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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) 1996-2020, 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
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  * Some code performs multiple calls without redoing InitFunctionCallInfoData,
168  * possibly altering the argument values. This is okay, but be sure to reset
169  * the fcinfo->isnull flag before each call, since callees are permitted to
170  * assume that starts out false.
171  */
172 #define FunctionCallInvoke(fcinfo) ((* (fcinfo)->flinfo->fn_addr) (fcinfo))
173 
174 
175 /*-------------------------------------------------------------------------
176  * Support macros to ease writing fmgr-compatible functions
177  *
178  * A C-coded fmgr-compatible function should be declared as
179  *
180  * Datum
181  * function_name(PG_FUNCTION_ARGS)
182  * {
183  * ...
184  * }
185  *
186  * It should access its arguments using appropriate PG_GETARG_xxx macros
187  * and should return its result using PG_RETURN_xxx.
188  *
189  *-------------------------------------------------------------------------
190  */
191 
192 /* Standard parameter list for fmgr-compatible functions */
193 #define PG_FUNCTION_ARGS FunctionCallInfo fcinfo
194 
195 /*
196  * Get collation function should use.
197  */
198 #define PG_GET_COLLATION() (fcinfo->fncollation)
199 
200 /*
201  * Get number of arguments passed to function.
202  */
203 #define PG_NARGS() (fcinfo->nargs)
204 
205 /*
206  * If function is not marked "proisstrict" in pg_proc, it must check for
207  * null arguments using this macro. Do not try to GETARG a null argument!
208  */
209 #define PG_ARGISNULL(n) (fcinfo->args[n].isnull)
210 
211 /*
212  * Support for fetching detoasted copies of toastable datatypes (all of
213  * which are varlena types). pg_detoast_datum() gives you either the input
214  * datum (if not toasted) or a detoasted copy allocated with palloc().
215  * pg_detoast_datum_copy() always gives you a palloc'd copy --- use it
216  * if you need a modifiable copy of the input. Caller is expected to have
217  * checked for null inputs first, if necessary.
218  *
219  * pg_detoast_datum_packed() will return packed (1-byte header) datums
220  * unmodified. It will still expand an externally toasted or compressed datum.
221  * The resulting datum can be accessed using VARSIZE_ANY() and VARDATA_ANY()
222  * (beware of multiple evaluations in those macros!)
223  *
224  * In consumers oblivious to data alignment, call PG_DETOAST_DATUM_PACKED(),
225  * VARDATA_ANY(), VARSIZE_ANY() and VARSIZE_ANY_EXHDR(). Elsewhere, call
226  * PG_DETOAST_DATUM(), VARDATA() and VARSIZE(). Directly fetching an int16,
227  * int32 or wider field in the struct representing the datum layout requires
228  * aligned data. memcpy() is alignment-oblivious, as are most operations on
229  * datatypes, such as text, whose layout struct contains only char fields.
230  *
231  * Note: it'd be nice if these could be macros, but I see no way to do that
232  * without evaluating the arguments multiple times, which is NOT acceptable.
233  */
234 extern struct varlena *pg_detoast_datum(struct varlena *datum);
235 extern struct varlena *pg_detoast_datum_copy(struct varlena *datum);
236 extern struct varlena *pg_detoast_datum_slice(struct varlena *datum,
237  int32 first, int32 count);
238 extern struct varlena *pg_detoast_datum_packed(struct varlena *datum);
239 
240 #define PG_DETOAST_DATUM(datum) \
241  pg_detoast_datum((struct varlena *) DatumGetPointer(datum))
242 #define PG_DETOAST_DATUM_COPY(datum) \
243  pg_detoast_datum_copy((struct varlena *) DatumGetPointer(datum))
244 #define PG_DETOAST_DATUM_SLICE(datum,f,c) \
245  pg_detoast_datum_slice((struct varlena *) DatumGetPointer(datum), \
246  (int32) (f), (int32) (c))
247 /* WARNING -- unaligned pointer */
248 #define PG_DETOAST_DATUM_PACKED(datum) \
249  pg_detoast_datum_packed((struct varlena *) DatumGetPointer(datum))
250 
251 /*
252  * Support for cleaning up detoasted copies of inputs. This must only
253  * be used for pass-by-ref datatypes, and normally would only be used
254  * for toastable types. If the given pointer is different from the
255  * original argument, assume it's a palloc'd detoasted copy, and pfree it.
256  * NOTE: most functions on toastable types do not have to worry about this,
257  * but we currently require that support functions for indexes not leak
258  * memory.
