{{ message }}
forked from oracle/python-cx_Oracle
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathcxoTransform.c
More file actions
756 lines (718 loc) · 26 KB
/
Copy pathcxoTransform.c
File metadata and controls
756 lines (718 loc) · 26 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
//-----------------------------------------------------------------------------
// Copyright 2018, Oracle and/or its affiliates. All rights reserved.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// cxoTransform.c
// Defines routines used to transform Python objects to database values and
// database values to Python objects.
//-----------------------------------------------------------------------------
#include "cxoModule.h"
#include "datetime.h"
// PyPy compatibility
#ifndef PyDateTime_DELTA_GET_DAYS
#define PyDateTime_DELTA_GET_DAYS(x) ((x)->days)
#endif
#ifndef PyDateTime_DELTA_GET_SECONDS
#define PyDateTime_DELTA_GET_SECONDS(x) ((x)->seconds)
#endif
#ifndef PyDateTime_DELTA_GET_MICROSECONDS
#define PyDateTime_DELTA_GET_MICROSECONDS(x) ((x)->microseconds)
#endif
//-----------------------------------------------------------------------------
// Types
//-----------------------------------------------------------------------------
typedef struct {
cxoTransformNum transformNum;
dpiOracleTypeNum oracleTypeNum;
dpiNativeTypeNum nativeTypeNum;
} cxoTransform;
//-----------------------------------------------------------------------------
// Globals
//-----------------------------------------------------------------------------
PyTypeObject *cxoPyTypeDate;
PyTypeObject *cxoPyTypeDateTime;
static PyTypeObject *cxoPyTypeDecimal;
static const cxoTransform cxoAllTransforms[] = {
{
CXO_TRANSFORM_NONE,
DPI_ORACLE_TYPE_VARCHAR,
DPI_NATIVE_TYPE_BYTES
},
{
CXO_TRANSFORM_BINARY,
DPI_ORACLE_TYPE_RAW,
DPI_NATIVE_TYPE_BYTES
},
{
CXO_TRANSFORM_BFILE,
DPI_ORACLE_TYPE_BFILE,
DPI_NATIVE_TYPE_LOB
},
{
CXO_TRANSFORM_BLOB,
DPI_ORACLE_TYPE_BLOB,
DPI_NATIVE_TYPE_LOB
},
{
CXO_TRANSFORM_BOOLEAN,
DPI_ORACLE_TYPE_BOOLEAN,
DPI_NATIVE_TYPE_BOOLEAN
},
{
CXO_TRANSFORM_CLOB,
DPI_ORACLE_TYPE_CLOB,
DPI_NATIVE_TYPE_LOB
},
{
CXO_TRANSFORM_CURSOR,
DPI_ORACLE_TYPE_STMT,
DPI_NATIVE_TYPE_STMT
