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For a join query with GROUP BY and/or ORDER BY and a view reference in the FROM list the metadata erroneously showed empty table aliases and database names for the view columns. sql/item.h: Fixed bug #28898. Body of Item_ref::get_tmp_table_item method has been moved to item.cc file. mysql-test/t/metadata.test: Updated test case for bug #28898. sql/item.cc: Fixed bug #28898. The Item_ref::get_tmp_table_item method has been modified to copy pointers to the table alias and database name to the new Item_field object created for a field stored in the temporary table. mysql-test/r/metadata.result: Updated test case for bug #28898. sql/sql_select.cc: Fixed bug #28898. The change_to_use_tmp_fields function has been modified to to copy pointers to the table alias and database name from the Item_ref objects to the new Item_field objects created for fields stored in the temporary table.
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