Sergey Glukhov 18303b70c6 Bug#48294 assertion when creating a view based on some row() construct in select query ...

In case of 'CREATE VIEW' subselect transformation does not happen(see JOIN::prepare).
During fix_fields Item_row may call is_null() method for its arugmens which
leads to item calculation(wrong subselect in our case as
transformation did not happen before). This is_null() call
does not make sence for 'CREATE VIEW'.
Note:
Only Item_row is affected because other items don't call is_null() 
during fix_fields() for arguments.

2010-02-12 13:44:20 +04:00

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