},
{
CXO_TRANSFORM_DATE,
DPI_ORACLE_TYPE_DATE,
DPI_NATIVE_TYPE_TIMESTAMP
},
{
CXO_TRANSFORM_DATETIME,
DPI_ORACLE_TYPE_DATE,
DPI_NATIVE_TYPE_TIMESTAMP
},
{
CXO_TRANSFORM_DECIMAL,
DPI_ORACLE_TYPE_NUMBER,
DPI_NATIVE_TYPE_BYTES
},
{
CXO_TRANSFORM_FIXED_CHAR,
DPI_ORACLE_TYPE_CHAR,
DPI_NATIVE_TYPE_BYTES
},
{
CXO_TRANSFORM_FIXED_NCHAR,
DPI_ORACLE_TYPE_NCHAR,
DPI_NATIVE_TYPE_BYTES
},
{
CXO_TRANSFORM_FLOAT,
DPI_ORACLE_TYPE_NUMBER,
DPI_NATIVE_TYPE_DOUBLE
},
{
CXO_TRANSFORM_INT,
DPI_ORACLE_TYPE_NUMBER,
DPI_NATIVE_TYPE_INT64
},
{
CXO_TRANSFORM_LONG_BINARY,
DPI_ORACLE_TYPE_LONG_RAW,
DPI_NATIVE_TYPE_BYTES
},
{
CXO_TRANSFORM_LONG_INT,
DPI_ORACLE_TYPE_NUMBER,
DPI_NATIVE_TYPE_BYTES
},
{
CXO_TRANSFORM_LONG_STRING,
DPI_ORACLE_TYPE_LONG_VARCHAR,
DPI_NATIVE_TYPE_BYTES
},
{
CXO_TRANSFORM_NATIVE_DOUBLE,
DPI_ORACLE_TYPE_NATIVE_DOUBLE,
DPI_NATIVE_TYPE_DOUBLE
},
{
CXO_TRANSFORM_NATIVE_FLOAT,
DPI_ORACLE_TYPE_NATIVE_FLOAT,
DPI_NATIVE_TYPE_FLOAT
},
{
CXO_TRANSFORM_NATIVE_INT,
DPI_ORACLE_TYPE_NATIVE_INT,
DPI_NATIVE_TYPE_INT64
},
{
CXO_TRANSFORM_NCLOB,
DPI_ORACLE_TYPE_NCLOB,
DPI_NATIVE_TYPE_LOB
},
{
CXO_TRANSFORM_NSTRING,
DPI_ORACLE_TYPE_NVARCHAR,
DPI_NATIVE_TYPE_BYTES
},
{
CXO_TRANSFORM_OBJECT,
DPI_ORACLE_TYPE_OBJECT,
DPI_NATIVE_TYPE_OBJECT
},
{
CXO_TRANSFORM_ROWID,
DPI_ORACLE_TYPE_ROWID,
DPI_NATIVE_TYPE_ROWID
},
{
CXO_TRANSFORM_STRING,
DPI_ORACLE_TYPE_VARCHAR,
DPI_NATIVE_TYPE_BYTES
},
{
CXO_TRANSFORM_TIMEDELTA,
DPI_ORACLE_TYPE_INTERVAL_DS,
DPI_NATIVE_TYPE_INTERVAL_DS
},
{
CXO_TRANSFORM_TIMESTAMP,
DPI_ORACLE_TYPE_TIMESTAMP,
DPI_NATIVE_TYPE_TIMESTAMP
},
{
CXO_TRANSFORM_TIMESTAMP_LTZ,
DPI_ORACLE_TYPE_TIMESTAMP_LTZ,
DPI_NATIVE_TYPE_TIMESTAMP
}
};
//-----------------------------------------------------------------------------
// cxoTransform_dateFromTicks()
// Creates a date from ticks (number of seconds since Unix epoch).
//-----------------------------------------------------------------------------
PyObject *cxoTransform_dateFromTicks(PyObject *args)
{
return PyDate_FromTimestamp(args);
}
//-----------------------------------------------------------------------------
// cxoTransform_fromPython()
// Transforms a Python object into its corresponding database value.
