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plpy_exec.c File Reference
#include "postgres.h"
#include "access/htup_details.h"
#include "access/xact.h"
#include "catalog/pg_type.h"
#include "commands/trigger.h"
#include "executor/spi.h"
#include "funcapi.h"
#include "plpy_elog.h"
#include "plpy_exec.h"
#include "plpy_main.h"
#include "plpy_procedure.h"
#include "plpy_subxactobject.h"
#include "plpython.h"
#include "utils/fmgrprotos.h"
#include "utils/rel.h"
Include dependency graph for plpy_exec.c:

Go to the source code of this file.

Data Structures

struct  PLySRFState
 

Typedefs

typedef struct PLySRFState PLySRFState
 

Functions

static PyObject * PLy_function_build_args (FunctionCallInfo fcinfo, PLyProcedure *proc)
 
static PLySavedArgsPLy_function_save_args (PLyProcedure *proc)
 
static void PLy_function_restore_args (PLyProcedure *proc, PLySavedArgs *savedargs)
 
static void PLy_function_drop_args (PLySavedArgs *savedargs)
 
static void PLy_global_args_push (PLyProcedure *proc)
 
static void PLy_global_args_pop (PLyProcedure *proc)
 
static void plpython_srf_cleanup_callback (void *arg)
 
static void plpython_return_error_callback (void *arg)
 
static PyObject * PLy_trigger_build_args (FunctionCallInfo fcinfo, PLyProcedure *proc, HeapTuple *rv)
 
static HeapTuple PLy_modify_tuple (PLyProcedure *proc, PyObject *pltd, TriggerData *tdata, HeapTuple otup)
 
static void plpython_trigger_error_callback (void *arg)
 
static PyObject * PLy_procedure_call (PLyProcedure *proc, const char *kargs, PyObject *vargs)
 
static void PLy_abort_open_subtransactions (int save_subxact_level)
 
Datum PLy_exec_function (FunctionCallInfo fcinfo, PLyProcedure *proc)
 
HeapTuple PLy_exec_trigger (FunctionCallInfo fcinfo, PLyProcedure *proc)
 

Typedef Documentation

◆ PLySRFState

typedef struct PLySRFState PLySRFState

Function Documentation

◆ plpython_return_error_callback()

static void plpython_return_error_callback ( void *  arg)
static

Definition at line 693 of file plpy_exec.c.

694{
696
697 if (exec_ctx->curr_proc &&
698 !exec_ctx->curr_proc->is_procedure)
699 errcontext("while creating return value");
700}
#define errcontext
Definition: elog.h:196
PLyExecutionContext * PLy_current_execution_context(void)
Definition: plpy_main.c:365
PLyProcedure * curr_proc
Definition: plpy_main.h:20

References PLyExecutionContext::curr_proc, errcontext, PLyProcedure::is_procedure, and PLy_current_execution_context().

Referenced by PLy_exec_function().

◆ plpython_srf_cleanup_callback()

static void plpython_srf_cleanup_callback ( void *  arg)
static

Definition at line 679 of file plpy_exec.c.

680{
681 PLySRFState *srfstate = (PLySRFState *) arg;
682
683 /* Release refcount on the iter, if we still have one */
684 Py_XDECREF(srfstate->iter);
685 srfstate->iter = NULL;
686 /* And drop any saved args; we won't need them */
687 if (srfstate->savedargs)
689 srfstate->savedargs = NULL;
690}
void * arg
static void PLy_function_drop_args(PLySavedArgs *savedargs)
Definition: plpy_exec.c:582
PLySavedArgs * savedargs
Definition: plpy_exec.c:28
PyObject * iter
Definition: plpy_exec.c:27

References arg, PLySRFState::iter, PLy_function_drop_args(), and PLySRFState::savedargs.

Referenced by PLy_exec_function().

◆ plpython_trigger_error_callback()

static void plpython_trigger_error_callback ( void *  arg)
static

Definition at line 1050 of file plpy_exec.c.

1051{
1053
1054 if (exec_ctx->curr_proc)
1055 errcontext("while modifying trigger row");
1056}

References PLyExecutionContext::curr_proc, errcontext, and PLy_current_execution_context().

Referenced by PLy_modify_tuple().

◆ PLy_abort_open_subtransactions()

static void PLy_abort_open_subtransactions ( int  save_subxact_level)
static

Definition at line 1102 of file plpy_exec.c.

1103{
1104 Assert(save_subxact_level >= 0);
1105
1106 while (list_length(explicit_subtransactions) > save_subxact_level)
1107 {
1108 PLySubtransactionData *subtransactiondata;
1109
1111
1113 (errmsg("forcibly aborting a subtransaction that has not been exited")));
1114
1116
1119
1120 MemoryContextSwitchTo(subtransactiondata->oldcontext);
1121 CurrentResourceOwner = subtransactiondata->oldowner;
1122 pfree(subtransactiondata);
1123 }
1124}
#define Assert(condition)
Definition: c.h:815
int errmsg(const char *fmt,...)
Definition: elog.c:1070
#define WARNING
Definition: elog.h:36
#define ereport(elevel,...)
Definition: elog.h:149
List * list_delete_first(List *list)
Definition: list.c:943
void pfree(void *pointer)
Definition: mcxt.c:1521
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:124
static int list_length(const List *l)
Definition: pg_list.h:152
#define NIL
Definition: pg_list.h:68
#define linitial(l)
Definition: pg_list.h:178
List * explicit_subtransactions
ResourceOwner CurrentResourceOwner
Definition: resowner.c:165
void RollbackAndReleaseCurrentSubTransaction(void)
Definition: xact.c:4788

References Assert, CurrentResourceOwner, ereport, errmsg(), explicit_subtransactions, linitial, list_delete_first(), list_length(), MemoryContextSwitchTo(), NIL, PLySubtransactionData::oldcontext, PLySubtransactionData::oldowner, pfree(), RollbackAndReleaseCurrentSubTransaction(), and WARNING.

Referenced by PLy_procedure_call().

◆ PLy_exec_function()

Datum PLy_exec_function ( FunctionCallInfo  fcinfo,
PLyProcedure proc 
)

Definition at line 53 of file plpy_exec.c.

