db_sqlite: new parameters and minor improvements #3545
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ptr->con is always NULL at this moment
sqlite3_db_config with SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION affects only C-API without enabling SQL function load_extension()
The proper way to handle a locked database is to use a busy timeout. Previously, the behavior resulted in an infinite lock for the process attempting to write to the locked database. The default value for the busy timeout has been set to 500 ms to avoid immediate errors when short database locks occur.
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Summary
Details
The PR was started as new feature, but fixed some issues during implementation.
Solution
Please review commits
Compatibility
The original behavior has been changed. If the database is locked, the process attempting to access it will no longer enter an infinite loop. Instead, it will return an error after the default timeout of 500 ms (this value can be modified as module parameter).