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https://issues.apache.org/jira/browse/SPARK-29784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16969272#comment-16969272
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Yuming Wang commented on SPARK-29784:
-------------------------------------
Thank you [~pavithraramachandran]. We changed our non-standard syntax of trim
function in https://github.com/apache/spark/pull/24902 from {{TRIM(trimStr,
str)}} to {{TRIM(str, trimStr)}} to be compatible with other databases.
> Built in function trim is not compatible in 3.0 with previous version
> ---------------------------------------------------------------------
>
> Key: SPARK-29784
> URL: https://issues.apache.org/jira/browse/SPARK-29784
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: ABHISHEK KUMAR GUPTA
> Priority: Major
>
> SELECT trim('SL', 'SSparkSQLS'); returns empty in Spark 3.0 where as in 2.4
> and 2.3.2 is returning after leading and trailing character removed.
> Spark 3.0 – Not correct
> jdbc:hive2://10.18.19.208:23040/default> SELECT trim('SL', 'SSparkSQLS');
> +-----------------------+
> | trim(SL, SSparkSQLS) |
> +-----------------------+
> | |
> +-----------------------
> Spark 2.4 – Correct
> jdbc:hive2://10.18.18.214:23040/default> SELECT trim('SL', 'SSparkSQLS');
> +-----------------------+--+
> | trim(SSparkSQLS, SL) |
> +-----------------------+--+
> | parkSQ |
> +-----------------------+--+
>
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