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#------------------------------------------------------------------------------
# Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
#------------------------------------------------------------------------------
"""Module for testing DML returning clauses."""
import sys
class TestDMLReturning(BaseTestCase):
def testInsert(self):
"test insert statement (single row) with DML returning"
self.cursor.execute("truncate table TestTempTable")
intVal = 5
strVal = "A test string"
intVar = self.cursor.var(cx_Oracle.NUMBER)
strVar = self.cursor.var(str)
self.cursor.execute("""
insert into TestTempTable
values (:intVal, :strVal)
returning IntCol, StringCol into :intVar, :strVar""",
intVal = intVal,
strVal = strVal,
intVar = intVar,
strVar = strVar)
self.assertEqual(intVar.values, [[intVal]])
self.assertEqual(strVar.values, [[strVal]])
def testInsertMany(self):
"test insert statement (multiple rows) with DML returning"
self.cursor.execute("truncate table TestTempTable")
intValues = [5, 8, 17, 24, 6]
strValues = ["Test 5", "Test 8", "Test 17", "Test 24", "Test 6"]
intVar = self.cursor.var(cx_Oracle.NUMBER, arraysize = len(intValues))
strVar = self.cursor.var(str, arraysize = len(intValues))
self.cursor.setinputsizes(None, None, intVar, strVar)
data = list(zip(intValues, strValues))
self.cursor.executemany("""
insert into TestTempTable
values (:intVal, :strVal)
returning IntCol, StringCol into :intVar, :strVar""", data)
self.assertEqual(intVar.values, [[v] for v in intValues])
self.assertEqual(strVar.values, [[v] for v in strValues])
def testInsertWithSmallSize(self):
"test insert statement with DML returning into too small a variable"
self.cursor.execute("truncate table TestTempTable")
intVal = 6
strVal = "A different test string"
intVar = self.cursor.var(cx_Oracle.NUMBER)
strVar = self.cursor.var(str, 2)
parameters = dict(intVal = intVal, strVal = strVal, intVar = intVar,
strVar = strVar)
self.assertRaises(cx_Oracle.DatabaseError, self.cursor.execute, """
insert into TestTempTable
values (:intVal, :strVal)
returning IntCol, StringCol into :intVar, :strVar""",
parameters)
def testUpdateSingleRow(self):
"test update single row statement with DML returning"
intVal = 7
strVal = "The updated value of the string"
self.cursor.execute("truncate table TestTempTable")
self.cursor.execute("insert into TestTempTable values (:1, :2)",
(intVal, "The initial value of the string"))
intVar = self.cursor.var(cx_Oracle.NUMBER)
strVar = self.cursor.var(str)
self.cursor.execute("""
update TestTempTable set
StringCol = :strVal
where IntCol = :intVal
returning IntCol, StringCol into :intVar, :strVar""",
intVal = intVal,
strVal = strVal,
intVar = intVar,
strVar = strVar)
self.assertEqual(intVar.values, [[intVal]])
self.assertEqual(strVar.values, [[strVal]])
def testUpdateNoRows(self):
"test update no rows statement with DML returning"
intVal = 8
strVal = "The updated value of the string"
self.cursor.execute("truncate table TestTempTable")
self.cursor.execute("insert into TestTempTable values (:1, :2)",
(intVal, "The initial value of the string"))
intVar = self.cursor.var(cx_Oracle.NUMBER)
strVar = self.cursor.var(str)
self.cursor.execute("""
update TestTempTable set
StringCol = :strVal
where IntCol = :intVal
returning IntCol, StringCol into :intVar, :strVar""",
intVal = intVal + 1,
strVal = strVal,
intVar = intVar,
strVar = strVar)
self.assertEqual(intVar.values, [[]])
self.assertEqual(strVar.values, [[]])
self.assertEqual(intVar.getvalue(), [])
self.assertEqual(strVar.getvalue(), [])
def testUpdateMultipleRows(self):
"test update multiple rows statement with DML returning"
self.cursor.execute("truncate table TestTempTable")
for i in (8, 9, 10):
self.cursor.execute("insert into TestTempTable values (:1, :2)",
(i, "The initial value of string %d" % i))
intVar = self.cursor.var(cx_Oracle.NUMBER)
strVar = self.cursor.var(str)
self.cursor.execute("""
update TestTempTable set
IntCol = IntCol + 15,
StringCol = 'The final value of string ' || to_char(IntCol)
returning IntCol, StringCol into :intVar, :strVar""",
intVar = intVar,
strVar = strVar)
self.assertEqual(self.cursor.rowcount, 3)
