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89 changes: 89 additions & 0 deletions
89
...c/main/java/org/apache/doris/nereids/trees/expressions/functions/agg/LinearHistogram.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 org.apache.doris.nereids.trees.expressions.functions.agg; | ||
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| import org.apache.doris.catalog.FunctionSet; | ||
| import org.apache.doris.catalog.FunctionSignature; | ||
| import org.apache.doris.nereids.trees.expressions.Expression; | ||
| import org.apache.doris.nereids.trees.expressions.functions.AlwaysNotNullable; | ||
| import org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature; | ||
| import org.apache.doris.nereids.trees.expressions.functions.SearchSignature; | ||
| import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor; | ||
| import org.apache.doris.nereids.types.DoubleType; | ||
| import org.apache.doris.nereids.types.VarcharType; | ||
| import org.apache.doris.nereids.types.coercion.AnyDataType; | ||
| import org.apache.doris.nereids.types.coercion.PrimitiveType; | ||
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| import com.google.common.collect.ImmutableList; | ||
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| import java.util.List; | ||
|
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| /** | ||
| * AggregateFunction 'linear_histogram'. | ||
| */ | ||
| public class LinearHistogram extends AggregateFunction implements ExplicitlyCastableSignature, AlwaysNotNullable { | ||
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| public static final List<FunctionSignature> SIGNATURES = ImmutableList.of( | ||
| FunctionSignature.ret(VarcharType.SYSTEM_DEFAULT) | ||
| .args(AnyDataType.INSTANCE_WITHOUT_INDEX, DoubleType.INSTANCE), | ||
| FunctionSignature.ret(VarcharType.SYSTEM_DEFAULT) | ||
| .args(AnyDataType.INSTANCE_WITHOUT_INDEX, DoubleType.INSTANCE, DoubleType.INSTANCE) | ||
| ); | ||
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| private LinearHistogram(boolean distinct, List<Expression> args) { | ||
| super(FunctionSet.LINEAR_HISTOGRAM, distinct, args); | ||
| } | ||
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| public LinearHistogram(Expression arg0, Expression arg1) { | ||
| super(FunctionSet.LINEAR_HISTOGRAM, arg0, arg1); | ||
| } | ||
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| public LinearHistogram(Expression arg0, Expression arg1, Expression arg2) { | ||
| super(FunctionSet.LINEAR_HISTOGRAM, arg0, arg1, arg2); | ||
| } | ||
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| public LinearHistogram(boolean distinct, Expression arg0, Expression arg1) { | ||
| super(FunctionSet.LINEAR_HISTOGRAM, distinct, arg0, arg1); | ||
| } | ||
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| public LinearHistogram(boolean distinct, Expression arg0, Expression arg1, Expression arg2) { | ||
| super(FunctionSet.LINEAR_HISTOGRAM, distinct, arg0, arg1, arg2); | ||
| } | ||
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| @Override | ||
| public void checkLegalityBeforeTypeCoercion() { | ||
| if (!(child(0).getDataType() instanceof PrimitiveType)) { | ||
| SearchSignature.throwCanNotFoundFunctionException(this.getName(), getArguments()); | ||
| } | ||
| } | ||
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| @Override | ||
| public AggregateFunction withDistinctAndChildren(boolean distinct, List<Expression> children) { | ||
| return new LinearHistogram(distinct, children); | ||
| } | ||
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| @Override | ||
| public <R, C> R accept(ExpressionVisitor<R, C> visitor, C context) { | ||
| return visitor.visitLinearHistogram(this, context); | ||
| } | ||
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| @Override | ||
| public List<FunctionSignature> getSignatures() { | ||
| return SIGNATURES; | ||
| } | ||
| } |
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