{{ message }}
forked from oracle/python-cx_Oracle
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathVariable.c
More file actions
981 lines (866 loc) · 33.4 KB
/
Copy pathVariable.c
File metadata and controls
981 lines (866 loc) · 33.4 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
//-----------------------------------------------------------------------------
// Copyright 2016, 2017, Oracle and/or its affiliates. All rights reserved.
//
// Portions Copyright 2007-2015, Anthony Tuininga. All rights reserved.
//
// Portions Copyright 2001-2007, Computronix (Canada) Ltd., Edmonton, Alberta,
// Canada. All rights reserved.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Variable.c
// Defines Python types for Oracle variables.
//-----------------------------------------------------------------------------
#include "ObjectType.c"
//-----------------------------------------------------------------------------
// define structure common to all variables
//-----------------------------------------------------------------------------
typedef struct {
PyObject_HEAD
dpiVar *handle;
dpiData *data;
udt_Connection *connection;
PyObject *inConverter;
PyObject *outConverter;
udt_ObjectType *objectType;
uint32_t allocatedElements;
uint32_t size;
uint32_t bufferSize;
int isArray;
struct _udt_VariableType *type;
} udt_Variable;
//-----------------------------------------------------------------------------
// define function types for the common actions that take place on a variable
//-----------------------------------------------------------------------------
typedef int (*SetValueProc)(udt_Variable*, uint32_t, dpiData*, PyObject*);
typedef PyObject * (*GetValueProc)(udt_Variable*, dpiData*);
//-----------------------------------------------------------------------------
// define structure for the common actions that take place on a variable
//-----------------------------------------------------------------------------
typedef struct _udt_VariableType {
SetValueProc setValueProc;
GetValueProc getValueProc;
PyTypeObject *pythonType;
dpiOracleTypeNum oracleTypeNum;
dpiNativeTypeNum nativeTypeNum;
uint32_t size;
} udt_VariableType;
//-----------------------------------------------------------------------------
// Declaration of common variable functions.
//-----------------------------------------------------------------------------
static void Variable_Free(udt_Variable *);
static int Variable_SetValueBytes(udt_Variable *, uint32_t, dpiData *,
PyObject *);
static PyObject *Variable_Repr(udt_Variable *);
static PyObject *Variable_ExternalCopy(udt_Variable *, PyObject *);
static PyObject *Variable_ExternalSetValue(udt_Variable *, PyObject *);
static PyObject *Variable_ExternalGetValue(udt_Variable *, PyObject *,
PyObject *);
static PyObject *Variable_ExternalGetActualElements(udt_Variable*, void*);
static PyObject *Variable_ExternalGetValues(udt_Variable*, void*);
//-----------------------------------------------------------------------------
// declaration of members for variables
//-----------------------------------------------------------------------------
static PyMemberDef g_VariableMembers[] = {
{ "bufferSize", T_INT, offsetof(udt_Variable, bufferSize), READONLY },
{ "inconverter", T_OBJECT, offsetof(udt_Variable, inConverter), 0 },
{ "numElements", T_INT, offsetof(udt_Variable, allocatedElements),
READONLY },
{ "outconverter", T_OBJECT, offsetof(udt_Variable, outConverter), 0 },
{ "size", T_INT, offsetof(udt_Variable, size), READONLY },
{ "type", T_OBJECT, offsetof(udt_Variable, objectType), READONLY },
{ NULL }
};
//-----------------------------------------------------------------------------
// declaration of calculated members for variables
//-----------------------------------------------------------------------------
static PyGetSetDef g_VariableCalcMembers[] = {
{ "actualElements", (getter) Variable_ExternalGetActualElements, 0, 0, 0 },
{ "values", (getter) Variable_ExternalGetValues, 0, 0, 0 },
{ NULL }
};
//-----------------------------------------------------------------------------
// declaration of methods for variables
//-----------------------------------------------------------------------------
static PyMethodDef g_VariableMethods[] = {
{ "copy", (PyCFunction) Variable_ExternalCopy, METH_VARARGS },
{ "setvalue", (PyCFunction) Variable_ExternalSetValue, METH_VARARGS },
{ "getvalue", (PyCFunction) Variable_ExternalGetValue,
METH_VARARGS | METH_KEYWORDS },
{ NULL }
};
#include "BooleanVar.c"
#include "StringVar.c"
#include "LongVar.c"
#include "NumberVar.c"
#include "DateTimeVar.c"
#include "LobVar.c"
#include "CursorVar.c"
#include "ObjectVar.c"
#include "IntervalVar.c"
//-----------------------------------------------------------------------------
// VarType_FromDataTypeInfo()
// Return a variable type given query metadata, or NULL indicating that the
// data indicated by the query metadata is not supported.
