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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) 1996-2024, 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 */
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 #define PG_GETARG_TRANSACTIONID(n) DatumGetTransactionId(PG_GETARG_DATUM(n))
280 /* these macros hide the pass-by-reference-ness of the datatype: */
281 #define PG_GETARG_FLOAT4(n) DatumGetFloat4(PG_GETARG_DATUM(n))
282 #define PG_GETARG_FLOAT8(n) DatumGetFloat8(PG_GETARG_DATUM(n))
283 #define PG_GETARG_INT64(n) DatumGetInt64(PG_GETARG_DATUM(n))
284 /* use this if you want the raw, possibly-toasted input datum: */
285 #define PG_GETARG_RAW_VARLENA_P(n) ((struct varlena *) PG_GETARG_POINTER(n))
286 /* use this if you want the input datum de-toasted: */
287 #define PG_GETARG_VARLENA_P(n) PG_DETOAST_DATUM(PG_GETARG_DATUM(n))
288 /* and this if you can handle 1-byte-header datums: */
289 #define PG_GETARG_VARLENA_PP(n) PG_DETOAST_DATUM_PACKED(PG_GETARG_DATUM(n))
290 /* DatumGetFoo macros for varlena types will typically look like this: */
291 #define DatumGetByteaPP(X) ((bytea *) PG_DETOAST_DATUM_PACKED(X))
292 #define DatumGetTextPP(X) ((text *) PG_DETOAST_DATUM_PACKED(X))
293 #define DatumGetBpCharPP(X) ((BpChar *) PG_DETOAST_DATUM_PACKED(X))
294 #define DatumGetVarCharPP(X) ((VarChar *) PG_DETOAST_DATUM_PACKED(X))
295 #define DatumGetHeapTupleHeader(X) ((HeapTupleHeader) PG_DETOAST_DATUM(X))
296 /* And we also offer variants that return an OK-to-write copy */
297 #define DatumGetByteaPCopy(X) ((bytea *) PG_DETOAST_DATUM_COPY(X))
298 #define DatumGetTextPCopy(X) ((text *) PG_DETOAST_DATUM_COPY(X))
299 #define DatumGetBpCharPCopy(X) ((BpChar *) PG_DETOAST_DATUM_COPY(X))
300 #define DatumGetVarCharPCopy(X) ((VarChar *) PG_DETOAST_DATUM_COPY(X))
301 #define DatumGetHeapTupleHeaderCopy(X) ((HeapTupleHeader) PG_DETOAST_DATUM_COPY(X))
302 /* Variants which return n bytes starting at pos. m */
303 #define DatumGetByteaPSlice(X,m,n) ((bytea *) PG_DETOAST_DATUM_SLICE(X,m,n))
304 #define DatumGetTextPSlice(X,m,n) ((text *) PG_DETOAST_DATUM_SLICE(X,m,n))
305 #define DatumGetBpCharPSlice(X,m,n) ((BpChar *) PG_DETOAST_DATUM_SLICE(X,m,n))
306 #define DatumGetVarCharPSlice(X,m,n) ((VarChar *) PG_DETOAST_DATUM_SLICE(X,m,n))
307 /* GETARG macros for varlena types will typically look like this: */
308 #define PG_GETARG_BYTEA_PP(n) DatumGetByteaPP(PG_GETARG_DATUM(n))
309 #define PG_GETARG_TEXT_PP(n) DatumGetTextPP(PG_GETARG_DATUM(n))
310 #define PG_GETARG_BPCHAR_PP(n) DatumGetBpCharPP(PG_GETARG_DATUM(n))
311 #define PG_GETARG_VARCHAR_PP(n) DatumGetVarCharPP(PG_GETARG_DATUM(n))
312 #define PG_GETARG_HEAPTUPLEHEADER(n) DatumGetHeapTupleHeader(PG_GETARG_DATUM(n))
313 /* And we also offer variants that return an OK-to-write copy */
314 #define PG_GETARG_BYTEA_P_COPY(n) DatumGetByteaPCopy(PG_GETARG_DATUM(n))
315 #define PG_GETARG_TEXT_P_COPY(n) DatumGetTextPCopy(PG_GETARG_DATUM(n))
316 #define PG_GETARG_BPCHAR_P_COPY(n) DatumGetBpCharPCopy(PG_GETARG_DATUM(n))
317 #define PG_GETARG_VARCHAR_P_COPY(n) DatumGetVarCharPCopy(PG_GETARG_DATUM(n))
318 #define PG_GETARG_HEAPTUPLEHEADER_COPY(n) DatumGetHeapTupleHeaderCopy(PG_GETARG_DATUM(n))
319 /* And a b-byte slice from position a -also OK to write */
320 #define PG_GETARG_BYTEA_P_SLICE(n,a,b) DatumGetByteaPSlice(PG_GETARG_DATUM(n),a,b)
321 #define PG_GETARG_TEXT_P_SLICE(n,a,b) DatumGetTextPSlice(PG_GETARG_DATUM(n),a,b)
322 #define PG_GETARG_BPCHAR_P_SLICE(n,a,b) DatumGetBpCharPSlice(PG_GETARG_DATUM(n),a,b)
323 #define PG_GETARG_VARCHAR_P_SLICE(n,a,b) DatumGetVarCharPSlice(PG_GETARG_DATUM(n),a,b)
324 /*
325  * Obsolescent variants that guarantee INT alignment for the return value.
