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Merge pull request #3381 from katzyn/legacy
Add IDENTITY() and SCOPE_IDENTITY() to LEGACY mode
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/* | ||
* Copyright 2004-2022 H2 Group. Multiple-Licensed under the MPL 2.0, | ||
* and the EPL 1.0 (https://h2database.com/html/license.html). | ||
* Initial Developer: H2 Group | ||
*/ | ||
package org.h2.mode; | ||
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import java.util.HashMap; | ||
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import org.h2.engine.SessionLocal; | ||
import org.h2.expression.Expression; | ||
import org.h2.message.DbException; | ||
import org.h2.value.TypeInfo; | ||
import org.h2.value.Value; | ||
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/** | ||
* This class implements some legacy functions not available in Regular mode. | ||
*/ | ||
public class FunctionsLegacy extends ModeFunction { | ||
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private static final HashMap<String, FunctionInfo> FUNCTIONS = new HashMap<>(); | ||
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private static final int IDENTITY = 6001; | ||
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private static final int SCOPE_IDENTITY = IDENTITY + 1; | ||
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static { | ||
FUNCTIONS.put("IDENTITY", new FunctionInfo("IDENTITY", IDENTITY, 0, Value.BIGINT, true, false)); | ||
FUNCTIONS.put("SCOPE_IDENTITY", | ||
new FunctionInfo("SCOPE_IDENTITY", SCOPE_IDENTITY, 0, Value.BIGINT, true, false)); | ||
} | ||
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/** | ||
* Returns mode-specific function for a given name, or {@code null}. | ||
* | ||
* @param upperName | ||
* the upper-case name of a function | ||
* @return the function with specified name or {@code null} | ||
*/ | ||
public static FunctionsLegacy getFunction(String upperName) { | ||
FunctionInfo info = FUNCTIONS.get(upperName); | ||
if (info != null) { | ||
return new FunctionsLegacy(info); | ||
} | ||
return null; | ||
} | ||
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private FunctionsLegacy(FunctionInfo info) { | ||
super(info); | ||
} | ||
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@Override | ||
public Value getValue(SessionLocal session) { | ||
switch (info.type) { | ||
case IDENTITY: | ||
case SCOPE_IDENTITY: | ||
return session.getLastIdentity().convertTo(type); | ||
default: | ||
throw DbException.getInternalError("type=" + info.type); | ||
} | ||
} | ||
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@Override | ||
public Expression optimize(SessionLocal session) { | ||
type = TypeInfo.getTypeInfo(info.returnDataType); | ||
return this; | ||
} | ||
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} |
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4 changes: 0 additions & 4 deletions
4
h2/src/test/org/h2/test/scripts/functions/system/scope-identity.sql
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