liquibase.snapshot.jvm.PrimaryKeySnapshotGenerator Maven / Gradle / Ivy
package liquibase.snapshot.jvm;
import liquibase.CatalogAndSchema;
import liquibase.database.AbstractJdbcDatabase;
import liquibase.database.Database;
import liquibase.database.core.MSSQLDatabase;
import liquibase.database.core.SQLiteDatabase;
import liquibase.exception.DatabaseException;
import liquibase.snapshot.CachedRow;
import liquibase.snapshot.InvalidExampleException;
import liquibase.snapshot.DatabaseSnapshot;
import liquibase.snapshot.JdbcDatabaseSnapshot;
import liquibase.structure.DatabaseObject;
import liquibase.structure.core.*;
import java.sql.SQLException;
import java.util.Arrays;
import java.util.List;
public class PrimaryKeySnapshotGenerator extends JdbcSnapshotGenerator {
public PrimaryKeySnapshotGenerator() {
super(PrimaryKey.class, new Class[]{Table.class});
}
@Override
protected DatabaseObject snapshotObject(DatabaseObject example, DatabaseSnapshot snapshot) throws DatabaseException, InvalidExampleException {
Database database = snapshot.getDatabase();
Schema schema = example.getSchema();
String searchTableName = null;
if (((PrimaryKey) example).getTable() != null) {
searchTableName = ((PrimaryKey) example).getTable().getName();
searchTableName = database.correctObjectName(searchTableName, Table.class);
}
List rs = null;
try {
JdbcDatabaseSnapshot.CachingDatabaseMetaData metaData = ((JdbcDatabaseSnapshot) snapshot).getMetaData();
rs = metaData.getPrimaryKeys(((AbstractJdbcDatabase) database).getJdbcCatalogName(schema), ((AbstractJdbcDatabase) database).getJdbcSchemaName(schema), searchTableName);
PrimaryKey returnKey = null;
for (CachedRow row : rs) {
if (example.getName() != null && !example.getName().equals(row.getString("PK_NAME"))) {
continue;
}
String columnName = cleanNameFromDatabase(row.getString("COLUMN_NAME"), database);
short position = row.getShort("KEY_SEQ");
if (returnKey == null) {
returnKey = new PrimaryKey();
CatalogAndSchema tableSchema = ((AbstractJdbcDatabase) database).getSchemaFromJdbcInfo(row.getString("TABLE_CAT"), row.getString("TABLE_SCHEM"));
returnKey.setTable((Table) new Table().setName(row.getString("TABLE_NAME")).setSchema(new Schema(tableSchema.getCatalogName(), tableSchema.getSchemaName())));
returnKey.setName(row.getString("PK_NAME"));
}
if (database instanceof SQLiteDatabase) { //SQLite is zero based position?
position = (short) (position + 1);
}
returnKey.addColumnName(position - 1, columnName);
}
if (returnKey != null) {
Index exampleIndex = new Index().setTable(returnKey.getTable());
exampleIndex.getColumns().addAll(Arrays.asList(returnKey.getColumnNames().split("\\s*,\\s*")));
if (database instanceof MSSQLDatabase) { //index name matches PK name for better accuracy
exampleIndex.setName(returnKey.getName());
}
returnKey.setBackingIndex(exampleIndex);
}
return returnKey;
} catch (SQLException e) {
throw new DatabaseException(e);
}
}
@Override
protected void addTo(DatabaseObject foundObject, DatabaseSnapshot snapshot) throws DatabaseException, InvalidExampleException {
if (!snapshot.getSnapshotControl().shouldInclude(PrimaryKey.class)) {
return;
}
if (foundObject instanceof Table) {
Table table = (Table) foundObject;
Database database = snapshot.getDatabase();
Schema schema = table.getSchema();
List rs = null;
try {
JdbcDatabaseSnapshot.CachingDatabaseMetaData metaData = ((JdbcDatabaseSnapshot) snapshot).getMetaData();
rs = metaData.getPrimaryKeys(((AbstractJdbcDatabase) database).getJdbcCatalogName(schema), ((AbstractJdbcDatabase) database).getJdbcSchemaName(schema), table.getName());
if (rs.size() > 0) {
table.setPrimaryKey(new PrimaryKey().setName(rs.get(0).getString("PK_NAME")).setTable(table));
}
} catch (SQLException e) {
throw new DatabaseException(e);
}
}
}
//FROM SQLIteDatabaseSnapshotGenerator
// protected void readPrimaryKeys(DatabaseSnapshot snapshot, String schema, DatabaseMetaData databaseMetaData) throws DatabaseException, SQLException {
// Database database = snapshot.getDatabase();
// updateListeners("Reading primary keys for " + database.toString() + " ...");
