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https://issues.apache.org/jira/browse/SPARK-17647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16295261#comment-16295261
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Dong Jiang commented on SPARK-17647:
------------------------------------
Are we sure this issue is resolved, I tested the following on spark-shell 2.2.0
{code}
Welcome to
____ __
/ __/__ ___ _____/ /__
_\ \/ _ \/ _ `/ __/ '_/
/___/ .__/\_,_/_/ /_/\_\ version 2.2.0
/_/
Using Scala version 2.11.8 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_25)
Type in expressions to have them evaluated.
Type :help for more information.
scala> spark.sql("select '\\\\' like '%\\%'").show
+----------+
|\ LIKE %\%|
+----------+
| false|
+----------+
{code}
same in spark-sql
{code}
spark-sql> select '\\\\' like '%\\%';
false
Time taken: 2.296 seconds, Fetched 1 row(s)
{code}
> SQL LIKE does not handle backslashes correctly
> ----------------------------------------------
>
> Key: SPARK-17647
> URL: https://issues.apache.org/jira/browse/SPARK-17647
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Xiangrui Meng
> Assignee: Xiangrui Meng
> Labels: correctness
> Fix For: 2.1.1, 2.2.0
>
>
> Try the following in SQL shell:
> {code}
> select '\\\\' like '%\\%';
> {code}
> It returned false, which is wrong.
> cc: [~yhuai] [~joshrosen]
> A false-negative considered previously:
> {code}
> select '\\\\' rlike '.*\\\\\\\\.*';
> {code}
> It returned true, which is correct if we assume that the pattern is treated
> as a Java string but not raw string.
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