Worked on the ydb-platform/ydb repository to deliver a feature that disables the PgSyntax option by default, ensuring SQL commands are handled correctly even when PgSyntax is turned off. This involved updating feature flags and associated tests to reflect the new default-off behavior, which improved system stability and reduced the risk during feature rollout. The work required careful management of database configurations and thorough testing to validate the changes. Utilized Python programming and SQL skills, along with experience in database management and testing, to implement and verify the feature, focusing on maintaining robust and predictable SQL processing within the platform.