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DeanChensj
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Merge pull request #18 from sxzh93/alter_test
basic test for alterTable
2 parents 4d00de1 + bc26411 commit 32a260f

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‎script/testing/junit/AlterTableTest.java‎

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@@ -14,6 +14,7 @@
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import org.junit.*;
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import org.junit.rules.ExpectedException;
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import org.postgresql.util.PSQLException;
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import static org.junit.Assert.assertEquals;
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public class AlterTableTest extends PLTestBase {
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private Connection conn;
@@ -32,6 +33,8 @@ public class AlterTableTest extends PLTestBase {
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private static final String SQL_RENAME_COLUMN =
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"ALTER TABLE foo RENAME year to month;";
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private static final double EPSILON = 1e-6;
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@Rule
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public ExpectedException thrown = ExpectedException.none();
@@ -193,4 +196,207 @@ public void test_RenameCol_Concurrent() throws SQLException {
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// conn2.commit();
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// }
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/**
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* Add a column to the table, and do some insertion.
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*/
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@Test
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public void test_AddCol_Basic() throws SQLException {
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String sql = "ALTER TABLE foo ADD month int;";
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conn.createStatement().execute(sql);
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ResultSet rs = conn.createStatement().executeQuery(SQL_SELECT_STAR);
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rs.next();
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checkRow(rs,
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new String [] {"id", "year", "month"},
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new int [] {5, 400, 0});
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assertNoMoreRows(rs);
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String sql2 = "INSERT INTO foo VALUES (6, 500, 1);";
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conn.createStatement().execute(sql2);
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rs = conn.createStatement().executeQuery(SQL_SELECT_STAR);
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rs.next();
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checkRow(rs,
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new String [] {"id", "year", "month"},
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new int [] {5, 400, 0});
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rs.next();
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checkRow(rs,
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new String [] {"id", "year", "month"},
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new int [] {6, 500, 1});
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assertNoMoreRows(rs);
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}
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/**
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* Add a column to a name that already exists, should throw exception
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*/
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@Test
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public void test_AddCol_Exist() throws SQLException {
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String sql = "ALTER TABLE foo ADD year int;";
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// New column already exists
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thrown.expect(PSQLException.class);
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conn.createStatement().execute(sql);
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}
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/**
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* Drop a column from the table.
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*/
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@Test
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public void test_DropCol_Basic() throws SQLException {
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String sql = "ALTER TABLE foo DROP year;";
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conn.createStatement().execute(sql);
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ResultSet rs = conn.createStatement().executeQuery(SQL_SELECT_STAR);
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rs.next();
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checkRow(rs,
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new String [] {"id"},
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new int [] {5});
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assertNoMoreRows(rs);
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String sql2 = "INSERT INTO foo VALUES (6);";
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conn.createStatement().execute(sql2);
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rs = conn.createStatement().executeQuery(SQL_SELECT_STAR);
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rs.next();
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checkRow(rs,
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new String [] {"id"},
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new int [] {5});
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rs.next();
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checkRow(rs,
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new String [] {"id"},
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new int [] {6});
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assertNoMoreRows(rs);
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}
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/**
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* Drop a column that does not exists, should throw exception
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*/
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@Test
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public void test_DropCol_NotExist() throws SQLException {
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String sql = "ALTER TABLE foo DROP month;";
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// Old column does not exist
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thrown.expect(PSQLException.class);
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conn.createStatement().execute(sql);
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}
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/**
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* Alter column type from int to float and then alter to int again.
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*/
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@Test
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public void test_AlterType_Basic() throws SQLException {
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String sql = "ALTER TABLE foo ALTER year TYPE float;";
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conn.createStatement().execute(sql);
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ResultSet rs = conn.createStatement().executeQuery(SQL_SELECT_STAR);
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rs.next();
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assertEquals(rs.getInt("id"), 5);
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assertEquals(rs.getFloat("year"), 400, EPSILON);
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assertNoMoreRows(rs);
