/*
* Copyright 2004-2011 H2 Group. Multiple-Licensed under the H2 License,
* Version 1.0, and under the Eclipse Public License, Version 1.0
* (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.test.db;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import org.h2.constant.ErrorCode;
import org.h2.test.TestBase;
/**
* Test for views.
*/
public class TestView extends TestBase {
private static int x;
/**
* Run just this test.
*
* @param a ignored
*/
public static void main(String... a) throws Exception {
TestBase.createCaller().init().test();
}
public void test() throws SQLException {
testEmptyColumn();
testChangeSchemaSearchPath();
testParameterizedView();
testCache();
testCacheFunction(true);
testCacheFunction(false);
testInSelect();
testUnionReconnect();
testManyViews();
deleteDb("view");
}
private void testEmptyColumn() throws SQLException {
deleteDb("view");
Connection conn = getConnection("view");
Statement stat = conn.createStatement();
stat.execute("create table test(a int, b int)");
stat.execute("create view test_view as select a, b from test");
stat.execute("select * from test_view where a between 1 and 2 and b = 2");
conn.close();
}
private void testChangeSchemaSearchPath() throws SQLException {
deleteDb("view");
Connection conn = getConnection("view;FUNCTIONS_IN_SCHEMA=TRUE");
Statement stat = conn.createStatement();
stat.execute("CREATE ALIAS X AS $$ int x() { return 1; } $$;");
stat.execute("CREATE SCHEMA S");
stat.execute("CREATE VIEW S.TEST AS SELECT X() FROM DUAL");
stat.execute("SET SCHEMA=S");
stat.execute("SET SCHEMA_SEARCH_PATH=S");
stat.execute("SELECT * FROM TEST");
conn.close();
}
private void testParameterizedView() throws SQLException {
deleteDb("view");
Connection conn = getConnection("view");
Statement stat = conn.createStatement();
stat.execute("CREATE TABLE Test(id INT AUTO_INCREMENT NOT NULL, f1 VARCHAR NOT NULL, f2 VARCHAR NOT NULL)");
stat.execute("INSERT INTO Test(f1, f2) VALUES ('value1','value2')");
stat.execute("INSERT INTO Test(f1, f2) VALUES ('value1','value3')");
PreparedStatement ps = conn.prepareStatement("CREATE VIEW Test_View AS SELECT f2 FROM Test WHERE f1=?");
ps.setString(1, "value1");
assertThrows(ErrorCode.FEATURE_NOT_SUPPORTED_1, ps).
executeUpdate();
// ResultSet rs;
// rs = stat.executeQuery("SELECT * FROM Test_View");
// assertTrue(rs.next());
// assertFalse(rs.next());
// rs = stat.executeQuery("select VIEW_DEFINITION " +
// "from information_schema.views " +
// "where TABLE_NAME='TEST_VIEW'");
// rs.next();
// assertEquals("...", rs.getString(1));
conn.close();
}
private void testCacheFunction(boolean deterministic) throws SQLException {
deleteDb("view");
Connection conn = getConnection("view");
Statement stat = conn.createStatement();
x = 8;
stat.execute("CREATE ALIAS GET_X " +
(deterministic ? "DETERMINISTIC" : "") +
" FOR \"" + getClass().getName() + ".getX\"");
stat.execute("CREATE VIEW V AS SELECT * FROM (SELECT GET_X())");
ResultSet rs;
rs = stat.executeQuery("SELECT * FROM V");
rs.next();
assertEquals(8, rs.getInt(1));
x = 5;
rs = stat.executeQuery("SELECT * FROM V");
rs.next();
assertEquals(deterministic ? 8 : 5, rs.getInt(1));
conn.close();
}
/**
* This method is called via reflection from the database.
*
* @return the static value x
*/
public static int getX() {
return x;
}
private void testCache() throws SQLException {
deleteDb("view");
Connection conn = getConnection("view");
Statement stat = conn.createStatement();
stat.execute("SET @X 8");
stat.execute("CREATE VIEW V AS SELECT * FROM (SELECT @X)");
ResultSet rs;
rs = stat.executeQuery("SELECT * FROM V");
rs.next();
assertEquals(8, rs.getInt(1));
stat.execute("SET @X 5");
rs = stat.executeQuery("SELECT * FROM V");
rs.next();
assertEquals(5, rs.getInt(1));
conn.close();
}
private void testInSelect() throws SQLException {
deleteDb("view");
Connection conn = getConnection("view");
Statement stat = conn.createStatement();
stat.execute("create table test(id int primary key) as select 1");
PreparedStatement prep = conn.prepareStatement(
"select * from test t where t.id in (select t2.id from test t2 where t2.id in (?, ?))");
prep.setInt(1, 1);
prep.setInt(2, 2);
prep.execute();
conn.close();
}
private void testUnionReconnect() throws SQLException {
if (config.memory) {
return;
}
deleteDb("view");
Connection conn = getConnection("view");
Statement stat = conn.createStatement();
stat.execute("create table t1(k smallint, ts timestamp(6))");
stat.execute("create table t2(k smallint, ts timestamp(6))");
stat.execute("create table t3(k smallint, ts timestamp(6))");
stat.execute("create view v_max_ts as select " +
"max(ts) from (select max(ts) as ts from t1 " +
"union select max(ts) as ts from t2 " +
"union select max(ts) as ts from t3)");
stat.execute("create view v_test as select max(ts) as ts from t1 " +
"union select max(ts) as ts from t2 " +
"union select max(ts) as ts from t3");
conn.close();
conn = getConnection("view");
stat = conn.createStatement();
stat.execute("select * from v_max_ts");
conn.close();
deleteDb("view");
}
private void testManyViews() throws SQLException {
deleteDb("view");
Connection conn = getConnection("view");
Statement s = conn.createStatement();
s.execute("create table t0(id int primary key)");
s.execute("insert into t0 values(1), (2), (3)");
for (int i = 0; i < 30; i++) {
s.execute("create view t" + (i + 1) + " as select * from t" + i);
s.execute("select * from t" + (i + 1));
ResultSet rs = s.executeQuery("select count(*) from t" + (i + 1) + " where id=2");
assertTrue(rs.next());
assertEquals(1, rs.getInt(1));
}
conn.close();
conn = getConnection("view");
conn.close();
deleteDb("view");
}
}