326  * Few operations on these particular types need alignment, mainly operations
327  * that cast the VARDATA pointer to a type like int16[]. Most code should use
328  * the ...PP(X) counterpart. Nonetheless, these appear frequently in code
329  * predating the PostgreSQL 8.3 introduction of the ...PP(X) variants.
330  */
331 #define DatumGetByteaP(X) ((bytea *) PG_DETOAST_DATUM(X))
332 #define DatumGetTextP(X) ((text *) PG_DETOAST_DATUM(X))
333 #define DatumGetBpCharP(X) ((BpChar *) PG_DETOAST_DATUM(X))
334 #define DatumGetVarCharP(X) ((VarChar *) PG_DETOAST_DATUM(X))
335 #define PG_GETARG_BYTEA_P(n) DatumGetByteaP(PG_GETARG_DATUM(n))
336 #define PG_GETARG_TEXT_P(n) DatumGetTextP(PG_GETARG_DATUM(n))
337 #define PG_GETARG_BPCHAR_P(n) DatumGetBpCharP(PG_GETARG_DATUM(n))
338 #define PG_GETARG_VARCHAR_P(n) DatumGetVarCharP(PG_GETARG_DATUM(n))
339 
340 /* To access options from opclass support functions use this: */
341 #define PG_HAS_OPCLASS_OPTIONS() has_fn_opclass_options(fcinfo->flinfo)
342 #define PG_GET_OPCLASS_OPTIONS() get_fn_opclass_options(fcinfo->flinfo)
343 
344 /* To return a NULL do this: */
345 #define PG_RETURN_NULL() \
346  do { fcinfo->isnull = true; return (Datum) 0; } while (0)
347 
348 /* A few internal functions return void (which is not the same as NULL!) */
349 #define PG_RETURN_VOID() return (Datum) 0
350 
351 /* Macros for returning results of standard types */
352 
353 #define PG_RETURN_DATUM(x) return (x)
354 #define PG_RETURN_INT32(x) return Int32GetDatum(x)
355 #define PG_RETURN_UINT32(x) return UInt32GetDatum(x)
356 #define PG_RETURN_INT16(x) return Int16GetDatum(x)
357 #define PG_RETURN_UINT16(x) return UInt16GetDatum(x)
358 #define PG_RETURN_CHAR(x) return CharGetDatum(x)
359 #define PG_RETURN_BOOL(x) return BoolGetDatum(x)
360 #define PG_RETURN_OID(x) return ObjectIdGetDatum(x)
361 #define PG_RETURN_POINTER(x) return PointerGetDatum(x)
362 #define PG_RETURN_CSTRING(x) return CStringGetDatum(x)
363 #define PG_RETURN_NAME(x) return NameGetDatum(x)
364 #define PG_RETURN_TRANSACTIONID(x) return TransactionIdGetDatum(x)
365 /* these macros hide the pass-by-reference-ness of the datatype: */
366 #define PG_RETURN_FLOAT4(x) return Float4GetDatum(x)
367 #define PG_RETURN_FLOAT8(x) return Float8GetDatum(x)
368 #define PG_RETURN_INT64(x) return Int64GetDatum(x)
369 #define PG_RETURN_UINT64(x) return UInt64GetDatum(x)
370 /* RETURN macros for other pass-by-ref types will typically look like this: */
371 #define PG_RETURN_BYTEA_P(x) PG_RETURN_POINTER(x)
372 #define PG_RETURN_TEXT_P(x) PG_RETURN_POINTER(x)
373 #define PG_RETURN_BPCHAR_P(x) PG_RETURN_POINTER(x)
374 #define PG_RETURN_VARCHAR_P(x) PG_RETURN_POINTER(x)
375 #define PG_RETURN_HEAPTUPLEHEADER(x) return HeapTupleHeaderGetDatum(x)
376 
377 
378 /*-------------------------------------------------------------------------
379  * Support for detecting call convention of dynamically-loaded functions
380  *
381  * Dynamically loaded functions currently can only use the version-1 ("new
382  * style") calling convention. Version-0 ("old style") is not supported
383  * anymore. Version 1 is the call convention defined in this header file, and
384  * must be accompanied by the macro call
385  *
386  * PG_FUNCTION_INFO_V1(function_name);
387  *
388  * Note that internal functions do not need this decoration since they are
389  * assumed to be version-1.
390  *
391  *-------------------------------------------------------------------------
392  */
393 
394 typedef struct
395 {
396  int api_version; /* specifies call convention version number */
397  /* More fields may be added later, for version numbers > 1. */
399 
400 /* Expected signature of an info function */
401 typedef const Pg_finfo_record *(*PGFInfoFunction) (void);
402 
403 /*
404  * Macro to build an info function associated with the given function name.
405  *
406  * As a convenience, also provide an "extern" declaration for the given
407  * function name, so that writers of C functions need not write that too.
408  *
409  * On Windows, the function and info function must be exported. Our normal
410  * build processes take care of that via .DEF files or --export-all-symbols.
