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[feature](nereids) add variance function for nereids (#15370)

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support variance function. currently, it dose not support decimalV3 type
This commit is contained in:
minghong
2022-12-29 18:33:52 +08:00
committed by GitHub
parent 43c8e7b465
commit e651a9bb11
5 changed files with 126 additions and 5 deletions
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13
fe/fe-core/src/main/java/org/apache/doris/catalog/BuiltinAggregateFunctions.java
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@ -34,6 +34,7 @@ import org.apache.doris.nereids.trees.expressions.functions.agg.Max;
import org.apache.doris.nereids.trees.expressions.functions.agg.Min;
import org.apache.doris.nereids.trees.expressions.functions.agg.Ndv;
import org.apache.doris.nereids.trees.expressions.functions.agg.Sum;
import org.apache.doris.nereids.trees.expressions.functions.agg.Variance;
import com.google.common.collect.ImmutableList;
@ -45,23 +46,25 @@ import com.google.common.collect.ImmutableList;
*/
public class BuiltinAggregateFunctions implements FunctionHelper {
public final ImmutableList<AggregateFunc> aggregateFunctions = ImmutableList.of(
agg(ApproxCountDistinct.class, "approx_count_distinct"),
agg(Avg.class),
agg(BitmapIntersect.class, "bitmap_intersect"),
agg(BitmapUnion.class, "bitmap_union"),
agg(BitmapUnionCount.class, "bitmap_union_count"),
agg(BitmapUnionInt.class, "bitmap_union_int"),
agg(Count.class),
agg(GroupBitAnd.class, "group_bit_and"),
agg(GroupBitmapXor.class, "group_bitmap_xor"),
agg(GroupBitOr.class, "group_bit_or"),
agg(GroupBitXor.class, "group_bit_xor"),
agg(HllUnion.class, "hll_union", "hll_raw_agg"),
agg(HllUnionAgg.class, "hll_union_agg"),
agg(Max.class),
agg(Min.class),
agg(Sum.class),
agg(GroupBitAnd.class, "group_bit_and"),
agg(GroupBitOr.class, "group_bit_or"),
agg(GroupBitXor.class, "group_bit_xor"),
agg(Ndv.class),
agg(ApproxCountDistinct.class, "approx_count_distinct")
agg(Sum.class),
agg(Variance.class, "variance")
);
public static final BuiltinAggregateFunctions INSTANCE = new BuiltinAggregateFunctions();

86
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/agg/Variance.java Normal file
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@ -0,0 +1,86 @@
// 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.trees.expressions.functions.agg;
import org.apache.doris.catalog.FunctionSignature;
import org.apache.doris.nereids.trees.expressions.Expression;
import org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature;
import org.apache.doris.nereids.trees.expressions.functions.PropagateNullable;
import org.apache.doris.nereids.trees.expressions.shape.UnaryExpression;
import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
import org.apache.doris.nereids.types.BigIntType;
import org.apache.doris.nereids.types.DecimalV2Type;
import org.apache.doris.nereids.types.DoubleType;
import org.apache.doris.nereids.types.FloatType;
import org.apache.doris.nereids.types.IntegerType;
import org.apache.doris.nereids.types.LargeIntType;
import org.apache.doris.nereids.types.SmallIntType;
import org.apache.doris.nereids.types.TinyIntType;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import java.util.List;
/**
* Variance function
*/
public class Variance extends AggregateFunction implements UnaryExpression, PropagateNullable,
ExplicitlyCastableSignature {
public static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
FunctionSignature.ret(DoubleType.INSTANCE).args(DoubleType.INSTANCE),
FunctionSignature.ret(DoubleType.INSTANCE).args(FloatType.INSTANCE),
FunctionSignature.ret(DoubleType.INSTANCE).args(LargeIntType.INSTANCE),
FunctionSignature.ret(DoubleType.INSTANCE).args(BigIntType.INSTANCE),
FunctionSignature.ret(DoubleType.INSTANCE).args(SmallIntType.INSTANCE),
FunctionSignature.ret(DoubleType.INSTANCE).args(IntegerType.INSTANCE),
FunctionSignature.ret(DoubleType.INSTANCE).args(TinyIntType.INSTANCE),
FunctionSignature.ret(DecimalV2Type.SYSTEM_DEFAULT).args(DecimalV2Type.SYSTEM_DEFAULT)
);
public Variance(Expression child) {
super("variance", child);
}
public Variance(boolean isDistinct, Expression child) {
super("variance", isDistinct, child);
}
@Override
public List<FunctionSignature> getSignatures() {
return SIGNATURES;
}
@Override
public AggregateFunction withChildren(List<Expression> children) {
Preconditions.checkArgument(children.size() == 1);
return new Variance(isDistinct, children.get(0));
}
@Override
public AggregateFunction withDistinctAndChildren(boolean isDistinct, List<Expression> children) {
Preconditions.checkArgument(children.size() == 1);
return new Variance(isDistinct, children.get(0));
}
@Override
public <R, C> R accept(ExpressionVisitor<R, C> visitor, C context) {
return visitor.visitVariance(this, context);
}
}

5
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/visitor/AggregateFunctionVisitor.java
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@ -33,6 +33,7 @@ import org.apache.doris.nereids.trees.expressions.functions.agg.MultiDistinctCou
import org.apache.doris.nereids.trees.expressions.functions.agg.MultiDistinctSum;
import org.apache.doris.nereids.trees.expressions.functions.agg.Ndv;
import org.apache.doris.nereids.trees.expressions.functions.agg.Sum;
import org.apache.doris.nereids.trees.expressions.functions.agg.Variance;
/** AggregateFunctionVisitor. */
public interface AggregateFunctionVisitor<R, C> {
@ -82,6 +83,10 @@ public interface AggregateFunctionVisitor<R, C> {
return visitAggregateFunction(bitmapUnionCount, context);
}
default R visitVariance(Variance variance, C context) {
return visitAggregateFunction(variance, context);
}
default R visitNdv(Ndv ndv, C context) {
return visitAggregateFunction(ndv, context);
}