[SPARK-28321][DOCS][FOLLOW-UP] Update migration guide by 0-args Java UDF's internal behaviour change #25224
Conversation
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
Member
Author
|
cc @gatorsmile and @cloud-fan |
|
Test build #107983 has finished for PR 25224 at commit
|
HyukjinKwon
commented
Jul 22, 2019
| - Since Spark 3.0, substitution order of nested WITH clauses is changed and an inner CTE definition takes precedence over an outer. In version 2.4 and earlier, `WITH t AS (SELECT 1), t2 AS (WITH t AS (SELECT 2) SELECT * FROM t) SELECT * FROM t2` returns `1` while in version 3.0 it returns `2`. The previous behaviour can be restored by setting `spark.sql.legacy.ctePrecedence.enabled` to `true`. | ||
|
|
||
| - Since Spark 3.0, the `add_months` function does not adjust the resulting date to a last day of month if the original date is a last day of months. For example, `select add_months(DATE'2019-02-28', 1)` results `2019-03-28`. In Spark version 2.4 and earlier, the resulting date is adjusted when the original date is a last day of months. For example, adding a month to `2019-02-28` resultes in `2019-03-31`. | ||
| - Since Spark 3.0, the `add_months` function does not adjust the resulting date to a last day of month if the original date is a last day of months. For example, `select add_months(DATE'2019-02-28', 1)` results `2019-03-28`. In Spark version 2.4 and earlier, the resulting date is adjusted when the original date is a last day of months. For example, adding a month to `2019-02-28` results in `2019-03-31`. |
Member
Author
There was a problem hiding this comment.
Just a typo fix from resultes -> results.
|
Test build #107985 has finished for PR 25224 at commit
|
Contributor
|
thanks, merging to master! |
yiheng
pushed a commit
to yiheng/spark
that referenced
this pull request
Jul 24, 2019
…UDF's internal behaviour change ## What changes were proposed in this pull request? This PR proposes to add a note in the migration guide. See apache#25108 (comment) ## How was this patch tested? N/A Closes apache#25224 from HyukjinKwon/SPARK-28321-doc. Lead-authored-by: HyukjinKwon <[email protected]> Co-authored-by: Hyukjin Kwon <[email protected]> Signed-off-by: Wenchen Fan <[email protected]>
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
4 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 proposes to add a note in the migration guide. See #25108 (comment)
How was this patch tested?
N/A