411  * Module authors using a different build process might need to manually
412  * declare the function PGDLLEXPORT. We do that automatically here for the
413  * info function, since authors shouldn't need to be explicitly aware of it.
414  */
415 #define PG_FUNCTION_INFO_V1(funcname) \
416 extern PGDLLEXPORT Datum funcname(PG_FUNCTION_ARGS); \
417 extern PGDLLEXPORT const Pg_finfo_record * CppConcat(pg_finfo_,funcname)(void); \
418 const Pg_finfo_record * \
419 CppConcat(pg_finfo_,funcname) (void) \
420 { \
421  static const Pg_finfo_record my_finfo = { 1 }; \
422  return &my_finfo; \
423 } \
424 extern int no_such_variable
425 
426 
427 /*
428  * Declare _PG_init/_PG_fini centrally. Historically each shared library had
429  * its own declaration; but now that we want to mark these PGDLLEXPORT, using
430  * central declarations avoids each extension having to add that. Any
431  * existing declarations in extensions will continue to work if fmgr.h is
432  * included before them, otherwise compilation for Windows will fail.
433  */
434 extern PGDLLEXPORT void _PG_init(void);
435 extern PGDLLEXPORT void _PG_fini(void);
436 
437 
438 /*-------------------------------------------------------------------------
439  * Support for verifying backend compatibility of loaded modules
440  *
441  * We require dynamically-loaded modules to include the macro call
442  * PG_MODULE_MAGIC;
443  * so that we can check for obvious incompatibility, such as being compiled
444  * for a different major PostgreSQL version.
445  *
446  * To compile with versions of PostgreSQL that do not support this,
447  * you may put an #ifdef/#endif test around it. Note that in a multiple-
448  * source-file module, the macro call should only appear once.
449  *
450  * The specific items included in the magic block are intended to be ones that
451  * are custom-configurable and especially likely to break dynamically loaded
452  * modules if they were compiled with other values. Also, the length field
453  * can be used to detect definition changes.
454  *
455  * Note: we compare magic blocks with memcmp(), so there had better not be
456  * any alignment pad bytes in them.
457  *
458  * Note: when changing the contents of magic blocks, be sure to adjust the
459  * incompatible_module_error() function in dfmgr.c.
460  *-------------------------------------------------------------------------
461  */
462 
463 /* Definition of the magic block structure */
464 typedef struct
465 {
466  int len; /* sizeof(this struct) */
467  int version; /* PostgreSQL major version */
468  int funcmaxargs; /* FUNC_MAX_ARGS */
469  int indexmaxkeys; /* INDEX_MAX_KEYS */
470  int namedatalen; /* NAMEDATALEN */
471  int float8byval; /* FLOAT8PASSBYVAL */
472  char abi_extra[32]; /* see pg_config_manual.h */
474 
475 /* The actual data block contents */
476 #define PG_MODULE_MAGIC_DATA \
477 { \
478  sizeof(Pg_magic_struct), \
479  PG_VERSION_NUM / 100, \
480  FUNC_MAX_ARGS, \
481  INDEX_MAX_KEYS, \
482  NAMEDATALEN, \
483  FLOAT8PASSBYVAL, \
484  FMGR_ABI_EXTRA, \
485 }
486 
487 StaticAssertDecl(sizeof(FMGR_ABI_EXTRA) <= sizeof(((Pg_magic_struct *) 0)->abi_extra),
488  "FMGR_ABI_EXTRA too long");
489 
490 /*
491  * Declare the module magic function. It needs to be a function as the dlsym
492  * in the backend is only guaranteed to work on functions, not data
493  */
494 typedef const Pg_magic_struct *(*PGModuleMagicFunction) (void);
495 
496 #define PG_MAGIC_FUNCTION_NAME Pg_magic_func
497 #define PG_MAGIC_FUNCTION_NAME_STRING "Pg_magic_func"
498 
499 #define PG_MODULE_MAGIC \
500 extern PGDLLEXPORT const Pg_magic_struct *PG_MAGIC_FUNCTION_NAME(void); \
501 const Pg_magic_struct * \
502 PG_MAGIC_FUNCTION_NAME(void) \
503 { \
504  static const Pg_magic_struct Pg_magic_data = PG_MODULE_MAGIC_DATA; \
505  return &Pg_magic_data; \
506 } \
507 extern int no_such_variable
508 
509 
510 /*-------------------------------------------------------------------------
511  * Support routines and macros for callers of fmgr-compatible functions
512  *-------------------------------------------------------------------------
513  */
514 
515 /* These are for invocation of a specifically named function with a
516  * directly-computed parameter list. Note that neither arguments nor result
517  * are allowed to be NULL. Also, the function cannot be one that needs to
518  * look at FmgrInfo, since there won't be any.