//-----------------------------------------------------------------------------
static udt_VariableType *VarType_FromDataTypeInfo(dpiDataTypeInfo *info)
{
char message[120];
switch (info->oracleTypeNum) {
case DPI_ORACLE_TYPE_VARCHAR:
return &vt_String;
case DPI_ORACLE_TYPE_NVARCHAR:
return &vt_NationalCharString;
case DPI_ORACLE_TYPE_CHAR:
return &vt_FixedChar;
case DPI_ORACLE_TYPE_NCHAR:
return &vt_FixedNationalChar;
case DPI_ORACLE_TYPE_ROWID:
return &vt_Rowid;
case DPI_ORACLE_TYPE_RAW:
return &vt_Binary;
case DPI_ORACLE_TYPE_NATIVE_FLOAT:
case DPI_ORACLE_TYPE_NATIVE_DOUBLE:
return &vt_NativeFloat;
case DPI_ORACLE_TYPE_NUMBER:
if (info->scale == 0 ||
(info->scale == -127 && info->precision == 0)) {
if (info->precision > 0 &&
info->precision <= DPI_MAX_INT64_PRECISION)
return &vt_NumberAsInteger;
return &vt_NumberAsLongInteger;
}
return &vt_NumberAsFloat;
case DPI_ORACLE_TYPE_NATIVE_INT:
return &vt_NativeInteger;
case DPI_ORACLE_TYPE_DATE:
return &vt_DateTime;
case DPI_ORACLE_TYPE_TIMESTAMP:
return &vt_Timestamp;
case DPI_ORACLE_TYPE_TIMESTAMP_TZ:
case DPI_ORACLE_TYPE_TIMESTAMP_LTZ:
return &vt_TimestampLTZ;
case DPI_ORACLE_TYPE_INTERVAL_DS:
return &vt_Interval;
case DPI_ORACLE_TYPE_CLOB:
return &vt_CLOB;
case DPI_ORACLE_TYPE_NCLOB:
return &vt_NCLOB;
case DPI_ORACLE_TYPE_BLOB:
return &vt_BLOB;
case DPI_ORACLE_TYPE_BFILE:
return &vt_BFILE;
case DPI_ORACLE_TYPE_STMT:
return &vt_Cursor;
case DPI_ORACLE_TYPE_OBJECT:
return &vt_Object;
case DPI_ORACLE_TYPE_LONG_VARCHAR:
return &vt_LongString;
case DPI_ORACLE_TYPE_LONG_RAW:
return &vt_LongBinary;
default:
sprintf(message, "Oracle type %d not supported.",
info->oracleTypeNum);
PyErr_SetString(g_NotSupportedErrorException, message);
return NULL;
}
}
//-----------------------------------------------------------------------------
// Variable_New()
// Allocate a new variable.
