCall1(func, arg1) \
617  DirectFunctionCall1Coll(func, InvalidOid, arg1)
618 #define DirectFunctionCall2(func, arg1, arg2) \
619  DirectFunctionCall2Coll(func, InvalidOid, arg1, arg2)
620 #define DirectFunctionCall3(func, arg1, arg2, arg3) \
621  DirectFunctionCall3Coll(func, InvalidOid, arg1, arg2, arg3)
622 #define DirectFunctionCall4(func, arg1, arg2, arg3, arg4) \
623  DirectFunctionCall4Coll(func, InvalidOid, arg1, arg2, arg3, arg4)
624 #define DirectFunctionCall5(func, arg1, arg2, arg3, arg4, arg5) \
625  DirectFunctionCall5Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5)
626 #define DirectFunctionCall6(func, arg1, arg2, arg3, arg4, arg5, arg6) \
627  DirectFunctionCall6Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6)
628 #define DirectFunctionCall7(func, arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
629  DirectFunctionCall7Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
630 #define DirectFunctionCall8(func, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8) \
631  DirectFunctionCall8Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)
632 #define DirectFunctionCall9(func, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9) \
633  DirectFunctionCall9Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9)
634 #define FunctionCall1(flinfo, arg1) \
635  FunctionCall1Coll(flinfo, InvalidOid, arg1)
636 #define FunctionCall2(flinfo, arg1, arg2) \
637  FunctionCall2Coll(flinfo, InvalidOid, arg1, arg2)
638 #define FunctionCall3(flinfo, arg1, arg2, arg3) \
639  FunctionCall3Coll(flinfo, InvalidOid, arg1, arg2, arg3)
640 #define FunctionCall4(flinfo, arg1, arg2, arg3, arg4) \
641  FunctionCall4Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4)
642 #define FunctionCall5(flinfo, arg1, arg2, arg3, arg4, arg5) \
643  FunctionCall5Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5)
644 #define FunctionCall6(flinfo, arg1, arg2, arg3, arg4, arg5, arg6) \
645  FunctionCall6Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6)
646 #define FunctionCall7(flinfo, arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
647  FunctionCall7Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
648 #define FunctionCall8(flinfo, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8) \
649  FunctionCall8Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)
650 #define FunctionCall9(flinfo, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9) \
651  FunctionCall9Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9)
652 #define OidFunctionCall0(functionId) \
653  OidFunctionCall0Coll(functionId, InvalidOid)
654 #define OidFunctionCall1(functionId, arg1) \
655  OidFunctionCall1Coll(functionId, InvalidOid, arg1)
656 #define OidFunctionCall2(functionId, arg1, arg2) \
657  OidFunctionCall2Coll(functionId, InvalidOid, arg1, arg2)
658 #define OidFunctionCall3(functionId, arg1, arg2, arg3) \
659  OidFunctionCall3Coll(functionId, InvalidOid, arg1, arg2, arg3)
660 #define OidFunctionCall4(functionId, arg1, arg2, arg3, arg4) \
661  OidFunctionCall4Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4)
662 #define OidFunctionCall5(functionId, arg1, arg2, arg3, arg4, arg5) \
663  OidFunctionCall5Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5)
664 #define OidFunctionCall6(functionId, arg1, arg2, arg3, arg4, arg5, arg6) \
665  OidFunctionCall6Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6)
666 #define OidFunctionCall7(functionId, arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
667  OidFunctionCall7Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
668 #define OidFunctionCall8(functionId, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8) \
669  OidFunctionCall8Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)
670 #define OidFunctionCall9(functionId, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9) \
671  OidFunctionCall9Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9)
672 
673 
674 /* Special cases for convenient invocation of datatype I/O functions. */
675 extern Datum InputFunctionCall(FmgrInfo *flinfo, char *str,
676  Oid typioparam, int32 typmod);
