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111 changes: 111 additions & 0 deletions
111
core/src/main/java/io/questdb/griffin/engine/functions/groupby/FirstStrGroupByFunction.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| /******************************************************************************* | ||
| * ___ _ ____ ____ | ||
| * / _ \ _ _ ___ ___| |_| _ \| __ ) | ||
| * | | | | | | |/ _ \/ __| __| | | | _ \ | ||
| * | |_| | |_| | __/\__ \ |_| |_| | |_) | | ||
| * \__\_\\__,_|\___||___/\__|____/|____/ | ||
| * | ||
| * Copyright (c) 2014-2019 Appsicle | ||
| * Copyright (c) 2019-2023 QuestDB | ||
| * | ||
| * Licensed 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 io.questdb.griffin.engine.functions.groupby; | ||
|
|
||
| import io.questdb.cairo.ArrayColumnTypes; | ||
| import io.questdb.cairo.ColumnType; | ||
| import io.questdb.cairo.map.MapValue; | ||
| import io.questdb.cairo.sql.Function; | ||
| import io.questdb.cairo.sql.Record; | ||
| import io.questdb.griffin.engine.functions.GroupByFunction; | ||
| import io.questdb.griffin.engine.functions.StrFunction; | ||
| import io.questdb.griffin.engine.functions.UnaryFunction; | ||
| import io.questdb.std.str.StringSink; | ||
| import org.jetbrains.annotations.NotNull; | ||
|
|
||
| public class FirstStrGroupByFunction extends StrFunction implements GroupByFunction, UnaryFunction { | ||
| private final Function arg; | ||
| private final StringSink sink = new StringSink(); | ||
| private int valueIndex; | ||
|
|
||
| public FirstStrGroupByFunction(@NotNull Function arg) { | ||
| this.arg = arg; | ||
| } | ||
|
|
||
| @Override | ||
| public void clear() { | ||
| sink.clear(); | ||
| } | ||
|
|
||
| @Override | ||
| public CharSequence getStr(Record rec) { | ||
| boolean hasStr = rec.getBool(valueIndex); | ||
| return hasStr ? sink : null; | ||
| } | ||
|
|
||
| @Override | ||
| public CharSequence getStrB(Record rec) { | ||
| return getStr(rec); | ||
| } | ||
|
|
||
| @Override | ||
| public boolean isConstant() { | ||
| return false; | ||
| } | ||
|
|
||
| @Override | ||
| public boolean isScalar() { | ||
| return false; | ||
| } | ||
|
|
||
| @Override | ||
| public void pushValueTypes(ArrayColumnTypes columnTypes) { | ||
| this.valueIndex = columnTypes.getColumnCount(); | ||
| columnTypes.add(ColumnType.INT); | ||
| } | ||
|
|
||
| @Override | ||
| public void computeFirst(MapValue mapValue, Record record) { | ||
| CharSequence str = arg.getStr(record); | ||
| sink.clear(); | ||
| if (null != str) { | ||
| mapValue.putBool(this.valueIndex, true); | ||
| sink.put(str); | ||
| } else { | ||
| mapValue.putBool(this.valueIndex, false); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void computeNext(MapValue mapValue, Record record) { | ||
| // empty | ||
| } | ||
|
|
||
| @Override | ||
| public Function getArg() { | ||
| return this.arg; | ||
| } | ||
|
|
||
| @Override | ||
| public String getName() { | ||
| return "first"; | ||
| } | ||
|
|
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| @Override | ||
| public void setNull(MapValue mapValue) { | ||
| mapValue.putBool(valueIndex, false); | ||
| sink.clear(); | ||
| } | ||
| } |
49 changes: 49 additions & 0 deletions
49
...main/java/io/questdb/griffin/engine/functions/groupby/FirstStrGroupByFunctionFactory.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| /******************************************************************************* | ||
| * ___ _ ____ ____ | ||
| * / _ \ _ _ ___ ___| |_| _ \| __ ) | ||
| * | | | | | | |/ _ \/ __| __| | | | _ \ | ||
| * | |_| | |_| | __/\__ \ |_| |_| | |_) | | ||
| * \__\_\\__,_|\___||___/\__|____/|____/ | ||
| * | ||
| * Copyright (c) 2014-2019 Appsicle | ||
| * Copyright (c) 2019-2023 QuestDB | ||
| * | ||
| * Licensed 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 io.questdb.griffin.engine.functions.groupby; | ||
|
|
||
| import io.questdb.cairo.CairoConfiguration; | ||
| import io.questdb.cairo.sql.Function; | ||
| import io.questdb.griffin.FunctionFactory; | ||
| import io.questdb.griffin.SqlExecutionContext; | ||
| import io.questdb.std.IntList; | ||
| import io.questdb.std.ObjList; | ||
|
|
||
| public class FirstStrGroupByFunctionFactory implements FunctionFactory { | ||
| @Override | ||
| public String getSignature() { | ||
| return "first(S)"; | ||
| } | ||
|
|
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| @Override | ||
| public boolean isGroupBy() { | ||
| return true; | ||
| } | ||
|
|
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| @Override | ||
| public Function newInstance(int position, ObjList<Function> args, IntList argPositions, CairoConfiguration configuration, SqlExecutionContext sqlExecutionContext) { | ||
| return new FirstStrGroupByFunction(args.getQuick(0)); | ||
| } | ||
| } |
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