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https://issues.apache.org/jira/browse/FLINK-9991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16561287#comment-16561287
]
ASF GitHub Bot commented on FLINK-9991:
---------------------------------------
TisonKun commented on a change in pull request #6450: [FLINK-9991] Add
regex_replace supported in TableAPI and SQL
URL: https://github.com/apache/flink/pull/6450#discussion_r205989801
##########
File path:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/expressions/ScalarFunctionsTest.scala
##########
@@ -450,6 +450,39 @@ class ScalarFunctionsTest extends ScalarTypesTestBase {
"1111111111111111111111111111111111111111111111111111111111111111")
}
+ @Test
+ def testRegexReplace(): Unit = {
+ testAllApis(
+ "foobar".regexReplace("oo|ar", ""),
+ "'foobar'.regexReplace('oo|ar', '')",
+ "regex_replace('foobar', 'oo|ar', '')",
+ "fb")
+
+ testAllApis(
+ "foobar".regexReplace("oo|ar", "abc"),
+ "'foobar'.regexReplace('oo|ar', 'abc')",
+ "regex_replace('foobar', 'oo|ar', 'abc')",
+ "fabcbabc")
+
+ testAllApis(
+ 'f33.regexReplace("oo|ar", ""),
+ "f33.regexReplace('oo|ar', '')",
+ "REGEX_REPLACE(f33, 'oo|ar', '')",
+ "null")
+
+ testAllApis(
+ "foobar".regexReplace('f33, ""),
+ "'foobar'.regexReplace(f33, '')",
+ "REGEX_REPLACE('foobar', f33, '')",
+ "null")
+
+ testAllApis(
+ "foobar".regexReplace("oo|ar", 'f33),
+ "'foobar'.regexReplace('oo|ar', f33)",
+ "REGEX_REPLACE('foobar', 'oo|ar', f33)",
+ "null")
+ }
+
Review comment:
what about `"fooor".regexReplace("oo", "")`? is it `"for"` or `"fr"`? the
problem is what about the complicated/corner case, which maybe worth a test to
cover it.
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> Add regex_replace supported in TableAPI and SQL
> -----------------------------------------------
>
> Key: FLINK-9991
> URL: https://issues.apache.org/jira/browse/FLINK-9991
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Reporter: vinoyang
> Assignee: vinoyang
> Priority: Minor
> Labels: pull-request-available
>
> regexp_replace is a very userful function to process String.
> For example :
> {code:java}
> regexp_replace("foobar", "oo|ar", "") //returns 'fb.'
> {code}
> It is supported as a UDF in Hive, more details please see[1].
> [1]: https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF
>
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