//-----------------------------------------------------------------------------
static udt_Variable *Variable_New(udt_Cursor *cursor, uint32_t numElements,
udt_VariableType *type, uint32_t size, int isArray,
udt_ObjectType *objType)
{
dpiObjectType *typeHandle = NULL;
udt_Variable *self;
// attempt to allocate the object
self = (udt_Variable*) type->pythonType->tp_alloc(type->pythonType, 0);
if (!self)
return NULL;
// perform basic initialization
Py_INCREF(cursor->connection);
self->connection = cursor->connection;
if (objType) {
Py_INCREF(objType);
self->objectType = objType;
typeHandle = objType->handle;
}
if (numElements == 0)
numElements = 1;
self->allocatedElements = numElements;
self->type = type;
self->size = (size == 0) ? type->size : size;
self->isArray = isArray;
// acquire and initialize DPI variable
if (dpiConn_newVar(cursor->connection->handle, type->oracleTypeNum,
type->nativeTypeNum, numElements, self->size, 0, isArray,
typeHandle, &self->handle, &self->data) < 0) {
Error_RaiseAndReturnNull();
Py_DECREF(self);
return NULL;
}
// get buffer size for information
if (dpiVar_getSizeInBytes(self->handle, &self->bufferSize) < 0) {
Error_RaiseAndReturnNull();
Py_DECREF(self);
return NULL;
}
return self;
}
//-----------------------------------------------------------------------------
// Variable_Free()
// Free an existing variable.
//-----------------------------------------------------------------------------
static void Variable_Free(udt_Variable *self)
{
if (self->handle) {
Py_BEGIN_ALLOW_THREADS
dpiVar_release(self->handle);
Py_END_ALLOW_THREADS
self->handle = NULL;
}
Py_CLEAR(self->connection);
Py_CLEAR(self->inConverter);
Py_CLEAR(self->outConverter);
Py_CLEAR(self->objectType);
Py_TYPE(self)->tp_free((PyObject*) self);
}
//-----------------------------------------------------------------------------
// Variable_SetValueBytes()
// Transfer the value to DPI as bytes. The Python value is transformed into
// an object from which bytes can be extracted.
//-----------------------------------------------------------------------------
static int Variable_SetValueBytes(udt_Variable *var, uint32_t pos,
dpiData *data, PyObject *value)
{
dpiData *tempVarData, *sourceData;
dpiVar *tempVarHandle;
const char *encoding;
udt_Buffer buffer;
uint32_t i;
int status;
if (var->type == &vt_FixedNationalChar ||
var->type == &vt_NationalCharString)
encoding = var->connection->encodingInfo.nencoding;
else encoding = var->connection->encodingInfo.encoding;
if (cxBuffer_FromObject(&buffer, value, encoding) < 0)
return -1;
if (var->type->size > 0 && buffer.size > var->bufferSize) {
if (dpiConn_newVar(var->connection->handle, var->type->oracleTypeNum,
var->type->nativeTypeNum, var->allocatedElements,
buffer.size, 0, var->isArray, NULL, &tempVarHandle,
&tempVarData) < 0) {
cxBuffer_Clear(&buffer);
return Error_RaiseAndReturnInt();
}
for (i = 0; i < var->allocatedElements; i++) {
sourceData = &var->data[i];
if (i == pos || sourceData->isNull)
continue;
if (dpiVar_setFromBytes(tempVarHandle, i,
sourceData->value.asBytes.ptr,
sourceData->value.asBytes.length) < 0) {
cxBuffer_Clear(&buffer);
dpiVar_release(tempVarHandle);
return Error_RaiseAndReturnInt();
}
}
dpiVar_release(var->handle);
var->handle = tempVarHandle;
var->data = tempVarData;
var->size = buffer.numCharacters;
var->bufferSize = buffer.size;
}
status = dpiVar_setFromBytes(var->handle, pos, buffer.ptr, buffer.size);
cxBuffer_Clear(&buffer);
if (status < 0)
return Error_RaiseAndReturnInt();
return 0;
}
//-----------------------------------------------------------------------------
// Variable_Check()
// Returns a boolean indicating if the object is a variable.
//-----------------------------------------------------------------------------
static int Variable_Check(PyObject *object)
{
PyTypeObject *objectType = Py_TYPE(object);
return (objectType == &g_CursorVarType ||
objectType == &g_DateTimeVarType ||
objectType == &g_BFILEVarType ||
objectType == &g_BLOBVarType ||
objectType == &g_CLOBVarType ||
objectType == &g_LongStringVarType ||
objectType == &g_LongBinaryVarType ||
objectType == &g_NumberVarType ||
objectType == &g_StringVarType ||
objectType == &g_FixedCharVarType ||
objectType == &g_NCLOBVarType ||
objectType == &g_NCharVarType ||
objectType == &g_FixedNCharVarType ||
objectType == &g_RowidVarType ||
objectType == &g_BinaryVarType ||
objectType == &g_TimestampVarType ||
objectType == &g_IntervalVarType ||
objectType == &g_ObjectVarType ||
objectType == &g_BooleanVarType ||
objectType == &g_NativeFloatVarType ||
objectType == &g_NativeIntVarType);
}
//-----------------------------------------------------------------------------
// Variable_TypeByPythonType()
// Return a variable type given a Python type object or NULL if the Python
// type does not have a corresponding variable type.