//-----------------------------------------------------------------------------
int cxoTransform_fromPython(cxoTransformNum transformNum, PyObject *pyValue,
dpiDataBuffer *dbValue, cxoBuffer *buffer, const char *encoding,
const char *nencoding, cxoVar *var, uint32_t arrayPos)
{
dpiIntervalDS *interval;
PyDateTime_Delta *delta;
int32_t deltaSeconds;
PyObject *textValue;
cxoObject *obj;
cxoLob *lob;
int status;
switch (transformNum) {
case CXO_TRANSFORM_BOOLEAN:
dbValue->asBoolean = (pyValue == Py_True);
return 0;
case CXO_TRANSFORM_BINARY:
case CXO_TRANSFORM_FIXED_CHAR:
case CXO_TRANSFORM_LONG_BINARY:
case CXO_TRANSFORM_LONG_STRING:
case CXO_TRANSFORM_STRING:
if (cxoBuffer_fromObject(buffer, pyValue, encoding) < 0)
return -1;
dbValue->asBytes.ptr = (char*) buffer->ptr;
dbValue->asBytes.length = buffer->size;
return 0;
case CXO_TRANSFORM_FIXED_NCHAR:
case CXO_TRANSFORM_NSTRING:
if (cxoBuffer_fromObject(buffer, pyValue, nencoding) < 0)
return -1;
dbValue->asBytes.ptr = (char*) buffer->ptr;
dbValue->asBytes.length = buffer->size;
return 0;
case CXO_TRANSFORM_BLOB:
case CXO_TRANSFORM_CLOB:
case CXO_TRANSFORM_NCLOB:
if (Py_TYPE(pyValue) == &cxoPyTypeLob) {
lob = (cxoLob*) pyValue;
if (var) {
if (dpiVar_setFromLob(var->handle, arrayPos,
lob->handle) < 0)
return cxoError_raiseAndReturnInt();
} else dbValue->asLOB = lob->handle;
return 0;
}
if (transformNum == CXO_TRANSFORM_NCLOB)
encoding = nencoding;
if (cxoBuffer_fromObject(buffer, pyValue, encoding) < 0)
return -1;
Py_BEGIN_ALLOW_THREADS
status = dpiLob_setFromBytes(dbValue->asLOB, buffer->ptr,
buffer->size);
Py_END_ALLOW_THREADS
return status;
case CXO_TRANSFORM_INT:
case CXO_TRANSFORM_NATIVE_INT:
#if PY_MAJOR_VERSION < 3
if (PyInt_Check(pyValue)) {
dbValue->asInt64 = PyInt_AS_LONG(pyValue);
return 0;
}
#endif
if (PyBool_Check(pyValue)) {
dbValue->asInt64 = (pyValue == Py_True);
return 0;
}
dbValue->asInt64 = PyLong_AsLong(pyValue);
if (PyErr_Occurred())
return -1;
return 0;
case CXO_TRANSFORM_DECIMAL:
case CXO_TRANSFORM_LONG_INT:
textValue = PyObject_Str(pyValue);
if (!textValue)
return -1;
status = cxoBuffer_fromObject(buffer, textValue, encoding);
Py_DECREF(textValue);
if (status < 0)
return -1;
dbValue->asBytes.ptr = (char*) buffer->ptr;
dbValue->asBytes.length = buffer->size;
return 0;
case CXO_TRANSFORM_FLOAT:
case CXO_TRANSFORM_NATIVE_DOUBLE:
case CXO_TRANSFORM_NATIVE_FLOAT:
if (!PyFloat_Check(pyValue) &&
#if PY_MAJOR_VERSION < 3
!PyInt_Check(pyValue) &&
#endif
!PyLong_Check(pyValue)) {
PyErr_SetString(PyExc_TypeError, "expecting float");
return -1;
}
if (transformNum == CXO_TRANSFORM_NATIVE_FLOAT)
dbValue->asFloat = (float) PyFloat_AsDouble(pyValue);
else dbValue->asDouble = PyFloat_AsDouble(pyValue);
if (PyErr_Occurred())
return -1;
return 0;
case CXO_TRANSFORM_OBJECT:
if (Py_TYPE(pyValue) != &cxoPyTypeObject) {
PyErr_SetString(PyExc_TypeError, "expecting cx_Oracle.Object");
return -1;
}
