Little correction/modification: when you use &x syntax, the input string just textually replaces the &x parameter. So, the bind parameters, :1 syntax, is more appropriate for what I ask for. Currently, when you execute something like UPDATE document SET content=:1 WHERE doc_id=4775333087182336, you will get an the error "ORA-01008: not all variables bound". It would be great if the tool allowed the user to select the type and enter the value of the bind parameters.