519  */
520 extern Datum DirectFunctionCall1Coll(PGFunction func, Oid collation,
521  Datum arg1);
522 extern Datum DirectFunctionCall2Coll(PGFunction func, Oid collation,
523  Datum arg1, Datum arg2);
524 extern Datum DirectFunctionCall3Coll(PGFunction func, Oid collation,
525  Datum arg1, Datum arg2,
526  Datum arg3);
527 extern Datum DirectFunctionCall4Coll(PGFunction func, Oid collation,
528  Datum arg1, Datum arg2,
529  Datum arg3, Datum arg4);
530 extern Datum DirectFunctionCall5Coll(PGFunction func, Oid collation,
531  Datum arg1, Datum arg2,
532  Datum arg3, Datum arg4, Datum arg5);
533 extern Datum DirectFunctionCall6Coll(PGFunction func, Oid collation,
534  Datum arg1, Datum arg2,
535  Datum arg3, Datum arg4, Datum arg5,
536  Datum arg6);
537 extern Datum DirectFunctionCall7Coll(PGFunction func, Oid collation,
538  Datum arg1, Datum arg2,
539  Datum arg3, Datum arg4, Datum arg5,
540  Datum arg6, Datum arg7);
541 extern Datum DirectFunctionCall8Coll(PGFunction func, Oid collation,
542  Datum arg1, Datum arg2,
543  Datum arg3, Datum arg4, Datum arg5,
544  Datum arg6, Datum arg7, Datum arg8);
545 extern Datum DirectFunctionCall9Coll(PGFunction func, Oid collation,
546  Datum arg1, Datum arg2,
547  Datum arg3, Datum arg4, Datum arg5,
548  Datum arg6, Datum arg7, Datum arg8,
549  Datum arg9);
550 
551 /*
552  * These functions work like the DirectFunctionCall functions except that
553  * they use the flinfo parameter to initialise the fcinfo for the call.
554  * It's recommended that the callee only use the fn_extra and fn_mcxt
555  * fields, as other fields will typically describe the calling function
556  * not the callee. Conversely, the calling function should not have
557  * used fn_extra, unless its use is known to be compatible with the callee's.
558  */
560  Oid collation, Datum arg1);
562  Oid collation, Datum arg1, Datum arg2);
563 
564 /* These are for invocation of a previously-looked-up function with a
565  * directly-computed parameter list. Note that neither arguments nor result
566  * are allowed to be NULL.
567  */
568 extern Datum FunctionCall0Coll(FmgrInfo *flinfo, Oid collation);
569 extern Datum FunctionCall1Coll(FmgrInfo *flinfo, Oid collation,
570  Datum arg1);
571 extern Datum FunctionCall2Coll(FmgrInfo *flinfo, Oid collation,
572  Datum arg1, Datum arg2);
573 extern Datum FunctionCall3Coll(FmgrInfo *flinfo, Oid collation,
574  Datum arg1, Datum arg2,
575  Datum arg3);
576 extern Datum FunctionCall4Coll(FmgrInfo *flinfo, Oid collation,
577  Datum arg1, Datum arg2,
578  Datum arg3, Datum arg4);
579 extern Datum FunctionCall5Coll(FmgrInfo *flinfo, Oid collation,
580  Datum arg1, Datum arg2,
581  Datum arg3, Datum arg4, Datum arg5);
582 extern Datum FunctionCall6Coll(FmgrInfo *flinfo, Oid collation,
583  Datum arg1, Datum arg2,
584  Datum arg3, Datum arg4, Datum arg5,
585  Datum arg6);
586 extern Datum FunctionCall7Coll(FmgrInfo *flinfo, Oid collation,
587  Datum arg1, Datum arg2,
588  Datum arg3, Datum arg4, Datum arg5,
589  Datum arg6, Datum arg7);
590 extern Datum FunctionCall8Coll(FmgrInfo *flinfo, Oid collation,
591  Datum arg1, Datum arg2,
592  Datum arg3, Datum arg4, Datum arg5,
593  Datum arg6, Datum arg7, Datum arg8);
594 extern Datum FunctionCall9Coll(FmgrInfo *flinfo, Oid collation,
595  Datum arg1, Datum arg2,
596  Datum arg3, Datum arg4, Datum arg5,
597  Datum arg6, Datum arg7, Datum arg8,
598  Datum arg9);
599 
600 /* These are for invocation of a function identified by OID with a
601  * directly-computed parameter list. Note that neither arguments nor result
602  * are allowed to be NULL. These are essentially fmgr_info() followed by
603  * FunctionCallN(). If the same function is to be invoked repeatedly, do the
604  * fmgr_info() once and then use FunctionCallN().
