On 24-12-2021 13:14, Adriano dos Santos Fernandes wrote:
On 24/12/2021 07:12, Mark Rotteveel wrote:
Checking the changes of Firebird 4.0.1 to update the docs, I noticed
that a new statement `SET DEBUG OPTION` has been introduced, but I can't
find much about it, except for "To make isc_info_sql_exec_path_blr_*
work, session must be first execute set debug option dsql_keep_blr =
true." in https://github.com/FirebirdSQL/firebird/issues/6910
Questions:
1. Is dsql_keep_blr the only option at the moment, or are there more?
(the code suggests not)
It's the only one.
2. Is SET DEBUG OPTION general for an entire connection, or does it need
to be executed on the statement handle you want to retrieve one of the
isc_info_sql_exec_path_blr_* options from? (checking the commit, it
seems to be attachment level, but I'd like confirmation
It's for the attachment.
3. How do you clear an option, set value to false, can you set to null?
SET DEBUG OPTION valid_symbol_name '=' constant
The general command accepts any constant (NULL is not included).
DSQL_KEEP_BLR requires a boolean constant. But it can also be implicit
converted via strings ('true' or 'false').
Also, is there more to it than this?
It's good to reproduce the warning put in the issue:
----
Warning: this feature is very tied to engine internals and its usage is
discouraged
if you do not understand very well how these internals are subject to
change between
versions.
----
Thanks, I added the following:
- ISQL:
https://www.firebirdsql.org/file/documentation/html/en/firebirddocs/isql/firebird-isql.html#isql-set-exec-path-display
- langref:
https://www.firebirdsql.org/file/documentation/chunk/en/refdocs/fblangref40/fblangref40-management-debug.html#fblangref40-management-setdebugoption
Mark
--
Mark Rotteveel
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