677 extern Datum OidInputFunctionCall(Oid functionId, char *str,
678  Oid typioparam, int32 typmod);
679 extern char *OutputFunctionCall(FmgrInfo *flinfo, Datum val);
680 extern char *OidOutputFunctionCall(Oid functionId, Datum val);
681 extern Datum ReceiveFunctionCall(FmgrInfo *flinfo, fmStringInfo buf,
682  Oid typioparam, int32 typmod);
683 extern Datum OidReceiveFunctionCall(Oid functionId, fmStringInfo buf,
684  Oid typioparam, int32 typmod);
685 extern bytea *SendFunctionCall(FmgrInfo *flinfo, Datum val);
686 extern bytea *OidSendFunctionCall(Oid functionId, Datum val);
687 
688 
689 /*
690  * Routines in fmgr.c
691  */
692 extern const Pg_finfo_record *fetch_finfo_record(void *filehandle, const char *funcname);
693 extern void clear_external_function_hash(void *filehandle);
694 extern Oid fmgr_internal_function(const char *proname);
695 extern Oid get_fn_expr_rettype(FmgrInfo *flinfo);
696 extern Oid get_fn_expr_argtype(FmgrInfo *flinfo, int argnum);
697 extern Oid get_call_expr_argtype(fmNodePtr expr, int argnum);
698 extern bool get_fn_expr_arg_stable(FmgrInfo *flinfo, int argnum);
699 extern bool get_call_expr_arg_stable(fmNodePtr expr, int argnum);
700 extern bool get_fn_expr_variadic(FmgrInfo *flinfo);
701 extern bool CheckFunctionValidatorAccess(Oid validatorOid, Oid functionOid);
702 
703 /*
704  * Routines in dfmgr.c
705  */
706 extern char *Dynamic_library_path;
707 
708 extern PGFunction load_external_function(const char *filename, const char *funcname,
709  bool signalNotFound, void **filehandle);
710 extern PGFunction lookup_external_function(void *filehandle, const char *funcname);
711 extern void load_file(const char *filename, bool restricted);
712 extern void **find_rendezvous_variable(const char *varName);
713 extern Size EstimateLibraryStateSpace(void);
714 extern void SerializeLibraryState(Size maxsize, char *start_address);
715 extern void RestoreLibraryState(char *start_address);
716 
717 /*
718  * Support for aggregate functions
719  *
720  * These are actually in executor/nodeAgg.c, but we declare them here since
721  * the whole point is for callers to not be overly friendly with nodeAgg.
722  */
723 
724 /* AggCheckCallContext can return one of the following codes, or 0: */
725 #define AGG_CONTEXT_AGGREGATE 1 /* regular aggregate */
726 #define AGG_CONTEXT_WINDOW 2 /* window function */
727 
728 extern int AggCheckCallContext(FunctionCallInfo fcinfo,
729  MemoryContext *aggcontext);
730 extern fmAggrefPtr AggGetAggref(FunctionCallInfo fcinfo);
731 extern MemoryContext AggGetTempMemoryContext(FunctionCallInfo fcinfo);
732 extern bool AggStateIsShared(FunctionCallInfo fcinfo);
733 extern void AggRegisterCallback(FunctionCallInfo fcinfo,
735  Datum arg);
736 
737 /*
738  * We allow plugin modules to hook function entry/exit. This is intended
739  * as support for loadable security policy modules, which may want to
740  * perform additional privilege checks on function entry or exit, or to do
741  * other internal bookkeeping. To make this possible, such modules must be
742  * able not only to support normal function entry and exit, but also to trap
743  * the case where we bail out due to an error; and they must also be able to
744  * prevent inlining.
745  */
746 typedef enum FmgrHookEventType
747 {
752 
754 
755 typedef void (*fmgr_hook_type) (FmgrHookEventType event,
756  FmgrInfo *flinfo, Datum *arg);
757 
760 
761 #define FmgrHookIsNeeded(fn_oid) \
762  (!needs_fmgr_hook ? false : (*needs_fmgr_hook)(fn_oid))
763 
764 #endif /* FMGR_H */
Datum CallerFInfoFunctionCall2(PGFunction func, FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2)
Definition: fmgr.c:1086
int AggCheckCallContext(FunctionCallInfo fcinfo, MemoryContext *aggcontext)
Definition: nodeAgg.c:3541
fmAggrefPtr AggGetAggref(FunctionCallInfo fcinfo)
Definition: nodeAgg.c:3585
void(* fmExprContextCallbackFunction)(Datum arg)
Definition: fmgr.h:26
Datum(* PGFunction)(FunctionCallInfo fcinfo)
Definition: fmgr.h:40
Definition: fmgr.h:56
Oid get_fn_expr_rettype(FmgrInfo *flinfo)
Definition: fmgr.c:1795
PGDLLIMPORT fmgr_hook_type fmgr_hook
