| /* |
| * 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); |
| } |
| } |
| } |
| } |