obj = (cxoObject*) pyValue;
if (var) {
if (dpiVar_setFromObject(var->handle, arrayPos,
obj->handle) < 0)
return cxoError_raiseAndReturnInt();
} else dbValue->asObject = obj->handle;
return 0;
case CXO_TRANSFORM_DATE:
case CXO_TRANSFORM_DATETIME:
case CXO_TRANSFORM_TIMESTAMP:
case CXO_TRANSFORM_TIMESTAMP_LTZ:
if (PyDateTime_Check(pyValue)) {
memset(&dbValue->asTimestamp, 0, sizeof(dbValue->asTimestamp));
dbValue->asTimestamp.year = PyDateTime_GET_YEAR(pyValue);
dbValue->asTimestamp.month = PyDateTime_GET_MONTH(pyValue);
dbValue->asTimestamp.day = PyDateTime_GET_DAY(pyValue);
dbValue->asTimestamp.hour = PyDateTime_DATE_GET_HOUR(pyValue);
dbValue->asTimestamp.minute =
PyDateTime_DATE_GET_MINUTE(pyValue);
dbValue->asTimestamp.second =
PyDateTime_DATE_GET_SECOND(pyValue);
dbValue->asTimestamp.fsecond =
PyDateTime_DATE_GET_MICROSECOND(pyValue) * 1000;
} else if (PyDate_Check(pyValue)) {
memset(&dbValue->asTimestamp, 0, sizeof(dbValue->asTimestamp));
dbValue->asTimestamp.year = PyDateTime_GET_YEAR(pyValue);
dbValue->asTimestamp.month = PyDateTime_GET_MONTH(pyValue);
dbValue->asTimestamp.day = PyDateTime_GET_DAY(pyValue);
} else {
PyErr_SetString(PyExc_TypeError, "expecting date or datetime");
return -1;
}
return 0;
case CXO_TRANSFORM_TIMEDELTA:
if (!PyDelta_Check(pyValue)) {
PyErr_SetString(PyExc_TypeError, "expecting timedelta");
return -1;
}
delta = (PyDateTime_Delta*) pyValue;
interval = &dbValue->asIntervalDS;
deltaSeconds = PyDateTime_DELTA_GET_SECONDS(delta);
interval->days = PyDateTime_DELTA_GET_DAYS(delta);
interval->hours = deltaSeconds / 3600;
interval->seconds = deltaSeconds % 3600;
interval->minutes = interval->seconds / 60;
interval->seconds = interval->seconds % 60;
interval->fseconds =
PyDateTime_DELTA_GET_MICROSECONDS(delta) * 1000;
return 0;
default:
break;
}
PyErr_SetString(cxoNotSupportedErrorException,
"Python value cannot be converted to a database value");
return -1;
}
//-----------------------------------------------------------------------------
// cxoTransform_getNumFromDataTypeInfo()
// Get the default transformation to use for the specified data type.
//-----------------------------------------------------------------------------
cxoTransformNum cxoTransform_getNumFromDataTypeInfo(dpiDataTypeInfo *info)
{
#if PY_MAJOR_VERSION < 3
static int maxLongSafeDigits = sizeof(long) >= 8 ? 18 : 9;
#endif
switch (info->oracleTypeNum) {
case DPI_ORACLE_TYPE_VARCHAR:
return CXO_TRANSFORM_STRING;
case DPI_ORACLE_TYPE_NVARCHAR:
return CXO_TRANSFORM_NSTRING;
case DPI_ORACLE_TYPE_CHAR:
return CXO_TRANSFORM_FIXED_CHAR;
case DPI_ORACLE_TYPE_NCHAR:
return CXO_TRANSFORM_FIXED_NCHAR;
case DPI_ORACLE_TYPE_ROWID:
return CXO_TRANSFORM_ROWID;
case DPI_ORACLE_TYPE_RAW:
return CXO_TRANSFORM_BINARY;
case DPI_ORACLE_TYPE_NATIVE_DOUBLE:
return CXO_TRANSFORM_NATIVE_DOUBLE;
case DPI_ORACLE_TYPE_NATIVE_FLOAT:
return CXO_TRANSFORM_NATIVE_FLOAT;
