private static URL getDdlUrl(String dbType) {
    return Resources.getResource("Ambari-DDL-" + dbType + "-CREATE.sql");
  }
Loads and parses the DDL for a specific database type (e.g. Postgres). Already loaded DDL's are cached.
@param dbType One of the supported databases @see #DATABASES
@return the parsed DDL
@throws Exception if exception occurs during loading/parsing
ambari-server/src/test/java/org/apache/ambari/server/orm/db/DDLTestUtils.java