//
// //we can't add directly to the this.primaryKeys hashSet because adding columns to an exising PK changes the hashCode and .contains() fails
// List foundPKs = new ArrayList();
//
// for (Table table : snapshot.getTables()) {
// ResultSet rs = databaseMetaData.getPrimaryKeys(database.convertRequestedSchemaToCatalog(schema), database.convertRequestedSchemaToSchema(schema), table.getName());
//
// try {
// while (rs.next()) {
// String tableName = rs.getString("TABLE_NAME");
// String columnName = rs.getString("COLUMN_NAME");
// short position = rs.getShort("KEY_SEQ");
//
// if (!(database instanceof SQLiteDatabase)) {
// position -= 1;
// }
//
// boolean foundExistingPK = false;
// for (PrimaryKey pk : foundPKs) {
// if (pk.getTable().getName().equals(tableName)) {
// pk.addColumnName(position, columnName);
//
// foundExistingPK = true;
// }
// }
//
// if (!foundExistingPK) {
// PrimaryKey primaryKey = new PrimaryKey();
// primaryKey.setTable(table);
// primaryKey.addColumnName(position, columnName);
// primaryKey.setName(rs.getString("PK_NAME"));
//
// foundPKs.add(primaryKey);
// }
// }
// } finally {
// rs.close();
// }
//
// }
//
// snapshot.getPrimaryKeys().addAll(foundPKs);
// }
// FROM MySQLDatabaseSnapshotGenerator
// protected boolean includeInSnapshot(DatabaseObject obj) {
// if (obj instanceof Index && obj.getName().equals("PRIMARY")) {
// return false;
// }
// return super.includeInSnapshot(obj);
// }
//below code was in OracleDatabaseSnapshotGenerator
// @Override
// protected void readPrimaryKeys(DatabaseSnapshot snapshot, String schema, DatabaseMetaData databaseMetaData) throws DatabaseException, SQLException {
// Database database = snapshot.getDatabase();
// updateListeners("Reading primary keys for " + database.toString() + " ...");
//
// //we can't add directly to the this.primaryKeys hashSet because adding columns to an exising PK changes the hashCode and .contains() fails
// List foundPKs = new ArrayList();
// // Setting default schema name. Needed for correct statement generation
// if (schema == null)
// schema = database.convertRequestedSchemaToSchema(schema);
//
// String query = "select uc.table_name TABLE_NAME,ucc.column_name COLUMN_NAME,ucc.position KEY_SEQ,uc.constraint_name PK_NAME,ui.tablespace_name TABLESPACE from all_constraints uc,all_indexes ui,all_cons_columns ucc where uc.constraint_type = 'P' and uc.index_name = ui.index_name and uc.constraint_name = ucc.constraint_name and uc.owner = '" + schema + "' and ui.table_owner = '" + schema + "' and ucc.owner = '" + schema + "' and uc.table_name = ui.table_name and ui.table_name = ucc.table_name";
// Statement statement = null;
// ResultSet rs = null;
// try {
// statement = ((JdbcConnection) database.getConnection()).getUnderlyingConnection().createStatement();
// rs = statement.executeQuery(query);
//
// while (rs.next()) {
// String tableName = cleanObjectNameFromDatabase(rs.getString("TABLE_NAME"));
// String tablespace = cleanObjectNameFromDatabase(rs.getString("TABLESPACE"));
// String columnName = cleanObjectNameFromDatabase(rs.getString("COLUMN_NAME"));
// short position = rs.getShort("KEY_SEQ");
//
// boolean foundExistingPK = false;
// for (PrimaryKey pk : foundPKs) {
// if (database.objectNamesEqual(pk.getTable().getName(), tableName)) {
// pk.addColumnName(position - 1, columnName);
//
// foundExistingPK = true;
// }
// }
//
// if (!foundExistingPK && !database.isLiquibaseTable(tableName)) {
// PrimaryKey primaryKey = new PrimaryKey();
// primaryKey.setTablespace(tablespace);
// Table table = snapshot.getTable(tableName);
// if (table == null) {
// continue; //probably a different schema
// }
// primaryKey.setTable(table);
// primaryKey.addColumnName(position - 1, columnName);
// primaryKey.setName(database.correctPrimaryKeyName(rs.getString("PK_NAME")));
//
// foundPKs.add(primaryKey);
// }
// }
// } finally {
// JdbcUtils.closeResultSet(rs);
// JdbcUtils.closeStatement(statement);
// }
//
// snapshot.getPrimaryKeys().addAll(foundPKs);
// }
}
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