PLAT-6829 Change driver to treat BIT as bytes

Summary: Change driver to treat BIT as bytes

Test Plan: https://app.circleci.com/pipelines/github/memsql/S2-JDBC-Connector/334/workflows/cbd8eb88-0c9d-4584-ab4e-ab427f4bebd0/jobs/1601

Reviewers: amakarovych-ua, pmishchenko-ua

Reviewed By: pmishchenko-ua

Subscribers: adam, engineering-list

JIRA Issues: PLAT-6829

Differential Revision: https://grizzly.internal.memcompute.com/D65359

src/main/java/com/singlestore/jdbc/message/server/ColumnDefinitionPacket.java

@@ -404,7 +404,7 @@ public int getColumnType(Configuration conf) {
         return isSigned() ? Types.TINYINT : Types.SMALLINT;
       case BIT:
         if (length == 1) {
-          return Types.BOOLEAN;
+          return Types.BIT;
         }
         return Types.VARBINARY;
       case SMALLINT:
@@ -466,9 +466,6 @@ public Codec<?> getDefaultCodec(Configuration conf) {
         }
         return isSigned() ? ByteCodec.INSTANCE : ShortCodec.INSTANCE;
       case BIT:
-        if (length == 1) {
-          return BooleanCodec.INSTANCE;
-        }
         return BitSetCodec.INSTANCE;
       case SMALLINT:
         return isSigned() ? ShortCodec.INSTANCE : IntCodec.INSTANCE;

src/test/java/com/singlestore/jdbc/integration/codec/BitCodecTest.java

@@ -79,7 +79,7 @@ public void getObjectPrepare() throws SQLException {
   }
 
   public void getObject(ResultSet rs) throws SQLException {
-    assertEquals(false, rs.getObject(1));
+    assertEquals(BitSet.valueOf(new byte[] {(byte) 0}), rs.getObject(1));
     assertFalse(rs.wasNull());
     assertEquals(BitSet.valueOf(new byte[] {(byte) 1}), rs.getObject(2));
     assertEquals(BitSet.valueOf(new byte[] {(byte) 1}), rs.getObject("t2alias"));
@@ -662,10 +662,10 @@ public void getMetaData() throws SQLException {
     ResultSetMetaData meta = rs.getMetaData();
     assertEquals("BIT", meta.getColumnTypeName(1));
     assertEquals(sharedConn.getCatalog(), meta.getCatalogName(1));
-    assertEquals("java.lang.Boolean", meta.getColumnClassName(1));
+    assertEquals("java.util.BitSet", meta.getColumnClassName(1));
     assertEquals("t1alias", meta.getColumnLabel(1));
     assertEquals("t1", meta.getColumnName(1));
-    assertEquals(Types.BOOLEAN, meta.getColumnType(1));
+    assertEquals(Types.BIT, meta.getColumnType(1));
     assertEquals(4, meta.getColumnCount());
     assertEquals(1, meta.getPrecision(1));
     assertEquals(0, meta.getScale(1));