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gc_worker: Remove timezone name from the times that are saved in mysql.tidb #8745
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Signed-off-by: MyonKeminta <[email protected]>
Signed-off-by: MyonKeminta <[email protected]>
/run-all-tests |
@MyonKeminta Please fix ci |
LGTM |
/run-common-test |
Sorry.. I didn't make it to figure out what was wrong with CI... |
/run-common-test |
/run-common-test |
/run-all-tests |
/run-unit-test |
1 similar comment
/run-unit-test |
@zhexuany PTAL again thanks! |
@disksing PTAL |
if err != nil { | ||
// Remove the last field that separated by space | ||
parts := strings.Split(value, " ") | ||
prefix := strings.Join(parts[:len(parts)-1], " ") |
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Will it out of range?
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No, it should returns at least one parts. You split ""
by " "
then you should got [""]
. You can also see that the test has passed.
Signed-off-by: MyonKeminta <[email protected]>
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LGTM
/run-all-tests |
/run-unit-test |
/run-all-tests |
/run-all-tests |
…l.tidb (pingcap#8745) Signed-off-by: MyonKeminta <[email protected]>
…l.tidb (pingcap#8745) Signed-off-by: MyonKeminta <[email protected]>
What problem does this PR solve?
gc_worker saves some times in mysql.tidb. These times are:
tikv_gc_safe_point
,tikv_gc_last_run_time
,tikv_gc_leader_lease
.Now our format is
20060102-15:04:05 -0700 MST
. The time zone is specified twice by"-0700"
and"MST"
. This seems to be ok, but unfortunately it caused a problem: in some environments, it can't get a timezone name properly, only to produce something like"20181218-19:53:37 +0800 +08"
. Then if we try to load it from the table, we will get an error when parsing the string, which sayscannot parse "+08" as "MST"
.This PR tries to solve this problem by deprecating the last field
"MST"
, but still be able to load the time with the old format.What is changed and how it works?
A function named
ParseTimeFromPrefix
was added. It tries to parse a time with specified format from a prefix of a given string, and the string should contain a space that separate the prefix and the rest of the string. So when we use this function to parse the string"20181218-19:53:37 +0800 +08"
or"20181218-19:53:37 +0800 CST"
with the format"20060102-15:04:05 -0700"
, we actually ignored the last"+08"
or"CST"
. So it's compatible with old format.Check List
Tests
Code changes
ParseTimeFromPrefix
20060102-15:04:05 -0700 MST
to20060102-15:04:05 -0700
Side effects
Related changes
This change is