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set explain on doesn't work

set explain on doesn't work

(OP)
I'm to do a database exercise in school about query optimization. This involves using the explain command, and also the execute command. The problem is that when I open the dbVisualizer, connect to the database and type 'set explain on;' I get the following error message:

[Error Code: -12103, SQL State: 42000]  Syntax error, IDENTIFIER 'ON'  assumed to mean 'DATABASE' 'OFFLINE'

When I try 'set execute off;' I get:

[Error Code: -12103, SQL State: 42000]  Syntax error, 'EXECUTE'  assumed to mean 'PATH'

I'm using the latest verision (10.0) and these features are supposed to work in verision 9.2.2 and later. So why doesn't it work?

RE: set explain on doesn't work

set explain on and set execute on is supported through the BSQL utiliity, not dbVisualizer.

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