IGNITE-20465 *.mvccEnabled() removal

modules/clients/src/test/java/org/apache/ignite/jdbc/thin/JdbcThinConnectionSelfTest.java

@@ -74,7 +74,6 @@
 import static java.sql.Statement.RETURN_GENERATED_KEYS;
 import static org.apache.ignite.cache.query.SqlFieldsQuery.DFLT_LAZY;
 import static org.apache.ignite.configuration.ClientConnectorConfiguration.DFLT_PORT;
-import static org.apache.ignite.internal.processors.odbc.SqlStateCode.TRANSACTION_STATE_EXCEPTION;
 import static org.apache.ignite.testframework.GridTestUtils.assertThrows;
 import static org.apache.ignite.testframework.GridTestUtils.assertThrowsAnyCause;
 import static org.apache.ignite.testframework.GridTestUtils.getFieldValue;
@@ -1290,50 +1289,6 @@ public void testRollback() throws Exception {
         }
     }
 
-    /**
-     * @throws Exception if failed.
-     */
-    @Test
-    public void testBeginFails() throws Exception {
-        try (Connection conn = DriverManager.getConnection(urlWithPartitionAwarenessProp)) {
-            conn.createStatement().execute("BEGIN");
-
-            fail("Exception is expected");
-        }
-        catch (SQLException e) {
-            assertEquals(TRANSACTION_STATE_EXCEPTION, e.getSQLState());
-        }
-    }
-
-    /**
-     * @throws Exception if failed.
-     */
-    @Test
-    public void testCommitIgnored() throws Exception {
-        try (Connection conn = DriverManager.getConnection(urlWithPartitionAwarenessProp)) {
-            conn.setAutoCommit(false);
-            conn.createStatement().execute("COMMIT");
-
-            conn.commit();
-        }
-        // assert no exception
-    }
-
-    /**
-     * @throws Exception if failed.
-     */
-    @Test
-    public void testRollbackIgnored() throws Exception {
-        try (Connection conn = DriverManager.getConnection(urlWithPartitionAwarenessProp)) {
-            conn.setAutoCommit(false);
-
-            conn.createStatement().execute("ROLLBACK");
-
-            conn.rollback();
-        }
-        // assert no exception
-    }
-
     /**
      * @throws Exception If failed.
      */

modules/core/src/main/java/org/apache/ignite/internal/cache/query/index/sorted/inline/InlineIndexTree.java

@@ -154,7 +154,7 @@ public InlineIndexTree(
 
         this.idxRowCache = idxRowCache;
 
-        mvccEnabled = grpCtx.mvccEnabled();
+        mvccEnabled = false;
 
         if (!initNew) {
             // Init from metastore.

modules/core/src/main/java/org/apache/ignite/internal/processors/cache/CacheGroupContext.java

@@ -287,13 +287,6 @@ public CacheGroupContext(
         topValidators = Collections.unmodifiableCollection(topologyValidators(ccfg, ctx.kernalContext().plugins()));
     }
 
-    /**
-     * @return Mvcc flag.
-     */
-    public boolean mvccEnabled() {
-        return mvccEnabled;
-    }
-
     /**
      * @return {@code True} if this is cache group for one of system caches.
      */

modules/core/src/main/java/org/apache/ignite/internal/processors/cache/IgniteCacheOffheapManager.java

@@ -51,7 +51,6 @@
 import org.apache.ignite.internal.util.lang.GridIterator;
 import org.apache.ignite.internal.util.lang.IgniteInClosure2X;
 import org.apache.ignite.internal.util.lang.IgnitePredicateX;
-import org.apache.ignite.lang.IgniteBiTuple;
 import org.jetbrains.annotations.Nullable;
 
 /**
@@ -198,17 +197,6 @@ public void invoke(GridCacheContext cctx, KeyCacheObject key, GridDhtLocalPartit
     @Nullable public CacheDataRow mvccRead(GridCacheContext cctx, KeyCacheObject key, MvccSnapshot mvccSnapshot)
         throws IgniteCheckedException;
 
-    /**
-     * For testing only.
-     *
-     * @param cctx Cache context.
-     * @param key Key.
-     * @return All stored versions for given key.
-     * @throws IgniteCheckedException If failed.
-     */
-    public List<IgniteBiTuple<Object, MvccVersion>> mvccAllVersions(GridCacheContext cctx, KeyCacheObject key)
-        throws IgniteCheckedException;
-
     /**
      * Returns iterator over the all row versions for the given key.
      *
@@ -983,17 +971,6 @@ GridCursor<CacheDataRow> mvccAllVersionsCursor(GridCacheContext cctx, KeyCacheOb
         public CacheDataRow mvccFind(GridCacheContext cctx, KeyCacheObject key, MvccSnapshot snapshot)
             throws IgniteCheckedException;
 
-        /**
-         * For testing only.
-         *
-         * @param cctx Cache context.
-         * @param key Key.
-         * @return All stored versions for given key.
-         * @throws IgniteCheckedException If failed.
-         */
-        List<IgniteBiTuple<Object, MvccVersion>> mvccFindAllVersions(GridCacheContext cctx, KeyCacheObject key)
-            throws IgniteCheckedException;
-
         /**
          * @return Data cursor.
          * @throws IgniteCheckedException If failed.