case DPI_ORACLE_TYPE_NUMBER:
if (info->scale == 0 ||
(info->scale == -127 && info->precision == 0)) {
#if PY_MAJOR_VERSION < 3
if (info->precision > 0 &&
info->precision <= maxLongSafeDigits)
return CXO_TRANSFORM_INT;
#endif
return CXO_TRANSFORM_LONG_INT;
}
return CXO_TRANSFORM_FLOAT;
case DPI_ORACLE_TYPE_NATIVE_INT:
return CXO_TRANSFORM_NATIVE_INT;
case DPI_ORACLE_TYPE_DATE:
return CXO_TRANSFORM_DATETIME;
case DPI_ORACLE_TYPE_TIMESTAMP:
return CXO_TRANSFORM_TIMESTAMP;
case DPI_ORACLE_TYPE_TIMESTAMP_TZ:
case DPI_ORACLE_TYPE_TIMESTAMP_LTZ:
return CXO_TRANSFORM_TIMESTAMP_LTZ;
case DPI_ORACLE_TYPE_INTERVAL_DS:
return CXO_TRANSFORM_TIMEDELTA;
case DPI_ORACLE_TYPE_CLOB:
return CXO_TRANSFORM_CLOB;
case DPI_ORACLE_TYPE_NCLOB:
return CXO_TRANSFORM_NCLOB;
case DPI_ORACLE_TYPE_BLOB:
return CXO_TRANSFORM_BLOB;
case DPI_ORACLE_TYPE_BFILE:
return CXO_TRANSFORM_BFILE;
case DPI_ORACLE_TYPE_STMT:
return CXO_TRANSFORM_CURSOR;
case DPI_ORACLE_TYPE_OBJECT:
return CXO_TRANSFORM_OBJECT;
case DPI_ORACLE_TYPE_LONG_VARCHAR:
return CXO_TRANSFORM_LONG_STRING;
case DPI_ORACLE_TYPE_LONG_RAW:
return CXO_TRANSFORM_LONG_BINARY;
case DPI_ORACLE_TYPE_BOOLEAN:
return CXO_TRANSFORM_BOOLEAN;
default:
break;
}
return CXO_TRANSFORM_UNSUPPORTED;
}
//-----------------------------------------------------------------------------
// cxoTransform_getNumFromType()
// Get the appropriate transformation to use for the specified Python type.
//-----------------------------------------------------------------------------
cxoTransformNum cxoTransform_getNumFromType(PyTypeObject *type)
{
if (type == &cxoPyTypeString)
return CXO_TRANSFORM_STRING;
if (type == &cxoPyTypeStringVar)
return CXO_TRANSFORM_STRING;
if (type == &cxoPyTypeFixedCharVar)
return CXO_TRANSFORM_FIXED_CHAR;
if (type == &cxoPyTypeNcharVar)
return CXO_TRANSFORM_NSTRING;
if (type == &cxoPyTypeFixedNcharVar)
return CXO_TRANSFORM_FIXED_NCHAR;
if (type == &cxoPyTypeRowidVar)
return CXO_TRANSFORM_ROWID;
#if PY_MAJOR_VERSION < 3
if (type == &PyUnicode_Type)
return CXO_TRANSFORM_NSTRING;
if (type == &PyInt_Type)
return CXO_TRANSFORM_INT;
#endif
if (type == &cxoPyTypeBinary)
return CXO_TRANSFORM_BINARY;
if (type == &cxoPyTypeBinaryVar)
return CXO_TRANSFORM_BINARY;
if (type == &PyFloat_Type)
return CXO_TRANSFORM_FLOAT;
if (type == &PyLong_Type)
return CXO_TRANSFORM_LONG_INT;
if (type == cxoPyTypeDecimal)
return CXO_TRANSFORM_DECIMAL;
if (type == &cxoPyTypeNumberVar)
return CXO_TRANSFORM_FLOAT;
if (type == &cxoPyTypeNativeFloatVar)
return CXO_TRANSFORM_NATIVE_DOUBLE;
if (type == &cxoPyTypeNativeIntVar)
return CXO_TRANSFORM_NATIVE_INT;
if (type == &PyBool_Type)
return CXO_TRANSFORM_BOOLEAN;
if (type == &cxoPyTypeBooleanVar)
return CXO_TRANSFORM_BOOLEAN;
if (type == PyDateTimeAPI->DateType)
return CXO_TRANSFORM_DATE;
if (type == PyDateTimeAPI->DateTimeType)
return CXO_TRANSFORM_DATETIME;
if (type == &cxoPyTypeDateTimeVar)
return CXO_TRANSFORM_DATETIME;