259  */
260 #define PG_FREE_IF_COPY(ptr,n) \
261  do { \
262  if ((Pointer) (ptr) != PG_GETARG_POINTER(n)) \
263  pfree(ptr); \
264  } while (0)
265 
266 /* Macros for fetching arguments of standard types */
267 
268 #define PG_GETARG_DATUM(n) (fcinfo->args[n].value)
269 #define PG_GETARG_INT32(n) DatumGetInt32(PG_GETARG_DATUM(n))
270 #define PG_GETARG_UINT32(n) DatumGetUInt32(PG_GETARG_DATUM(n))
271 #define PG_GETARG_INT16(n) DatumGetInt16(PG_GETARG_DATUM(n))
272 #define PG_GETARG_UINT16(n) DatumGetUInt16(PG_GETARG_DATUM(n))
273 #define PG_GETARG_CHAR(n) DatumGetChar(PG_GETARG_DATUM(n))
274 #define PG_GETARG_BOOL(n) DatumGetBool(PG_GETARG_DATUM(n))
275 #define PG_GETARG_OID(n) DatumGetObjectId(PG_GETARG_DATUM(n))
276 #define PG_GETARG_POINTER(n) DatumGetPointer(PG_GETARG_DATUM(n))
277 #define PG_GETARG_CSTRING(n) DatumGetCString(PG_GETARG_DATUM(n))
278 #define PG_GETARG_NAME(n) DatumGetName(PG_GETARG_DATUM(n))
279 /* these macros hide the pass-by-reference-ness of the datatype: */
280 #define PG_GETARG_FLOAT4(n) DatumGetFloat4(PG_GETARG_DATUM(n))
281 #define PG_GETARG_FLOAT8(n) DatumGetFloat8(PG_GETARG_DATUM(n))
282 #define PG_GETARG_INT64(n) DatumGetInt64(PG_GETARG_DATUM(n))
283 /* use this if you want the raw, possibly-toasted input datum: */
284 #define PG_GETARG_RAW_VARLENA_P(n) ((struct varlena *) PG_GETARG_POINTER(n))
285 /* use this if you want the input datum de-toasted: */
286 #define PG_GETARG_VARLENA_P(n) PG_DETOAST_DATUM(PG_GETARG_DATUM(n))
287 /* and this if you can handle 1-byte-header datums: */
288 #define PG_GETARG_VARLENA_PP(n) PG_DETOAST_DATUM_PACKED(PG_GETARG_DATUM(n))
289 /* DatumGetFoo macros for varlena types will typically look like this: */
290 #define DatumGetByteaPP(X) ((bytea *) PG_DETOAST_DATUM_PACKED(X))
291 #define DatumGetTextPP(X) ((text *) PG_DETOAST_DATUM_PACKED(X))
292 #define DatumGetBpCharPP(X) ((BpChar *) PG_DETOAST_DATUM_PACKED(X))
293 #define DatumGetVarCharPP(X) ((VarChar *) PG_DETOAST_DATUM_PACKED(X))
294 #define DatumGetHeapTupleHeader(X) ((HeapTupleHeader) PG_DETOAST_DATUM(X))
295 /* And we also offer variants that return an OK-to-write copy */
296 #define DatumGetByteaPCopy(X) ((bytea *) PG_DETOAST_DATUM_COPY(X))
297 #define DatumGetTextPCopy(X) ((text *) PG_DETOAST_DATUM_COPY(X))
298 #define DatumGetBpCharPCopy(X) ((BpChar *) PG_DETOAST_DATUM_COPY(X))
299 #define DatumGetVarCharPCopy(X) ((VarChar *) PG_DETOAST_DATUM_COPY(X))
300 #define DatumGetHeapTupleHeaderCopy(X) ((HeapTupleHeader) PG_DETOAST_DATUM_COPY(X))
301 /* Variants which return n bytes starting at pos. m */
302 #define DatumGetByteaPSlice(X,m,n) ((bytea *) PG_DETOAST_DATUM_SLICE(X,m,n))
303 #define DatumGetTextPSlice(X,m,n) ((text *) PG_DETOAST_DATUM_SLICE(X,m,n))
304 #define DatumGetBpCharPSlice(X,m,n) ((BpChar *) PG_DETOAST_DATUM_SLICE(X,m,n))
305 #define DatumGetVarCharPSlice(X,m,n) ((VarChar *) PG_DETOAST_DATUM_SLICE(X,m,n))
306 /* GETARG macros for varlena types will typically look like this: */
307 #define PG_GETARG_BYTEA_PP(n) DatumGetByteaPP(PG_GETARG_DATUM(n))
308 #define PG_GETARG_TEXT_PP(n) DatumGetTextPP(PG_GETARG_DATUM(n))
309 #define PG_GETARG_BPCHAR_PP(n) DatumGetBpCharPP(PG_GETARG_DATUM(n))
310 #define PG_GETARG_VARCHAR_PP(n) DatumGetVarCharPP(PG_GETARG_DATUM(n))
311 #define PG_GETARG_HEAPTUPLEHEADER(n) DatumGetHeapTupleHeader(PG_GETARG_DATUM(n))
312 /* And we also offer variants that return an OK-to-write copy */
313 #define PG_GETARG_BYTEA_P_COPY(n) DatumGetByteaPCopy(PG_GETARG_DATUM(n))
314 #define PG_GETARG_TEXT_P_COPY(n) DatumGetTextPCopy(PG_GETARG_DATUM(n))
315 #define PG_GETARG_BPCHAR_P_COPY(n) DatumGetBpCharPCopy(PG_GETARG_DATUM(n))
316 #define PG_GETARG_VARCHAR_P_COPY(n) DatumGetVarCharPCopy(PG_GETARG_DATUM(n))
317 #define PG_GETARG_HEAPTUPLEHEADER_COPY(n) DatumGetHeapTupleHeaderCopy(PG_GETARG_DATUM(n))
318 /* And a b-byte slice from position a -also OK to write */
319 #define PG_GETARG_BYTEA_P_SLICE(n,a,b) DatumGetByteaPSlice(PG_GETARG_DATUM(n),a,b)
320 #define PG_GETARG_TEXT_P_SLICE(n,a,b) DatumGetTextPSlice(PG_GETARG_DATUM(n),a,b)
321 #define PG_GETARG_BPCHAR_P_SLICE(n,a,b) DatumGetBpCharPSlice(PG_GETARG_DATUM(n),a,b)
322 #define PG_GETARG_VARCHAR_P_SLICE(n,a,b) DatumGetVarCharPSlice(PG_GETARG_DATUM(n),a,b)
323 /*
324  * Obsolescent variants that guarantee INT alignment for the return value.