605  */
606 extern Datum OidFunctionCall0Coll(Oid functionId, Oid collation);
607 extern Datum OidFunctionCall1Coll(Oid functionId, Oid collation,
608  Datum arg1);
609 extern Datum OidFunctionCall2Coll(Oid functionId, Oid collation,
610  Datum arg1, Datum arg2);
611 extern Datum OidFunctionCall3Coll(Oid functionId, Oid collation,
612  Datum arg1, Datum arg2,
613  Datum arg3);
614 extern Datum OidFunctionCall4Coll(Oid functionId, Oid collation,
615  Datum arg1, Datum arg2,
616  Datum arg3, Datum arg4);
617 extern Datum OidFunctionCall5Coll(Oid functionId, Oid collation,
618  Datum arg1, Datum arg2,
619  Datum arg3, Datum arg4, Datum arg5);
620 extern Datum OidFunctionCall6Coll(Oid functionId, Oid collation,
621  Datum arg1, Datum arg2,
622  Datum arg3, Datum arg4, Datum arg5,
623  Datum arg6);
624 extern Datum OidFunctionCall7Coll(Oid functionId, Oid collation,
625  Datum arg1, Datum arg2,
626  Datum arg3, Datum arg4, Datum arg5,
627  Datum arg6, Datum arg7);
628 extern Datum OidFunctionCall8Coll(Oid functionId, Oid collation,
629  Datum arg1, Datum arg2,
630  Datum arg3, Datum arg4, Datum arg5,
631  Datum arg6, Datum arg7, Datum arg8);
632 extern Datum OidFunctionCall9Coll(Oid functionId, Oid collation,
633  Datum arg1, Datum arg2,
634  Datum arg3, Datum arg4, Datum arg5,
635  Datum arg6, Datum arg7, Datum arg8,
636  Datum arg9);
637 
638 /* These macros allow the collation argument to be omitted (with a default of
639  * InvalidOid, ie, no collation). They exist mostly for backwards
640  * compatibility of source code.
641  */
642 #define DirectFunctionCall1(func, arg1) \
643  DirectFunctionCall1Coll(func, InvalidOid, arg1)
644 #define DirectFunctionCall2(func, arg1, arg2) \
645  DirectFunctionCall2Coll(func, InvalidOid, arg1, arg2)
646 #define DirectFunctionCall3(func, arg1, arg2, arg3) \
647  DirectFunctionCall3Coll(func, InvalidOid, arg1, arg2, arg3)
648 #define DirectFunctionCall4(func, arg1, arg2, arg3, arg4) \
649  DirectFunctionCall4Coll(func, InvalidOid, arg1, arg2, arg3, arg4)
650 #define DirectFunctionCall5(func, arg1, arg2, arg3, arg4, arg5) \
651  DirectFunctionCall5Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5)
652 #define DirectFunctionCall6(func, arg1, arg2, arg3, arg4, arg5, arg6) \
653  DirectFunctionCall6Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6)
654 #define DirectFunctionCall7(func, arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
655  DirectFunctionCall7Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
656 #define DirectFunctionCall8(func, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8) \
657  DirectFunctionCall8Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)
658 #define DirectFunctionCall9(func, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9) \
659  DirectFunctionCall9Coll(func, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9)
660 #define FunctionCall1(flinfo, arg1) \
661  FunctionCall1Coll(flinfo, InvalidOid, arg1)
662 #define FunctionCall2(flinfo, arg1, arg2) \
663  FunctionCall2Coll(flinfo, InvalidOid, arg1, arg2)
664 #define FunctionCall3(flinfo, arg1, arg2, arg3) \
665  FunctionCall3Coll(flinfo, InvalidOid, arg1, arg2, arg3)
666 #define FunctionCall4(flinfo, arg1, arg2, arg3, arg4) \
667  FunctionCall4Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4)
668 #define FunctionCall5(flinfo, arg1, arg2, arg3, arg4, arg5) \
669  FunctionCall5Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5)
670 #define FunctionCall6(flinfo, arg1, arg2, arg3, arg4, arg5, arg6) \
671  FunctionCall6Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6)
672 #define FunctionCall7(flinfo, arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
673  FunctionCall7Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
674 #define FunctionCall8(flinfo, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8) \
675  FunctionCall8Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)
676 #define FunctionCall9(flinfo, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9) \
677  FunctionCall9Coll(flinfo, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9)
678 #define OidFunctionCall0(functionId) \
679  OidFunctionCall0Coll(functionId, InvalidOid)
680 #define OidFunctionCall1(functionId, arg1) \
681  OidFunctionCall1Coll(functionId, InvalidOid, arg1)
682 #define OidFunctionCall2(functionId, arg1, arg2) \
683  OidFunctionCall2Coll(functionId, InvalidOid, arg1, arg2)
684 #define OidFunctionCall3(functionId, arg1, arg2, arg3) \
685  OidFunctionCall3Coll(functionId, InvalidOid, arg1, arg2, arg3)
686 #define OidFunctionCall4(functionId, arg1, arg2, arg3, arg4) \