//-----------------------------------------------------------------------------
static udt_VariableType *Variable_TypeByPythonType(udt_Cursor* cursor,
PyObject* type)
{
if (type == (PyObject*) &g_StringVarType)
return &vt_String;
if (type == (PyObject*) cxString_Type)
return &vt_String;
if (type == (PyObject*) &g_FixedCharVarType)
return &vt_FixedChar;
if (type == (PyObject*) &g_NCharVarType)
return &vt_NationalCharString;
#if PY_MAJOR_VERSION < 3
if (type == (PyObject*) &PyUnicode_Type)
return &vt_NationalCharString;
#endif
if (type == (PyObject*) &g_FixedNCharVarType)
return &vt_FixedNationalChar;
if (type == (PyObject*) &g_NCLOBVarType)
return &vt_NCLOB;
if (type == (PyObject*) &g_RowidVarType)
return &vt_Rowid;
if (type == (PyObject*) &g_BinaryVarType)
return &vt_Binary;
if (type == (PyObject*) &cxBinary_Type)
return &vt_Binary;
if (type == (PyObject*) &g_LongStringVarType)
return &vt_LongString;
if (type == (PyObject*) &g_LongBinaryVarType)
return &vt_LongBinary;
if (type == (PyObject*) &g_BFILEVarType)
return &vt_BFILE;
if (type == (PyObject*) &g_BLOBVarType)
return &vt_BLOB;
if (type == (PyObject*) &g_CLOBVarType)
return &vt_CLOB;
if (type == (PyObject*) &g_NumberVarType)
return &vt_NumberAsFloat;
if (type == (PyObject*) &PyFloat_Type)
return &vt_NumberAsFloat;
#if PY_MAJOR_VERSION < 3
if (type == (PyObject*) &PyInt_Type)
return &vt_NumberAsInteger;
#endif
if (type == (PyObject*) &PyLong_Type)
return &vt_NumberAsLongInteger;
if (type == (PyObject*) g_DecimalType)
return &vt_NumberAsDecimal;
if (type == (PyObject*) &g_BooleanVarType)
return &vt_Boolean;
if (type == (PyObject*) &PyBool_Type)
return &vt_Boolean;
if (type == (PyObject*) &g_DateTimeVarType)
return &vt_DateTime;
if (type == (PyObject*) PyDateTimeAPI->DateType)
return &vt_Date;
if (type == (PyObject*) PyDateTimeAPI->DateTimeType)
return &vt_DateTime;
if (type == (PyObject*) &g_IntervalVarType)
return &vt_Interval;
if (type == (PyObject*) PyDateTimeAPI->DeltaType)
return &vt_Interval;
if (type == (PyObject*) &g_TimestampVarType)
return &vt_Timestamp;
if (type == (PyObject*) &g_CursorVarType)
return &vt_Cursor;
if (type == (PyObject*) &g_NativeFloatVarType)
return &vt_NativeFloat;
if (type == (PyObject*) &g_NativeIntVarType)
return &vt_NativeInteger;
if (type == (PyObject*) &g_ObjectVarType)
return &vt_Object;
if (type == (PyObject*) &g_ObjectType)
return &vt_Object;
PyErr_SetString(g_NotSupportedErrorException,
"Variable_TypeByPythonType(): unhandled data type");
return NULL;
}
//-----------------------------------------------------------------------------
// Variable_TypeByValue()
// Return a variable type given a Python object or NULL if the Python
// object does not have a corresponding variable type.