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String sql2 = "INSERT INTO foo VALUES (6, 3.5);";
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conn.createStatement().execute(sql2);
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rs = conn.createStatement().executeQuery(SQL_SELECT_STAR);
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rs.next();
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assertEquals(rs.getInt("id"), 5);
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assertEquals(rs.getFloat("year"), 400, EPSILON);
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rs.next();
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assertEquals(rs.getInt("id"), 6);
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assertEquals(rs.getFloat("year"), 3.5, EPSILON);
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assertNoMoreRows(rs);
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String sql3 = "ALTER TABLE foo ALTER year TYPE int;";
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conn.createStatement().execute(sql3);
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rs = conn.createStatement().executeQuery(SQL_SELECT_STAR);
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rs.next();
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assertEquals(rs.getInt("id"), 5);
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assertEquals(rs.getInt("year"), 400);
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rs.next();
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assertEquals(rs.getInt("id"), 6);
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assertEquals(rs.getInt("year"), 3);
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assertNoMoreRows(rs);
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}
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/**
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* Alter column type from int to varchar and backwards.
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*/
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@Test
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public void test_AlterType_Varchar() throws SQLException {
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String sql = "ALTER TABLE foo ALTER year TYPE varchar;";
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conn.createStatement().execute(sql);
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ResultSet rs = conn.createStatement().executeQuery(SQL_SELECT_STAR);
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rs.next();
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assertEquals(rs.getInt("id"), 5);
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assertEquals(rs.getString("year"), Integer.toString(400));
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assertNoMoreRows(rs);
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String sql2 = "ALTER TABLE foo ALTER year TYPE int;";
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conn.createStatement().execute(sql2);
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rs = conn.createStatement().executeQuery(SQL_SELECT_STAR);
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rs.next();
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assertEquals(rs.getInt("id"), 5);
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assertEquals(rs.getInt("year"), 400);
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assertNoMoreRows(rs);
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}
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/**
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* Alter type to column that does not exist
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*/
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@Test
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public void test_AlterType_NonExist() throws SQLException {
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String sql = "ALTER TABLE foo ALTER a TYPE int;";
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thrown.expect(PSQLException.class);
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conn.createStatement().execute(sql);
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}
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/**
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* Alter to an unsupported column type
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*/
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@Test
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public void test_AlterType_UnSupported() throws SQLException {
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String sql = "ALTER TABLE foo ALTER year TYPE non;";
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thrown.expect(PSQLException.class);
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conn.createStatement().execute(sql);
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}
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/**
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* Add columns, drop columns, change column type in one sql statement
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*/
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@Test
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public void test_MultiOperation() throws SQLException {
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String sql =
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"ALTER TABLE foo ADD month INT, DROP year, ALTER id TYPE float;";
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conn.createStatement().execute(sql);
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ResultSet rs = conn.createStatement().executeQuery(SQL_SELECT_STAR);
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rs.next();
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assertEquals(rs.getFloat("id"), 5, EPSILON);
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assertEquals(rs.getInt("month"), 0);
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assertNoMoreRows(rs);
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String sql2 = "INSERT INTO foo VALUES (4.5, 3);";
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conn.createStatement().execute(sql2);
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rs = conn.createStatement().executeQuery(SQL_SELECT_STAR);
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rs.next();
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assertEquals(rs.getFloat("id"), 5, EPSILON);
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assertEquals(rs.getInt("month"), 0);
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rs.next();
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assertEquals(rs.getFloat("id"), 4.5, EPSILON);
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assertEquals(rs.getInt("month"), 3);
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assertNoMoreRows(rs);
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}
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/**
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* If multiple operations in one statement failed, schema will not change
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*/
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@Test
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public void test_MultiOperationFailed() throws SQLException {
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String sql =
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"ALTER TABLE foo ADD month int, DROP month, ALTER year TYPE float;";
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thrown.expect(PSQLException.class);
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conn.createStatement().execute(sql);
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ResultSet rs = conn.createStatement().executeQuery(SQL_SELECT_STAR);
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rs.next();
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checkRow(rs,
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new String [] {"id", "year"},
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new int [] {5, 400});
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assertNoMoreRows(rs);
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}
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}

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