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288 lines (258 loc) · 9.79 KB
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//-----------------------------------------------------------------------------
// Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// cxoDbType.c
// Defines the objects used for identifying all types used by the database.
//-----------------------------------------------------------------------------
#include "cxoModule.h"
//-----------------------------------------------------------------------------
// cxoDbType_free()
// Free the database type object.
//-----------------------------------------------------------------------------
static void cxoDbType_free(cxoDbType *dbType)
{
Py_TYPE(dbType)->tp_free((PyObject*) dbType);
}
//-----------------------------------------------------------------------------
// cxoDbType_repr()
// Return a string representation of a queue.
//-----------------------------------------------------------------------------
static PyObject *cxoDbType_repr(cxoDbType *dbType)
{
PyObject *module, *name, *dbTypeName, *result;
dbTypeName = PyUnicode_DecodeASCII(dbType->name, strlen(dbType->name),
NULL);
if (!dbTypeName)
return NULL;
if (cxoUtils_getModuleAndName(Py_TYPE(dbType), &module, &name) < 0) {
Py_DECREF(dbTypeName);
return NULL;
}
result = cxoUtils_formatString("<%s.%s %s>",
PyTuple_Pack(3, module, name, dbTypeName));
Py_DECREF(module);
Py_DECREF(name);
Py_DECREF(dbTypeName);
return result;
}
//-----------------------------------------------------------------------------
// cxoDbType_richCompare()
// Peforms a comparison between the database type and another Python object.
// Equality (and inequality) are used to match database API types with their
// associated database types.
//-----------------------------------------------------------------------------
static PyObject *cxoDbType_richCompare(cxoDbType* dbType, PyObject* obj,
int op)
{
cxoApiType *apiType;
int status, equal;
// only equality and inequality can be checked
if (op != Py_EQ && op != Py_NE) {
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
// check for exact object
equal = 0;
if (obj == (PyObject*) dbType) {
equal = 1;
// check for API type
} else {
status = PyObject_IsInstance(obj, (PyObject*) &cxoPyTypeApiType);
if (status < 0)
return NULL;
if (status == 1) {
apiType = (cxoApiType*) obj;
status = PySequence_Contains(apiType->dbTypes, (PyObject*) dbType);
if (status < 0)
return NULL;
equal = (status == 1) ? 1 : 0;
}
}
// determine return value
if ((equal && op == Py_EQ) || (!equal && op == Py_NE)) {
Py_RETURN_TRUE;
}
Py_RETURN_FALSE;
}
//-----------------------------------------------------------------------------
// cxoDbType_hash()
// Return a hash value for the instance.
//-----------------------------------------------------------------------------
static Py_hash_t cxoDbType_hash(cxoDbType *dbType)
{
return (Py_hash_t) dbType->num;
}
//-----------------------------------------------------------------------------
// cxoDbType_fromDataTypeInfo()
// Return the database type given the data type info available from ODPI-C.
//-----------------------------------------------------------------------------
cxoDbType *cxoDbType_fromDataTypeInfo(dpiDataTypeInfo *info)
{
char message[120];
switch (info->oracleTypeNum) {
case DPI_ORACLE_TYPE_VARCHAR:
return cxoDbTypeVarchar;
case DPI_ORACLE_TYPE_NVARCHAR:
return cxoDbTypeNvarchar;
case DPI_ORACLE_TYPE_CHAR:
return cxoDbTypeChar;
case DPI_ORACLE_TYPE_NCHAR:
return cxoDbTypeNchar;
case DPI_ORACLE_TYPE_ROWID:
return cxoDbTypeRowid;
case DPI_ORACLE_TYPE_RAW:
return cxoDbTypeRaw;
case DPI_ORACLE_TYPE_NATIVE_DOUBLE:
return cxoDbTypeBinaryDouble;
case DPI_ORACLE_TYPE_NATIVE_FLOAT:
return cxoDbTypeBinaryFloat;
case DPI_ORACLE_TYPE_NATIVE_INT:
return cxoDbTypeBinaryInteger;
case DPI_ORACLE_TYPE_NUMBER:
return cxoDbTypeNumber;
case DPI_ORACLE_TYPE_DATE:
return cxoDbTypeDate;
case DPI_ORACLE_TYPE_TIMESTAMP:
return cxoDbTypeTimestamp;
case DPI_ORACLE_TYPE_TIMESTAMP_TZ:
return cxoDbTypeTimestampTZ;
case DPI_ORACLE_TYPE_TIMESTAMP_LTZ:
return cxoDbTypeTimestampLTZ;
case DPI_ORACLE_TYPE_INTERVAL_DS:
return cxoDbTypeIntervalDS;
case DPI_ORACLE_TYPE_INTERVAL_YM:
return cxoDbTypeIntervalYM;
case DPI_ORACLE_TYPE_CLOB:
return cxoDbTypeClob;
case DPI_ORACLE_TYPE_NCLOB:
return cxoDbTypeNclob;
case DPI_ORACLE_TYPE_BLOB:
return cxoDbTypeBlob;
case DPI_ORACLE_TYPE_BFILE:
return cxoDbTypeBfile;
case DPI_ORACLE_TYPE_STMT:
return cxoDbTypeCursor;
case DPI_ORACLE_TYPE_OBJECT:
return cxoDbTypeObject;
case DPI_ORACLE_TYPE_LONG_VARCHAR:
return cxoDbTypeLong;
case DPI_ORACLE_TYPE_LONG_RAW:
return cxoDbTypeLongRaw;
case DPI_ORACLE_TYPE_BOOLEAN:
return cxoDbTypeBoolean;
default:
break;
}
snprintf(message, sizeof(message), "Oracle type %d not supported.",
info->oracleTypeNum);
cxoError_raiseFromString(cxoNotSupportedErrorException, message);
return NULL;
}
//-----------------------------------------------------------------------------
// cxoDbType_fromTransformNum()
// Return the database type given the transformation number.
