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https://issues.apache.org/jira/browse/FLINK-20977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17269921#comment-17269921
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孙铮 commented on FLINK-20977:
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[~jark] I created a `mod` table and executed it successfully with the
"desc`mod`" command.
So I compared "use `mod`" and "desc `mod` two commands, and tracked the code
execution flow of the two commands and found Is in the
org.apache.flink.table.client.cli.SqlCommandParser#parseByRegexMatching
cmd.hasRegexPattern() method to judge regular expression
org.apache.flink.table.client.cli.SqlCommandParser.SqlCommand#USE
org.apache.flink.table.client.cli.SqlCommandParser.SqlCommand#DESC
> can not use `use` command to switch database
> ---------------------------------------------
>
> Key: FLINK-20977
> URL: https://issues.apache.org/jira/browse/FLINK-20977
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Affects Versions: 1.12.0
> Reporter: Jun Zhang
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.13.0
>
>
> I have a database which name is mod, when I use `use mod` to switch to the
> db,the system throw an exception, I surround it with backticks ,it is still
> not well
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