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https://issues.apache.org/jira/browse/HIVE-1977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13250180#comment-13250180
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Zhenxiao Luo commented on HIVE-1977:
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currently the following is working:
1. $describe table;
2. $describe table.column;
while, these are not working:
3. $describe column;
4. $describe database.table;
5. $describe database.table.column;
always errors about the starting element is not a valid Table.
Hive should support #3 and #5, since these are standard syntax, by updating
Hive.g and related parser/lexer.
For #4, a new configuration property may be needed to distinguish #2 with #4.
Or, shall we always try matching both #2 and #4 when doing parsing? And error
out if and only if neither matches? In this way, no new configuration property
needed.
This is also related to HIVE-2228.
> DESCRIBE TABLE syntax doesn't support specifying a database qualified table
> name
> --------------------------------------------------------------------------------
>
> Key: HIVE-1977
> URL: https://issues.apache.org/jira/browse/HIVE-1977
> Project: Hive
> Issue Type: Bug
> Components: Database/Schema, Query Processor, SQL
> Reporter: Carl Steinbach
> Assignee: Zhenxiao Luo
>
> The syntax for DESCRIBE is broken. It should be:
> {code}
> DESCRIBE [EXTENDED] [database DOT]table [column]
> {code}
> but is actually
> {code}
> DESCRIBE [EXTENDED] table[DOT col_name]
> {code}
> Ref: http://dev.mysql.com/doc/refman/5.0/en/describe.html
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