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This could happen when using Aria for internal temporary files (default case) and using DISTINCT. _ma_scan_restore_block_record() didn't work correctly if there was rows inserted, updated or deleted on the handler between calls to _ma_scan_remember_block_record() and _ma_scan_restore_block_record(). The effect was that some DISTINCT queries that used remove_dup_with_compare() could fail. .bzrignore: Ignore sql_yacc.hh mysql-test/suite/maria/r/distinct.result: Test case for MDEV-4280 mysql-test/suite/maria/t/distinct.test: Test case for MDEV-4280 mysql-test/t/mysql.test: Fixed test suite (we could get error -1 in some cases) sql/sql_select.cc: Break loop if restart_rnd_next() gives an error storage/maria/ha_maria.cc: scan_restore_pos() can return disk fault error. storage/maria/ma_blockrec.c: _ma_scan_remember_block_record() did incorrectly update scan.dir instead of scan_save.dir . _ma_scan_restore_block_record() didn't work correctly if there was rows inserted,updated or deleted on the handler between calls to _ma_scan_remember_block_record() and _ma_scan_restore_block_record(). Fixed by adding counters for row changes and reading the current scan page if changes had been made. storage/maria/ma_blockrec.h: scan_restore_pos() can return disk fault error. storage/maria/ma_delete.c: Increment row_changes storage/maria/ma_scan.c: scan_restore_pos() can return disk fault error. storage/maria/ma_update.c: Increment row_changes storage/maria/ma_write.c: Increment row_changes storage/maria/maria_def.h: scan_restore_pos() can return disk fault error. |
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