[FLINK-34556][table] Migrate EnumerableToLogicalTableScan to java

flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/rules/logical/EnumerableToLogicalTableScan.java

@@ -0,0 +1,70 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.flink.table.planner.plan.rules.logical;
+
+import org.apache.calcite.adapter.enumerable.EnumerableTableScan;
+import org.apache.calcite.plan.RelOptRuleCall;
+import org.apache.calcite.plan.RelOptTable;
+import org.apache.calcite.plan.RelRule;
+import org.apache.calcite.rel.core.TableScan;
+import org.apache.calcite.rel.logical.LogicalTableScan;
+import org.immutables.value.Value;
+
+/**
+ * Rule that converts an EnumerableTableScan into a LogicalTableScan. We need this rule because
+ * Calcite creates an EnumerableTableScan when parsing a SQL query. We convert it into a
+ * LogicalTableScan so we can merge the optimization process with any plan that might be created by
+ * the Table API.
+ */
+@Value.Enclosing
+public class EnumerableToLogicalTableScan
+        extends RelRule<EnumerableToLogicalTableScan.EnumerableToLogicalTableScanConfig> {
+
+    public static final EnumerableToLogicalTableScan INSTANCE =
+            EnumerableToLogicalTableScan.EnumerableToLogicalTableScanConfig.DEFAULT.toRule();
+
+    private EnumerableToLogicalTableScan(EnumerableToLogicalTableScanConfig config) {
+        super(config);
+    }
+
+    @Override
+    public void onMatch(RelOptRuleCall call) {
+        TableScan oldRel = call.rel(0);
+        RelOptTable table = oldRel.getTable();
+        LogicalTableScan newRel =
+                LogicalTableScan.create(oldRel.getCluster(), table, oldRel.getHints());
+        call.transformTo(newRel);
+    }
+
+    /** Rule configuration. */
+    @Value.Immutable(singleton = false)
+    public interface EnumerableToLogicalTableScanConfig extends RelRule.Config {
+        EnumerableToLogicalTableScan.EnumerableToLogicalTableScanConfig DEFAULT =
+                ImmutableEnumerableToLogicalTableScan.EnumerableToLogicalTableScanConfig.builder()
+                        .build()
+                        .withOperandSupplier(
+                                b0 -> b0.operand(EnumerableTableScan.class).anyInputs())
+                        .withDescription("EnumerableToLogicalTableScan");
+
+        @Override
+        default EnumerableToLogicalTableScan toRule() {
+            return new EnumerableToLogicalTableScan(this);
+        }
+    }
+}