package liquibase.change.core;
import liquibase.change.*;
import liquibase.database.Database;
import liquibase.snapshot.SnapshotGeneratorFactory;
import liquibase.statement.SqlStatement;
import liquibase.statement.core.DropSequenceStatement;
import liquibase.structure.core.Sequence;
/**
* Drops an existing sequence.
*/
@DatabaseChange(name="dropSequence", description = "Drop an existing sequence", priority = ChangeMetaData.PRIORITY_DEFAULT, appliesTo = "sequence")
public class DropSequenceChange extends AbstractChange {
private String catalogName;
private String schemaName;
private String sequenceName;
@DatabaseChangeProperty(mustEqualExisting = "sequence.catalog", since = "3.0")
public String getCatalogName() {
return catalogName;
}
public void setCatalogName(String catalogName) {
this.catalogName = catalogName;
}
@DatabaseChangeProperty(mustEqualExisting ="sequence.schema")
public String getSchemaName() {
return schemaName;
}
public void setSchemaName(String schemaName) {
this.schemaName = schemaName;
}
@DatabaseChangeProperty(mustEqualExisting = "sequence", description = "Name of the sequence to drop")
public String getSequenceName() {
return sequenceName;
}
public void setSequenceName(String sequenceName) {
this.sequenceName = sequenceName;
}
@Override
public SqlStatement[] generateStatements(Database database) {
return new SqlStatement[]{new DropSequenceStatement(getCatalogName(), getSchemaName(), getSequenceName())};
}
@Override
public ChangeStatus checkStatus(Database database) {
try {
return new ChangeStatus().assertComplete(!SnapshotGeneratorFactory.getInstance().has(new Sequence(getCatalogName(), getSchemaName(), getSequenceName()), database), "Sequence exists");
} catch (Exception e) {
return new ChangeStatus().unknown(e);
}
}
@Override
public String getConfirmationMessage() {
return "Sequence " + getSequenceName() + " dropped";
}
@Override
public String getSerializedObjectNamespace() {
return STANDARD_CHANGELOG_NAMESPACE;
}
}