54{
55 bool is_setof = proc->is_setof;
56 Datum rv;
57 PyObject *volatile plargs = NULL;
58 PyObject *volatile plrv = NULL;
59 FuncCallContext *volatile funcctx = NULL;
60 PLySRFState *volatile srfstate = NULL;
61 ErrorContextCallback plerrcontext;
62
63 /*
64 * If the function is called recursively, we must push outer-level
65 * arguments into the stack. This must be immediately before the PG_TRY
66 * to ensure that the corresponding pop happens.
67 */
69
70 PG_TRY();
71 {
72 if (is_setof)
73 {
74 /* First Call setup */
75 if (SRF_IS_FIRSTCALL())
76 {
77 funcctx = SRF_FIRSTCALL_INIT();
78 srfstate = (PLySRFState *)
80 sizeof(PLySRFState));
81 /* Immediately register cleanup callback */
83 srfstate->callback.arg = srfstate;
85 &srfstate->callback);
86 funcctx->user_fctx = srfstate;
87 }
88 /* Every call setup */
89 funcctx = SRF_PERCALL_SETUP();
90 Assert(funcctx != NULL);
91 srfstate = (PLySRFState *) funcctx->user_fctx;
92 Assert(srfstate != NULL);
93 }
94
95 if (srfstate == NULL || srfstate->iter == NULL)
96 {
97 /*
98 * Non-SETOF function or first time for SETOF function: build
99 * args, then actually execute the function.
100 */
101 plargs = PLy_function_build_args(fcinfo, proc);
102 plrv = PLy_procedure_call(proc, "args", plargs);
103 Assert(plrv != NULL);
104 }
105 else
106 {
107 /*
108 * Second or later call for a SETOF function: restore arguments in
109 * globals dict to what they were when we left off. We must do
110 * this in case multiple evaluations of the same SETOF function
111 * are interleaved. It's a bit annoying, since the iterator may
112 * not look at the arguments at all, but we have no way to know
113 * that. Fortunately this isn't terribly expensive.
114 */
115 if (srfstate->savedargs)
116 PLy_function_restore_args(proc, srfstate->savedargs);
117 srfstate->savedargs = NULL; /* deleted by restore_args */
118 }
119
120 /*
121 * If it returns a set, call the iterator to get the next return item.
122 * We stay in the SPI context while doing this, because PyIter_Next()
123 * calls back into Python code which might contain SPI calls.
124 */
125 if (is_setof)
126 {
127 if (srfstate->iter == NULL)
128 {
129 /* first time -- do checks and setup */
130 ReturnSetInfo *rsi = (ReturnSetInfo *) fcinfo->resultinfo;
131
132 if (!rsi || !IsA(rsi, ReturnSetInfo) ||
133 (rsi->allowedModes & SFRM_ValuePerCall) == 0)
134 {
136 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
137 errmsg("unsupported set function return mode"),
138 errdetail("PL/Python set-returning functions only support returning one value per call.")));
139 }
141
142 /* Make iterator out of returned object */
143 srfstate->iter = PyObject_GetIter(plrv);
144
145 Py_DECREF(plrv);
146 plrv = NULL;
147
148 if (srfstate->iter == NULL)
150 (errcode(ERRCODE_DATATYPE_MISMATCH),
151 errmsg("returned object cannot be iterated"),
152 errdetail("PL/Python set-returning functions must return an iterable object.")));
153 }
154
155 /* Fetch next from iterator */
156 plrv = PyIter_Next(srfstate->iter);
157 if (plrv == NULL)
158 {
159 /* Iterator is exhausted or error happened */
160 bool has_error = (PyErr_Occurred() != NULL);
161
162 Py_DECREF(srfstate->iter);
163 srfstate->iter = NULL;
164
165 if (has_error)
166 PLy_elog(ERROR, "error fetching next item from iterator");
167
168 /* Pass a null through the data-returning steps below */
169 Py_INCREF(Py_None);
170 plrv = Py_None;
171 }
172 else
173 {
174 /*
175 * This won't be last call, so save argument values. We do
176 * this again each time in case the iterator is changing those
177 * values.
178 */
179 srfstate->savedargs = PLy_function_save_args(proc);
180 }
181 }
182
183 /*
184 * Disconnect from SPI manager and then create the return values datum
185 * (if the input function does a palloc for it this must not be
186 * allocated in the SPI memory context because SPI_finish would free
187 * it).
188 */
189 if (SPI_finish() != SPI_OK_FINISH)
190 elog(ERROR, "SPI_finish failed");
191
193 plerrcontext.previous = error_context_stack;
194 error_context_stack = &plerrcontext;
195
196 /*
197 * For a procedure or function declared to return void, the Python
198 * return value must be None. For void-returning functions, we also
199 * treat a None return value as a special "void datum" rather than
200 * NULL (as is the case for non-void-returning functions).
201 */
202 if (proc->result.typoid == VOIDOID)
203 {
204 if (plrv != Py_None)
205 {
206 if (proc->is_procedure)
208 (errcode(ERRCODE_DATATYPE_MISMATCH),
209 errmsg("PL/Python procedure did not return None")));
210 else
212 (errcode(ERRCODE_DATATYPE_MISMATCH),
213 errmsg("PL/Python function with return type \"void\" did not return None")));
214 }
215
216 fcinfo->isnull = false;
217 rv = (Datum) 0;
218 }
219 else if (plrv == Py_None &&
220 srfstate && srfstate->iter == NULL)
221 {
222 /*
223 * In a SETOF function, the iteration-ending null isn't a real
224 * value; don't pass it through the input function, which might
225 * complain.
226 */
227 fcinfo->isnull = true;
228 rv = (Datum) 0;
229 }
230 else
231 {
232 /*
233 * Normal conversion of result. However, if the result is of type
234 * RECORD, we have to set up for that each time through, since it
235 * might be different from last time.
236 */
237 if (proc->result.typoid == RECORDOID)
238 {
239 TupleDesc desc;
240
241 if (get_call_result_type(fcinfo, NULL, &desc) != TYPEFUNC_COMPOSITE)
243 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
244 errmsg("function returning record called in context "
245 "that cannot accept type record")));
246 PLy_output_setup_record(&proc->result, desc, proc);
247 }
248
249 rv = PLy_output_convert(&proc->result, plrv,
250 &fcinfo->isnull);
251 }
252 }
253 PG_CATCH();
254 {
255 /* Pop old arguments from the stack if they were pushed above */
257
258 Py_XDECREF(plargs);
259 Py_XDECREF(plrv);
260
261 /*
262 * If there was an error within a SRF, the iterator might not have
263 * been exhausted yet. Clear it so the next invocation of the
264 * function will start the iteration again. (This code is probably
265 * unnecessary now; plpython_srf_cleanup_callback should take care of
266 * cleanup. But it doesn't hurt anything to do it here.)
267 */
268 if (srfstate)
269 {
270 Py_XDECREF(srfstate->iter);
271 srfstate->iter = NULL;
272 /* And drop any saved args; we won't need them */
273 if (srfstate->savedargs)
275 srfstate->savedargs = NULL;
276 }
277
278 PG_RE_THROW();
279 }
280 PG_END_TRY();
281
282 error_context_stack = plerrcontext.previous;
283
284 /* Pop old arguments from the stack if they were pushed above */
286
287 Py_XDECREF(plargs);
288 Py_DECREF(plrv);
289
290 if (srfstate)
291 {
292 /* We're in a SRF, exit appropriately */
293 if (srfstate->iter == NULL)
294 {
295 /* Iterator exhausted, so we're done */
296 SRF_RETURN_DONE(funcctx);
297 }
298 else if (fcinfo->isnull)
299 SRF_RETURN_NEXT_NULL(funcctx);
300 else
301 SRF_RETURN_NEXT(funcctx, rv);
302 }
303
304 /* Plain function, just return the Datum value (possibly null) */
305 return rv;
306}
int errdetail(const char *fmt,...)
Definition: elog.c:1203
ErrorContextCallback * error_context_stack
Definition: elog.c:94
int errcode(int sqlerrcode)
Definition: elog.c:853
#define PG_RE_THROW()
Definition: elog.h:412
#define PG_TRY(...)
Definition: elog.h:371
#define PG_END_TRY(...)
Definition: elog.h:396
#define ERROR
Definition: elog.h:39
#define PG_CATCH(...)
Definition: elog.h:381
#define elog(elevel,...)
Definition: elog.h:225
@ SFRM_ValuePerCall
Definition: execnodes.h:334
TypeFuncClass get_call_result_type(FunctionCallInfo fcinfo, Oid *resultTypeId, TupleDesc *resultTupleDesc)
Definition: funcapi.c:276
#define SRF_IS_FIRSTCALL()
Definition: funcapi.h:304
#define SRF_RETURN_NEXT_NULL(_funcctx)
Definition: funcapi.h:319
#define SRF_PERCALL_SETUP()
Definition: funcapi.h:308
@ TYPEFUNC_COMPOSITE
Definition: funcapi.h:149
#define SRF_RETURN_NEXT(_funcctx, _result)
Definition: funcapi.h:310
#define SRF_FIRSTCALL_INIT()
Definition: funcapi.h:306
#define SRF_RETURN_DONE(_funcctx)
Definition: funcapi.h:328
if(TABLE==NULL||TABLE_index==NULL)
Definition: isn.c:76
#define PLy_elog
void * MemoryContextAllocZero(MemoryContext context, Size size)
Definition: mcxt.c:1215
void MemoryContextRegisterResetCallback(MemoryContext context, MemoryContextCallback *cb)
Definition: mcxt.c:568
#define IsA(nodeptr, _type_)
Definition: nodes.h:158
static void PLy_global_args_push(PLyProcedure *proc)
Definition: plpy_exec.c:611
static PyObject * PLy_function_build_args(FunctionCallInfo fcinfo, PLyProcedure *proc)
Definition: plpy_exec.c:433
static void PLy_function_restore_args(PLyProcedure *proc, PLySavedArgs *savedargs)
Definition: plpy_exec.c:542
static PyObject * PLy_procedure_call(PLyProcedure *proc, const char *kargs, PyObject *vargs)
Definition: plpy_exec.c:1060
static void PLy_global_args_pop(PLyProcedure *proc)
Definition: plpy_exec.c:641
static void plpython_srf_cleanup_callback(void *arg)
Definition: plpy_exec.c:679
static PLySavedArgs * PLy_function_save_args(PLyProcedure *proc)
Definition: plpy_exec.c:496
static void plpython_return_error_callback(void *arg)
Definition: plpy_exec.c:693
void PLy_output_setup_record(PLyObToDatum *arg, TupleDesc desc, PLyProcedure *proc)
Definition: plpy_typeio.c:261
Datum PLy_output_convert(PLyObToDatum *arg, PyObject *val, bool *isnull)
Definition: plpy_typeio.c:120
uintptr_t Datum
Definition: postgres.h:69
int SPI_finish(void)
Definition: spi.c:182
#define SPI_OK_FINISH
Definition: spi.h:83
struct ErrorContextCallback * previous
Definition: elog.h:296
void(* callback)(void *arg)
Definition: elog.h:297
void * user_fctx
Definition: funcapi.h:82
MemoryContext multi_call_memory_ctx
Definition: funcapi.h:101
fmNodePtr resultinfo
Definition: fmgr.h:89
MemoryContextCallbackFunction func
Definition: palloc.h:49
PLyObToDatum result
MemoryContextCallback callback
Definition: plpy_exec.c:29
SetFunctionReturnMode returnMode
Definition: execnodes.h:354
int allowedModes
Definition: execnodes.h:352

