Getting schema information
The following actions return information about a table in a database. The actions are only valid in the handleResult action specified in a doSQLQuery, doSQLQueryOnError, or doSQLQueryAck operation when dealing with a returned row.
action getSchemaFieldOrder()  returns sequence< string > 
action getSchemaFieldTypes()  returns dictionary< string, string > 
action getSchemaIndexFields() returns sequence< string >