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MDEV-22303: Incorrect ordering with REGEXP_REPLACE and OFFSET/LIMIT
For character sets and collation where character to weight mapping > 1, there we need to make sure while creating a sort key, a temporary buffer is created to store the value of the item by val_str function and then copy that value back to the sort buffer. In this case when using a priority queue Sort_param::tmp_buffer was not allocated. Minor refactoring: Changed Sort_param::tmp_buffer from char* to String
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Varun Gupta
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Jun 1, 2020
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