325  * Few operations on these particular types need alignment, mainly operations
326  * that cast the VARDATA pointer to a type like int16[]. Most code should use
327  * the ...PP(X) counterpart. Nonetheless, these appear frequently in code
328  * predating the PostgreSQL 8.3 introduction of the ...PP(X) variants.
329  */
330 #define DatumGetByteaP(X) ((bytea *) PG_DETOAST_DATUM(X))
331 #define DatumGetTextP(X) ((text *) PG_DETOAST_DATUM(X))
332 #define DatumGetBpCharP(X) ((BpChar *) PG_DETOAST_DATUM(X))
333 #define DatumGetVarCharP(X) ((VarChar *) PG_DETOAST_DATUM(X))
334 #define PG_GETARG_BYTEA_P(n) DatumGetByteaP(PG_GETARG_DATUM(n))
335 #define PG_GETARG_TEXT_P(n) DatumGetTextP(PG_GETARG_DATUM(n))
336 #define PG_GETARG_BPCHAR_P(n) DatumGetBpCharP(PG_GETARG_DATUM(n))
337 #define PG_GETARG_VARCHAR_P(n) DatumGetVarCharP(PG_GETARG_DATUM(n))
338 
339 /* To access options from opclass support functions use this: */
340 #define PG_HAS_OPCLASS_OPTIONS() has_fn_opclass_options(fcinfo->flinfo)
341 #define PG_GET_OPCLASS_OPTIONS() get_fn_opclass_options(fcinfo->flinfo)
342 
343 /* To return a NULL do this: */
344 #define PG_RETURN_NULL() \
345  do { fcinfo->isnull = true; return (Datum) 0; } while (0)
346 
347 /* A few internal functions return void (which is not the same as NULL!) */
348 #define PG_RETURN_VOID() return (Datum) 0
349 
350 /* Macros for returning results of standard types */
351 
352 #define PG_RETURN_DATUM(x) return (x)
353 #define PG_RETURN_INT32(x) return Int32GetDatum(x)
354 #define PG_RETURN_UINT32(x) return UInt32GetDatum(x)
355 #define PG_RETURN_INT16(x) return Int16GetDatum(x)
356 #define PG_RETURN_UINT16(x) return UInt16GetDatum(x)
357 #define PG_RETURN_CHAR(x) return CharGetDatum(x)
358 #define PG_RETURN_BOOL(x) return BoolGetDatum(x)
359 #define PG_RETURN_OID(x) return ObjectIdGetDatum(x)
360 #define PG_RETURN_POINTER(x) return PointerGetDatum(x)
361 #define PG_RETURN_CSTRING(x) return CStringGetDatum(x)
362 #define PG_RETURN_NAME(x) return NameGetDatum(x)
363 /* these macros hide the pass-by-reference-ness of the datatype: */
364 #define PG_RETURN_FLOAT4(x) return Float4GetDatum(x)
365 #define PG_RETURN_FLOAT8(x) return Float8GetDatum(x)
366 #define PG_RETURN_INT64(x) return Int64GetDatum(x)
367 #define PG_RETURN_UINT64(x) return UInt64GetDatum(x)
368 /* RETURN macros for other pass-by-ref types will typically look like this: */
369 #define PG_RETURN_BYTEA_P(x) PG_RETURN_POINTER(x)
370 #define PG_RETURN_TEXT_P(x) PG_RETURN_POINTER(x)
371 #define PG_RETURN_BPCHAR_P(x) PG_RETURN_POINTER(x)
372 #define PG_RETURN_VARCHAR_P(x) PG_RETURN_POINTER(x)
373 #define PG_RETURN_HEAPTUPLEHEADER(x) return HeapTupleHeaderGetDatum(x)
374 
375 
376 /*-------------------------------------------------------------------------
377  * Support for detecting call convention of dynamically-loaded functions
378  *
379  * Dynamically loaded functions currently can only use the version-1 ("new
380  * style") calling convention. Version-0 ("old style") is not supported
381  * anymore. Version 1 is the call convention defined in this header file, and
382  * must be accompanied by the macro call
383  *
384  * PG_FUNCTION_INFO_V1(function_name);
385  *
386  * Note that internal functions do not need this decoration since they are
387  * assumed to be version-1.
388  *
389  *-------------------------------------------------------------------------
390  */
391 
392 typedef struct
393 {
394  int api_version; /* specifies call convention version number */
395  /* More fields may be added later, for version numbers > 1. */
397 
398 /* Expected signature of an info function */
399 typedef const Pg_finfo_record *(*PGFInfoFunction) (void);
400 
401 /*
402  * Macro to build an info function associated with the given function name.
403  *
404  * As a convenience, also provide an "extern" declaration for the given
405  * function name, so that writers of C functions need not write that too.
406  *
407  * On Windows, the function and info function must be exported. Our normal
408  * build processes take care of that via .DEF files or --export-all-symbols.
