package liquibase.change.core;
import liquibase.change.*;
import liquibase.database.Database;
import liquibase.snapshot.SnapshotGeneratorFactory;
import liquibase.statement.SqlStatement;
import liquibase.statement.core.DropIndexStatement;
import liquibase.structure.core.ForeignKey;
import liquibase.structure.core.Index;
/**
* Drops an existing index.
*/
@DatabaseChange(name="dropIndex", description = "Drops an existing index", priority = ChangeMetaData.PRIORITY_DEFAULT, appliesTo = "index")
public class DropIndexChange extends AbstractChange {
private String schemaName;
private String indexName;
private String tableName;
private String associatedWith;
private String catalogName;
@DatabaseChangeProperty(mustEqualExisting ="index.schema")
public String getSchemaName() {
return schemaName;
}
public void setSchemaName(String schemaName) {
this.schemaName = schemaName;
}
@DatabaseChangeProperty(mustEqualExisting = "index", description = "Name of the index to drop")
public String getIndexName() {
return indexName;
}
public void setIndexName(String indexName) {
this.indexName = indexName;
}
@DatabaseChangeProperty(mustEqualExisting = "index.table", description = "Name fo the indexed table.")
public String getTableName() {
return tableName;
}
public void setTableName(String tableName) {
this.tableName = tableName;
}
@Override
public SqlStatement[] generateStatements(Database database) {
return new SqlStatement[] {
new DropIndexStatement(getIndexName(), getCatalogName(), getSchemaName(), getTableName(), getAssociatedWith())
};
}
@Override
public ChangeStatus checkStatus(Database database) {
try {
return new ChangeStatus().assertComplete(!SnapshotGeneratorFactory.getInstance().has(new Index(getIndexName(), getCatalogName(), getSchemaName(), getTableName()), database), "Index exists");
} catch (Exception e) {
return new ChangeStatus().unknown(e);
}
}
@Override
public String getConfirmationMessage() {
return "Index " + getIndexName() + " dropped from table " + getTableName();
}
@DatabaseChangeProperty(isChangeProperty = false)
public String getAssociatedWith() {
return associatedWith;
}
public void setAssociatedWith(String associatedWith) {
this.associatedWith = associatedWith;
}
@DatabaseChangeProperty(mustEqualExisting = "index.catalog", since = "3.0")
public String getCatalogName() {
return catalogName;
}
public void setCatalogName(String catalogName) {
this.catalogName = catalogName;
}
@Override
public String getSerializedObjectNamespace() {
return STANDARD_CHANGELOG_NAMESPACE;
}
}