| /* |
| * 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. |
| */ |
| <@pp.dropOutputFile /> |
| |
| |
| |
| <#list aggrtypes1.aggrtypes as aggrtype> |
| <@pp.changeOutputFile name="/org/apache/drill/exec/expr/fn/impl/gaggr/${aggrtype.className}VarBytesFunctions.java" /> |
| |
| <#include "/@includes/license.ftl" /> |
| |
| |
| <#-- A utility class that is used to generate java code for aggr functions that maintain a single --> |
| <#-- running counter to hold the result. This includes: MIN, MAX, COUNT. --> |
| |
| package org.apache.drill.exec.expr.fn.impl.gaggr; |
| |
| <#include "/@includes/vv_imports.ftl" /> |
| |
| import org.apache.drill.exec.expr.DrillAggFunc; |
| import org.apache.drill.exec.expr.annotations.FunctionTemplate; |
| import org.apache.drill.exec.expr.annotations.FunctionTemplate.FunctionScope; |
| import org.apache.drill.exec.expr.annotations.FunctionTemplate.ReturnType; |
| import org.apache.drill.exec.expr.annotations.Output; |
| import org.apache.drill.exec.expr.annotations.Param; |
| import org.apache.drill.exec.expr.annotations.Workspace; |
| import org.apache.drill.exec.expr.fn.impl.ByteFunctionHelpers; |
| import org.apache.drill.exec.expr.holders.*; |
| import javax.inject.Inject; |
| import org.apache.drill.exec.record.RecordBatch; |
| |
| import io.netty.buffer.ByteBuf; |
| |
| /* |
| * This class is generated using freemarker and the ${.template_name} template. |
| */ |
| @SuppressWarnings("unused") |
| |
| public class ${aggrtype.className}VarBytesFunctions { |
| |
| <#list aggrtype.types as type> |
| <#if type.major == "VarBytes"> |
| |
| @FunctionTemplate(name = "${aggrtype.funcName}", |
| <#if type.inputType.contains("VarChar")> |
| returnType = ReturnType.SAME_IN_OUT_LENGTH, |
| </#if> |
| scope = FunctionTemplate.FunctionScope.POINT_AGGREGATE) |
| public static class ${type.inputType}${aggrtype.className} implements DrillAggFunc{ |
| |
| @Param ${type.inputType}Holder in; |
| @Workspace ObjectHolder value; |
| @Workspace UInt1Holder init; |
| @Workspace BigIntHolder nonNullCount; |
| @Inject DrillBuf buf; |
| @Output ${type.outputType}Holder out; |
| |
| public void setup() { |
| init = new UInt1Holder(); |
| nonNullCount = new BigIntHolder(); |
| nonNullCount.value = 0; |
| init.value = 0; |
| value = new ObjectHolder(); |
| org.apache.drill.exec.expr.fn.impl.DrillByteArray tmp = new org.apache.drill.exec.expr.fn.impl.DrillByteArray(); |
| value.obj = tmp; |
| } |
| |
| @Override |
| public void add() { |
| <#if type.inputType?starts_with("Nullable")> |
| sout: { |
| if (in.isSet == 0) { |
| // processing nullable input and the value is null, so don't do anything... |
| break sout; |
| } |
| </#if> |
| <#if aggrtype.className == "AnyValue" || aggrtype.className == "SingleValue"> |
| if (nonNullCount.value == 0) { |
| nonNullCount.value = 1; |
| int inputLength = in.end - in.start; |
| org.apache.drill.exec.expr.fn.impl.DrillByteArray tmp = (org.apache.drill.exec.expr.fn.impl.DrillByteArray) value.obj; |
| byte[] tempArray = new byte[inputLength]; |
| in.buffer.getBytes(in.start, tempArray, 0, inputLength); |
| tmp.setBytes(tempArray); |
| <#if aggrtype.className == "SingleValue"> |
| } else { |
| throw org.apache.drill.common.exceptions.UserException.functionError() |
| .message("Input for single_value function has more than one row") |
| .build(); |
| </#if> |
| } |
| <#else> |
| nonNullCount.value = 1; |
| org.apache.drill.exec.expr.fn.impl.DrillByteArray tmp = (org.apache.drill.exec.expr.fn.impl.DrillByteArray) value.obj; |
| int cmp = 0; |
| boolean swap = false; |
| |
| // if buffer is null then swap |
| if (init.value == 0) { |
| init.value = 1; |
| swap = true; |
| } else { |
| // Compare the bytes |
| cmp = org.apache.drill.exec.expr.fn.impl.ByteFunctionHelpers.compare(in.buffer, in.start, in.end, tmp.getBytes(), 0, tmp.getLength()); |
| |
| |
| <#if aggrtype.className == "Min"> |
| swap = (cmp == -1); |
| <#elseif aggrtype.className == "Max"> |
| swap = (cmp == 1); |
| </#if> |
| } |
| if (swap) { |
| int inputLength = in.end - in.start; |
| if (tmp.getLength() >= inputLength) { |
| in.buffer.getBytes(in.start, tmp.getBytes(), 0, inputLength); |
| tmp.setLength(inputLength); |
| } else { |
| byte[] tempArray = new byte[in.end - in.start]; |
| in.buffer.getBytes(in.start, tempArray, 0, in.end - in.start); |
| tmp.setBytes(tempArray); |
| } |
| } |
| </#if> |
| <#if type.inputType?starts_with("Nullable")> |
| } // end of sout block |
| </#if> |
| } |
| |
| @Override |
| public void output() { |
| if (nonNullCount.value > 0) { |
| out.isSet = 1; |
| org.apache.drill.exec.expr.fn.impl.DrillByteArray tmp = (org.apache.drill.exec.expr.fn.impl.DrillByteArray) value.obj; |
| buf = buf.reallocIfNeeded(tmp.getLength()); |
| buf.setBytes(0, tmp.getBytes(), 0, tmp.getLength()); |
| out.start = 0; |
| out.end = tmp.getLength(); |
| out.buffer = buf; |
| } else { |
| out.isSet = 0; |
| } |
| } |
| |
| @Override |
| public void reset() { |
| value = new ObjectHolder(); |
| value.obj = new org.apache.drill.exec.expr.fn.impl.DrillByteArray(); |
| init.value = 0; |
| nonNullCount.value = 0; |
| } |
| } |
| </#if> |
| </#list> |
| } |
| </#list> |