409  * Module authors using a different build process might need to manually
410  * declare the function PGDLLEXPORT. We do that automatically here for the
411  * info function, since authors shouldn't need to be explicitly aware of it.
412  */
413 #define PG_FUNCTION_INFO_V1(funcname) \
414 extern Datum funcname(PG_FUNCTION_ARGS); \
415 extern PGDLLEXPORT const Pg_finfo_record * CppConcat(pg_finfo_,funcname)(void); \
416 const Pg_finfo_record * \
417 CppConcat(pg_finfo_,funcname) (void) \
418 { \
419  static const Pg_finfo_record my_finfo = { 1 }; \
420  return &my_finfo; \
421 } \
422 extern int no_such_variable
423 
424 
425 /*-------------------------------------------------------------------------
426  * Support for verifying backend compatibility of loaded modules
427  *
428  * We require dynamically-loaded modules to include the macro call
429  * PG_MODULE_MAGIC;
430  * so that we can check for obvious incompatibility, such as being compiled
431  * for a different major PostgreSQL version.
432  *
433  * To compile with versions of PostgreSQL that do not support this,
434  * you may put an #ifdef/#endif test around it. Note that in a multiple-
435  * source-file module, the macro call should only appear once.
436  *
437  * The specific items included in the magic block are intended to be ones that
438  * are custom-configurable and especially likely to break dynamically loaded
439  * modules if they were compiled with other values. Also, the length field
440  * can be used to detect definition changes.
441  *
442  * Note: we compare magic blocks with memcmp(), so there had better not be
443  * any alignment pad bytes in them.
444  *
445  * Note: when changing the contents of magic blocks, be sure to adjust the
446  * incompatible_module_error() function in dfmgr.c.
447  *-------------------------------------------------------------------------
448  */
449 
450 /* Definition of the magic block structure */
451 typedef struct
452 {
453  int len; /* sizeof(this struct) */
454  int version; /* PostgreSQL major version */
455  int funcmaxargs; /* FUNC_MAX_ARGS */
456  int indexmaxkeys; /* INDEX_MAX_KEYS */
457  int namedatalen; /* NAMEDATALEN */
458  int float8byval; /* FLOAT8PASSBYVAL */
460 
461 /* The actual data block contents */
462 #define PG_MODULE_MAGIC_DATA \
463 { \
464  sizeof(Pg_magic_struct), \
465  PG_VERSION_NUM / 100, \
466  FUNC_MAX_ARGS, \
467  INDEX_MAX_KEYS, \
468  NAMEDATALEN, \
469  FLOAT8PASSBYVAL \
470 }
471 
472 /*
473  * Declare the module magic function. It needs to be a function as the dlsym
474  * in the backend is only guaranteed to work on functions, not data
475  */
476 typedef const Pg_magic_struct *(*PGModuleMagicFunction) (void);
477 
478 #define PG_MAGIC_FUNCTION_NAME Pg_magic_func
479 #define PG_MAGIC_FUNCTION_NAME_STRING "Pg_magic_func"
480 
481 #define PG_MODULE_MAGIC \
482 extern PGDLLEXPORT const Pg_magic_struct *PG_MAGIC_FUNCTION_NAME(void); \
483 const Pg_magic_struct * \
484 PG_MAGIC_FUNCTION_NAME(void) \
485 { \
486  static const Pg_magic_struct Pg_magic_data = PG_MODULE_MAGIC_DATA; \
487  return &Pg_magic_data; \
488 } \
489 extern int no_such_variable
490 
491 
492 /*-------------------------------------------------------------------------
493  * Support routines and macros for callers of fmgr-compatible functions
494  *-------------------------------------------------------------------------
495  */
496 
497 /* These are for invocation of a specifically named function with a
498  * directly-computed parameter list. Note that neither arguments nor result
499  * are allowed to be NULL. Also, the function cannot be one that needs to
500  * look at FmgrInfo, since there won't be any.
501  */
502 extern Datum DirectFunctionCall1Coll(PGFunction func, Oid collation,
503  Datum arg1);
504 extern Datum DirectFunctionCall2Coll(PGFunction func, Oid collation,
505  Datum arg1, Datum arg2);
506 extern Datum DirectFunctionCall3Coll(PGFunction func, Oid collation,
507  Datum arg1, Datum arg2,
508  Datum arg3);
509 extern Datum DirectFunctionCall4Coll(PGFunction func, Oid collation,
510  Datum arg1, Datum arg2,
511  Datum arg3, Datum arg4);
512 extern Datum DirectFunctionCall5Coll(PGFunction func, Oid collation,
513  Datum arg1, Datum arg2,
514  Datum arg3, Datum arg4, Datum arg5);
515 extern Datum DirectFunctionCall6Coll(PGFunction func, Oid collation,
516  Datum arg1, Datum arg2,
517  Datum arg3, Datum arg4, Datum arg5,
518  Datum arg6);
519 extern Datum DirectFunctionCall7Coll(PGFunction func, Oid collation,
520  Datum arg1, Datum arg2,
521  Datum arg3, Datum arg4, Datum arg5,
522  Datum arg6, Datum arg7);
523 extern Datum DirectFunctionCall8Coll(PGFunction func, Oid collation,
524  Datum arg1, Datum arg2,
525  Datum arg3, Datum arg4, Datum arg5,
526  Datum arg6, Datum arg7, Datum arg8);
527 extern Datum DirectFunctionCall9Coll(PGFunction func, Oid collation,
528  Datum arg1, Datum arg2,
529  Datum arg3, Datum arg4, Datum arg5,
530  Datum arg6, Datum arg7, Datum arg8,
531  Datum arg9);
532 
533 /*
534  * These functions work like the DirectFunctionCall functions except that
535  * they use the flinfo parameter to initialise the fcinfo for the call.
