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[feature](Nereids) support binary arithmetic function (#18213)

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support binary arithmetic functions like:

add(op1, op2) -> op1 + op2
subtract(op1, op2) -> op1 - op2
multiply(op1, op2) -> op1 * op2
divide(op1, op2) -> op1 / op2
mod(op1, op2) -> op1 % op2
This commit is contained in:
mch_ucchi
2023-04-06 16:57:04 +08:00
committed by GitHub
parent 33ae4524ce
commit 981ead9032
3 changed files with 109 additions and 0 deletions
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63
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/analysis/ArithmeticFunctionBinder.java Normal file
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@ -0,0 +1,63 @@
// 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.doris.nereids.rules.analysis;
import org.apache.doris.nereids.trees.expressions.Add;
import org.apache.doris.nereids.trees.expressions.BitAnd;
import org.apache.doris.nereids.trees.expressions.BitNot;
import org.apache.doris.nereids.trees.expressions.BitOr;
import org.apache.doris.nereids.trees.expressions.BitXor;
import org.apache.doris.nereids.trees.expressions.Divide;
import org.apache.doris.nereids.trees.expressions.Expression;
import org.apache.doris.nereids.trees.expressions.IntegralDivide;
import org.apache.doris.nereids.trees.expressions.Mod;
import org.apache.doris.nereids.trees.expressions.Multiply;
import org.apache.doris.nereids.trees.expressions.Subtract;
import org.apache.doris.nereids.trees.expressions.literal.NullLiteral;
import com.google.common.collect.ImmutableMap;
import java.util.List;
import java.util.Map;
/**
* bind arithmetic function
*/
public class ArithmeticFunctionBinder {
private static final NullLiteral DUMMY_EXPRESSION = new NullLiteral();
private static final Map<String, Expression> FUNCTION_TO_EXPRESSION = ImmutableMap.<String, Expression>builder()
.put("add", new Add(DUMMY_EXPRESSION, DUMMY_EXPRESSION))
.put("subtract", new Subtract(DUMMY_EXPRESSION, DUMMY_EXPRESSION))
.put("multiply", new Multiply(DUMMY_EXPRESSION, DUMMY_EXPRESSION))
.put("divide", new Divide(DUMMY_EXPRESSION, DUMMY_EXPRESSION))
.put("int_divide", new IntegralDivide(DUMMY_EXPRESSION, DUMMY_EXPRESSION))
.put("mod", new Mod(DUMMY_EXPRESSION, DUMMY_EXPRESSION))
.put("bitand", new BitAnd(DUMMY_EXPRESSION, DUMMY_EXPRESSION))
.put("bitor", new BitOr(DUMMY_EXPRESSION, DUMMY_EXPRESSION))
.put("bitxor", new BitXor(DUMMY_EXPRESSION, DUMMY_EXPRESSION))
.put("bitnot", new BitNot(DUMMY_EXPRESSION))
.build();
public boolean isBinaryArithmetic(String functionName) {
return FUNCTION_TO_EXPRESSION.containsKey(functionName.toLowerCase());
}
public Expression bindBinaryArithmetic(String functionName, List<Expression> children) {
return FUNCTION_TO_EXPRESSION.get(functionName.toLowerCase()).withChildren(children);
}
}

8
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/analysis/FunctionBinder.java
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@ -96,6 +96,14 @@ public class FunctionBinder extends DefaultExpressionRewriter<CascadesContext> {
.build()
: (List) unboundFunction.getArguments();
// we will change arithmetic function like add(), subtract(), bitnot() to the corresponding objects rather than
// BoundFunction.
ArithmeticFunctionBinder functionBinder = new ArithmeticFunctionBinder();
if (functionBinder.isBinaryArithmetic(unboundFunction.getName())) {
return functionBinder.bindBinaryArithmetic(unboundFunction.getName(), unboundFunction.children())
.accept(this, context);
}
FunctionBuilder builder = functionRegistry.findFunctionBuilder(functionName, arguments);
BoundFunction boundFunction = builder.build(functionName, arguments);
return TypeCoercionUtils.processBoundFunction(boundFunction);