liquibase.sqlgenerator.core.AddAutoIncrementGeneratorMySQL Maven / Gradle / Ivy
package liquibase.sqlgenerator.core;
import liquibase.database.Database;
import liquibase.database.core.MySQLDatabase;
import liquibase.sql.Sql;
import liquibase.sql.UnparsedSql;
import liquibase.sqlgenerator.SqlGeneratorChain;
import liquibase.statement.core.AddAutoIncrementStatement;
import liquibase.structure.DatabaseObject;
import liquibase.structure.core.Schema;
import liquibase.structure.core.Table;
/**
* SQLite does not support this ALTER TABLE operation until now.
* For more information see: http://www.sqlite.org/omitted.html.
* This is a small work around...
*/
public class AddAutoIncrementGeneratorMySQL extends AddAutoIncrementGenerator {
@Override
public int getPriority() {
return PRIORITY_DATABASE;
}
@Override
public boolean supports(AddAutoIncrementStatement statement, Database database) {
return database instanceof MySQLDatabase;
}
@Override
public Sql[] generateSql(final AddAutoIncrementStatement statement, Database database, SqlGeneratorChain sqlGeneratorChain) {
Sql[] sql = super.generateSql(statement, database, sqlGeneratorChain);
if(statement.getStartWith() != null){
MySQLDatabase mysqlDatabase = (MySQLDatabase)database;
String alterTableSql = "ALTER TABLE "
+ mysqlDatabase.escapeTableName(statement.getCatalogName(), statement.getSchemaName(), statement.getTableName())
+ " "
+ mysqlDatabase.getTableOptionAutoIncrementStartWithClause(statement.getStartWith());
sql = concact(sql, new UnparsedSql(alterTableSql, getAffectedTable(statement)));
}
return sql;
}
private Sql[] concact(Sql[] origSql, UnparsedSql unparsedSql) {
Sql[] changedSql = new Sql[origSql.length+1];
System.arraycopy(origSql, 0, changedSql, 0, origSql.length);
changedSql[origSql.length] = unparsedSql;
return changedSql;
}
private DatabaseObject getAffectedTable(AddAutoIncrementStatement statement) {
return new Table().setName(statement.getTableName()).setSchema(new Schema(statement.getCatalogName(), statement.getSchemaName()));
}
}