if (type == &cxoPyTypeTimestampVar)
return CXO_TRANSFORM_TIMESTAMP;
if (type == PyDateTimeAPI->DeltaType)
return CXO_TRANSFORM_TIMEDELTA;
if (type == &cxoPyTypeIntervalVar)
return CXO_TRANSFORM_TIMEDELTA;
if (type == &cxoPyTypeObject)
return CXO_TRANSFORM_OBJECT;
if (type == &cxoPyTypeObjectVar)
return CXO_TRANSFORM_OBJECT;
if (type == &cxoPyTypeClobVar)
return CXO_TRANSFORM_CLOB;
if (type == &cxoPyTypeNclobVar)
return CXO_TRANSFORM_NCLOB;
if (type == &cxoPyTypeBlobVar)
return CXO_TRANSFORM_BLOB;
if (type == &cxoPyTypeBfileVar)
return CXO_TRANSFORM_BFILE;
if (type == &cxoPyTypeCursorVar)
return CXO_TRANSFORM_CURSOR;
if (type == &cxoPyTypeLongStringVar)
return CXO_TRANSFORM_LONG_STRING;
if (type == &cxoPyTypeLongBinaryVar)
return CXO_TRANSFORM_LONG_BINARY;
return CXO_TRANSFORM_UNSUPPORTED;
}
//-----------------------------------------------------------------------------
// cxoTransform_getNumFromValue()
// Get the appropriate transformation to use for the specified Python object.
//-----------------------------------------------------------------------------
cxoTransformNum cxoTransform_getNumFromValue(PyObject *value)
{
cxoLob *lob;
if (value == Py_None)
return CXO_TRANSFORM_NONE;
if (PyBool_Check(value)) {
if (cxoClientVersionInfo.versionNum < 12)
return CXO_TRANSFORM_NATIVE_INT;
return CXO_TRANSFORM_BOOLEAN;
}
#if PY_MAJOR_VERSION >= 3
if (PyUnicode_Check(value))
return CXO_TRANSFORM_STRING;
if (PyBytes_Check(value))
return CXO_TRANSFORM_BINARY;
#else
if (PyUnicode_Check(value))
return CXO_TRANSFORM_NSTRING;
if (PyString_Check(value))
return CXO_TRANSFORM_STRING;
if (PyBuffer_Check(value))
return CXO_TRANSFORM_BINARY;
if (PyInt_Check(value))
return CXO_TRANSFORM_INT;
#endif
if (PyLong_Check(value))
return CXO_TRANSFORM_LONG_INT;
if (PyFloat_Check(value))
return CXO_TRANSFORM_FLOAT;
if (PyDateTime_Check(value))
return CXO_TRANSFORM_DATETIME;
if (PyDate_Check(value))
return CXO_TRANSFORM_DATE;
if (PyDelta_Check(value))
return CXO_TRANSFORM_TIMEDELTA;
if (PyObject_TypeCheck(value, &cxoPyTypeCursor))
return CXO_TRANSFORM_CURSOR;
if (PyObject_TypeCheck(value, cxoPyTypeDecimal))
return CXO_TRANSFORM_DECIMAL;
if (PyObject_TypeCheck(value, &cxoPyTypeObject))
return CXO_TRANSFORM_OBJECT;
if (PyObject_TypeCheck(value, &cxoPyTypeLob)) {
lob = (cxoLob*) value;
if (lob->oracleTypeNum == DPI_ORACLE_TYPE_CLOB)
return CXO_TRANSFORM_CLOB;
if (lob->oracleTypeNum == DPI_ORACLE_TYPE_NCLOB)
return CXO_TRANSFORM_NCLOB;
if (lob->oracleTypeNum == DPI_ORACLE_TYPE_BLOB)
return CXO_TRANSFORM_BLOB;
if (lob->oracleTypeNum == DPI_ORACLE_TYPE_BFILE)
return CXO_TRANSFORM_BFILE;
}
return CXO_TRANSFORM_UNSUPPORTED;
}
//-----------------------------------------------------------------------------
// cxoTransform_getTypeInfo()
// Get type information for the specified transform. The transform number is
// assumed to be a valid value at this point (not CXO_TRANSFORM_UNSUPPORTED).