687  OidFunctionCall4Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4)
688 #define OidFunctionCall5(functionId, arg1, arg2, arg3, arg4, arg5) \
689  OidFunctionCall5Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5)
690 #define OidFunctionCall6(functionId, arg1, arg2, arg3, arg4, arg5, arg6) \
691  OidFunctionCall6Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6)
692 #define OidFunctionCall7(functionId, arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
693  OidFunctionCall7Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
694 #define OidFunctionCall8(functionId, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8) \
695  OidFunctionCall8Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)
696 #define OidFunctionCall9(functionId, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9) \
697  OidFunctionCall9Coll(functionId, InvalidOid, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9)
698 
699 
700 /* Special cases for convenient invocation of datatype I/O functions. */
701 extern Datum InputFunctionCall(FmgrInfo *flinfo, char *str,
702  Oid typioparam, int32 typmod);
703 extern bool InputFunctionCallSafe(FmgrInfo *flinfo, char *str,
704  Oid typioparam, int32 typmod,
705  fmNodePtr escontext,
706  Datum *result);
707 extern bool DirectInputFunctionCallSafe(PGFunction func, char *str,
708  Oid typioparam, int32 typmod,
709  fmNodePtr escontext,
710  Datum *result);
711 extern Datum OidInputFunctionCall(Oid functionId, char *str,
712  Oid typioparam, int32 typmod);
713 extern char *OutputFunctionCall(FmgrInfo *flinfo, Datum val);
714 extern char *OidOutputFunctionCall(Oid functionId, Datum val);
716  Oid typioparam, int32 typmod);
717 extern Datum OidReceiveFunctionCall(Oid functionId, fmStringInfo buf,
718  Oid typioparam, int32 typmod);
719 extern bytea *SendFunctionCall(FmgrInfo *flinfo, Datum val);
720 extern bytea *OidSendFunctionCall(Oid functionId, Datum val);
721 
722 
723 /*
724  * Routines in fmgr.c
725  */
726 extern const Pg_finfo_record *fetch_finfo_record(void *filehandle, const char *funcname);
727 extern Oid fmgr_internal_function(const char *proname);
728 extern Oid get_fn_expr_rettype(FmgrInfo *flinfo);
729 extern Oid get_fn_expr_argtype(FmgrInfo *flinfo, int argnum);
730 extern Oid get_call_expr_argtype(fmNodePtr expr, int argnum);
731 extern bool get_fn_expr_arg_stable(FmgrInfo *flinfo, int argnum);
732 extern bool get_call_expr_arg_stable(fmNodePtr expr, int argnum);
733 extern bool get_fn_expr_variadic(FmgrInfo *flinfo);
734 extern bytea *get_fn_opclass_options(FmgrInfo *flinfo);
735 extern bool has_fn_opclass_options(FmgrInfo *flinfo);
736 extern void set_fn_opclass_options(FmgrInfo *flinfo, bytea *options);
737 extern bool CheckFunctionValidatorAccess(Oid validatorOid, Oid functionOid);
738 
739 /*
740  * Routines in dfmgr.c
741  */
742 extern PGDLLIMPORT char *Dynamic_library_path;
743 
744 extern void *load_external_function(const char *filename, const char *funcname,
745  bool signalNotFound, void **filehandle);
746 extern void *lookup_external_function(void *filehandle, const char *funcname);
747 extern void load_file(const char *filename, bool restricted);
748 extern void **find_rendezvous_variable(const char *varName);
749 extern Size EstimateLibraryStateSpace(void);
750 extern void SerializeLibraryState(Size maxsize, char *start_address);
751 extern void RestoreLibraryState(char *start_address);
752 
753 /*
754  * Support for aggregate functions
755  *
756  * These are actually in executor/nodeAgg.c, but we declare them here since
757  * the whole point is for callers to not be overly friendly with nodeAgg.
758  */
759 
760 /* AggCheckCallContext can return one of the following codes, or 0: */
761 #define AGG_CONTEXT_AGGREGATE 1 /* regular aggregate */
762 #define AGG_CONTEXT_WINDOW 2 /* window function */
763 
764 extern int AggCheckCallContext(FunctionCallInfo fcinfo,
765  MemoryContext *aggcontext);
768 extern bool AggStateIsShared(FunctionCallInfo fcinfo);
769 extern void AggRegisterCallback(FunctionCallInfo fcinfo,
771  Datum arg);
772 
773 /*
774  * We allow plugin modules to hook function entry/exit. This is intended
775  * as support for loadable security policy modules, which may want to
776  * perform additional privilege checks on function entry or exit, or to do
777  * other internal bookkeeping. To make this possible, such modules must be
778  * able not only to support normal function entry and exit, but also to trap
779  * the case where we bail out due to an error; and they must also be able to
780  * prevent inlining.