References ReturnSetInfo::allowedModes, MemoryContextCallback::arg, Assert, ErrorContextCallback::callback, PLySRFState::callback, elog, ereport, errcode(), errdetail(), errmsg(), ERROR, error_context_stack, MemoryContextCallback::func, get_call_result_type(), if(), PLyProcedure::is_procedure, PLyProcedure::is_setof, IsA, FunctionCallInfoBaseData::isnull, PLySRFState::iter, MemoryContextAllocZero(), MemoryContextRegisterResetCallback(), FuncCallContext::multi_call_memory_ctx, PG_CATCH, PG_END_TRY, PG_RE_THROW, PG_TRY, plpython_return_error_callback(), plpython_srf_cleanup_callback(), PLy_elog, PLy_function_build_args(), PLy_function_drop_args(), PLy_function_restore_args(), PLy_function_save_args(), PLy_global_args_pop(), PLy_global_args_push(), PLy_output_convert(), PLy_output_setup_record(), PLy_procedure_call(), ErrorContextCallback::previous, PLyProcedure::result, FunctionCallInfoBaseData::resultinfo, ReturnSetInfo::returnMode, PLySRFState::savedargs, SFRM_ValuePerCall, SPI_finish(), SPI_OK_FINISH, SRF_FIRSTCALL_INIT, SRF_IS_FIRSTCALL, SRF_PERCALL_SETUP, SRF_RETURN_DONE, SRF_RETURN_NEXT, SRF_RETURN_NEXT_NULL, TYPEFUNC_COMPOSITE, PLyObToDatum::typoid, and FuncCallContext::user_fctx.

Referenced by plpython3_call_handler(), and plpython3_inline_handler().

◆ PLy_exec_trigger()

HeapTuple PLy_exec_trigger ( FunctionCallInfo  fcinfo,
PLyProcedure proc 
)

Definition at line 319 of file plpy_exec.c.

