[jira] [Assigned] (IOTDB-5649) Refactor ExpressionAnalyzer using visitor pattern

["LiYuheng (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IOTDB-5649?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

LiYuheng reassigned IOTDB-5649:
-------------------------------

    Assignee: LiYuheng  (was: Minghui Liu)

> Refactor ExpressionAnalyzer using visitor pattern
> -------------------------------------------------
>
>                 Key: IOTDB-5649
>                 URL: https://issues.apache.org/jira/browse/IOTDB-5649
>             Project: Apache IoTDB
>          Issue Type: Improvement
>            Reporter: Minghui Liu
>            Assignee: LiYuheng
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: master branch
>
>
> ExpressionAnalyzer is the class in charge of handling expressions.
> Each method in this class has different ability, such as searchSourceExpressions() finds out which sources the expression contains, removeWildcardInExpression() remove * from expression, and so on.
> There were some redundant logic in ExpressionAnalyzer's methods. To make it easier to add new kinds of expressions, it's necessary to simplify.
> After analyze the similarity between these methods, I believe the visitor pattern is a good way to make it simple. The same logic can be contained in superclass-visitor, and the difference can be implemented by subclass-visitor's override.



--
This message was sent by Atlassian Jira
(v8.20.10#820010)