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SQL Parser and Optimizer

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/*
 * 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 com.hazelcast.org.apache.calcite.sql2rel;

import com.hazelcast.org.apache.calcite.sql.SqlCall;

import com.hazelcast.org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Collection of {@link SqlRexConvertlet}s.
 */
public interface SqlRexConvertletTable {
  //~ Methods ----------------------------------------------------------------

  /**
   * Returns the convertlet applicable to a given expression.
   */
  @Nullable SqlRexConvertlet get(SqlCall call);
}