Allow binding JdbcMetadata

plugin/trino-base-jdbc/src/main/java/io/trino/plugin/jdbc/DefaultJdbcMetadataFactory.java

@@ -0,0 +1,56 @@
+/*
+ * Licensed 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 io.trino.plugin.jdbc;
+
+import io.airlift.units.Duration;
+
+import javax.inject.Inject;
+
+import java.util.Set;
+
+import static java.util.Objects.requireNonNull;
+import static java.util.concurrent.TimeUnit.DAYS;
+
+public class DefaultJdbcMetadataFactory
+        implements JdbcMetadataFactory
+{
+    private final JdbcClient jdbcClient;
+    private final boolean allowDropTable;
+
+    @Inject
+    public DefaultJdbcMetadataFactory(JdbcClient jdbcClient, JdbcMetadataConfig config)
+    {
+        this.jdbcClient = requireNonNull(jdbcClient, "jdbcClient is null");
+        requireNonNull(config, "config is null");
+        this.allowDropTable = config.isAllowDropTable();
+    }
+
+    @Override
+    public JdbcMetadata create(JdbcTransactionHandle transaction)
+    {
+        // Session stays the same per transaction, therefore session properties don't need to
+        // be a part of cache keys in CachingJdbcClient.
+        return create(new CachingJdbcClient(
+                        jdbcClient,
+                        Set.of(),
+                        new SingletonJdbcIdentityCacheMapping(),
+                        new Duration(1, DAYS), true),
+                allowDropTable);
+    }
+
+    protected JdbcMetadata create(JdbcClient transactionCachingJdbcClient, boolean allowDropTable)
+    {
+        return new DefaultJdbcMetadata(transactionCachingJdbcClient, allowDropTable);
+    }
+}

plugin/trino-base-jdbc/src/main/java/io/trino/plugin/jdbc/JdbcConnector.java

@@ -97,7 +97,7 @@ public ConnectorTransactionHandle beginTransaction(IsolationLevel isolationLevel
     {
         checkConnectorSupports(READ_COMMITTED, isolationLevel);
         JdbcTransactionHandle transaction = new JdbcTransactionHandle();
-        transactions.put(transaction, jdbcMetadataFactory.create());
+        transactions.put(transaction, jdbcMetadataFactory.create(transaction));
         return transaction;
     }