Definition: fmgr.c:37
Datum OidFunctionCall9Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6, Datum arg7, Datum arg8, Datum arg9)
Definition: fmgr.c:1504
short fn_nargs
Definition: fmgr.h:60
NameData proname
Definition: pg_proc.h:36
struct StringInfoData * fmStringInfo
Definition: fmgr.h:29
bool get_call_expr_arg_stable(fmNodePtr expr, int argnum)
MemoryContext fn_mcxt
Definition: fmgr.h:65
int indexmaxkeys
Definition: fmgr.h:447
char * OutputFunctionCall(FmgrInfo *flinfo, Datum val)
Definition: fmgr.c:1575
Oid get_call_expr_argtype(fmNodePtr expr, int argnum)
PGFunction fn_addr
Definition: fmgr.h:58
Datum FunctionCall2Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2)
Definition: fmgr.c:1150
void(* fmgr_hook_type)(FmgrHookEventType event, FmgrInfo *flinfo, Datum *arg)
Definition: fmgr.h:755
Datum DirectFunctionCall8Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6, Datum arg7, Datum arg8)
Definition: fmgr.c:982
Datum CallerFInfoFunctionCall1(PGFunction func, FmgrInfo *flinfo, Oid collation, Datum arg1)
Definition: fmgr.c:1066
Datum ReceiveFunctionCall(FmgrInfo *flinfo, fmStringInfo buf, Oid typioparam, int32 typmod)
Definition: fmgr.c:1589
int namedatalen
Definition: fmgr.h:448
Datum FunctionCall4Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4)
Definition: fmgr.c:1197
Datum DirectFunctionCall4Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4)
Definition: fmgr.c:860
Definition: nodes.h:524
fmNodePtr context
Definition: fmgr.h:88
char * OidOutputFunctionCall(Oid functionId, Datum val)
Definition: fmgr.c:1655
Datum FunctionCall6Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6)
Definition: fmgr.c:1253
unsigned int Oid
Definition: postgres_ext.h:31
Datum FunctionCall7Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6, Datum arg7)
Definition: fmgr.c:1285
Datum OidFunctionCall3Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3)
Definition: fmgr.c:1432
Datum DirectFunctionCall7Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6, Datum arg7)
Definition: fmgr.c:948
struct varlena * pg_detoast_datum_packed(struct varlena *datum)
Definition: fmgr.c:1771
#define PGDLLIMPORT
Definition: c.h:1229
signed int int32
Definition: c.h:346
Size EstimateLibraryStateSpace(void)
Definition: dfmgr.c:719
PGFunction lookup_external_function(void *filehandle, const char *funcname)
Definition: dfmgr.c:171
bool get_fn_expr_variadic(FmgrInfo *flinfo)
Definition: fmgr.c:1951
bool AggStateIsShared(FunctionCallInfo fcinfo)
Definition: nodeAgg.c:3645
struct Aggref * fmAggrefPtr
Definition: fmgr.h:23
Oid get_fn_expr_argtype(FmgrInfo *flinfo, int argnum)
Definition: fmgr.c:1817
Datum FunctionCall5Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5)
Definition: fmgr.c:1224
bytea * SendFunctionCall(FmgrInfo *flinfo, Datum val)
Definition: fmgr.c:1636
bool fn_retset
Definition: fmgr.h:62
const Pg_finfo_record * fetch_finfo_record(void *filehandle, const char *funcname)
Definition: fmgr.c:470
void fmgr_info_copy(FmgrInfo *dstinfo, FmgrInfo *srcinfo, MemoryContext destcxt)
Definition: fmgr.c:610
bool fn_strict
Definition: fmgr.h:61
void fmgr_info_cxt(Oid functionId, FmgrInfo *finfo, MemoryContext mcxt)
Definition: fmgr.c:134
MemoryContext AggGetTempMemoryContext(FunctionCallInfo fcinfo)
Definition: nodeAgg.c:3619
bool(* needs_fmgr_hook_type)(Oid fn_oid)
Definition: fmgr.h:753
fmNodePtr resultinfo
Definition: fmgr.h:89
Datum DirectFunctionCall2Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2)
Definition: fmgr.c:813
Datum OidFunctionCall1Coll(Oid functionId, Oid collation, Datum arg1)
Definition: fmgr.c:1412
bool CheckFunctionValidatorAccess(Oid validatorOid, Oid functionOid)
Definition: fmgr.c:2001
static char * buf
Definition: pg_test_fsync.c:68
FmgrHookEventType
Definition: fmgr.h:746
Datum OidFunctionCall6Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6)
Definition: fmgr.c:1465
int funcmaxargs
Definition: fmgr.h:446
Definition: fmgr.h:749
PGDLLIMPORT needs_fmgr_hook_type needs_fmgr_hook
Definition: fmgr.c:36
Datum FunctionCall3Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3)
Definition: fmgr.c:1172
