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#------------------------------------------------------------------------------
# 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.
#------------------------------------------------------------------------------
"""Module for testing LOB (CLOB and BLOB) variables."""
import sys
class TestLobVar(BaseTestCase):
def __GetTempLobs(self, sid):
cursor = self.connection.cursor()
cursor.execute("""
select abstract_lobs
from v$temporary_lobs
where sid = :sid""", sid = sid)
row = cursor.fetchone()
if row is None:
return 0
return int(row[0])
def __PerformTest(self, lobType, inputType):
longString = ""
directType = getattr(cx_Oracle, lobType)
self.cursor.execute("truncate table Test%ss" % lobType)
for i in range(0, 11):
if i > 0:
char = chr(ord('A') + i - 1)
longString += char * 25000
elif inputType != directType:
continue
self.cursor.setinputsizes(longString = inputType)
if lobType == "BLOB" and sys.version_info[0] >= 3:
bindValue = longString.encode("ascii")
else:
bindValue = longString
self.cursor.execute("""
insert into Test%ss (
IntCol,
%sCol
) values (
:integerValue,
:longString
)""" % (lobType, lobType),
integerValue = i,
longString = bindValue)
self.connection.commit()
self.cursor.execute("""
select *
from Test%ss
order by IntCol""" % lobType)
self.__ValidateQuery(self.cursor, lobType)
def __TestLobOperations(self, lobType):
self.cursor.execute("truncate table Test%ss" % lobType)
self.cursor.setinputsizes(longString = getattr(cx_Oracle, lobType))
longString = "X" * 75000
writeValue = "TEST"
if lobType == "BLOB" and sys.version_info[0] >= 3:
longString = longString.encode("ascii")
writeValue = writeValue.encode("ascii")
self.cursor.execute("""
insert into Test%ss (
IntCol,
%sCol
) values (
:integerValue,
:longString
)""" % (lobType, lobType),
integerValue = 1,
longString = longString)
self.cursor.execute("""
select %sCol
from Test%ss
where IntCol = 1""" % (lobType, lobType))
lob, = self.cursor.fetchone()
self.assertEqual(lob.isopen(), False)
lob.open()
self.assertEqual(lob.isopen(), True)
lob.close()
self.assertEqual(lob.isopen(), False)
self.assertEqual(lob.size(), 75000)
lob.write(writeValue, 75001)
self.assertEqual(lob.size(), 75000 + len(writeValue))
self.assertEqual(lob.read(), longString + writeValue)
lob.write(writeValue, 1)
self.assertEqual(lob.read(), writeValue + longString[4:] + writeValue)
lob.trim(25000)
self.assertEqual(lob.size(), 25000)
lob.trim()
self.assertEqual(lob.size(), 0)
def __TestTemporaryLOB(self, lobType):
self.cursor.execute("truncate table Test%ss" % lobType)
value = "A test string value"
if lobType == "BLOB" and sys.version_info[0] >= 3:
value = value.encode("ascii")
lobTypeObj = getattr(cx_Oracle, lobType)
lob = self.connection.createlob(lobTypeObj)
lob.write(value)
self.cursor.execute("""
insert into Test%ss (IntCol, %sCol)
values (:intVal, :lobVal)""" % (lobType, lobType),
intVal = 1,
lobVal = lob)
self.cursor.execute("select %sCol from Test%ss" % (lobType, lobType))
lob, = self.cursor.fetchone()
self.assertEqual(lob.read(), value)
def __ValidateQuery(self, rows, lobType):
longString = ""
for row in rows:
integerValue, lob = row
if integerValue == 0:
self.assertEqual(lob.size(), 0)
expectedValue = ""
if lobType == "BLOB" and sys.version_info[0] >= 3:
expectedValue = expectedValue.encode("ascii")
self.assertEqual(lob.read(), expectedValue)
else:
char = chr(ord('A') + integerValue - 1)
prevChar = chr(ord('A') + integerValue - 2)
longString += char * 25000
if lobType == "BLOB" and sys.version_info[0] >= 3:
actualValue = longString.encode("ascii")
char = char.encode("ascii")
prevChar = prevChar.encode("ascii")
else:
actualValue = longString
self.assertEqual(lob.size(), len(actualValue))
self.assertEqual(lob.read(), actualValue)
if lobType == "CLOB":
self.assertEqual(str(lob), actualValue)
self.assertEqual(lob.read(len(actualValue)), char)
if integerValue > 1:
offset = (integerValue - 1) * 25000 - 4
string = prevChar * 5 + char * 5
self.assertEqual(lob.read(offset, 10), string)
def testBindLobValue(self):
"test binding a LOB value directly"
self.cursor.execute("truncate table TestCLOBs")
