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Getting started with the coding.


Hi Alexander,

I have started working on "CREATE OR REPLACE DATABASE" implementation. I
thought this one has the least complexity among all the other commands. I
am getting my hand-on debugging the source code too.

I have made the required changes in sql_yacc.yy. The command is parsed
properly. Handled the error where CREATE OR REPLACE and IF NOT EXISTS
cannot occur at the same time.

This is how I am thinking of proceeding with the implementation,

In method mysql_create_db after checking the flag HA_LEX_CREATE_REPLACE. I
am removing the database by calling mysql_rm_db and then the current
implementation will take care of creating the new db with the same name.

This seems correct? Or is there anything I need to consider?


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