Should you decide to customize your own functions, or have specific information you want to put into the database, you can use the -query function to perform a single query step.
java -cp "jars/*" tigase.util.DBSchemaLoader -dpType mysql -dbName tigasedb -rootUser root -rootPass root -query "CREATE TABLE tigasedb.EXTRA_TABLE (id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY, name VARCHAR(10) NOT NULL)"
Of course this would break the schema for tigasedb by adding an unexpected table, you will receive the following message:
tigase.util.DBSchemaLoader printInfo WARNING Database schema is invalid
But this is a demonstration how you may run a query through the database without the need to use another tool. Note that you will need to select the specific database for each query.