//-----------------------------------------------------------------------------
static udt_VariableType *Variable_TypeByValue(PyObject* value, uint32_t* size,
uint32_t *numElements)
{
udt_VariableType *varType;
PyObject *elementValue;
char buffer[200];
int i, result;
// handle scalars
if (value == Py_None) {
*size = 1;
return &vt_String;
}
if (cxString_Check(value)) {
*size = (uint32_t) cxString_GetSize(value);
if (*size == 0)
*size = 1;
return &vt_String;
}
if (PyBool_Check(value)) {
if (g_OracleClientVersionInfo.versionNum < 12)
return &vt_NumberAsInteger;
return &vt_Boolean;
}
#if PY_MAJOR_VERSION < 3
if (PyUnicode_Check(value)) {
*size = (uint32_t) PyUnicode_GET_SIZE(value);
if (*size == 0)
*size = 1;
return &vt_NationalCharString;
}
if (PyInt_Check(value))
return &vt_NumberAsInteger;
#else
if (PyBytes_Check(value)) {
*size = (uint32_t) PyBytes_GET_SIZE(value);
return &vt_Binary;
}
#endif
if (PyLong_Check(value))
return &vt_NumberAsLongInteger;
if (PyFloat_Check(value))
return &vt_NumberAsFloat;
if (cxBinary_Check(value)) {
udt_Buffer temp;
if (cxBuffer_FromObject(&temp, value, NULL) < 0)
return NULL;
*size = temp.size;
cxBuffer_Clear(&temp);
return &vt_Binary;
}
if (PyDateTime_Check(value))
return &vt_DateTime;
if (PyDate_Check(value))
return &vt_DateTime;
if (PyDelta_Check(value))
return &vt_Interval;
result = PyObject_IsInstance(value, (PyObject*) &g_CursorType);
if (result < 0)
return NULL;
if (result)
return &vt_Cursor;
if (Py_TYPE(value) == g_DecimalType)
return &vt_NumberAsDecimal;
if (Py_TYPE(value) == &g_ObjectType)
return &vt_Object;
// handle arrays
if (PyList_Check(value)) {
elementValue = Py_None;
for (i = 0; i < PyList_GET_SIZE(value); i++) {
elementValue = PyList_GET_ITEM(value, i);
if (elementValue != Py_None)
break;
}
varType = Variable_TypeByValue(elementValue, size, numElements);
if (!varType)
return NULL;
*numElements = (uint32_t) PyList_GET_SIZE(value);
*size = varType->size;
return varType;
}
sprintf(buffer, "Variable_TypeByValue(): unhandled data type %.*s", 150,
Py_TYPE(value)->tp_name);
PyErr_SetString(g_NotSupportedErrorException, buffer);
return NULL;
}
//-----------------------------------------------------------------------------
// Variable_DefaultNewByValue()
// Default method for determining the type of variable to use for the data.
//-----------------------------------------------------------------------------
static udt_Variable *Variable_DefaultNewByValue(udt_Cursor *cursor,
PyObject *value, uint32_t numElements)
{
udt_ObjectType *objType = NULL;
udt_VariableType *varType;
uint32_t size = 0;
udt_Object *obj;
varType = Variable_TypeByValue(value, &size, &numElements);
if (!varType)
return NULL;
if (varType == &vt_Object) {
obj = (udt_Object*) value;
objType = obj->objectType;
}
return Variable_New(cursor, numElements, varType, size,
PyList_Check(value), objType);
}
//-----------------------------------------------------------------------------
// Variable_NewByInputTypeHandler()
// Allocate a new variable by looking at the type of the data.
//-----------------------------------------------------------------------------
static udt_Variable *Variable_NewByInputTypeHandler(udt_Cursor *cursor,
PyObject *inputTypeHandler, PyObject *value, uint32_t numElements)
{
PyObject *var;
var = PyObject_CallFunction(inputTypeHandler, "OOi", cursor, value,
numElements);
if (!var)
return NULL;
if (var != Py_None) {
if (!Variable_Check(var)) {
Py_DECREF(var);
PyErr_SetString(PyExc_TypeError,
"expecting variable from input type handler");
return NULL;
}
return (udt_Variable*) var;
}
Py_DECREF(var);
return Variable_DefaultNewByValue(cursor, value, numElements);
}
//-----------------------------------------------------------------------------
// Variable_NewByValue()
// Allocate a new variable by looking at the type of the data.
