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TEIID-5459 adding long versions of count and ranking functions
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72 changes: 72 additions & 0 deletions
72
engine/src/main/java/org/teiid/query/function/aggregate/CountBig.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| /* | ||
| * Copyright Red Hat, Inc. and/or its affiliates | ||
| * and other contributors as indicated by the @author tags and | ||
| * the COPYRIGHT.txt file distributed with this work. | ||
| * | ||
| * 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 org.teiid.query.function.aggregate; | ||
|
|
||
| import java.util.Arrays; | ||
| import java.util.List; | ||
|
|
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| import org.teiid.core.TeiidComponentException; | ||
| import org.teiid.core.TeiidProcessingException; | ||
| import org.teiid.query.QueryPlugin; | ||
| import org.teiid.query.util.CommandContext; | ||
|
|
||
| /** | ||
| * Just a simple COUNT() implementation that counts every non-null row it sees. | ||
| */ | ||
| public class CountBig extends AggregateFunction { | ||
|
|
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| private long count = 0; | ||
|
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| public void reset() { | ||
| count = 0; | ||
| } | ||
|
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| @Override | ||
| public void addInputDirect(List<?> tuple, CommandContext commandContext) | ||
| throws TeiidComponentException, TeiidProcessingException { | ||
| if (count == Long.MAX_VALUE) { | ||
| throw new TeiidProcessingException(QueryPlugin.Event.TEIID31174, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID31174)); | ||
| } | ||
| count++; | ||
| } | ||
|
|
||
| /** | ||
| * @see org.teiid.query.function.aggregate.AggregateFunction#getResult(CommandContext) | ||
| */ | ||
| public Object getResult(CommandContext commandContext) { | ||
| return count; | ||
| } | ||
|
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| @Override | ||
| public void getState(List<Object> state) { | ||
| state.add(count); | ||
| } | ||
|
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| @Override | ||
| public int setState(List<?> state, int index) { | ||
| count = (Long) state.get(index); | ||
| return index++; | ||
| } | ||
|
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| @Override | ||
| public List<? extends Class<?>> getStateTypes() { | ||
| return Arrays.asList(Long.class); | ||
| } | ||
|
|
||
| } |
76 changes: 76 additions & 0 deletions
76
engine/src/main/java/org/teiid/query/function/aggregate/RankingFunctionBig.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| /* | ||
| * Copyright Red Hat, Inc. and/or its affiliates | ||
| * and other contributors as indicated by the @author tags and | ||
| * the COPYRIGHT.txt file distributed with this work. | ||
| * | ||
| * 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 org.teiid.query.function.aggregate; | ||
|
|
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| import java.util.List; | ||
|
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| import org.teiid.api.exception.query.ExpressionEvaluationException; | ||
| import org.teiid.api.exception.query.FunctionExecutionException; | ||
| import org.teiid.core.TeiidComponentException; | ||
| import org.teiid.query.QueryPlugin; | ||
| import org.teiid.query.sql.symbol.AggregateSymbol.Type; | ||
| import org.teiid.query.util.CommandContext; | ||
|
|
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| /** | ||
| * computes rank/dense_rank | ||
| */ | ||
| public class RankingFunctionBig extends AggregateFunction { | ||
|
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| private long count = 0; | ||
| private long lastCount = 0; | ||
| private Type type; | ||
|
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| public RankingFunctionBig(Type function) { | ||
| this.type = function; | ||
| } | ||
|
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| @Override | ||
| public void reset() { | ||
| count = 0; | ||
| lastCount = 0; | ||
| } | ||
|
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| @Override | ||
| public void addInputDirect(List<?> tuple, CommandContext commandContext) | ||
| throws FunctionExecutionException, ExpressionEvaluationException, | ||
| TeiidComponentException { | ||
| if (type == Type.RANK) { | ||
| if (count == Long.MAX_VALUE) { | ||
| throw new ExpressionEvaluationException(QueryPlugin.Event.TEIID31289, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID31289)); | ||
| } | ||
| count++; | ||
| } | ||
| } | ||
|
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| @Override | ||
| public Object getResult(CommandContext commandContext) throws FunctionExecutionException, | ||
| ExpressionEvaluationException, TeiidComponentException { | ||
| if (type == Type.DENSE_RANK) { | ||
| if (count == Long.MAX_VALUE) { | ||
| throw new ExpressionEvaluationException(QueryPlugin.Event.TEIID31289, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID31289)); | ||
| } | ||
| count++; | ||
| return count; | ||
| } | ||
| long result = ++lastCount; | ||
| lastCount = count; | ||
| return result; | ||
| } | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
|
|
@@ -586,4 +586,9 @@ public boolean isEnvAllowed() { | |
| return true; | ||
| } | ||
|
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| @Override | ||
| public boolean isLongRanks() { | ||
| return false; | ||
| } | ||
|
|
||
| } | ||
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