536  * It's recommended that the callee only use the fn_extra and fn_mcxt
537  * fields, as other fields will typically describe the calling function
538  * not the callee. Conversely, the calling function should not have
539  * used fn_extra, unless its use is known to be compatible with the callee's.
540  */
542  Oid collation, Datum arg1);
544  Oid collation, Datum arg1, Datum arg2);
545 
546 /* These are for invocation of a previously-looked-up function with a
547  * directly-computed parameter list. Note that neither arguments nor result
548  * are allowed to be NULL.
549  */
550 extern Datum FunctionCall0Coll(FmgrInfo *flinfo, Oid collation);
551 extern Datum FunctionCall1Coll(FmgrInfo *flinfo, Oid collation,
552  Datum arg1);
553 extern Datum FunctionCall2Coll(FmgrInfo *flinfo, Oid collation,
554  Datum arg1, Datum arg2);
555 extern Datum FunctionCall3Coll(FmgrInfo *flinfo, Oid collation,
556  Datum arg1, Datum arg2,
557  Datum arg3);
558 extern Datum FunctionCall4Coll(FmgrInfo *flinfo, Oid collation,
559  Datum arg1, Datum arg2,
560  Datum arg3, Datum arg4);
561 extern Datum FunctionCall5Coll(FmgrInfo *flinfo, Oid collation,
562  Datum arg1, Datum arg2,
563  Datum arg3, Datum arg4, Datum arg5);
564 extern Datum FunctionCall6Coll(FmgrInfo *flinfo, Oid collation,
565  Datum arg1, Datum arg2,
566  Datum arg3, Datum arg4, Datum arg5,
567  Datum arg6);
568 extern Datum FunctionCall7Coll(FmgrInfo *flinfo, Oid collation,
569  Datum arg1, Datum arg2,
570  Datum arg3, Datum arg4, Datum arg5,
571  Datum arg6, Datum arg7);
572 extern Datum FunctionCall8Coll(FmgrInfo *flinfo, Oid collation,
573  Datum arg1, Datum arg2,
574  Datum arg3, Datum arg4, Datum arg5,
575  Datum arg6, Datum arg7, Datum arg8);
576 extern Datum FunctionCall9Coll(FmgrInfo *flinfo, Oid collation,
577  Datum arg1, Datum arg2,
578  Datum arg3, Datum arg4, Datum arg5,
579  Datum arg6, Datum arg7, Datum arg8,
580  Datum arg9);
581 
582 /* These are for invocation of a function identified by OID with a
583  * directly-computed parameter list. Note that neither arguments nor result
584  * are allowed to be NULL. These are essentially fmgr_info() followed by
585  * FunctionCallN(). If the same function is to be invoked repeatedly, do the
586  * fmgr_info() once and then use FunctionCallN().
587  */
588 extern Datum OidFunctionCall0Coll(Oid functionId, Oid collation);
589 extern Datum OidFunctionCall1Coll(Oid functionId, Oid collation,
590  Datum arg1);
591 extern Datum OidFunctionCall2Coll(Oid functionId, Oid collation,
592  Datum arg1, Datum arg2);
593 extern Datum OidFunctionCall3Coll(Oid functionId, Oid collation,
594  Datum arg1, Datum arg2,
595  Datum arg3);
596 extern Datum OidFunctionCall4Coll(Oid functionId, Oid collation,
597  Datum arg1, Datum arg2,
598  Datum arg3, Datum arg4);
599 extern Datum OidFunctionCall5Coll(Oid functionId, Oid collation,
600  Datum arg1, Datum arg2,
601  Datum arg3, Datum arg4, Datum arg5);
602 extern Datum OidFunctionCall6Coll(Oid functionId, Oid collation,
603  Datum arg1, Datum arg2,
604  Datum arg3, Datum arg4, Datum arg5,
605  Datum arg6);
606 extern Datum OidFunctionCall7Coll(Oid functionId, Oid collation,
607  Datum arg1, Datum arg2,
608  Datum arg3, Datum arg4, Datum arg5,
609  Datum arg6, Datum arg7);
610 extern Datum OidFunctionCall8Coll(Oid functionId, Oid collation,
611  Datum arg1, Datum arg2,
612  Datum arg3, Datum arg4, Datum arg5,
613  Datum arg6, Datum arg7, Datum arg8);
614 extern Datum OidFunctionCall9Coll(Oid functionId, Oid collation,
615  Datum arg1, Datum arg2,
616  Datum arg3, Datum arg4, Datum arg5,
617  Datum arg6, Datum arg7, Datum arg8,
618  Datum arg9);
619 
620 /* These macros allow the collation argument to be omitted (with a default of
621  * InvalidOid, ie, no collation). They exist mostly for backwards
622  * compatibility of source code.