320{
321 HeapTuple rv = NULL;
322 PyObject *volatile plargs = NULL;
323 PyObject *volatile plrv = NULL;
324 TriggerData *tdata;
325 TupleDesc rel_descr;
326
327 Assert(CALLED_AS_TRIGGER(fcinfo));
328 tdata = (TriggerData *) fcinfo->context;
329
330 /*
331 * Input/output conversion for trigger tuples. We use the result and
332 * result_in fields to store the tuple conversion info. We do this over
333 * again on each call to cover the possibility that the relation's tupdesc
334 * changed since the trigger was last called. The PLy_xxx_setup_func
335 * calls should only happen once, but PLy_input_setup_tuple and
336 * PLy_output_setup_tuple are responsible for not doing repetitive work.
337 */
338 rel_descr = RelationGetDescr(tdata->tg_relation);
339 if (proc->result.typoid != rel_descr->tdtypeid)
340 PLy_output_setup_func(&proc->result, proc->mcxt,
341 rel_descr->tdtypeid,
342 rel_descr->tdtypmod,
343 proc);
344 if (proc->result_in.typoid != rel_descr->tdtypeid)
345 PLy_input_setup_func(&proc->result_in, proc->mcxt,
346 rel_descr->tdtypeid,
347 rel_descr->tdtypmod,
348 proc);
349 PLy_output_setup_tuple(&proc->result, rel_descr, proc);
350 PLy_input_setup_tuple(&proc->result_in, rel_descr, proc);
351
352 /*
353 * If the trigger is called recursively, we must push outer-level
354 * arguments into the stack. This must be immediately before the PG_TRY
355 * to ensure that the corresponding pop happens.
356 */
358
359 PG_TRY();
360 {
362
363 rc = SPI_register_trigger_data(tdata);
364 Assert(rc >= 0);
365
366 plargs = PLy_trigger_build_args(fcinfo, proc, &rv);
367 plrv = PLy_procedure_call(proc, "TD", plargs);
368
369 Assert(plrv != NULL);
370
371 /*
372 * Disconnect from SPI manager
373 */
374 if (SPI_finish() != SPI_OK_FINISH)
375 elog(ERROR, "SPI_finish failed");
376
377 /*
378 * return of None means we're happy with the tuple
379 */
380 if (plrv != Py_None)
381 {
382 char *srv;
383
384 if (PyUnicode_Check(plrv))
385 srv = PLyUnicode_AsString(plrv);
386 else
387 {
389 (errcode(ERRCODE_DATA_EXCEPTION),
390 errmsg("unexpected return value from trigger procedure"),
391 errdetail("Expected None or a string.")));
392 srv = NULL; /* keep compiler quiet */
393 }
394
395 if (pg_strcasecmp(srv, "SKIP") == 0)
396 rv = NULL;
397 else if (pg_strcasecmp(srv, "MODIFY") == 0)
398 {
399 if (TRIGGER_FIRED_BY_INSERT(tdata->tg_event) ||
401 rv = PLy_modify_tuple(proc, plargs, tdata, rv);
402 else
404 (errmsg("PL/Python trigger function returned \"MODIFY\" in a DELETE trigger -- ignored")));
405 }
406 else if (pg_strcasecmp(srv, "OK") != 0)
407 {
408 /*
409 * accept "OK" as an alternative to None; otherwise, raise an
410 * error
411 */
413 (errcode(ERRCODE_DATA_EXCEPTION),
414 errmsg("unexpected return value from trigger procedure"),
415 errdetail("Expected None, \"OK\", \"SKIP\", or \"MODIFY\".")));
416 }
417 }
418 }
419 PG_FINALLY();
420 {
422 Py_XDECREF(plargs);
423 Py_XDECREF(plrv);
424 }
425 PG_END_TRY();
426
427 return rv;
428}
#define PG_USED_FOR_ASSERTS_ONLY
Definition: c.h:204
#define PG_FINALLY(...)
Definition: elog.h:388
static PyObject * PLy_trigger_build_args(FunctionCallInfo fcinfo, PLyProcedure *proc, HeapTuple *rv)
Definition: plpy_exec.c:703
static HeapTuple PLy_modify_tuple(PLyProcedure *proc, PyObject *pltd, TriggerData *tdata, HeapTuple otup)
Definition: plpy_exec.c:920
void PLy_output_setup_func(PLyObToDatum *arg, MemoryContext arg_mcxt, Oid typeOid, int32 typmod, PLyProcedure *proc)
Definition: plpy_typeio.c:296
void PLy_input_setup_func(PLyDatumToOb *arg, MemoryContext arg_mcxt, Oid typeOid, int32 typmod, PLyProcedure *proc)
Definition: plpy_typeio.c:418
void PLy_input_setup_tuple(PLyDatumToOb *arg, TupleDesc desc, PLyProcedure *proc)
Definition: plpy_typeio.c:165
void PLy_output_setup_tuple(PLyObToDatum *arg, TupleDesc desc, PLyProcedure *proc)
Definition: plpy_typeio.c:215
char * PLyUnicode_AsString(PyObject *unicode)
Definition: plpy_util.c:82
int pg_strcasecmp(const char *s1, const char *s2)
Definition: pgstrcasecmp.c:36
#define RelationGetDescr(relation)
Definition: rel.h:531
int SPI_register_trigger_data(TriggerData *tdata)
Definition: spi.c:3364
fmNodePtr context
Definition: fmgr.h:88
PLyDatumToOb result_in
MemoryContext mcxt
Relation tg_relation
Definition: trigger.h:35
TriggerEvent tg_event
Definition: trigger.h:34
int32 tdtypmod
Definition: tupdesc.h:132
Oid tdtypeid
Definition: tupdesc.h:131
#define CALLED_AS_TRIGGER(fcinfo)
Definition: trigger.h:26
#define TRIGGER_FIRED_BY_INSERT(event)
Definition: trigger.h:110
#define TRIGGER_FIRED_BY_UPDATE(event)
Definition: trigger.h:116

References Assert, CALLED_AS_TRIGGER, FunctionCallInfoBaseData::context, elog, ereport, errcode(), errdetail(), errmsg(), ERROR, PLyProcedure::mcxt, PG_END_TRY, PG_FINALLY, pg_strcasecmp(), PG_TRY, PG_USED_FOR_ASSERTS_ONLY, PLy_global_args_pop(), PLy_global_args_push(), PLy_input_setup_func(), PLy_input_setup_tuple(), PLy_modify_tuple(), PLy_output_setup_func(), PLy_output_setup_tuple(), PLy_procedure_call(), PLy_trigger_build_args(), PLyUnicode_AsString(), RelationGetDescr, PLyProcedure::result, PLyProcedure::result_in, SPI_finish(), SPI_OK_FINISH, SPI_register_trigger_data(), TupleDescData::tdtypeid, TupleDescData::tdtypmod, TriggerData::tg_event, TriggerData::tg_relation, TRIGGER_FIRED_BY_INSERT, TRIGGER_FIRED_BY_UPDATE, PLyDatumToOb::typoid, PLyObToDatum::typoid, and WARNING.

Referenced by plpython3_call_handler().

◆ PLy_function_build_args()

static PyObject * PLy_function_build_args ( FunctionCallInfo  fcinfo,
PLyProcedure proc 
)
static

Definition at line 433 of file plpy_exec.c.

