{
// Generate Merge expression
resetParamUsage();
StringBuilder buf = new StringBuilder("MERGE INTO ");
DBRowSet table = set.get(0).getTable();
table.addSQL(buf, CTX_FULLNAME|CTX_ALIAS);
// join (only one allowed yet)
DBJoinExpr updateJoin = null;
for (DBJoinExpr jex : joins)
{ // The join
if (jex.isJoinOn(table)==false)