a #GdaStatement object
a #GdaSet object (which can be obtained using gda.statement.Statement.getParameters), or null
SQL rendering flags, as #GdaStatementSqlFlag OR'ed values
a place to store the list of individual #GdaHolder objects within params which have been used
a new string, or null if an error occurred
Renders stmt as an SQL statement, adapted to the SQL dialect used by cnc