Uh oh!
There was an error while loading. Please reload this page.
[SPARK-31892][SQL] Disable week-based date filed for parsing - #28706
Closed
yaooqinn wants to merge 4 commits into
Closed
[SPARK-31892][SQL] Disable week-based date filed for parsing#28706yaooqinn wants to merge 4 commits into
yaooqinn wants to merge 4 commits into
Conversation
Uh oh!
There was an error while loading. Please reload this page.
Uh oh!
There was an error while loading. Please reload this page.
Uh oh!
There was an error while loading. Please reload this page.
| - Symbols of 'Y', 'W', 'w', 'E', 'u', 'F' can only be used for datetime formatting, e.g. `date_format`. | ||
| More details for the text style: |
Contributor
There was a problem hiding this comment.
not related to this PR, but can we embed this section into Text: ...?
SparkQA
commented
Jun 2, 2020
Test build #123429 has finished for PR 28706 at commit
|
SparkQA
commented
Jun 2, 2020
Test build #123430 has finished for PR 28706 at commit
|
SparkQA
commented
Jun 2, 2020
Test build #123432 has finished for PR 28706 at commit
|
yaooqinn
commented
Jun 2, 2020
MemberAuthor
retest this please |
SparkQA
commented
Jun 2, 2020
Test build #123440 has finished for PR 28706 at commit
|
cloud-fan
approved these changes
Jun 3, 2020
SparkQA
commented
Jun 3, 2020
Test build #123455 has finished for PR 28706 at commit
|
cloud-fan
commented
Jun 3, 2020
Contributor
thanks, merging to master/3.0! |
cloud-fan pushed a commit
that referenced
this pull request
Jun 3, 2020
This PR disables week-based date filed for parsing closes#28674 1. It's an un-fixable behavior change to fill the gap between SimpleDateFormat and DateTimeFormater and backward-compatibility for different JDKs.A lot of effort has been made to prove it at #28674 2. The existing behavior itself in 2.4 is confusing, e.g. ```sql spark-sql> select to_timestamp('1', 'w'); 1969-12-28 00:00:00 spark-sql> select to_timestamp('1', 'u'); 1970-01-05 00:00:00 ``` The 'u' here seems not to go to the Monday of the first week in week-based form or the first day of the year in non-week-based form but go to the Monday of the second week in week-based form. And, e.g. ```sql spark-sql> select to_timestamp('2020 2020', 'YYYY yyyy'); 2020-01-01 00:00:00 spark-sql> select to_timestamp('2020 2020', 'yyyy YYYY'); 2019-12-29 00:00:00 spark-sql> select to_timestamp('2020 2020 1', 'YYYY yyyy w'); NULL spark-sql> select to_timestamp('2020 2020 1', 'yyyy YYYY w'); 2019-12-29 00:00:00 ``` I think we don't need to introduce all the weird behavior from Java 3. The current test coverage for week-based date fields is almost 0%, which indicates that we've never imagined using it. 4. Avoiding JDK bugs https://issues.apache.org/jira/browse/SPARK-31880 Yes, the 'Y/W/w/u/F/E' pattern cannot be used datetime parsing functions. more tests added Closes#28706 from yaooqinn/SPARK-31892. Authored-by: Kent Yao <yaooqinn@hotmail.com> Signed-off-by: Wenchen Fan <wenchen@databricks.com> (cherry picked from commit afe95bd) Signed-off-by: Wenchen Fan <wenchen@databricks.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for freeto join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
What changes were proposed in this pull request?
This PR disables week-based date filed for parsing
closes#28674
Why are the changes needed?
It's an un-fixable behavior change to fill the gap between SimpleDateFormat and DateTimeFormater and backward-compatibility for different JDKs.A lot of effort has been made to prove it at [SPARK-31868][SQL] Restore the parsing behaviour week-based-year for 2.4 #28674
The existing behavior itself in 2.4 is confusing, e.g.
The 'u' here seems not to go to the Monday of the first week in week-based form or the first day of the year in non-week-based form but go to the Monday of the second week in week-based form.
And, e.g.
I think we don't need to introduce all the weird behavior from Java
The current test coverage for week-based date fields is almost 0%, which indicates that we've never imagined using it.
Avoiding JDK bugs
https://issues.apache.org/jira/browse/SPARK-31880
Does this PR introduce any user-facing change?
Yes, the 'Y/W/w/u/F/E' pattern cannot be used datetime parsing functions.
How was this patch tested?
more tests added