781  */
782 typedef enum FmgrHookEventType
783 {
788 
789 typedef bool (*needs_fmgr_hook_type) (Oid fn_oid);
790 
791 typedef void (*fmgr_hook_type) (FmgrHookEventType event,
792  FmgrInfo *flinfo, Datum *arg);
793 
796 
797 #define FmgrHookIsNeeded(fn_oid) \
798  (!needs_fmgr_hook ? false : (*needs_fmgr_hook)(fn_oid))
799 
800 #endif /* FMGR_H */
#define PGDLLIMPORT
Definition: c.h:1303
signed int int32
Definition: c.h:481
#define PGDLLEXPORT
Definition: c.h:1318
#define FLEXIBLE_ARRAY_MEMBER
Definition: c.h:385
unsigned char bool
Definition: c.h:443
size_t Size
Definition: c.h:592
Datum FunctionCall4Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4)
Definition: fmgr.c:1196
Datum ReceiveFunctionCall(FmgrInfo *flinfo, fmStringInfo buf, Oid typioparam, int32 typmod)
Definition: fmgr.c:1697
Datum OidFunctionCall2Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2)
Definition: fmgr.c:1421
bool get_call_expr_arg_stable(fmNodePtr expr, int argnum)
Oid get_call_expr_argtype(fmNodePtr expr, int argnum)
void set_fn_opclass_options(FmgrInfo *flinfo, bytea *options)
Definition: fmgr.c:2070
Oid fmgr_internal_function(const char *proname)
Definition: fmgr.c:595
struct varlena * pg_detoast_datum_packed(struct varlena *datum)
Definition: fmgr.c:1864
fmAggrefPtr AggGetAggref(FunctionCallInfo fcinfo)
Definition: nodeAgg.c:4555
struct Aggref * fmAggrefPtr
Definition: fmgr.h:23
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:1503
bool get_fn_expr_arg_stable(FmgrInfo *flinfo, int argnum)
Definition: fmgr.c:1975
void AggRegisterCallback(FunctionCallInfo fcinfo, fmExprContextCallbackFunction func, Datum arg)
Definition: nodeAgg.c:4654
Datum OidFunctionCall6Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6)
Definition: fmgr.c:1464
Datum FunctionCall6Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6)
Definition: fmgr.c:1252
Datum OidFunctionCall5Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5)
Definition: fmgr.c:1453
void(* fmExprContextCallbackFunction)(Datum arg)
Definition: fmgr.h:26
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:1318
struct varlena * pg_detoast_datum_copy(struct varlena *datum)
Definition: fmgr.c:1841
bool CheckFunctionValidatorAccess(Oid validatorOid, Oid functionOid)
Definition: fmgr.c:2145
void RestoreLibraryState(char *start_address)
Definition: dfmgr.c:676
bytea * get_fn_opclass_options(FmgrInfo *flinfo)
Definition: fmgr.c:2097
bool(* needs_fmgr_hook_type)(Oid fn_oid)
Definition: fmgr.h:789
Datum InputFunctionCall(FmgrInfo *flinfo, char *str, Oid typioparam, int32 typmod)
Definition: fmgr.c:1530
void * load_external_function(const char *filename, const char *funcname, bool signalNotFound, void **filehandle)
Definition: dfmgr.c:105
Datum FunctionCall2Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2)
Definition: fmgr.c:1149
void fmgr_info(Oid functionId, FmgrInfo *finfo)
Definition: fmgr.c:127
struct FmgrInfo FmgrInfo
Datum OidInputFunctionCall(Oid functionId, char *str, Oid typioparam, int32 typmod)
Definition: fmgr.c:1754
const Pg_finfo_record * fetch_finfo_record(void *filehandle, const char *funcname)
Definition: fmgr.c:455
PGDLLIMPORT needs_fmgr_hook_type needs_fmgr_hook
Definition: fmgr.c:39
Datum DirectFunctionCall2Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2)
Definition: fmgr.c:812
Datum FunctionCall5Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5)
Definition: fmgr.c:1223
FmgrHookEventType
Definition: fmgr.h:783
@ FHET_END
Definition: fmgr.h:785
@ FHET_ABORT
Definition: fmgr.h:786
@ FHET_START
Definition: fmgr.h:784
Datum OidFunctionCall3Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3)
Definition: fmgr.c:1431
struct FunctionCallInfoBaseData * FunctionCallInfo
Definition: fmgr.h:38
void fmgr_info_cxt(Oid functionId, FmgrInfo *finfo, MemoryContext mcxt)
Definition: fmgr.c:137
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:1490
Datum OidFunctionCall4Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4)
Definition: fmgr.c:1442
PGDLLEXPORT void _PG_fini(void)
void SerializeLibraryState(Size maxsize, char *start_address)
Definition: dfmgr.c:654
Datum DirectFunctionCall4Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4)
Definition: fmgr.c:859
void load_file(const char *filename, bool restricted)
Definition: dfmgr.c:144
Datum OidFunctionCall7Coll(Oid functionId, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6, Datum arg7)
Definition: fmgr.c:1477
PGDLLIMPORT fmgr_hook_type fmgr_hook
Definition: fmgr.c:40
bool InputFunctionCallSafe(FmgrInfo *flinfo, char *str, Oid typioparam, int32 typmod, fmNodePtr escontext, Datum *result)
Definition: fmgr.c:1585
PGDLLEXPORT void _PG_init(void)
Definition: auth_delay.c:54
Size EstimateLibraryStateSpace(void)
Definition: dfmgr.c:637
bool has_fn_opclass_options(FmgrInfo *flinfo)
Definition: fmgr.c:2081
int AggCheckCallContext(FunctionCallInfo fcinfo, MemoryContext *aggcontext)