//-----------------------------------------------------------------------------
static udt_Variable *Variable_NewByValue(udt_Cursor *cursor, PyObject *value,
uint32_t numElements)
{
if (cursor->inputTypeHandler && cursor->inputTypeHandler != Py_None)
return Variable_NewByInputTypeHandler(cursor, cursor->inputTypeHandler,
value, numElements);
if (cursor->connection->inputTypeHandler &&
cursor->connection->inputTypeHandler != Py_None)
return Variable_NewByInputTypeHandler(cursor,
cursor->connection->inputTypeHandler, value, numElements);
return Variable_DefaultNewByValue(cursor, value, numElements);
}
//-----------------------------------------------------------------------------
// Variable_NewArrayByType()
// Allocate a new PL/SQL array by looking at the Python data type.
//-----------------------------------------------------------------------------
static udt_Variable *Variable_NewArrayByType(udt_Cursor *cursor,
PyObject *value)
{
PyObject *typeObj, *numElementsObj;
udt_VariableType *varType;
uint32_t numElements;
if (PyList_GET_SIZE(value) != 2) {
PyErr_SetString(g_ProgrammingErrorException,
"expecting an array of two elements [type, numelems]");
return NULL;
}
typeObj = PyList_GET_ITEM(value, 0);
numElementsObj = PyList_GET_ITEM(value, 1);
if (!PyInt_Check(numElementsObj)) {
PyErr_SetString(g_ProgrammingErrorException,
"number of elements must be an integer");
return NULL;
}
varType = Variable_TypeByPythonType(cursor, typeObj);
if (!varType)
return NULL;
numElements = PyInt_AsLong(numElementsObj);
if (PyErr_Occurred())
return NULL;
return Variable_New(cursor, numElements, varType, varType->size, 1, NULL);
}
//-----------------------------------------------------------------------------
// Variable_NewByType()
// Allocate a new variable by looking at the Python data type.
//-----------------------------------------------------------------------------
static udt_Variable *Variable_NewByType(udt_Cursor *cursor, PyObject *value,
uint32_t numElements)
{
udt_VariableType *varType;
int size;
// passing an integer is assumed to be a string
if (PyInt_Check(value)) {
size = PyInt_AsLong(value);
if (PyErr_Occurred())
return NULL;
varType = &vt_String;
return Variable_New(cursor, numElements, varType, size, 0, NULL);
}
// passing an array of two elements to define an array
if (PyList_Check(value))
return Variable_NewArrayByType(cursor, value);
// handle directly bound variables
if (Variable_Check(value)) {
Py_INCREF(value);
return (udt_Variable*) value;
}
// everything else ought to be a Python type
varType = Variable_TypeByPythonType(cursor, value);
if (!varType)
return NULL;
return Variable_New(cursor, numElements, varType, varType->size, 0, NULL);
}
//-----------------------------------------------------------------------------
// Variable_Bind()
// Allocate a variable and bind it to the given statement.
//-----------------------------------------------------------------------------
static int Variable_Bind(udt_Variable *var, udt_Cursor *cursor, PyObject *name,
uint32_t pos)
{
udt_Buffer nameBuffer;
int status;
// perform the bind
if (name) {
if (cxBuffer_FromObject(&nameBuffer, name,
cursor->connection->encodingInfo.encoding) < 0)
return -1;
status = dpiStmt_bindByName(cursor->handle, (char*) nameBuffer.ptr,
nameBuffer.size, var->handle);
cxBuffer_Clear(&nameBuffer);
} else {
status = dpiStmt_bindByPos(cursor->handle, pos, var->handle);
}
if (status < 0)
return Error_RaiseAndReturnInt();
return 0;
}
//-----------------------------------------------------------------------------
// Variable_GetSingleValue()
// Return the value of the variable at the given position.