434{
435 PyObject *volatile arg = NULL;
436 PyObject *args;
437 int i;
438
439 /*
440 * Make any Py*_New() calls before the PG_TRY block so that we can quickly
441 * return NULL on failure. We can't return within the PG_TRY block, else
442 * we'd miss unwinding the exception stack.
443 */
444 args = PyList_New(proc->nargs);
445 if (!args)
446 return NULL;
447
448 PG_TRY();
449 {
450 for (i = 0; i < proc->nargs; i++)
451 {
452 PLyDatumToOb *arginfo = &proc->args[i];
453
454 if (fcinfo->args[i].isnull)
455 arg = NULL;
456 else
457 arg = PLy_input_convert(arginfo, fcinfo->args[i].value);
458
459 if (arg == NULL)
460 {
461 Py_INCREF(Py_None);
462 arg = Py_None;
463 }
464
465 if (PyList_SetItem(args, i, arg) == -1)
466 PLy_elog(ERROR, "PyList_SetItem() failed, while setting up arguments");
467
468 if (proc->argnames && proc->argnames[i] &&
469 PyDict_SetItemString(proc->globals, proc->argnames[i], arg) == -1)
470 PLy_elog(ERROR, "PyDict_SetItemString() failed, while setting up arguments");
471 arg = NULL;
472 }
473 }
474 PG_CATCH();
475 {
476 Py_XDECREF(arg);
477 Py_XDECREF(args);
478
479 PG_RE_THROW();
480 }
481 PG_END_TRY();
482
483 return args;
484}
int i
Definition: isn.c:72
PyObject * PLy_input_convert(PLyDatumToOb *arg, Datum val)
Definition: plpy_typeio.c:81
NullableDatum args[FLEXIBLE_ARRAY_MEMBER]
Definition: fmgr.h:95
Datum value
Definition: postgres.h:80
bool isnull
Definition: postgres.h:82
PLyDatumToOb * args
char ** argnames
PyObject * globals

References arg, PLyProcedure::argnames, generate_unaccent_rules::args, FunctionCallInfoBaseData::args, PLyProcedure::args, ERROR, PLyProcedure::globals, i, NullableDatum::isnull, PLyProcedure::nargs, PG_CATCH, PG_END_TRY, PG_RE_THROW, PG_TRY, PLy_elog, PLy_input_convert(), and NullableDatum::value.

Referenced by PLy_exec_function().

◆ PLy_function_drop_args()

static void PLy_function_drop_args ( PLySavedArgs savedargs)
static

Definition at line 582 of file plpy_exec.c.

583{
584 int i;
585
586 /* Drop references for named args */
587 for (i = 0; i < savedargs->nargs; i++)
588 {
589 Py_XDECREF(savedargs->namedargs[i]);
590 }
591
592 /* Drop refs to the "args" and "TD" objects, too */
593 Py_XDECREF(savedargs->args);
594 Py_XDECREF(savedargs->td);
595
596 /* And free the PLySavedArgs struct */
597 pfree(savedargs);
598}
PyObject * args
PyObject * namedargs[FLEXIBLE_ARRAY_MEMBER]
PyObject * td

References PLySavedArgs::args, i, PLySavedArgs::namedargs, PLySavedArgs::nargs, pfree(), and PLySavedArgs::td.

Referenced by plpython_srf_cleanup_callback(), and PLy_exec_function().

◆ PLy_function_restore_args()

static void PLy_function_restore_args ( PLyProcedure proc,
PLySavedArgs savedargs 
)
static

Definition at line 542 of file plpy_exec.c.

543{
544 /* Restore named arguments into their slots in the globals dict */
545 if (proc->argnames)
546 {
547 int i;
548
549 for (i = 0; i < savedargs->nargs; i++)
550 {
551 if (proc->argnames[i] && savedargs->namedargs[i])
552 {
553 PyDict_SetItemString(proc->globals, proc->argnames[i],
554 savedargs->namedargs[i]);
555 Py_DECREF(savedargs->namedargs[i]);
556 }
557 }
558 }
559
560 /* Restore the "args" object, too */
561 if (savedargs->args)
562 {
563 PyDict_SetItemString(proc->globals, "args", savedargs->args);
564 Py_DECREF(savedargs->args);
565 }
566
567 /* Restore the "TD" object, too */
568 if (savedargs->td)
569 {
570 PyDict_SetItemString(proc->globals, "TD", savedargs->td);
571 Py_DECREF(savedargs->td);
572 }
573
574 /* And free the PLySavedArgs struct */
575 pfree(savedargs);
576}

References PLyProcedure::argnames, PLySavedArgs::args, PLyProcedure::globals, i, PLySavedArgs::namedargs, PLySavedArgs::nargs, pfree(), and PLySavedArgs::td.

Referenced by PLy_exec_function(), and PLy_global_args_pop().

◆ PLy_function_save_args()

static PLySavedArgs * PLy_function_save_args ( PLyProcedure proc)
static

Definition at line 496 of file plpy_exec.c.

497{
498 PLySavedArgs *result;
499
500 /* saved args are always allocated in procedure's context */
501 result = (PLySavedArgs *)
503 offsetof(PLySavedArgs, namedargs) +
504 proc->nargs * sizeof(PyObject *));
505 result->nargs = proc->nargs;
506
507 /* Fetch the "args" list */
508 result->args = PyDict_GetItemString(proc->globals, "args");
509 Py_XINCREF(result->args);
510
511 /* If it's a trigger, also save "TD" */
512 if (proc->is_trigger)
513 {
514 result->td = PyDict_GetItemString(proc->globals, "TD");
515 Py_XINCREF(result->td);
516 }
517
518 /* Fetch all the named arguments */
519 if (proc->argnames)
520 {
521 int i;
522
523 for (i = 0; i < result->nargs; i++)
524 {
525 if (proc->argnames[i])
526 {
527 result->namedargs[i] = PyDict_GetItemString(proc->globals,
528 proc->argnames[i]);
529 Py_XINCREF(result->namedargs[i]);
530 }
531 }
532 }
533
534 return result;
535}

References PLyProcedure::argnames, PLySavedArgs::args, PLyProcedure::globals, i, PLyProcedure::is_trigger, PLyProcedure::mcxt, MemoryContextAllocZero(), PLySavedArgs::namedargs, PLySavedArgs::nargs, PLyProcedure::nargs, and PLySavedArgs::td.

Referenced by PLy_exec_function(), and PLy_global_args_push().

◆ PLy_global_args_pop()

static void PLy_global_args_pop ( PLyProcedure proc)
static

Definition at line 641 of file plpy_exec.c.

