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4 commits

Author SHA1 Message Date
monty@mysql.com
86508ad969 Fix test results 2004-12-06 01:34:19 +02:00
sergefp@mysql.com
838eaec709 Fix and testcase for BUG#4984 
The crash is eliminated but still it is weird/inefficent that ROR-intersection is used when performing updates in empty table.
 2004-08-11 16:40:46 +04:00
sergefp@mysql.com
dff98a8ef7 * New index_merge EXPLAIN output format 
* Fixed a problem with wrong query results for partially covering keys in ROR-index_merge
 * ROR-intersection retrieval plan choice algorithm now uses less disk IO
   - and properly processes clustered PK range scans 
 * Fixed several minor range optimizer problems
 * Added more comments
 * Code cleanup
 2004-05-29 02:04:01 +04:00
sergefp@mysql.com
a46d7542c9 This is first cset for WL#1394 "Optimize index merge when all involved index ranges include only values with equal keys" 
The main idea is to exploit the fact that key scans for "key=const" return ordered sequences of rowids.
 2004-05-13 01:38:40 +04:00