Connection.statementToSql

string statementToSql(gda.statement.Statement stmt,  gda.set.Set params,  gda.types.StatementSqlFlag flags,  out  gda.holder.Holder[]  paramsUsed)

Renders stmt as an SQL statement, adapted to the SQL dialect used by cnc

`stmt`	a #GdaStatement object
`params`	a #GdaSet object (which can be obtained using [gda.statement.Statement.getParameters]), or null
`flags`	SQL rendering flags, as #GdaStatementSqlFlag OR'ed values
`paramsUsed`	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

[ConnectionException]