//-----------------------------------------------------------------------------
void cxoTransform_getTypeInfo(cxoTransformNum transformNum,
dpiOracleTypeNum *oracleTypeNum, dpiNativeTypeNum *nativeTypeNum)
{
const cxoTransform *transform;
transform = &cxoAllTransforms[transformNum];
*oracleTypeNum = transform->oracleTypeNum;
*nativeTypeNum = transform->nativeTypeNum;
}
//-----------------------------------------------------------------------------
// cxoTransform_init()
// Import the necessary modules for performing transformations.
//-----------------------------------------------------------------------------
int cxoTransform_init(void)
{
PyObject *module;
// import the datetime module for datetime support
PyDateTime_IMPORT;
if (PyErr_Occurred())
return -1;
cxoPyTypeDate = PyDateTimeAPI->DateType;
cxoPyTypeDateTime = PyDateTimeAPI->DateTimeType;
// import the decimal module for decimal support
module = PyImport_ImportModule("decimal");
if (!module)
return -1;
cxoPyTypeDecimal =
(PyTypeObject*) PyObject_GetAttrString(module, "Decimal");
Py_DECREF(module);
if (!cxoPyTypeDecimal)
return -1;
return 0;
}
//-----------------------------------------------------------------------------
// cxoTransform_timestampFromTicks()
// Creates a timestamp from ticks (number of seconds since Unix epoch).
//-----------------------------------------------------------------------------
PyObject *cxoTransform_timestampFromTicks(PyObject *args)
{
return PyDateTime_FromTimestamp(args);
}
//-----------------------------------------------------------------------------
// cxoTransform_toPython()
// Transforms a database value into its corresponding Python object.
//-----------------------------------------------------------------------------
PyObject *cxoTransform_toPython(cxoTransformNum transformNum,
cxoConnection *connection, cxoObjectType *objType,
dpiDataBuffer *dbValue)
{
const cxoTransform *transform;
PyObject *stringObj, *result;
dpiIntervalDS *intervalDS;
dpiTimestamp *timestamp;
uint32_t rowidLength;
const char *rowid;
cxoCursor *cursor;
dpiBytes *bytes;
int32_t seconds;
transform = &cxoAllTransforms[transformNum];
switch (transformNum) {
case CXO_TRANSFORM_BINARY:
case CXO_TRANSFORM_LONG_BINARY:
bytes = &dbValue->asBytes;
return PyBytes_FromStringAndSize(bytes->ptr, bytes->length);
case CXO_TRANSFORM_BFILE:
case CXO_TRANSFORM_BLOB:
case CXO_TRANSFORM_CLOB:
case CXO_TRANSFORM_NCLOB:
return cxoLob_new(connection, transform->oracleTypeNum,
dbValue->asLOB);
case CXO_TRANSFORM_BOOLEAN:
if (dbValue->asBoolean)
Py_RETURN_TRUE;
Py_RETURN_FALSE;
case CXO_TRANSFORM_CURSOR:
cursor = (cxoCursor*) PyObject_CallMethod((PyObject*) connection,
"cursor", NULL);
