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Progress report for MDEV-12326


Hope you are safe and doing great,

This post describes the things I've done during 8-14 June under the
mentor-ship of Sergei Golubchik and Oleksandr Byelkin for GSoC-20 to
implement MDEV-12326.

The tasks taken up for this week was to work towards extending the parser
for multi-table DELETE....RETURNING by changing the sql_yacc.yy file, for
incorporating opt_returning rule in multi-delete query format. The
RETURNING_SYM in opt_returning rule incorporates the RETURNING keyword and
works completely fine with <column_names> but for some reason it fails and
crashes the server for RETURNING * . I'll try to run it in a debugger and
will try to fix it soon. Meanwhile, I'll also be pushing the code on this
branch (https://github.com/MariaDB/server/pull/1590/commits).

Thank you

Mohammed Hammaad Mateen