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HHH-18142 Add Oracle Database 23ai support for DROP SEQUENCE IF EXISTS

This commit is contained in:
LLEFEVRE 2024-05-21 11:14:54 +02:00 committed by Christian Beikov
parent 31e3be15bf
commit fcc33f3fe1
3 changed files with 28 additions and 4 deletions
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2
hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/OracleLegacyDialect.java
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@ -993,7 +993,7 @@ public class OracleLegacyDialect extends Dialect {
@Override
public SequenceSupport getSequenceSupport() {
return OracleSequenceSupport.INSTANCE;
return OracleSequenceSupport.getInstance(this);
}
@Override

2
hibernate-core/src/main/java/org/hibernate/dialect/OracleDialect.java
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@ -1048,7 +1048,7 @@ public class OracleDialect extends Dialect {
@Override
public SequenceSupport getSequenceSupport() {
return OracleSequenceSupport.INSTANCE;
return OracleSequenceSupport.getInstance(this);
}
@Override

28
hibernate-core/src/main/java/org/hibernate/dialect/sequence/OracleSequenceSupport.java
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@ -6,22 +6,46 @@
*/
package org.hibernate.dialect.sequence;
import org.hibernate.MappingException;
import org.hibernate.dialect.Dialect;
/**
* Sequence support for {@link org.hibernate.dialect.OracleDialect}.
*
* @author Gavin King
* @author Loïc Lefèvre
*
* @see <a href="https://docs.oracle.com/en/database/oracle/oracle-database/23/sqlrf/CREATE-SEQUENCE.html">Oracle Database Documentation</a>
*/
public final class OracleSequenceSupport extends NextvalSequenceSupport {
public static final SequenceSupport INSTANCE = new OracleSequenceSupport();
public static SequenceSupport getInstance(final Dialect dialect) {
return new OracleSequenceSupport(dialect);
}
private final boolean requiresFromDUAL;
private final boolean supportsIfExists;
// TODO: HHH-18144 - Support Oracle sequence optional KEEP for Application Continuity
// TODO: HHH-18143 - Support Oracle scalable sequences for RAC
public OracleSequenceSupport(final Dialect dialect) {
requiresFromDUAL = dialect.getVersion().isBefore(23);
supportsIfExists = dialect.getVersion().isSameOrAfter(23);
}
@Override
public String getFromDual() {
return " from dual";
return requiresFromDUAL ? " from dual" : "";
}
@Override
public boolean sometimesNeedsStartingValue() {
return true;
}
@Override
public String getDropSequenceString(String sequenceName) throws MappingException {
return "drop sequence " + (supportsIfExists ? "if exists " : "") + sequenceName;
}
}