if (!cursor)
return NULL;
cursor->handle = dbValue->asStmt;
dpiStmt_addRef(cursor->handle);
cursor->fixupRefCursor = 1;
return (PyObject*) cursor;
case CXO_TRANSFORM_DATE:
timestamp = &dbValue->asTimestamp;
return PyDate_FromDate(timestamp->year, timestamp->month,
timestamp->day);
case CXO_TRANSFORM_DATETIME:
case CXO_TRANSFORM_TIMESTAMP:
case CXO_TRANSFORM_TIMESTAMP_LTZ:
timestamp = &dbValue->asTimestamp;
return PyDateTime_FromDateAndTime(timestamp->year,
timestamp->month, timestamp->day, timestamp->hour,
timestamp->minute, timestamp->second,
timestamp->fsecond / 1000);
case CXO_TRANSFORM_DECIMAL:
bytes = &dbValue->asBytes;
stringObj = cxoPyString_fromEncodedString(bytes->ptr,
bytes->length, bytes->encoding);
if (!stringObj)
return NULL;
result = PyObject_CallFunctionObjArgs(
(PyObject*) cxoPyTypeDecimal, stringObj, NULL);
Py_DECREF(stringObj);
return result;
case CXO_TRANSFORM_FIXED_NCHAR:
case CXO_TRANSFORM_NSTRING:
bytes = &dbValue->asBytes;
return PyUnicode_Decode(bytes->ptr, bytes->length, bytes->encoding,
NULL);
case CXO_TRANSFORM_FLOAT:
case CXO_TRANSFORM_NATIVE_DOUBLE:
return PyFloat_FromDouble(dbValue->asDouble);
case CXO_TRANSFORM_NATIVE_FLOAT:
return PyFloat_FromDouble(dbValue->asFloat);
case CXO_TRANSFORM_INT:
case CXO_TRANSFORM_NATIVE_INT:
return PyInt_FromLong((long) dbValue->asInt64);
case CXO_TRANSFORM_LONG_INT:
bytes = &dbValue->asBytes;
stringObj = cxoPyString_fromEncodedString(bytes->ptr,
bytes->length, NULL);
if (!stringObj)
return NULL;
#if PY_MAJOR_VERSION >= 3
result = PyNumber_Long(stringObj);
#else
result = PyNumber_Int(stringObj);
#endif
if (!result && PyErr_ExceptionMatches(PyExc_ValueError)) {
PyErr_Clear();
result = PyNumber_Float(stringObj);
}
Py_DECREF(stringObj);
return result;
case CXO_TRANSFORM_OBJECT:
return cxoObject_new(objType, dbValue->asObject);
case CXO_TRANSFORM_ROWID:
if (dpiRowid_getStringValue(dbValue->asRowid, &rowid,
&rowidLength) < 0)
return cxoError_raiseAndReturnNull();
return cxoPyString_fromEncodedString(rowid, rowidLength,
connection->encodingInfo.encoding);
case CXO_TRANSFORM_FIXED_CHAR:
case CXO_TRANSFORM_STRING:
case CXO_TRANSFORM_LONG_STRING:
bytes = &dbValue->asBytes;
return cxoPyString_fromEncodedString(bytes->ptr, bytes->length,
bytes->encoding);
case CXO_TRANSFORM_TIMEDELTA:
intervalDS = &dbValue->asIntervalDS;
seconds = intervalDS->hours * 60 * 60 + intervalDS->minutes * 60 +
intervalDS->seconds;
return PyDelta_FromDSU(intervalDS->days, seconds,
intervalDS->fseconds / 1000);
default:
break;
}
PyErr_SetString(cxoNotSupportedErrorException,
"Database value cannot be converted to a Python value");
return NULL;
}
You can’t perform that action at this time.