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//-----------------------------------------------------------------------------
// 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;
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:
if (!PyFloat_Check(pyValue) &&
#if PY_MAJOR_VERSION < 3
!PyInt_Check(pyValue) &&
#endif
!PyLong_Check(pyValue)) {
PyErr_SetString(PyExc_TypeError, "expecting float");
return -1;
}
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;
}
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