Datum DirectFunctionCall5Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5)
Definition: fmgr.c:887
Datum OidFunctionCall2Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2)
Definition: fmgr.c:1422
int float8byval
Definition: fmgr.h:450
Datum InputFunctionCall(FmgrInfo *flinfo, char *str, Oid typioparam, int32 typmod)
Definition: fmgr.c:1531
uintptr_t Datum
Definition: postgres.h:367
FmgrInfo * flinfo
Definition: fmgr.h:87
struct FunctionCallInfoBaseData * FunctionCallInfo
Definition: fmgr.h:38
void fmgr_info(Oid functionId, FmgrInfo *finfo)
Definition: fmgr.c:124
Datum OidReceiveFunctionCall(Oid functionId, fmStringInfo buf, Oid typioparam, int32 typmod)
Definition: fmgr.c:1664
Oid fn_oid
Definition: fmgr.h:59
void clear_external_function_hash(void *filehandle)
Definition: fmgr.c:594
void load_file(const char *filename, bool restricted)
Definition: dfmgr.c:146
static void * fn(void *arg)
void AggRegisterCallback(FunctionCallInfo fcinfo, fmExprContextCallbackFunction func, Datum arg)
Definition: nodeAgg.c:3684
void ** find_rendezvous_variable(const char *varName)
Definition: dfmgr.c:680
Datum DirectFunctionCall6Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6)
Definition: fmgr.c:916
struct varlena * pg_detoast_datum_copy(struct varlena *datum)
Definition: fmgr.c:1748
void fmgr_symbol(Oid functionId, char **mod, char **fn)
Definition: fmgr.c:281
fmNodePtr fn_expr
Definition: fmgr.h:66
Datum DirectFunctionCall9Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6, Datum arg7, Datum arg8, Datum arg9)
Definition: fmgr.c:1018
Datum OidFunctionCall4Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4)
Definition: fmgr.c:1443
Datum FunctionCall8Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6, Datum arg7, Datum arg8)
Definition: fmgr.c:1319
size_t Size
Definition: c.h:466
struct FmgrInfo FmgrInfo
struct Node * fmNodePtr
Definition: fmgr.h:22
Datum FunctionCall1Coll(FmgrInfo *flinfo, Oid collation, Datum arg1)
Definition: fmgr.c:1130
void * fn_extra
Definition: fmgr.h:64
int float4byval
Definition: fmgr.h:449
Datum OidInputFunctionCall(Oid functionId, char *str, Oid typioparam, int32 typmod)
Definition: fmgr.c:1646
static char * filename
Definition: pg_dumpall.c:91
void RestoreLibraryState(char *start_address)
Definition: dfmgr.c:758
void SerializeLibraryState(Size maxsize, char *start_address)
Definition: dfmgr.c:736
PGFunction load_external_function(const char *filename, const char *funcname, bool signalNotFound, void **filehandle)
Definition: dfmgr.c:107
unsigned char fn_stats
Definition: fmgr.h:63
bytea * OidSendFunctionCall(Oid functionId, Datum val)
Definition: fmgr.c:1674
struct FunctionCallInfoBaseData FunctionCallInfoBaseData
bool get_fn_expr_arg_stable(FmgrInfo *flinfo, int argnum)
Definition: fmgr.c:1882
Datum FunctionCall0Coll(FmgrInfo *flinfo, Oid collation)
Definition: fmgr.c:1113
void * arg
Definition: c.h:549
Datum OidFunctionCall0Coll(Oid functionId, Oid collation)
Definition: fmgr.c:1402
Datum OidFunctionCall5Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5)
Definition: fmgr.c:1454
Datum DirectFunctionCall3Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3)
Definition: fmgr.c:835
Datum DirectFunctionCall1Coll(PGFunction func, Oid collation, Datum arg1)
Definition: fmgr.c:793
Oid fmgr_internal_function(const char *proname)
Definition: fmgr.c:625
struct varlena * pg_detoast_datum(struct varlena *datum)
Definition: fmgr.c:1739
struct varlena * pg_detoast_datum_slice(struct varlena *datum, int32 first, int32 count)
Definition: fmgr.c:1764
Datum OidFunctionCall7Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6, Datum arg7)
Definition: fmgr.c:1478
int api_version
Definition: fmgr.h:385
long val
Definition: informix.c:689
char * Dynamic_library_path
Definition: dfmgr.c:77
Datum OidFunctionCall8Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6, Datum arg7, Datum arg8)
Definition: fmgr.c:1491
int version
Definition: fmgr.h:445
unsigned char bool
Definition: c.h:308
Datum FunctionCall9Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6, Datum arg7, Datum arg8, Datum arg9)
Definition: fmgr.c:1355