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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.
*/
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.VarDecimalHolder;
import org.apache.drill.exec.expr.holders.NullableVarDecimalHolder;
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.NullableFloat4Holder;
import org.apache.drill.exec.expr.holders.NullableFloat8Holder;
import org.apache.drill.exec.expr.holders.NullableIntHolder;
/**
* hash32 function definitions for numeric data types. These functions cast the input numeric value to a
* double before doing the hashing. See comments in {@link Hash64AsDouble} for the reason for doing this.
*/
@SuppressWarnings("unused")
public class Hash32AsDouble {
@FunctionTemplate(name = "hash32AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class NullableFloatHash implements DrillSimpleFunc {
@Param
NullableFloat4Holder in;
@Output
IntHolder 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.hash32(in.value, 0);
}
}
}
@FunctionTemplate(name = "hash32AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class FloatHash implements DrillSimpleFunc {
@Param
Float4Holder in;
@Output
IntHolder out;
public void setup() {
}
public void eval() {
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash32(in.value, 0);
}
}
@FunctionTemplate(name = "hash32AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class NullableDoubleHash implements DrillSimpleFunc {
@Param
NullableFloat8Holder in;
@Output
IntHolder 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.hash32(in.value, 0);
}
}
}
@FunctionTemplate(name = "hash32AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class DoubleHash implements DrillSimpleFunc {
@Param
Float8Holder in;
@Output
IntHolder out;
public void setup() {
}
public void eval() {
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash32(in.value, 0);
}
}
@FunctionTemplate(name = "hash32AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class NullableBigIntHash implements DrillSimpleFunc {
@Param
NullableBigIntHolder in;
@Output
IntHolder 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.hash32(in.value, 0);
}
}
}
@FunctionTemplate(name = "hash32AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class NullableIntHash implements DrillSimpleFunc {
@Param
NullableIntHolder in;
@Output
IntHolder 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.hash32(in.value, 0);
}
}
}
@FunctionTemplate(name = "hash32AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class BigIntHash implements DrillSimpleFunc {
@Param
BigIntHolder in;
@Output
IntHolder out;
public void setup() {
}
public void eval() {
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash32(in.value, 0);
}
}
@FunctionTemplate(name = "hash32AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class IntHash implements DrillSimpleFunc {
@Param
IntHolder in;
@Output
IntHolder out;
public void setup() {
}
public void eval() {
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash32(in.value, 0);
}
}
@FunctionTemplate(name = "hash32AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class VarDecimalHash implements DrillSimpleFunc {
@Param
VarDecimalHolder in;
@Output
IntHolder out;
public void setup() {
}
public void eval() {
java.math.BigDecimal input = org.apache.drill.exec.util.DecimalUtility.getBigDecimalFromDrillBuf(in.buffer,
in.start, in.end - in.start, in.scale);
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash32(input.doubleValue(), 0);
}
}
@FunctionTemplate(name = "hash32AsDouble", scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.INTERNAL)
public static class NullableVarDecimalHash implements DrillSimpleFunc {
@Param
NullableVarDecimalHolder in;
@Output
IntHolder 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.getBigDecimalFromDrillBuf(in.buffer,
in.start, in.end - in.start, in.scale);
out.value = org.apache.drill.exec.expr.fn.impl.HashHelper.hash32(input.doubleValue(), 0);
}
}
}
}
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