642{
643 Assert(proc->calldepth > 0);
644 /* We only need to pop if we were already inside some active call */
645 if (proc->calldepth > 1)
646 {
647 PLySavedArgs *ptr = proc->argstack;
648
649 /* Pop the callstack */
650 Assert(ptr != NULL);
651 proc->argstack = ptr->next;
652 proc->calldepth--;
653
654 /* Restore argument values, then free ptr */
655 PLy_function_restore_args(proc, ptr);
656 }
657 else
658 {
659 /* Exiting call depth 1 */
660 Assert(proc->argstack == NULL);
661 proc->calldepth--;
662
663 /*
664 * We used to delete the named arguments (but not "args") from the
665 * proc's globals dict when exiting the outermost call level for a
666 * function. This seems rather pointless though: nothing can see the
667 * dict until the function is called again, at which time we'll
668 * overwrite those dict entries. So don't bother with that.
669 */
670 }
671}
PLySavedArgs * argstack
struct PLySavedArgs * next

References PLyProcedure::argstack, Assert, PLyProcedure::calldepth, PLySavedArgs::next, and PLy_function_restore_args().

Referenced by PLy_exec_function(), and PLy_exec_trigger().

◆ PLy_global_args_push()

static void PLy_global_args_push ( PLyProcedure proc)
static

Definition at line 611 of file plpy_exec.c.

612{
613 /* We only need to push if we are already inside some active call */
614 if (proc->calldepth > 0)
615 {
616 PLySavedArgs *node;
617
618 /* Build a struct containing current argument values */
619 node = PLy_function_save_args(proc);
620
621 /*
622 * Push the saved argument values into the procedure's stack. Once we
623 * modify either proc->argstack or proc->calldepth, we had better
624 * return without the possibility of error.
625 */
626 node->next = proc->argstack;
627 proc->argstack = node;
628 }
629 proc->calldepth++;
630}

References PLyProcedure::argstack, PLyProcedure::calldepth, PLySavedArgs::next, and PLy_function_save_args().

Referenced by PLy_exec_function(), and PLy_exec_trigger().

◆ PLy_modify_tuple()

static HeapTuple PLy_modify_tuple ( PLyProcedure proc,
PyObject *  pltd,
TriggerData tdata,
HeapTuple  otup 
)
static

Definition at line 920 of file plpy_exec.c.

922{
923 HeapTuple rtup;
924 PyObject *volatile plntup;
925 PyObject *volatile plkeys;
926 PyObject *volatile plval;
927 Datum *volatile modvalues;
928 bool *volatile modnulls;
929 bool *volatile modrepls;
930 ErrorContextCallback plerrcontext;
931
933 plerrcontext.previous = error_context_stack;
934 error_context_stack = &plerrcontext;
935
936 plntup = plkeys = plval = NULL;
937 modvalues = NULL;
938 modnulls = NULL;
939 modrepls = NULL;
940
941 PG_TRY();
942 {
943 TupleDesc tupdesc;
944 int nkeys,
945 i;
946
947 if ((plntup = PyDict_GetItemString(pltd, "new")) == NULL)
949 (errcode(ERRCODE_UNDEFINED_OBJECT),
950 errmsg("TD[\"new\"] deleted, cannot modify row")));
951 Py_INCREF(plntup);
952 if (!PyDict_Check(plntup))
954 (errcode(ERRCODE_DATATYPE_MISMATCH),
955 errmsg("TD[\"new\"] is not a dictionary")));
956
957 plkeys = PyDict_Keys(plntup);
958 nkeys = PyList_Size(plkeys);
959
960 tupdesc = RelationGetDescr(tdata->tg_relation);
961
962 modvalues = (Datum *) palloc0(tupdesc->natts * sizeof(Datum));
963 modnulls = (bool *) palloc0(tupdesc->natts * sizeof(bool));
964 modrepls = (bool *) palloc0(tupdesc->natts * sizeof(bool));
965
966 for (i = 0; i < nkeys; i++)
967 {
968 PyObject *platt;
969 char *plattstr;
970 int attn;
971 PLyObToDatum *att;
972
973 platt = PyList_GetItem(plkeys, i);
974 if (PyUnicode_Check(platt))
975 plattstr = PLyUnicode_AsString(platt);
976 else
977 {
979 (errcode(ERRCODE_DATATYPE_MISMATCH),
980 errmsg("TD[\"new\"] dictionary key at ordinal position %d is not a string", i)));
981 plattstr = NULL; /* keep compiler quiet */
982 }
983 attn = SPI_fnumber(tupdesc, plattstr);
984 if (attn == SPI_ERROR_NOATTRIBUTE)
986 (errcode(ERRCODE_UNDEFINED_COLUMN),
987 errmsg("key \"%s\" found in TD[\"new\"] does not exist as a column in the triggering row",
988 plattstr)));
989 if (attn <= 0)
991 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
992 errmsg("cannot set system attribute \"%s\"",
993 plattstr)));
994 if (TupleDescAttr(tupdesc, attn - 1)->attgenerated)
996 (errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
997 errmsg("cannot set generated column \"%s\"",
998 plattstr)));
999
1000 plval = PyDict_GetItem(plntup, platt);
1001 if (plval == NULL)
1002 elog(FATAL, "Python interpreter is probably corrupted");
1003
1004 Py_INCREF(plval);
1005
1006 /* We assume proc->result is set up to convert tuples properly */
1007 att = &proc->result.u.tuple.atts[attn - 1];
1008
1009 modvalues[attn - 1] = PLy_output_convert(att,
1010 plval,
1011 &modnulls[attn - 1]);
1012 modrepls[attn - 1] = true;
1013
1014 Py_DECREF(plval);
1015 plval = NULL;
1016 }
1017
1018 rtup = heap_modify_tuple(otup, tupdesc, modvalues, modnulls, modrepls);
1019 }
1020 PG_CATCH();
1021 {
1022 Py_XDECREF(plntup);
1023 Py_XDECREF(plkeys);
1024 Py_XDECREF(plval);
1025
1026 if (modvalues)
1027 pfree(modvalues);
1028 if (modnulls)
1029 pfree(modnulls);
1030 if (modrepls)
1031 pfree(modrepls);
1032
1033 PG_RE_THROW();
1034 }
1035 PG_END_TRY();
1036
1037 Py_DECREF(plntup);
1038 Py_DECREF(plkeys);
1039
1040 pfree(modvalues);
1041 pfree(modnulls);
1042 pfree(modrepls);
1043
1044 error_context_stack = plerrcontext.previous;
1045
1046 return rtup;
1047}
#define FATAL
Definition: elog.h:41
HeapTuple heap_modify_tuple(HeapTuple tuple, TupleDesc tupleDesc, const Datum *replValues, const bool *replIsnull, const bool *doReplace)
Definition: heaptuple.c:1210
void * palloc0(Size size)
Definition: mcxt.c:1347
static void plpython_trigger_error_callback(void *arg)
Definition: plpy_exec.c:1050
int SPI_fnumber(TupleDesc tupdesc, const char *fname)
Definition: spi.c:1175
#define SPI_ERROR_NOATTRIBUTE
Definition: spi.h:76
PLyObToTuple tuple
Definition: plpy_typeio.h:143
union PLyObToDatum::@188 u
PLyObToDatum * atts
Definition: plpy_typeio.h:113
static FormData_pg_attribute * TupleDescAttr(TupleDesc tupdesc, int i)
Definition: tupdesc.h:153

References PLyObToTuple::atts, ErrorContextCallback::callback, elog, ereport, errcode(), errmsg(), ERROR, error_context_stack, FATAL, heap_modify_tuple(), i, TupleDescData::natts, palloc0(), pfree(), PG_CATCH, PG_END_TRY, PG_RE_THROW, PG_TRY, plpython_trigger_error_callback(), PLy_output_convert(), PLyUnicode_AsString(), ErrorContextCallback::previous, RelationGetDescr, PLyProcedure::result, SPI_ERROR_NOATTRIBUTE, SPI_fnumber(), TriggerData::tg_relation, PLyObToDatum::tuple, TupleDescAttr(), and PLyObToDatum::u.

