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/**
* Derby - Class org.apache.derbyTesting.functionTests.tests.lang.ConstantExpressionTest
*
* Licensed to the Apache Software Foundation (ASF) under one or more contributor license
* agreements. See the NOTICE file distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package org.apache.derbyTesting.functionTests.tests.lang;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import junit.framework.Test;
import org.apache.derbyTesting.junit.BaseJDBCTestCase;
import org.apache.derbyTesting.junit.JDBC;
import org.apache.derbyTesting.junit.TestConfiguration;
/**
* Test case for constantExpression.sql, which provides tests
* for constant expression evaluation.
*/
public class ConstantExpressionTest extends BaseJDBCTestCase {
/**
* Constructor.
*/
public ConstantExpressionTest(String name) throws SQLException {
super(name);
}
public static Test suite(){
return TestConfiguration.defaultSuite(
ConstantExpressionTest.class);
}
/**
* Create the table t1 with 3 rows, and two procedures.
* @throws SQLException
* if SQLException is thrown.
* @see junit.framework.TestCase#setUp()
*/
public void setUp() throws SQLException{
String sql = "create table t1(c1 int)";
Statement st = createStatement();
st.executeUpdate(sql);
sql = "insert into t1 values 1, 2, 3";
assertEquals("Fail to insert into table", 3, st.executeUpdate(sql));
st.close();
}
/**
* Drop table t1 and close two procedures.
* @throws Exception
* if Exception is thrown.
* @see org.apache.derbyTesting.junit.BaseJDBCTestCase#tearDown()
*/
public void tearDown() throws Exception {
dropTable("t1");
super.tearDown();
}
/**
* Test false constant expressions.
* @throws SQLException
* if SQLException is thrown.
*/
public void testFalseConstantExpressions() throws SQLException{
String[] falseCases = {
"1 <> 1", "1 = 1 and 1 = 0", "1 = (2 + 3 - 2)",
"(case when 1 = 1 then 0 else 1 end) = 1",
"1 in (2, 3, 4)", "1 between 2 and 3",
};
Statement st = createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
ResultSet.CONCUR_READ_ONLY);
ResultSet rs;
String sql;
for(int i = 0; i < falseCases.length; i++){
sql = "select * from t1 where " + falseCases[i];
rs = st.executeQuery(sql);
JDBC.assertEmpty(rs);
}
st.close();
sql = "select * from t1 where ? = 1";
PreparedStatement ps1 = prepareStatement(sql);
ps1.setInt(1, 0);
rs = ps1.executeQuery();
JDBC.assertEmpty(rs);
ps1.close();
sql = "select * from t1 where cast(? as int) = 1";
PreparedStatement ps2 = prepareStatement(sql);
ps2.setInt(1, 0);
rs = ps2.executeQuery();
JDBC.assertEmpty(rs);
ps2.close();
}
/**
* Test true constant expressions.
* @throws SQLException
*/
public void testTrueConstantExpressions() throws SQLException{
String[] trueCases = {
"1 = 1", "1 = 0 or 1 = 1", "1 + 2 = (2 + 3 - 2)",
"(case when 1 = 1 then 1 else 0 end) = 1",
"1 in (2, 3, 4, 4, 3, 2, 1)", "1 + 1 between 0 and 3",
};
String[][] content = {
{ "1", }, { "2", }, { "3", },
};
Statement st = createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
ResultSet.CONCUR_READ_ONLY);
ResultSet rs;
String sql;
for(int i = 0; i < trueCases.length; i++){
sql = "select * from t1 where " + trueCases[i];
rs = st.executeQuery(sql);
JDBC.assertFullResultSet(rs, content);
}
st.close();
sql = "select * from t1 where ? = 1";
PreparedStatement ps1 = prepareStatement(sql);
ps1.setInt(1, 1);
rs = ps1.executeQuery();
JDBC.assertFullResultSet(rs, content);
ps1.close();
sql = "select * from t1 where cast(? as int) = 1";
PreparedStatement ps2 = prepareStatement(sql);
ps2.setInt(1, 1);
rs = ps2.executeQuery();
JDBC.assertFullResultSet(rs, content);
ps2.close();
}
}
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