com.hazelcast.org.apache.calcite.rex.RexToSqlNodeConverter Maven / Gradle / Ivy
/*
* 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 com.hazelcast.com.liance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.com.hazelcast.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.rex;
import com.hazelcast.org.apache.calcite.sql.SqlIdentifier;
import com.hazelcast.org.apache.calcite.sql.SqlLiteral;
import com.hazelcast.org.apache.calcite.sql.SqlNode;
/**
* Converts expressions from {@link RexNode} to {@link SqlNode}.
*
* For most purposes, {@link com.hazelcast.org.apache.calcite.rel.rel2sql.SqlImplementor}
* is superior. See in particular
* {@link com.hazelcast.org.apache.calcite.rel.rel2sql.SqlImplementor.Context#toSql(RexProgram, RexNode)}.
*/
public interface RexToSqlNodeConverter {
//~ Methods ----------------------------------------------------------------
/**
* Converts a {@link RexNode} to a {@link SqlNode} expression,
* typically by dispatching to one of the other interface methods.
*
* @param node RexNode to translate
* @return SqlNode, or null if no translation was available
*/
SqlNode convertNode(RexNode node);
/**
* Converts a {@link RexCall} to a {@link SqlNode} expression.
*
* @param call RexCall to translate
* @return SqlNode, or null if no translation was available
*/
SqlNode convertCall(RexCall call);
/**
* Converts a {@link RexLiteral} to a {@link SqlLiteral}.
*
* @param literal RexLiteral to translate
* @return SqlNode, or null if no translation was available
*/
SqlNode convertLiteral(RexLiteral literal);
/**
* Converts a {@link RexInputRef} to a {@link SqlIdentifier}.
*
* @param ref RexInputRef to translate
* @return SqlNode, or null if no translation was available
*/
SqlNode convertInputRef(RexInputRef ref);
}