Definition: nodeAgg.c:4511
Datum CallerFInfoFunctionCall2(PGFunction func, FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2)
Definition: fmgr.c:1085
Datum CallerFInfoFunctionCall1(PGFunction func, FmgrInfo *flinfo, Oid collation, Datum arg1)
Definition: fmgr.c:1065
Datum DirectFunctionCall6Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6)
Definition: fmgr.c:915
char * OidOutputFunctionCall(Oid functionId, Datum val)
Definition: fmgr.c:1763
Datum DirectFunctionCall5Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5)
Definition: fmgr.c:886
PGDLLIMPORT char * Dynamic_library_path
Definition: dfmgr.c:77
Datum OidFunctionCall1Coll(Oid functionId, Oid collation, Datum arg1)
Definition: fmgr.c:1411
bool AggStateIsShared(FunctionCallInfo fcinfo)
Definition: nodeAgg.c:4615
void ** find_rendezvous_variable(const char *varName)
Definition: dfmgr.c:599
struct Node * fmNodePtr
Definition: fmgr.h:22
struct varlena * pg_detoast_datum_slice(struct varlena *datum, int32 first, int32 count)
Definition: fmgr.c:1857
bool get_fn_expr_variadic(FmgrInfo *flinfo)
Definition: fmgr.c:2044
Datum DirectFunctionCall1Coll(PGFunction func, Oid collation, Datum arg1)
Definition: fmgr.c:792
Datum OidReceiveFunctionCall(Oid functionId, fmStringInfo buf, Oid typioparam, int32 typmod)
Definition: fmgr.c:1772
Datum FunctionCall3Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3)
Definition: fmgr.c:1171
void(* fmgr_hook_type)(FmgrHookEventType event, FmgrInfo *flinfo, Datum *arg)
Definition: fmgr.h:791
Datum DirectFunctionCall3Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3)
Definition: fmgr.c:834
Datum(* PGFunction)(FunctionCallInfo fcinfo)
Definition: fmgr.h:40
Datum FunctionCall7Coll(FmgrInfo *flinfo, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6, Datum arg7)
Definition: fmgr.c:1284
Oid get_fn_expr_argtype(FmgrInfo *flinfo, int argnum)
Definition: fmgr.c:1910
Datum OidFunctionCall0Coll(Oid functionId, Oid collation)
Definition: fmgr.c:1401
void fmgr_symbol(Oid functionId, char **mod, char **fn)
Definition: fmgr.c:281
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:1017
bytea * SendFunctionCall(FmgrInfo *flinfo, Datum val)
Definition: fmgr.c:1744
Datum FunctionCall1Coll(FmgrInfo *flinfo, Oid collation, Datum arg1)
Definition: fmgr.c:1129
bool DirectInputFunctionCallSafe(PGFunction func, char *str, Oid typioparam, int32 typmod, fmNodePtr escontext, Datum *result)
Definition: fmgr.c:1640
bytea * OidSendFunctionCall(Oid functionId, Datum val)
Definition: fmgr.c:1782
Oid get_fn_expr_rettype(FmgrInfo *flinfo)
Definition: fmgr.c:1888
struct FunctionCallInfoBaseData FunctionCallInfoBaseData
char * OutputFunctionCall(FmgrInfo *flinfo, Datum val)
Definition: fmgr.c:1683
void fmgr_info_copy(FmgrInfo *dstinfo, FmgrInfo *srcinfo, MemoryContext destcxt)
Definition: fmgr.c:580
Datum FunctionCall0Coll(FmgrInfo *flinfo, Oid collation)
Definition: fmgr.c:1112
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:1354
struct varlena * pg_detoast_datum(struct varlena *datum)
Definition: fmgr.c:1832
Datum DirectFunctionCall7Coll(PGFunction func, Oid collation, Datum arg1, Datum arg2, Datum arg3, Datum arg4, Datum arg5, Datum arg6, Datum arg7)
Definition: fmgr.c:947
void * lookup_external_function(void *filehandle, const char *funcname)
Definition: dfmgr.c:166
StaticAssertDecl(sizeof(FMGR_ABI_EXTRA)<=sizeof(((Pg_magic_struct *) 0) ->abi_extra), "FMGR_ABI_EXTRA too long")
MemoryContext AggGetTempMemoryContext(FunctionCallInfo fcinfo)
Definition: nodeAgg.c:4589
struct StringInfoData * fmStringInfo
Definition: fmgr.h:29
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:981
#define funcname
Definition: indent_codes.h:69
long val
Definition: informix.c:670
void * arg
#define FMGR_ABI_EXTRA
static char * filename
Definition: pg_dumpall.c:121
NameData proname
Definition: pg_proc.h:35
static char * buf
Definition: pg_test_fsync.c:73
uintptr_t Datum
Definition: postgres.h:64
unsigned int Oid
Definition: postgres_ext.h:31
Definition: fmgr.h:57
void * fn_extra
Definition: fmgr.h:64
short fn_nargs
Definition: fmgr.h:60
fmNodePtr fn_expr
Definition: fmgr.h:66
PGFunction fn_addr
Definition: fmgr.h:58
unsigned char fn_stats
Definition: fmgr.h:63
MemoryContext fn_mcxt
Definition: fmgr.h:65
Oid fn_oid
Definition: fmgr.h:59
bool fn_retset
Definition: fmgr.h:62
bool fn_strict
Definition: fmgr.h:61
fmNodePtr resultinfo
Definition: fmgr.h:89
FmgrInfo * flinfo
Definition: fmgr.h:87
fmNodePtr context
Definition: fmgr.h:88
NullableDatum args[FLEXIBLE_ARRAY_MEMBER]
Definition: fmgr.h:95
Definition: nodes.h:129
int api_version
Definition: fmgr.h:396
int float8byval
Definition: fmgr.h:471
int funcmaxargs
Definition: fmgr.h:468
int indexmaxkeys
Definition: fmgr.h:469
int namedatalen
Definition: fmgr.h:470
int version
Definition: fmgr.h:467
Definition: c.h:674
static void * fn(void *arg)
Definition: thread-alloc.c:119