self.cursor.execute("insert into TestCLOBs values (1, 'Short value')")
self.cursor.execute("select ClobCol from TestCLOBs")
lob, = self.cursor.fetchone()
self.cursor.execute("insert into TestCLOBs values (2, :value)",
value = lob)
def testBLOBCursorDescription(self):
"test cursor description is accurate for BLOBs"
self.cursor.execute("select * from TestBLOBs")
self.assertEqual(self.cursor.description,
[ ('INTCOL', cx_Oracle.NUMBER, 10, None, 9, 0, 0),
('BLOBCOL', cx_Oracle.BLOB, None, None, None, None, 0) ])
def testBLOBsDirect(self):
"test binding and fetching BLOB data (directly)"
self.__PerformTest("BLOB", cx_Oracle.BLOB)
def testBLOBsIndirect(self):
"test binding and fetching BLOB data (indirectly)"
self.__PerformTest("BLOB", cx_Oracle.LONG_BINARY)
def testBLOBOperations(self):
"test operations on BLOBs"
self.__TestLobOperations("BLOB")
def testCLOBCursorDescription(self):
"test cursor description is accurate for CLOBs"
self.cursor.execute("select * from TestCLOBs")
self.assertEqual(self.cursor.description,
[ ('INTCOL', cx_Oracle.NUMBER, 10, None, 9, 0, 0),
('CLOBCOL', cx_Oracle.CLOB, None, None, None, None, 0) ])
def testCLOBsDirect(self):
"test binding and fetching CLOB data (directly)"
self.__PerformTest("CLOB", cx_Oracle.CLOB)
def testCLOBsIndirect(self):
"test binding and fetching CLOB data (indirectly)"
self.__PerformTest("CLOB", cx_Oracle.LONG_STRING)
def testCLOBOperations(self):
"test operations on CLOBs"
self.__TestLobOperations("CLOB")
def testCreateBlob(self):
"test creating a temporary BLOB"
self.__TestTemporaryLOB("BLOB")
def testCreateClob(self):
"test creating a temporary CLOB"
self.__TestTemporaryLOB("CLOB")
def testCreateNclob(self):
"test creating a temporary NCLOB"
self.__TestTemporaryLOB("NCLOB")
def testMultipleFetch(self):
"test retrieving data from a CLOB after multiple fetches"
self.cursor.arraysize = 1
self.cursor.execute("select * from TestCLOBS")
rows = self.cursor.fetchall()
self.__ValidateQuery(rows, "CLOB")
def testNCLOBCursorDescription(self):
"test cursor description is accurate for NCLOBs"
self.cursor.execute("select * from TestNCLOBs")
self.assertEqual(self.cursor.description,
[ ('INTCOL', cx_Oracle.NUMBER, 10, None, 9, 0, 0),
('NCLOBCOL', cx_Oracle.NCLOB, None, None, None, None, 0) ])
def testNCLOBsDirect(self):
"test binding and fetching NCLOB data (directly)"
self.__PerformTest("NCLOB", cx_Oracle.NCLOB)
def testNCLOBDifferentEncodings(self):
"test binding and fetching NCLOB data (different encodings)"
connection = cx_Oracle.connect(USERNAME, PASSWORD, TNSENTRY,
encoding = "UTF-8", nencoding = "UTF-16")
value = u"\u03b4\u4e2a"
cursor = connection.cursor()
cursor.execute("truncate table TestNCLOBs")
cursor.setinputsizes(val = cx_Oracle.NCHAR)
cursor.execute("insert into TestNCLOBs values (1, :val)", val = value)
cursor.execute("select NCLOBCol from TestNCLOBs")
nclob, = cursor.fetchone()
cursor.setinputsizes(val = cx_Oracle.NCHAR)
cursor.execute("update TestNCLOBs set NCLOBCol = :val",
val = nclob.read() + value)
cursor.execute("select NCLOBCol from TestNCLOBs")
nclob, = cursor.fetchone()
self.assertEqual(nclob.read(), value + value)
def testNCLOBsIndirect(self):
"test binding and fetching NCLOB data (indirectly)"
self.__PerformTest("NCLOB", cx_Oracle.LONG_STRING)
def testNCLOBOperations(self):
"test operations on NCLOBs"
self.__TestLobOperations("NCLOB")
def testTemporaryLobs(self):
"test temporary LOBs"
cursor = self.connection.cursor()
cursor.arraysize = self.cursor.arraysize
cursor.execute("""
select sid
from v$session
where audsid = userenv('sessionid')""")
sid, = cursor.fetchone()
tempLobs = self.__GetTempLobs(sid)
self.assertEqual(tempLobs, 0)
cursor.execute("""
select extract(xmlcol, '/').getclobval()
from TestXML""")
for lob, in cursor:
value = lob.read()
del lob
cursor.close()
tempLobs = self.__GetTempLobs(sid)
self.assertEqual(tempLobs, 0)
def testAssignStringBeyondArraySize(self):
"test assign string to NCLOB beyond array size"
nclobVar = self.cursor.var(cx_Oracle.NCLOB)
self.assertRaises(IndexError, nclobVar.setvalue, 1, "test char")
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