623  */
624 #define DirectFunctionCall1(func, arg1) \
625  DirectFunctionCall1Coll(func, InvalidOid, arg1)
626 #define DirectFunctionCall2(func, arg1, arg2) \
627  DirectFunctionCall2Coll(func, InvalidOid, arg1, arg2)
628 #define DirectFunctionCall3(func, arg1, arg2, arg3) \
629  DirectFunctionCall3Coll(func, InvalidOid, arg1, arg2, arg3)
630 #define DirectFunctionCall4(func, arg1, arg2, arg3, arg4) \
631  DirectFunctionCall4Coll(func, InvalidOid, arg1, arg2, arg3, arg4)
632 #define DirectFunctionCall5(func, arg1, arg2, arg3, arg4, arg5) \
633  DirectFunctionCall5Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5)
634 #define DirectFunctionCall6(func, arg1, arg2, arg3, arg4, arg5, arg6) \
635  DirectFunctionCall6Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6)
636 #define DirectFunctionCall7(func, arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
637  DirectFunctionCall7Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
638 #define DirectFunctionCall8(func, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8) \
639  DirectFunctionCall8Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)
640 #define DirectFunctionCall9(func, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9) \
641  DirectFunctionCall9Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9)
642 #define FunctionCall1(flinfo, arg1) \
643  FunctionCall1Coll(flinfo, InvalidOid, arg1)
644 #define FunctionCall2(flinfo, arg1, arg2) \
645  FunctionCall2Coll(flinfo, InvalidOid, arg1, arg2)
646 #define FunctionCall3(flinfo, arg1, arg2, arg3) \
647  FunctionCall3Coll(flinfo, InvalidOid, arg1, arg2, arg3)
648 #define FunctionCall4(flinfo, arg1, arg2, arg3, arg4) \
649  FunctionCall4Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4)
650 #define FunctionCall5(flinfo, arg1, arg2, arg3, arg4, arg5) \
651  FunctionCall5Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5)
652 #define FunctionCall6(flinfo, arg1, arg2, arg3, arg4, arg5, arg6) \
653  FunctionCall6Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6)
654 #define FunctionCall7(flinfo, arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
655  FunctionCall7Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
656 #define FunctionCall8(flinfo, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8) \
657  FunctionCall8Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)
658 #define FunctionCall9(flinfo, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9) \
659  FunctionCall9Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9)
660 #define OidFunctionCall0(functionId) \
661  OidFunctionCall0Coll(functionId, InvalidOid)
662 #define OidFunctionCall1(functionId, arg1) \
663  OidFunctionCall1Coll(functionId, InvalidOid, arg1)
664 #define OidFunctionCall2(functionId, arg1, arg2) \
665  OidFunctionCall2Coll(functionId, InvalidOid, arg1, arg2)
666 #define OidFunctionCall3(functionId, arg1, arg2, arg3) \
667  OidFunctionCall3Coll(functionId, InvalidOid, arg1, arg2, arg3)
668 #define OidFunctionCall4(functionId, arg1, arg2, arg3, arg4) \
669  OidFunctionCall4Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4)
670 #define OidFunctionCall5(functionId, arg1, arg2, arg3, arg4, arg5) \
671  OidFunctionCall5Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5)
672 #define OidFunctionCall6(functionId, arg1, arg2, arg3, arg4, arg5, arg6) \
673  OidFunctionCall6Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6)
674 #define OidFunctionCall7(functionId, arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
675  OidFunctionCall7Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
676 #define OidFunctionCall8(functionId, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8) \
677  OidFunctionCall8Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)
678 #define OidFunctionCall9(functionId, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9) \
679  OidFunctionCall9Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9)
680 
681 
682 /* Special cases for convenient invocation of datatype I/O functions. */
683 extern Datum InputFunctionCall(FmgrInfo *flinfo, char *str,
684  Oid typioparam, int32 typmod);
685 extern Datum OidInputFunctionCall(Oid functionId, char *str,
686  Oid typioparam, int32 typmod);
687 extern char *OutputFunctionCall(FmgrInfo *flinfo, Datum val);
688 extern char *OidOutputFunctionCall(Oid functionId, Datum val);
689 extern Datum ReceiveFunctionCall(FmgrInfo *flinfo, fmStringInfo buf,
690  Oid typioparam, int32 typmod);
691 extern Datum OidReceiveFunctionCall(Oid functionId, fmStringInfo buf,
692  Oid typioparam, int32 typmod);
693 extern bytea *SendFunctionCall(FmgrInfo *flinfo, Datum val);
694 extern bytea *OidSendFunctionCall(Oid functionId, Datum val);
695 
696 
697 /*
698  * Routines in fmgr.c
699  */
700 extern const Pg_finfo_record *fetch_finfo_record(void *filehandle, const char *funcname);
701 extern void clear_external_function_hash(void *filehandle);
702 extern Oid fmgr_internal_function(const char *proname);
703 extern Oid get_fn_expr_rettype(FmgrInfo *flinfo);
704 extern Oid get_fn_expr_argtype(FmgrInfo *flinfo, int argnum);
705 extern Oid get_call_expr_argtype(fmNodePtr expr, int argnum);
706 extern bool get_fn_expr_arg_stable(FmgrInfo *flinfo, int argnum);
707 extern bool get_call_expr_arg_stable(fmNodePtr expr, int argnum);
708 extern bool get_fn_expr_variadic(FmgrInfo *flinfo);
709 extern bytea *get_fn_opclass_options(FmgrInfo *flinfo);
710 extern bool has_fn_opclass_options(FmgrInfo *flinfo);
711 extern void set_fn_opclass_options(FmgrInfo *flinfo, bytea *options);
712 extern bool CheckFunctionValidatorAccess(Oid validatorOid, Oid functionOid);
713 
714 /*
715  * Routines in dfmgr.c
716  */
717 extern char *Dynamic_library_path;
718 
719 extern void *load_external_function(const char *filename, const char *funcname,
720  bool signalNotFound, void **filehandle);
721 extern void *lookup_external_function(void *filehandle, const char *funcname);
722 extern void load_file(const char *filename, bool restricted);
723 extern void **find_rendezvous_variable(const char *varName);
724 extern Size EstimateLibraryStateSpace(void);
725 extern void SerializeLibraryState(Size maxsize, char *start_address);
726 extern void RestoreLibraryState(char *start_address);
727 
728 /*
729  * Support for aggregate functions
730  *
731  * These are actually in executor/nodeAgg.c, but we declare them here since
732  * the whole point is for callers to not be overly friendly with nodeAgg.
