org.h2.command.ddl.AlterTableRenameConstraint Maven / Gradle / Ivy
/*
* Copyright 2004-2014 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.command.ddl;
import org.h2.api.ErrorCode;
import org.h2.command.CommandInterface;
import org.h2.constraint.Constraint;
import org.h2.engine.Right;
import org.h2.engine.Session;
import org.h2.message.DbException;
import org.h2.schema.Schema;
/**
* This class represents the statement
* ALTER TABLE RENAME CONSTRAINT
*/
public class AlterTableRenameConstraint extends SchemaCommand {
private String constraintName;
private String newConstraintName;
public AlterTableRenameConstraint(Session session, Schema schema) {
super(session, schema);
}
public void setConstraintName(String string) {
constraintName = string;
}
public void setNewConstraintName(String newName) {
this.newConstraintName = newName;
}
@Override
public int update() {
session.commit(true);
Constraint constraint = getSchema().findConstraint(session, constraintName);
if (constraint == null) {
throw DbException.get(ErrorCode.CONSTRAINT_NOT_FOUND_1, constraintName);
}
if (getSchema().findConstraint(session, newConstraintName) != null ||
newConstraintName.equals(constraintName)) {
throw DbException.get(ErrorCode.CONSTRAINT_ALREADY_EXISTS_1,
newConstraintName);
}
session.getUser().checkRight(constraint.getTable(), Right.ALL);
session.getUser().checkRight(constraint.getRefTable(), Right.ALL);
session.getDatabase().renameSchemaObject(session, constraint, newConstraintName);
return 0;
}
@Override
public int getType() {
return CommandInterface.ALTER_TABLE_RENAME_CONSTRAINT;
}
}