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merge with 4.0.9

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To get bug fixes for TCP/IP connections, FORCE INDEX and OPTIMIZE TABLE with NULL keys
This commit is contained in:
monty@mashka.mysql.fi
2003-01-09 03:55:26 +02:00
parent a101784930 2ea43f3c53
commit f8e660d88c
36 changed files with 601 additions and 197 deletions
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4
sql/opt_range.cc
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@ -603,12 +603,14 @@ int SQL_SELECT::test_quick_select(key_map keys_to_use, table_map prev_tables,
records++; /* purecov: inspected */
scan_time=(double) records / TIME_FOR_COMPARE+1;
read_time=(double) head->file->scan_time()+ scan_time + 1.0;
if (head->force_index)
scan_time= read_time= DBL_MAX;
if (limit < records)
read_time=(double) records+scan_time+1; // Force to use index
else if (read_time <= 2.0 && !force_quick_range)
DBUG_RETURN(0); /* No need for quick select */
DBUG_PRINT("info",("Time to scan table: %ld",(long) read_time));
DBUG_PRINT("info",("Time to scan table: %g", read_time));
keys_to_use&=head->keys_in_use_for_query;
if (keys_to_use)