[MCOL-4590] UNION Performance Improvement with the focus on the normalize functions.

Browse Source

This patch improves the runtime performance of UNION processing in CS, as reported JIRA issue MCOL 4590. The idea of the optimization is to infer the normalize seperate functions beforehand and perform the normalization individually later, instead of a huge switch body of all normalization. This patch also cover engineering optimization, removing the hotspots in UNION processing. After application of this patch, the normalize part takes only about 25% of the whole UNION query in our experiment avg case.

Signed-off-by: Jigao Luo <luojigao@outlook.com>

...

This commit is contained in:

Jigao Luo

2022-09-09 14:51:35 +02:00

parent e000236af7

commit 7f97a66184

2 changed files with 1260 additions and 760 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download Patch File Download Diff File Expand all files Collapse all files

2014

dbcon/joblist/tupleunion.cpp

File diff suppressed because it is too large Load Diff