733  */
734 
735 /* AggCheckCallContext can return one of the following codes, or 0: */
736 #define AGG_CONTEXT_AGGREGATE 1 /* regular aggregate */
737 #define AGG_CONTEXT_WINDOW 2 /* window function */
738 
739 extern int AggCheckCallContext(FunctionCallInfo fcinfo,
740  MemoryContext *aggcontext);
741 extern fmAggrefPtr AggGetAggref(FunctionCallInfo fcinfo);
742 extern MemoryContext AggGetTempMemoryContext(FunctionCallInfo fcinfo);
743 extern bool AggStateIsShared(FunctionCallInfo fcinfo);
744 extern void AggRegisterCallback(FunctionCallInfo fcinfo,
746  Datum arg);
747 
748 /*
749  * We allow plugin modules to hook function entry/exit. This is intended
750  * as support for loadable security policy modules, which may want to
751  * perform additional privilege checks on function entry or exit, or to do
752  * other internal bookkeeping. To make this possible, such modules must be
753  * able not only to support normal function entry and exit, but also to trap
754  * the case where we bail out due to an error; and they must also be able to
755  * prevent inlining.
756  */
757 typedef enum FmgrHookEventType
758 {
763 
765 
766 typedef void (*fmgr_hook_type) (FmgrHookEventType event,
767  FmgrInfo *flinfo, Datum *arg);
768 
771 
772 #define FmgrHookIsNeeded(fn_oid) \
773  (!needs_fmgr_hook ? false : (*needs_fmgr_hook)(fn_oid))
774 
775 #endif /* FMGR_H */
Datum CallerFInfoFunctionCall2(PGFunction func, FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2)
Definition: fmgr.c:1088
int AggCheckCallContext(FunctionCallInfo fcinfo, MemoryContext *aggcontext)
Definition: nodeAgg.c:4778
fmAggrefPtr AggGetAggref(FunctionCallInfo fcinfo)
Definition: nodeAgg.c:4822
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:1782
bool has_fn_opclass_options(FmgrInfo *flinfo)
Definition: fmgr.c:1975
PGDLLIMPORT fmgr_hook_type fmgr_hook
Definition: fmgr.c:39
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:1506
short fn_nargs
Definition: fmgr.h:60
NameData proname
Definition: pg_proc.h:35
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:456
char * OutputFunctionCall(FmgrInfo *flinfo, Datum val)
Definition: fmgr.c:1577
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:1152
void(* fmgr_hook_type)(FmgrHookEventType event, FmgrInfo *flinfo, Datum *arg)
Definition: fmgr.h:766
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:984
Datum CallerFInfoFunctionCall1(PGFunction func, FmgrInfo *flinfo, Oid collation, Datum arg1)
Definition: fmgr.c:1068
Datum ReceiveFunctionCall(FmgrInfo *flinfo, fmStringInfo buf, Oid typioparam, int32 typmod)
Definition: fmgr.c:1591
int namedatalen
Definition: fmgr.h:457
Datum FunctionCall4Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4)
Definition: fmgr.c:1199
Datum DirectFunctionCall4Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4)
Definition: fmgr.c:862
void set_fn_opclass_options(FmgrInfo *flinfo, bytea *options)
Definition: fmgr.c:1964
#define FLEXIBLE_ARRAY_MEMBER
Definition: c.h:284
Definition: nodes.h:528
fmNodePtr context
Definition: fmgr.h:88
char * OidOutputFunctionCall(Oid functionId, Datum val)
Definition: fmgr.c:1657
Datum FunctionCall6Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6)
Definition: fmgr.c:1255
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:1287
Datum OidFunctionCall3Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3)
Definition: fmgr.c:1434
Datum DirectFunctionCall7Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6, Datum arg7)
Definition: fmgr.c:950
struct varlena * pg_detoast_datum_packed(struct varlena *datum)
Definition: fmgr.c:1758
#define PGDLLIMPORT
Definition: c.h:1259
signed int int32
Definition: c.h:363
Size EstimateLibraryStateSpace(void)
Definition: dfmgr.c:710
bool get_fn_expr_variadic(FmgrInfo *flinfo)
Definition: fmgr.c:1938
bool AggStateIsShared(FunctionCallInfo fcinfo)
Definition: nodeAgg.c:4882
struct Aggref * fmAggrefPtr
Definition: fmgr.h:23
Oid get_fn_expr_argtype(FmgrInfo *flinfo, int argnum)
Definition: fmgr.c:1804
Datum FunctionCall5Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5)
Definition: fmgr.c:1226
bytea * SendFunctionCall(FmgrInfo *flinfo, Datum val)
Definition: fmgr.c:1638
bool fn_retset
Definition: fmgr.h:62
const Pg_finfo_record * fetch_finfo_record(void *filehandle, const char *funcname)
Definition: fmgr.c:472
void fmgr_info_copy(FmgrInfo *dstinfo, FmgrInfo *srcinfo, MemoryContext destcxt)
Definition: fmgr.c:612
bool fn_strict
Definition: fmgr.h:61
