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[Gluten-core] Add struct literal support (facebookincubator#1048)
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gluten-core/src/main/java/io/glutenproject/substrait/expression/BinaryStructNode.java
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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. | ||
*/ | ||
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package io.glutenproject.substrait.expression; | ||
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import com.google.protobuf.ByteString; | ||
import io.substrait.proto.Expression; | ||
import org.apache.spark.sql.types.StructType; | ||
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import java.io.Serializable; | ||
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public class BinaryStructNode implements ExpressionNode, Serializable { | ||
// first is index, second is value | ||
private final byte[][] values; | ||
private final StructType type; | ||
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public BinaryStructNode(byte[][] values, StructType type) { | ||
this.values = values; | ||
this.type = type; | ||
} | ||
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public ExpressionNode getFieldLiteral(int index) { | ||
return ExpressionBuilder.makeLiteral(values[index], type.fields()[index].dataType(), | ||
type.fields()[index].nullable()); | ||
} | ||
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@Override | ||
public Expression toProtobuf() { | ||
Expression.Literal.Struct.Builder structBuilder = Expression.Literal.Struct.newBuilder(); | ||
Expression.Literal.Builder literalBuilder = Expression.Literal.newBuilder(); | ||
for (byte[] value : values) { | ||
// TODO, here we copy the binary literal, if it is long such as BloomFilter binary, | ||
// it will cost much time | ||
literalBuilder.setBinary(ByteString.copyFrom(value)); | ||
structBuilder.addFields(literalBuilder); | ||
} | ||
literalBuilder.setStruct(structBuilder.build()); | ||
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Expression.Builder builder = Expression.newBuilder(); | ||
builder.setLiteral(literalBuilder.build()); | ||
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return builder.build(); | ||
} | ||
} | ||
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