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This module contains the Table/SQL API for writing table programs
within the table ecosystem using the Java programming language.
/*
* 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.expressions.resolver;
import org.apache.flink.annotation.Internal;
import org.apache.flink.table.api.ValidationException;
import org.apache.flink.table.expressions.ResolvedExpression;
import org.apache.flink.table.types.logical.LogicalType;
import org.apache.flink.table.types.logical.RowType;
import javax.annotation.Nullable;
/** Translates a SQL expression string into a {@link ResolvedExpression}. */
@Internal
public interface SqlExpressionResolver {
/** Translates the given SQL expression string or throws a {@link ValidationException}. */
ResolvedExpression resolveExpression(
String sqlExpression, RowType inputRowType, @Nullable LogicalType outputType);
}