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TEIID-5740 adding support for explain
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130 changes: 130 additions & 0 deletions
130
engine/src/main/java/org/teiid/query/sql/lang/ExplainCommand.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
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| package org.teiid.query.sql.lang; | ||
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| import java.util.Arrays; | ||
| import java.util.List; | ||
| import java.util.Objects; | ||
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| import org.teiid.core.types.DataTypeManager.DefaultDataClasses; | ||
| import org.teiid.query.sql.LanguageVisitor; | ||
| import org.teiid.query.sql.symbol.ElementSymbol; | ||
| import org.teiid.query.sql.symbol.Expression; | ||
|
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| public class ExplainCommand extends Command { | ||
|
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| public enum Format { | ||
| TEXT, | ||
| XML, | ||
| YAML | ||
| } | ||
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| private Format format; | ||
| private Boolean analyze; | ||
| private Command command; | ||
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| @Override | ||
| public void acceptVisitor(LanguageVisitor visitor) { | ||
| visitor.visit(this); | ||
| } | ||
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| @Override | ||
| public int getType() { | ||
| return Command.TYPE_EXPLAIN; | ||
| } | ||
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| @Override | ||
| public ExplainCommand clone() { | ||
| ExplainCommand clone = new ExplainCommand(); | ||
| clone.setFormat(format); | ||
| clone.setAnalyze(analyze); | ||
| if (command != null) { | ||
| clone.setCommand((Command) command.clone()); | ||
| } | ||
| return clone; | ||
| } | ||
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| @Override | ||
| public List<Expression> getProjectedSymbols() { | ||
| Class<?> type = DefaultDataClasses.CLOB; | ||
| if (format == Format.XML) { | ||
| type = DefaultDataClasses.XML; | ||
| } | ||
| ElementSymbol symbol = new ElementSymbol("QUERY PLAN"); //$NON-NLS-1$ | ||
| symbol.setType(type); | ||
| return Arrays.asList(symbol); | ||
| } | ||
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| @Override | ||
| public boolean areResultsCachable() { | ||
| return false; | ||
| } | ||
|
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| public Format getFormat() { | ||
| return format; | ||
| } | ||
|
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| public void setFormat(Format format) { | ||
| this.format = format; | ||
| } | ||
|
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| public Boolean getAnalyze() { | ||
| return analyze; | ||
| } | ||
|
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| public void setAnalyze(Boolean analyze) { | ||
| this.analyze = analyze; | ||
| } | ||
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| public Command getCommand() { | ||
| return command; | ||
| } | ||
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| public void setCommand(Command command) { | ||
| this.command = command; | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(analyze, command, format); | ||
| } | ||
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| @Override | ||
| public boolean equals(Object obj) { | ||
| if (this == obj) { | ||
| return true; | ||
| } | ||
| if (obj == null) { | ||
| return false; | ||
| } | ||
| if (getClass() != obj.getClass()) { | ||
| return false; | ||
| } | ||
| ExplainCommand other = (ExplainCommand) obj; | ||
| return Objects.equals(analyze, other.analyze) | ||
| && Objects.equals(command, other.command) | ||
| && Objects.equals(format, other.format); | ||
| } | ||
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| @Override | ||
| public Command getActualCommand() { | ||
| return command; | ||
| } | ||
|
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| } |
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