//-----------------------------------------------------------------------------
cxoDbType *cxoDbType_fromTransformNum(cxoTransformNum transformNum)
{
char message[120];
switch (transformNum) {
case CXO_TRANSFORM_BINARY:
return cxoDbTypeRaw;
case CXO_TRANSFORM_BFILE:
return cxoDbTypeBfile;
case CXO_TRANSFORM_BLOB:
return cxoDbTypeBlob;
case CXO_TRANSFORM_BOOLEAN:
return cxoDbTypeBoolean;
case CXO_TRANSFORM_CLOB:
return cxoDbTypeClob;
case CXO_TRANSFORM_CURSOR:
return cxoDbTypeCursor;
case CXO_TRANSFORM_DATE:
case CXO_TRANSFORM_DATETIME:
return cxoDbTypeDate;
case CXO_TRANSFORM_DECIMAL:
case CXO_TRANSFORM_FLOAT:
case CXO_TRANSFORM_INT:
return cxoDbTypeNumber;
case CXO_TRANSFORM_FIXED_CHAR:
return cxoDbTypeChar;
case CXO_TRANSFORM_FIXED_NCHAR:
return cxoDbTypeNchar;
case CXO_TRANSFORM_LONG_BINARY:
return cxoDbTypeLongRaw;
case CXO_TRANSFORM_LONG_STRING:
return cxoDbTypeLong;
case CXO_TRANSFORM_NATIVE_DOUBLE:
return cxoDbTypeBinaryDouble;
case CXO_TRANSFORM_NATIVE_FLOAT:
return cxoDbTypeBinaryFloat;
case CXO_TRANSFORM_NATIVE_INT:
return cxoDbTypeBinaryInteger;
case CXO_TRANSFORM_NCLOB:
return cxoDbTypeNclob;
case CXO_TRANSFORM_NSTRING:
return cxoDbTypeNvarchar;
case CXO_TRANSFORM_OBJECT:
return cxoDbTypeObject;
case CXO_TRANSFORM_ROWID:
return cxoDbTypeRowid;
case CXO_TRANSFORM_NONE:
case CXO_TRANSFORM_STRING:
return cxoDbTypeVarchar;
case CXO_TRANSFORM_TIMEDELTA:
return cxoDbTypeIntervalDS;
case CXO_TRANSFORM_TIMESTAMP:
return cxoDbTypeTimestamp;
case CXO_TRANSFORM_TIMESTAMP_LTZ:
return cxoDbTypeTimestampLTZ;
case CXO_TRANSFORM_TIMESTAMP_TZ:
return cxoDbTypeTimestampTZ;
case CXO_TRANSFORM_JSON:
return cxoDbTypeJson;
default:
break;
}
snprintf(message, sizeof(message), "transform %d not supported.",
transformNum);
cxoError_raiseFromString(cxoNotSupportedErrorException, message);
return NULL;
}
//-----------------------------------------------------------------------------
// cxoDBType_reduce()
// Method provided for pickling/unpickling of DB types.
//-----------------------------------------------------------------------------
static PyObject *cxoDBType_reduce(cxoDbType *dbType)
{
return PyUnicode_DecodeASCII(dbType->name, strlen(dbType->name), NULL);
}
//-----------------------------------------------------------------------------
// declaration of methods
//-----------------------------------------------------------------------------
static PyMethodDef cxoMethods[] = {
{ "__reduce__", (PyCFunction) cxoDBType_reduce, METH_NOARGS },
{ NULL, NULL}
};
//-----------------------------------------------------------------------------
// declaration of members
//-----------------------------------------------------------------------------
static PyMemberDef cxoMembers[] = {
{ "name", T_STRING, offsetof(cxoDbType, name), READONLY },
{ NULL }
};
//-----------------------------------------------------------------------------
// Python type declaration
//-----------------------------------------------------------------------------
PyTypeObject cxoPyTypeDbType = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "cx_Oracle.DbType",
.tp_basicsize = sizeof(cxoDbType),
.tp_dealloc = (destructor) cxoDbType_free,
.tp_repr = (reprfunc) cxoDbType_repr,
.tp_flags = Py_TPFLAGS_DEFAULT,
.tp_members = cxoMembers,
.tp_methods = cxoMethods,
.tp_richcompare = (richcmpfunc) cxoDbType_richCompare,
.tp_hash = (hashfunc) cxoDbType_hash
};
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