[jira] [Commented] (TAJO-401) Support '!=' operator

["Hyunsik Choi (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TAJO-401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13895570#comment-13895570 ] 

Hyunsik Choi commented on TAJO-401:
-----------------------------------

This issue looks reasonable. Many commercial RDBMS systems also support this 'NOT EQUAL' operator.

> Support '!=' operator
> ---------------------
>
>                 Key: TAJO-401
>                 URL: https://issues.apache.org/jira/browse/TAJO-401
>             Project: Tajo
>          Issue Type: Bug
>          Components: parser
>            Reporter: Jaehwa Jung
>              Labels: newbie
>             Fix For: 1.0-incubating
>
>
> If I write '!=' operator at where clause, TajoCli made a exception as follows:
> {code:xml}
> tajo> select * from table1 != 'a';
> Exception in thread "main" java.lang.IllegalArgumentException: != 'a';: event not found
> 	at jline.console.ConsoleReader.expandEvents(ConsoleReader.java:734)
> 	at jline.console.ConsoleReader.finishBuffer(ConsoleReader.java:604)
> 	at jline.console.ConsoleReader.accept(ConsoleReader.java:1912)
> 	at jline.console.ConsoleReader.readLine(ConsoleReader.java:2537)
> 	at jline.console.ConsoleReader.readLine(ConsoleReader.java:2162)
> 	at org.apache.tajo.cli.TajoCli.runShell(TajoCli.java:192)
> 	at org.apache.tajo.cli.TajoCli.main(TajoCli.java:721)
> {code}



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