GitHub user bomeng opened a pull request:
https://github.com/apache/spark/pull/12206
[SPARK-14429] [SQL] Improve LIKE pattern in "SHOW TABLES / FUNCTIONS LIKE
<pattern>" DDL
## What changes were proposed in this pull request?
LIKE <pattern> is commonly used in SHOW TABLES / FUNCTIONS etc DDL. In the
pattern, user can use `|` or `*` as wildcards.
1. Currently, we used `replaceAll()` to replace `*` with `.*`, but the
replacement was scattered in several places; I have created an utility method
and use it in all the places;
2. Consistency with Hive: the pattern is case insensitive in Hive and white
spaces will be trimmed, but current pattern matching does not do that. For
example, suppose we have tables (t1, t2, t3), `SHOW TABLES LIKE ' T* ' ` will
list all the t-tables. Please use Hive to verify it.
I've made some changes to the utility method to make sure we will get the
same result as Hive does.
## How was this patch tested?
A new method was created in StringUtil and test cases were added.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/bomeng/spark SPARK-14429
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12206.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #12206
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commit b76ccd826a5c7780c73332e059cd31a8daee68a1
Author: bomeng <[email protected]>
Date: 2016-04-06T14:01:09Z
fix like pattern in show ddl
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