//-----------------------------------------------------------------------------
static PyObject *Variable_GetSingleValue(udt_Variable *var, uint32_t arrayPos)
{
PyObject *value, *result;
dpiData *data;
// ensure we do not exceed the number of allocated elements
if (arrayPos >= var->allocatedElements) {
PyErr_SetString(PyExc_IndexError,
"Variable_GetSingleValue: array size exceeded");
return NULL;
}
// return the value
data = &var->data[arrayPos];
if (data->isNull)
Py_RETURN_NONE;
value = (*var->type->getValueProc)(var, data);
if (value && var->outConverter && var->outConverter != Py_None) {
result = PyObject_CallFunctionObjArgs(var->outConverter, value, NULL);
Py_DECREF(value);
return result;
}
return value;
}
//-----------------------------------------------------------------------------
// Variable_GetArrayValue()
// Return the value of the variable as an array.
//-----------------------------------------------------------------------------
static PyObject *Variable_GetArrayValue(udt_Variable *var,
uint32_t numElements)
{
PyObject *value, *singleValue;
uint32_t i;
value = PyList_New(numElements);
if (!value)
return NULL;
for (i = 0; i < numElements; i++) {
singleValue = Variable_GetSingleValue(var, i);
if (!singleValue) {
Py_DECREF(value);
return NULL;
}
PyList_SET_ITEM(value, i, singleValue);
}
return value;
}
//-----------------------------------------------------------------------------
// Variable_GetValue()
// Return the value of the variable.
//-----------------------------------------------------------------------------
static PyObject *Variable_GetValue(udt_Variable *var, uint32_t arrayPos)
{
uint32_t numElements;
if (var->isArray) {
if (dpiVar_getNumElementsInArray(var->handle, &numElements) < 0)
return Error_RaiseAndReturnNull();
return Variable_GetArrayValue(var, numElements);
}
return Variable_GetSingleValue(var, arrayPos);
}
//-----------------------------------------------------------------------------
// Variable_SetSingleValue()
// Set a single value in the variable.
//-----------------------------------------------------------------------------
static int Variable_SetSingleValue(udt_Variable *var, uint32_t arrayPos,
PyObject *value)
{
PyObject *convertedValue = NULL;
int result = 0;
dpiData *data;
// convert value, if necessary
if (var->inConverter && var->inConverter != Py_None) {
convertedValue = PyObject_CallFunctionObjArgs(var->inConverter, value,
NULL);
if (!convertedValue)
return -1;
value = convertedValue;
}
// set up for transformation from Python to value expected by DPI
data = &var->data[arrayPos];
data->isNull = (value == Py_None);
if (!data->isNull)
result = (*var->type->setValueProc)(var, arrayPos, data, value);
Py_XDECREF(convertedValue);
return result;
}
//-----------------------------------------------------------------------------
// Variable_SetArrayValue()
// Set all of the array values for the variable.
//-----------------------------------------------------------------------------
static int Variable_SetArrayValue(udt_Variable *var, PyObject *value)
{
uint32_t numElements, i;
// ensure we have an array to set
if (!PyList_Check(value)) {
PyErr_SetString(PyExc_TypeError, "expecting array data");
return -1;
}
// set the number of actual elements
numElements = (uint32_t) PyList_GET_SIZE(value);
if (dpiVar_setNumElementsInArray(var->handle, numElements) < 0)
return Error_RaiseAndReturnInt();
// set all of the values
for (i = 0; i < numElements; i++) {
if (Variable_SetSingleValue(var, i, PyList_GET_ITEM(value, i)) < 0)
return -1;
}
return 0;
}
//-----------------------------------------------------------------------------
// Variable_SetValue()
// Set the value of the variable.
//-----------------------------------------------------------------------------
static int Variable_SetValue(udt_Variable *var, uint32_t arrayPos,
PyObject *value)
{
if (var->isArray) {
if (arrayPos > 0) {
PyErr_SetString(g_NotSupportedErrorException,
"arrays of arrays are not supported by the OCI");
return -1;
}
return Variable_SetArrayValue(var, value);
}
return Variable_SetSingleValue(var, arrayPos, value);
}
//-----------------------------------------------------------------------------
// Variable_ExternalCopy()
// Copy the contents of the source variable to the destination variable.