Referenced by PLy_exec_trigger().

◆ PLy_procedure_call()

static PyObject * PLy_procedure_call ( PLyProcedure proc,
const char *  kargs,
PyObject *  vargs 
)
static

Definition at line 1060 of file plpy_exec.c.

1061{
1062 PyObject *rv = NULL;
1063 int volatile save_subxact_level = list_length(explicit_subtransactions);
1064
1065 PyDict_SetItemString(proc->globals, kargs, vargs);
1066
1067 PG_TRY();
1068 {
1069#if PY_VERSION_HEX >= 0x03020000
1070 rv = PyEval_EvalCode(proc->code,
1071 proc->globals, proc->globals);
1072#else
1073 rv = PyEval_EvalCode((PyCodeObject *) proc->code,
1074 proc->globals, proc->globals);
1075#endif
1076
1077 /*
1078 * Since plpy will only let you close subtransactions that you
1079 * started, you cannot *unnest* subtransactions, only *nest* them
1080 * without closing.
1081 */
1082 Assert(list_length(explicit_subtransactions) >= save_subxact_level);
1083 }
1084 PG_FINALLY();
1085 {
1086 PLy_abort_open_subtransactions(save_subxact_level);
1087 }
1088 PG_END_TRY();
1089
1090 /* If the Python code returned an error, propagate it */
1091 if (rv == NULL)
1092 PLy_elog(ERROR, NULL);
1093
1094 return rv;
1095}
static void PLy_abort_open_subtransactions(int save_subxact_level)
Definition: plpy_exec.c:1102
PyObject * code

References Assert, PLyProcedure::code, ERROR, explicit_subtransactions, PLyProcedure::globals, list_length(), PG_END_TRY, PG_FINALLY, PG_TRY, PLy_abort_open_subtransactions(), and PLy_elog.

Referenced by PLy_exec_function(), and PLy_exec_trigger().

◆ PLy_trigger_build_args()

static PyObject * PLy_trigger_build_args ( FunctionCallInfo  fcinfo,
PLyProcedure proc,
HeapTuple rv 
)
static

Definition at line 703 of file plpy_exec.c.