self.assertEqual(intVar.values, [[23, 24, 25]])
self.assertEqual(strVar.values, [[
"The final value of string 8",
"The final value of string 9",
"The final value of string 10"
]])
def testUpdateMultipleRowsExecuteMany(self):
"test update multiple rows with DML returning (executeMany)"
data = [(i, "The initial value of string %d" % i) \
for i in range(1, 11)]
self.cursor.execute("truncate table TestTempTable")
self.cursor.executemany("insert into TestTempTable values (:1, :2)",
data)
intVar = self.cursor.var(cx_Oracle.NUMBER, arraysize = 3)
strVar = self.cursor.var(str, arraysize = 3)
self.cursor.setinputsizes(None, intVar, strVar)
self.cursor.executemany("""
update TestTempTable set
IntCol = IntCol + 25,
StringCol = 'Updated value of string ' || to_char(IntCol)
where IntCol < :inVal
returning IntCol, StringCol into :intVar, :strVar""",
[[3], [8], [11]])
self.assertEqual(intVar.values, [
[26, 27],
[28, 29, 30, 31, 32],
[33, 34, 35]
])
self.assertEqual(strVar.values, [
[ "Updated value of string 1",
"Updated value of string 2" ],
[ "Updated value of string 3",
"Updated value of string 4",
"Updated value of string 5",
"Updated value of string 6",
"Updated value of string 7" ],
[ "Updated value of string 8",
"Updated value of string 9",
"Updated value of string 10" ]
])
def testInsertAndReturnObject(self):
"test inserting an object with DML returning"
typeObj = self.connection.gettype("UDT_OBJECT")
stringValue = "The string that will be verified"
obj = typeObj.newobject()
obj.STRINGVALUE = stringValue
outVar = self.cursor.var(cx_Oracle.OBJECT, typename = "UDT_OBJECT")
self.cursor.execute("""
insert into TestObjects (IntCol, ObjectCol)
values (4, :obj)
returning ObjectCol into :outObj""",
obj = obj, outObj = outVar)
result, = outVar.getvalue()
self.assertEqual(result.STRINGVALUE, stringValue)
self.connection.rollback()
def testInsertAndReturnRowid(self):
"test inserting a row and returning a rowid"
self.cursor.execute("truncate table TestTempTable")
var = self.cursor.var(cx_Oracle.ROWID)
self.cursor.execute("""
insert into TestTempTable values (278, 'String 278')
returning rowid into :1""", (var,))
rowid, = var.getvalue()
self.cursor.execute("select * from TestTempTable where rowid = :1",
(rowid,))
self.assertEqual(self.cursor.fetchall(), [(278, 'String 278')])
def testInsertWithRefCursor(self):
"test inserting with a REF cursor and returning a rowid"
self.cursor.execute("truncate table TestTempTable")
var = self.cursor.var(cx_Oracle.ROWID)
inCursor = self.connection.cursor()
inCursor.execute("""
select StringCol
from TestStrings
where IntCol >= 5
order by IntCol""")
self.cursor.execute("""
insert into TestTempTable
values (187, pkg_TestRefCursors.TestInCursor(:1))
returning rowid into :2""", (inCursor, var))
rowid, = var.getvalue()
self.cursor.execute("select * from TestTempTable where rowid = :1",
(rowid,))
self.assertEqual(self.cursor.fetchall(),
[(187, 'String 7 (Modified)')])
def testDeleteReturningDecreasingRowsReturned(self):
"test delete returning multiple times with decreasing number of rows"
data = [(i, "Test String %d" % i) for i in range(1, 11)]
self.cursor.execute("truncate table TestTempTable")
self.cursor.executemany("insert into TestTempTable values (:1, :2)",
data)
results = []
intVar = self.cursor.var(int)
self.cursor.setinputsizes(None, intVar)
for intVal in (5, 8, 10):
self.cursor.execute("""
delete from TestTempTable
where IntCol < :1
returning IntCol into :2""", [intVal])
results.append(intVar.getvalue())
self.assertEqual(results, [ [1, 2, 3, 4], [5, 6, 7], [8, 9] ])
def testDeleteReturningNoRowsAfterManyRows(self):
"test delete returning no rows after initially returning many rows"
data = [(i, "Test String %d" % i) for i in range(1, 11)]
self.cursor.execute("truncate table TestTempTable")
self.cursor.executemany("insert into TestTempTable values (:1, :2)",
data)
intVar = self.cursor.var(int)
self.cursor.execute("""
delete from TestTempTable
where IntCol < :1
returning IntCol into :2""", [5, intVar])
self.assertEqual(intVar.getvalue(), [1, 2, 3, 4])
self.cursor.execute(None, [4, intVar])
self.assertEqual(intVar.getvalue(), [])
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