//-----------------------------------------------------------------------------
static PyObject *Variable_ExternalCopy(udt_Variable *targetVar, PyObject *args)
{
uint32_t sourcePos, targetPos;
udt_Variable *sourceVar;
if (!PyArg_ParseTuple(args, "Oii", &sourceVar, &sourcePos, &targetPos))
return NULL;
if (Py_TYPE(targetVar) != Py_TYPE(sourceVar)) {
PyErr_SetString(g_ProgrammingErrorException,
"source and target variable type must match");
return NULL;
}
if (dpiVar_copyData(targetVar->handle, targetPos, sourceVar->handle,
sourcePos) < 0)
return Error_RaiseAndReturnNull();
Py_RETURN_NONE;
}
//-----------------------------------------------------------------------------
// Variable_ExternalSetValue()
// Set the value of the variable at the given position.
//-----------------------------------------------------------------------------
static PyObject *Variable_ExternalSetValue(udt_Variable *var, PyObject *args)
{
PyObject *value;
uint32_t pos;
if (!PyArg_ParseTuple(args, "iO", &pos, &value))
return NULL;
if (Variable_SetValue(var, pos, value) < 0)
return NULL;
Py_RETURN_NONE;
}
//-----------------------------------------------------------------------------
// Variable_ExternalGetValue()
// Return the value of the variable at the given position.
//-----------------------------------------------------------------------------
static PyObject *Variable_ExternalGetValue(udt_Variable *var, PyObject *args,
PyObject *keywordArgs)
{
static char *keywordList[] = { "pos", NULL };
uint32_t pos = 0;
if (!PyArg_ParseTupleAndKeywords(args, keywordArgs, "|i", keywordList,
&pos))
return NULL;
return Variable_GetValue(var, pos);
}
//-----------------------------------------------------------------------------
// Variable_ExternalGetActualElements()
// Return the values of the variable at all positions as a list.
//-----------------------------------------------------------------------------
static PyObject *Variable_ExternalGetActualElements(udt_Variable *var,
void *unused)
{
uint32_t numElements;
if (dpiVar_getNumElementsInArray(var->handle, &numElements) < 0)
return Error_RaiseAndReturnNull();
return PyInt_FromLong(numElements);
}
//-----------------------------------------------------------------------------
// Variable_ExternalGetValues()
// Return the values of the variable at all positions as a list.
//-----------------------------------------------------------------------------
static PyObject *Variable_ExternalGetValues(udt_Variable *var, void *unused)
{
uint32_t numElements;
if (dpiVar_getNumElementsInArray(var->handle, &numElements) < 0)
return Error_RaiseAndReturnNull();
return Variable_GetArrayValue(var, numElements);
}
//-----------------------------------------------------------------------------
// Variable_Repr()
// Return a string representation of the variable.
//-----------------------------------------------------------------------------
static PyObject *Variable_Repr(udt_Variable *var)
{
PyObject *value, *module, *name, *result, *format, *formatArgs;
uint32_t numElements;
if (var->isArray) {
if (dpiVar_getNumElementsInArray(var->handle, &numElements) < 0)
return Error_RaiseAndReturnNull();
value = Variable_GetArrayValue(var, numElements);
} else if (var->allocatedElements == 1)
value = Variable_GetSingleValue(var, 0);
else value = Variable_GetArrayValue(var, var->allocatedElements);
if (!value)
return NULL;
format = cxString_FromAscii("<%s.%s with value %r>");
if (!format) {
Py_DECREF(value);
return NULL;
}
if (GetModuleAndName(Py_TYPE(var), &module, &name) < 0) {
Py_DECREF(value);
Py_DECREF(format);
return NULL;
}
formatArgs = PyTuple_Pack(3, module, name, value);
Py_DECREF(module);
Py_DECREF(name);
Py_DECREF(value);
if (!formatArgs) {
Py_DECREF(format);
return NULL;
}
result = cxString_Format(format, formatArgs);
Py_DECREF(format);
Py_DECREF(formatArgs);
return result;
}
You can’t perform that action at this time.