704{
705 TriggerData *tdata = (TriggerData *) fcinfo->context;
706 TupleDesc rel_descr = RelationGetDescr(tdata->tg_relation);
707 PyObject *pltname,
708 *pltevent,
709 *pltwhen,
710 *pltlevel,
711 *pltrelid,
712 *plttablename,
713 *plttableschema,
714 *pltargs,
715 *pytnew,
716 *pytold,
717 *pltdata;
718 char *stroid;
719
720 /*
721 * Make any Py*_New() calls before the PG_TRY block so that we can quickly
722 * return NULL on failure. We can't return within the PG_TRY block, else
723 * we'd miss unwinding the exception stack.
724 */
725 pltdata = PyDict_New();
726 if (!pltdata)
727 return NULL;
728
729 if (tdata->tg_trigger->tgnargs)
730 {
731 pltargs = PyList_New(tdata->tg_trigger->tgnargs);
732 if (!pltargs)
733 {
734 Py_DECREF(pltdata);
735 return NULL;
736 }
737 }
738 else
739 {
740 Py_INCREF(Py_None);
741 pltargs = Py_None;
742 }
743
744 PG_TRY();
745 {
746 pltname = PLyUnicode_FromString(tdata->tg_trigger->tgname);
747 PyDict_SetItemString(pltdata, "name", pltname);
748 Py_DECREF(pltname);
749
752 pltrelid = PLyUnicode_FromString(stroid);
753 PyDict_SetItemString(pltdata, "relid", pltrelid);
754 Py_DECREF(pltrelid);
755 pfree(stroid);
756
757 stroid = SPI_getrelname(tdata->tg_relation);
758 plttablename = PLyUnicode_FromString(stroid);
759 PyDict_SetItemString(pltdata, "table_name", plttablename);
760 Py_DECREF(plttablename);
761 pfree(stroid);
762
763 stroid = SPI_getnspname(tdata->tg_relation);
764 plttableschema = PLyUnicode_FromString(stroid);
765 PyDict_SetItemString(pltdata, "table_schema", plttableschema);
766 Py_DECREF(plttableschema);
767 pfree(stroid);
768
769 if (TRIGGER_FIRED_BEFORE(tdata->tg_event))
770 pltwhen = PLyUnicode_FromString("BEFORE");
771 else if (TRIGGER_FIRED_AFTER(tdata->tg_event))
772 pltwhen = PLyUnicode_FromString("AFTER");
773 else if (TRIGGER_FIRED_INSTEAD(tdata->tg_event))
774 pltwhen = PLyUnicode_FromString("INSTEAD OF");
775 else
776 {
777 elog(ERROR, "unrecognized WHEN tg_event: %u", tdata->tg_event);
778 pltwhen = NULL; /* keep compiler quiet */
779 }
780 PyDict_SetItemString(pltdata, "when", pltwhen);
781 Py_DECREF(pltwhen);
782
784 {
785 pltlevel = PLyUnicode_FromString("ROW");
786 PyDict_SetItemString(pltdata, "level", pltlevel);
787 Py_DECREF(pltlevel);
788
789 /*
790 * Note: In BEFORE trigger, stored generated columns are not
791 * computed yet, so don't make them accessible in NEW row.
792 */
793
795 {
796 pltevent = PLyUnicode_FromString("INSERT");
797
798 PyDict_SetItemString(pltdata, "old", Py_None);
799 pytnew = PLy_input_from_tuple(&proc->result_in,
800 tdata->tg_trigtuple,
801 rel_descr,
803 PyDict_SetItemString(pltdata, "new", pytnew);
804 Py_DECREF(pytnew);
805 *rv = tdata->tg_trigtuple;
806 }
807 else if (TRIGGER_FIRED_BY_DELETE(tdata->tg_event))
808 {
809 pltevent = PLyUnicode_FromString("DELETE");
810
811 PyDict_SetItemString(pltdata, "new", Py_None);
812 pytold = PLy_input_from_tuple(&proc->result_in,
813 tdata->tg_trigtuple,
814 rel_descr,
815 true);
816 PyDict_SetItemString(pltdata, "old", pytold);
817 Py_DECREF(pytold);
818 *rv = tdata->tg_trigtuple;
819 }
820 else if (TRIGGER_FIRED_BY_UPDATE(tdata->tg_event))
821 {
822 pltevent = PLyUnicode_FromString("UPDATE");
823
824 pytnew = PLy_input_from_tuple(&proc->result_in,
825 tdata->tg_newtuple,
826 rel_descr,
828 PyDict_SetItemString(pltdata, "new", pytnew);
829 Py_DECREF(pytnew);
830 pytold = PLy_input_from_tuple(&proc->result_in,
831 tdata->tg_trigtuple,
832 rel_descr,
833 true);
834 PyDict_SetItemString(pltdata, "old", pytold);
835 Py_DECREF(pytold);
836 *rv = tdata->tg_newtuple;
837 }
838 else
839 {
840 elog(ERROR, "unrecognized OP tg_event: %u", tdata->tg_event);
841 pltevent = NULL; /* keep compiler quiet */
842 }
843
844 PyDict_SetItemString(pltdata, "event", pltevent);
845 Py_DECREF(pltevent);
846 }
847 else if (TRIGGER_FIRED_FOR_STATEMENT(tdata->tg_event))
848 {
849 pltlevel = PLyUnicode_FromString("STATEMENT");
850 PyDict_SetItemString(pltdata, "level", pltlevel);
851 Py_DECREF(pltlevel);
852
853 PyDict_SetItemString(pltdata, "old", Py_None);
854 PyDict_SetItemString(pltdata, "new", Py_None);
855 *rv = NULL;
856
858 pltevent = PLyUnicode_FromString("INSERT");
859 else if (TRIGGER_FIRED_BY_DELETE(tdata->tg_event))
860 pltevent = PLyUnicode_FromString("DELETE");
861 else if (TRIGGER_FIRED_BY_UPDATE(tdata->tg_event))
862 pltevent = PLyUnicode_FromString("UPDATE");
863 else if (TRIGGER_FIRED_BY_TRUNCATE(tdata->tg_event))
864 pltevent = PLyUnicode_FromString("TRUNCATE");
865 else
866 {
867 elog(ERROR, "unrecognized OP tg_event: %u", tdata->tg_event);
868 pltevent = NULL; /* keep compiler quiet */
869 }
870
871 PyDict_SetItemString(pltdata, "event", pltevent);
872 Py_DECREF(pltevent);
873 }
874 else
875 elog(ERROR, "unrecognized LEVEL tg_event: %u", tdata->tg_event);
876
877 if (tdata->tg_trigger->tgnargs)
878 {
879 /*
880 * all strings...
881 */
882 int i;
883 PyObject *pltarg;
884
885 /* pltargs should have been allocated before the PG_TRY block. */
886 Assert(pltargs && pltargs != Py_None);
887
888 for (i = 0; i < tdata->tg_trigger->tgnargs; i++)
889 {
890 pltarg = PLyUnicode_FromString(tdata->tg_trigger->tgargs[i]);
891
892 /*
893 * stolen, don't Py_DECREF
894 */
895 PyList_SetItem(pltargs, i, pltarg);
896 }
897 }
898 else
899 {
900 Assert(pltargs == Py_None);
901 }
902 PyDict_SetItemString(pltdata, "args", pltargs);
903 Py_DECREF(pltargs);
904 }
905 PG_CATCH();
906 {
907 Py_XDECREF(pltargs);
908 Py_XDECREF(pltdata);
909 PG_RE_THROW();
910 }
911 PG_END_TRY();
912
913 return pltdata;
914}
#define DirectFunctionCall1(func, arg1)
Definition: fmgr.h:641
Datum oidout(PG_FUNCTION_ARGS)
Definition: oid.c:47
PyObject * PLy_input_from_tuple(PLyDatumToOb *arg, HeapTuple tuple, TupleDesc desc, bool include_generated)
Definition: plpy_typeio.c:134
PyObject * PLyUnicode_FromString(const char *s)
Definition: plpy_util.c:117
static Datum ObjectIdGetDatum(Oid X)
Definition: postgres.h:257
static char * DatumGetCString(Datum X)
Definition: postgres.h:340
char * SPI_getnspname(Relation rel)
Definition: spi.c:1332
char * SPI_getrelname(Relation rel)
Definition: spi.c:1326
Oid rd_id
Definition: rel.h:113
HeapTuple tg_newtuple
Definition: trigger.h:37
Trigger * tg_trigger
Definition: trigger.h:38
HeapTuple tg_trigtuple
Definition: trigger.h:36
char * tgname
Definition: reltrigger.h:27
int16 tgnargs
Definition: reltrigger.h:38
char ** tgargs
Definition: reltrigger.h:41
#define TRIGGER_FIRED_FOR_STATEMENT(event)
Definition: trigger.h:125
#define TRIGGER_FIRED_BY_DELETE(event)
Definition: trigger.h:113
#define TRIGGER_FIRED_BEFORE(event)
Definition: trigger.h:128
#define TRIGGER_FIRED_FOR_ROW(event)
Definition: trigger.h:122
#define TRIGGER_FIRED_AFTER(event)
Definition: trigger.h:131
#define TRIGGER_FIRED_BY_TRUNCATE(event)
Definition: trigger.h:119
#define TRIGGER_FIRED_INSTEAD(event)
Definition: trigger.h:134

References Assert, FunctionCallInfoBaseData::context, DatumGetCString(), DirectFunctionCall1, elog, ERROR, i, ObjectIdGetDatum(), oidout(), pfree(), PG_CATCH, PG_END_TRY, PG_RE_THROW, PG_TRY, PLy_input_from_tuple(), PLyUnicode_FromString(), RelationData::rd_id, RelationGetDescr, PLyProcedure::result_in, SPI_getnspname(), SPI_getrelname(), TriggerData::tg_event, TriggerData::tg_newtuple, TriggerData::tg_relation, TriggerData::tg_trigger, TriggerData::tg_trigtuple, Trigger::tgargs, Trigger::tgname, Trigger::tgnargs, TRIGGER_FIRED_AFTER, TRIGGER_FIRED_BEFORE, TRIGGER_FIRED_BY_DELETE, TRIGGER_FIRED_BY_INSERT, TRIGGER_FIRED_BY_TRUNCATE, TRIGGER_FIRED_BY_UPDATE, TRIGGER_FIRED_FOR_ROW, TRIGGER_FIRED_FOR_STATEMENT, and TRIGGER_FIRED_INSTEAD.

Referenced by PLy_exec_trigger().