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Use new func registry for temporal arithmetic functions.
- interval and timestamps
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100 changes: 100 additions & 0 deletions
100
sql/src/main/java/io/crate/expression/scalar/arithmetic/IntervalArithmeticScalar.java
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|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /* | ||
| * Licensed to Crate under one or more contributor license agreements. | ||
| * See the NOTICE file distributed with this work for additional | ||
| * information regarding copyright ownership. Crate 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. | ||
| * | ||
| * However, if you have executed another commercial license agreement | ||
| * with Crate these terms will supersede the license and you may use the | ||
| * software solely pursuant to the terms of the relevant commercial | ||
| * agreement. | ||
| */ | ||
|
|
||
| package io.crate.expression.scalar.arithmetic; | ||
|
|
||
| import io.crate.data.Input; | ||
| import io.crate.expression.scalar.ScalarFunctionModule; | ||
| import io.crate.metadata.FunctionIdent; | ||
| import io.crate.metadata.FunctionInfo; | ||
| import io.crate.metadata.Scalar; | ||
| import io.crate.metadata.TransactionContext; | ||
| import io.crate.metadata.functions.Signature; | ||
| import io.crate.types.DataTypes; | ||
| import org.joda.time.Period; | ||
|
|
||
| import java.util.List; | ||
| import java.util.function.BiFunction; | ||
|
|
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| public class IntervalArithmeticScalar extends Scalar<Period, Object> { | ||
|
|
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| public static void register(ScalarFunctionModule module) { | ||
| module.register( | ||
| Signature.scalar( | ||
| ArithmeticFunctions.Names.ADD, | ||
| DataTypes.INTERVAL.getTypeSignature(), | ||
| DataTypes.INTERVAL.getTypeSignature(), | ||
| DataTypes.INTERVAL.getTypeSignature() | ||
| ), | ||
| args -> new IntervalArithmeticScalar("+", ArithmeticFunctions.Names.ADD) | ||
| ); | ||
| module.register( | ||
| Signature.scalar( | ||
| ArithmeticFunctions.Names.SUBTRACT, | ||
| DataTypes.INTERVAL.getTypeSignature(), | ||
| DataTypes.INTERVAL.getTypeSignature(), | ||
| DataTypes.INTERVAL.getTypeSignature() | ||
| ), | ||
| args -> new IntervalArithmeticScalar("-", ArithmeticFunctions.Names.SUBTRACT) | ||
| ); | ||
| } | ||
|
|
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| private final FunctionInfo info; | ||
| private final BiFunction<Period, Period, Period> operation; | ||
|
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| IntervalArithmeticScalar(String operator, String name) { | ||
| info = new FunctionInfo( | ||
| new FunctionIdent( | ||
| name, | ||
| List.of(DataTypes.INTERVAL, DataTypes.INTERVAL)), | ||
| DataTypes.INTERVAL); | ||
|
|
||
| switch (operator) { | ||
| case "+": | ||
| operation = Period::plus; | ||
| break; | ||
| case "-": | ||
| operation = Period::minus; | ||
| break; | ||
| default: | ||
| operation = (a, b) -> { | ||
| throw new IllegalArgumentException("Unsupported operator for interval " + operator); | ||
| }; | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public FunctionInfo info() { | ||
| return this.info; | ||
| } | ||
|
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| @Override | ||
| public Period evaluate(TransactionContext txnCtx, Input<Object>[] args) { | ||
| Period fst = (Period) args[0].value(); | ||
| Period snd = (Period) args[1].value(); | ||
|
|
||
| if (fst == null || snd == null) { | ||
| return null; | ||
| } | ||
| return operation.apply(fst, snd); | ||
| } | ||
| } |
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