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The following commit(s) were added to refs/heads/master by this push:
new 1c8526d [SPARK-28093][FOLLOW-UP] Remove migration guide of TRIM
changes
1c8526d is described below
commit 1c8526dc87212b7a51fddf5f180bc8387805e4d0
Author: gatorsmile <[email protected]>
AuthorDate: Fri Mar 13 11:45:59 2020 +0900
[SPARK-28093][FOLLOW-UP] Remove migration guide of TRIM changes
### What changes were proposed in this pull request?
Since we reverted the original change in
https://github.com/apache/spark/pull/27540, this PR is to remove the
corresponding migration guide made in the commit
https://github.com/apache/spark/pull/24948
### Why are the changes needed?
N/A
### Does this PR introduce any user-facing change?
N/A
### How was this patch tested?
N/A
Closes #27896 from gatorsmile/SPARK-28093Followup.
Authored-by: gatorsmile <[email protected]>
Signed-off-by: HyukjinKwon <[email protected]>
---
docs/sql-migration-guide.md | 2 --
1 file changed, 2 deletions(-)
diff --git a/docs/sql-migration-guide.md b/docs/sql-migration-guide.md
index 468dcdb..7cca43e 100644
--- a/docs/sql-migration-guide.md
+++ b/docs/sql-migration-guide.md
@@ -34,8 +34,6 @@ license: |
- Since Spark 3.0, configuration `spark.sql.crossJoin.enabled` become
internal configuration, and is true by default, so by default spark won't raise
exception on sql with implicit cross join.
- - Since Spark 3.0, we reversed argument order of the trim function from
`TRIM(trimStr, str)` to `TRIM(str, trimStr)` to be compatible with other
databases.
-
- In Spark version 2.4 and earlier, SQL queries such as `FROM <table>` or
`FROM <table> UNION ALL FROM <table>` are supported by accident. In hive-style
`FROM <table> SELECT <expr>`, the `SELECT` clause is not negligible. Neither
Hive nor Presto support this syntax. Therefore we will treat these queries as
invalid since Spark 3.0.
- Since Spark 3.0, the Dataset and DataFrame API `unionAll` is not
deprecated any more. It is an alias for `union`.
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