/**
* 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.drill.exec.expr.fn.impl;
import org.apache.drill.exec.expr.DrillSimpleFunc;
import org.apache.drill.exec.expr.annotations.FunctionTemplate;
import org.apache.drill.exec.expr.annotations.Output;
import org.apache.drill.exec.expr.annotations.Param;
import org.apache.drill.exec.expr.annotations.FunctionTemplate.FunctionScope;
import org.apache.drill.exec.expr.holders.BigIntHolder;
import org.apache.drill.exec.expr.holders.Decimal18Holder;
import org.apache.drill.exec.expr.holders.Decimal28SparseHolder;
import org.apache.drill.exec.expr.holders.Decimal38SparseHolder;
import org.apache.drill.exec.expr.holders.Decimal9Holder;
import org.apache.drill.exec.expr.holders.Float4Holder;
import org.apache.drill.exec.expr.holders.Float8Holder;
import org.apache.drill.exec.expr.holders.IntHolder;
import org.apache.drill.exec.expr.holders.NullableBigIntHolder;
import org.apache.drill.exec.expr.holders.NullableDecimal18Holder;
import org.apache.drill.exec.expr.holders.NullableDecimal28SparseHolder;
import org.apache.drill.exec.expr.holders.NullableDecimal38SparseHolder;
import org.apache.drill.exec.expr.holders.NullableDecimal9Holder;
import org.apache.drill.exec.expr.holders.NullableFloat4Holder;
import org.apache.drill.exec.expr.holders.NullableFloat8Holder;
import org.apache.drill.exec.expr.holders.NullableIntHolder;
/*
* Class contains hash64 function definitions for different data types.
*
* NOTE: These functions are used internally by Drill to perform hash distribution and in hash join. For
* numeric data types we would like to apply implicit casts in the join method however for this to work
* as expected we would need to hash the same value represented in different data types (int, bigint, float etc)
* to hash to the same node, this is why we cast all numeric values to double before performing the actual hash.
*/
public class Hash64AsDouble {
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class NullableFloatHash implements DrillSimpleFunc {
@Param
NullableFloat4Holder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
if (in.isSet == 0) {
out.value = 0;
} else {
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64((double) in.value, 0);
}
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class FloatHash implements DrillSimpleFunc {
@Param
Float4Holder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64((double) in.value, 0);
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class NullableDoubleHash implements DrillSimpleFunc {
@Param
NullableFloat8Holder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
if (in.isSet == 0) {
out.value = 0;
} else {
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64((double) in.value, 0);
}
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class DoubleHash implements DrillSimpleFunc {
@Param
Float8Holder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64(in.value, 0);
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class NullableBigIntHash implements DrillSimpleFunc {
@Param
NullableBigIntHolder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
if (in.isSet == 0) {
out.value = 0;
} else {
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64((double) in.value, 0);
}
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class NullableIntHash implements DrillSimpleFunc {
@Param
NullableIntHolder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
if (in.isSet == 0) {
out.value = 0;
} else {
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64((double) in.value, 0);
}
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class BigIntHash implements DrillSimpleFunc {
@Param
BigIntHolder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64((double) in.value, 0);
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class IntHash implements DrillSimpleFunc {
@Param
IntHolder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
// TODO: implement hash function for other types
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64((double) in.value, 0);
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class Decimal9Hash implements DrillSimpleFunc {
@Param
Decimal9Holder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
java.math.BigDecimal input = new java.math.BigDecimal(java.math.BigInteger.valueOf(in.value), in.scale);
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64(input.doubleValue(), 0);
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class NullableDecimal9Hash implements DrillSimpleFunc {
@Param
NullableDecimal9Holder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
if (in.isSet == 0) {
out.value = 0;
} else {
java.math.BigDecimal input = new java.math.BigDecimal(java.math.BigInteger.valueOf(in.value), in.scale);
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64(input.doubleValue(), 0);
}
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class Decimal18Hash implements DrillSimpleFunc {
@Param
Decimal18Holder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
java.math.BigDecimal input = new java.math.BigDecimal(java.math.BigInteger.valueOf(in.value), in.scale);
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64(input.doubleValue(), 0);
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class NullableDecimal18Hash implements DrillSimpleFunc {
@Param
NullableDecimal18Holder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
if (in.isSet == 0) {
out.value = 0;
} else {
java.math.BigDecimal input = new java.math.BigDecimal(java.math.BigInteger.valueOf(in.value), in.scale);
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64(input.doubleValue(), 0);
}
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class Decimal28Hash implements DrillSimpleFunc {
@Param
Decimal28SparseHolder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
java.math.BigDecimal input = org.apache.drill.exec.util.DecimalUtility.getBigDecimalFromSparse(in.buffer,
in.start, in.nDecimalDigits, in.scale);
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64(input.doubleValue(), 0);
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class NullableDecimal28Hash implements DrillSimpleFunc {
@Param
NullableDecimal28SparseHolder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
if (in.isSet == 0) {
out.value = 0;
} else {
java.math.BigDecimal input = org.apache.drill.exec.util.DecimalUtility.getBigDecimalFromSparse(in.buffer,
in.start, in.nDecimalDigits, in.scale);
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64(input.doubleValue(), 0);
}
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class Decimal38Hash implements DrillSimpleFunc {
@Param
Decimal38SparseHolder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
java.math.BigDecimal input = org.apache.drill.exec.util.DecimalUtility.getBigDecimalFromSparse(in.buffer,
in.start, in.nDecimalDigits, in.scale);
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64(input.doubleValue(), 0);
}
}
@FunctionTemplate(name = "hash64AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class NullableDecimal38Hash implements DrillSimpleFunc {
@Param
NullableDecimal38SparseHolder in;
@Output
BigIntHolder out;
public void setup() {
}
public void eval() {
if (in.isSet == 0) {
out.value = 0;
} else {
java.math.BigDecimal input = org.apache.drill.exec.util.DecimalUtility.getBigDecimalFromSparse(in.buffer,
in.start, in.nDecimalDigits, in.scale);
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash64(input.doubleValue(), 0);
}
}
}
}