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https://issues.apache.org/jira/browse/FLINK-10145?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16586920#comment-16586920
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ASF GitHub Bot commented on FLINK-10145:
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Guibo-Pan commented on a change in pull request #6576: [FLINK-10145][table] Add
replace supported in TableAPI and SQL
URL: https://github.com/apache/flink/pull/6576#discussion_r211475986
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/functions/sql/ScalarSqlFunctions.scala
##########
@@ -67,6 +67,14 @@ object ScalarSqlFunctions {
OperandTypes.ONE_OR_MORE,
SqlFunctionCategory.STRING)
+ val REPLACE = new SqlFunction(
Review comment:
I use SqlStdOperatorTable.REPLACE at first, however that REPLACE function
can not handle null params, so I create a new function which refer to
SqlStdOperatorTable.REPLACE.
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> Add replace supported in TableAPI and SQL
> -----------------------------------------
>
> Key: FLINK-10145
> URL: https://issues.apache.org/jira/browse/FLINK-10145
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Reporter: Guibo Pan
> Assignee: Guibo Pan
> Priority: Major
> Labels: pull-request-available
>
> replace is an useful function for String.
> for example:
> {code:java}
> select replace("Hello World", "World", "Flink") // return "Hello Flink"
> select replace("ababab", "abab", "z") // return "zab"
> {code}
> It is supported as a UDF in Hive, more details please see[1]
> [1]:
> https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-StringFunctions
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