void fmgr_info_cxt(Oid functionId, FmgrInfo *finfo, MemoryContext mcxt)
Definition: fmgr.c:136
MemoryContext AggGetTempMemoryContext(FunctionCallInfo fcinfo)
Definition: nodeAgg.c:4856
bool(* needs_fmgr_hook_type)(Oid fn_oid)
Definition: fmgr.h:764
fmNodePtr resultinfo
Definition: fmgr.h:89
Datum DirectFunctionCall2Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2)
Definition: fmgr.c:815
void * lookup_external_function(void *filehandle, const char *funcname)
Definition: dfmgr.c:171
Datum OidFunctionCall1Coll(Oid functionId, Oid collation, Datum arg1)
Definition: fmgr.c:1414
bool CheckFunctionValidatorAccess(Oid validatorOid, Oid functionOid)
Definition: fmgr.c:2039
static char * buf
Definition: pg_test_fsync.c:68
FmgrHookEventType
Definition: fmgr.h:757
Datum OidFunctionCall6Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6)
Definition: fmgr.c:1467
int funcmaxargs
Definition: fmgr.h:455
Definition: fmgr.h:760
PGDLLIMPORT needs_fmgr_hook_type needs_fmgr_hook
Definition: fmgr.c:38
void * load_external_function(const char *filename, const char *funcname, bool signalNotFound, void **filehandle)
Definition: dfmgr.c:107
Datum FunctionCall3Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3)
Definition: fmgr.c:1174
Datum DirectFunctionCall5Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5)
Definition: fmgr.c:889
Datum OidFunctionCall2Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2)
Definition: fmgr.c:1424
int float8byval
Definition: fmgr.h:458
Datum InputFunctionCall(FmgrInfo *flinfo, char *str, Oid typioparam, int32 typmod)
Definition: fmgr.c:1533
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:126
Datum OidReceiveFunctionCall(Oid functionId, fmStringInfo buf, Oid typioparam, int32 typmod)
Definition: fmgr.c:1666
Oid fn_oid
Definition: fmgr.h:59
void clear_external_function_hash(void *filehandle)
Definition: fmgr.c:596
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:4921
void ** find_rendezvous_variable(const char *varName)
Definition: dfmgr.c:671
Datum DirectFunctionCall6Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6)
Definition: fmgr.c:918
struct varlena * pg_detoast_datum_copy(struct varlena *datum)
Definition: fmgr.c:1735
void fmgr_symbol(Oid functionId, char **mod, char **fn)
Definition: fmgr.c:283
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:1020
Datum OidFunctionCall4Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4)
Definition: fmgr.c:1445
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:1321
size_t Size
Definition: c.h:474
struct FmgrInfo FmgrInfo
struct Node * fmNodePtr
Definition: fmgr.h:22
Datum FunctionCall1Coll(FmgrInfo *flinfo, Oid collation, Datum arg1)
Definition: fmgr.c:1132
void * fn_extra
Definition: fmgr.h:64
bytea * get_fn_opclass_options(FmgrInfo *flinfo)
Definition: fmgr.c:1991
Datum OidInputFunctionCall(Oid functionId, char *str, Oid typioparam, int32 typmod)
Definition: fmgr.c:1648
static char * filename
Definition: pg_dumpall.c:91
void RestoreLibraryState(char *start_address)
Definition: dfmgr.c:749
void SerializeLibraryState(Size maxsize, char *start_address)
Definition: dfmgr.c:727
unsigned char fn_stats
Definition: fmgr.h:63
bytea * OidSendFunctionCall(Oid functionId, Datum val)
Definition: fmgr.c:1676
struct FunctionCallInfoBaseData FunctionCallInfoBaseData
bool get_fn_expr_arg_stable(FmgrInfo *flinfo, int argnum)
Definition: fmgr.c:1869
Datum FunctionCall0Coll(FmgrInfo *flinfo, Oid collation)
Definition: fmgr.c:1115
void * arg
Definition: c.h:563
Datum OidFunctionCall0Coll(Oid functionId, Oid collation)
Definition: fmgr.c:1404
Datum OidFunctionCall5Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5)
Definition: fmgr.c:1456
Datum DirectFunctionCall3Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3)
Definition: fmgr.c:837
Datum DirectFunctionCall1Coll(PGFunction func, Oid collation, Datum arg1)
Definition: fmgr.c:795
Oid fmgr_internal_function(const char *proname)
Definition: fmgr.c:627
struct varlena * pg_detoast_datum(struct varlena *datum)
Definition: fmgr.c:1726
struct varlena * pg_detoast_datum_slice(struct varlena *datum, int32 first, int32 count)
Definition: fmgr.c:1751
Datum OidFunctionCall7Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6, Datum arg7)
Definition: fmgr.c:1480
int api_version
Definition: fmgr.h:394
long val
Definition: informix.c:664
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:1493
int version
Definition: fmgr.h:454
unsigned char bool
Definition: c.h:325
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:1357