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https://issues.apache.org/jira/browse/PHOENIX-5543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17390459#comment-17390459
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ASF GitHub Bot commented on PHOENIX-5543:
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richardantal opened a new pull request #1278:
URL: https://github.com/apache/phoenix/pull/1278
This patch adds new SQL grammar like following
- SHOW SCHEMAS [like '<pattern>']
- SHOW TABLES [IN <schema>] [like '<pattern']
Example invocations:
- show schemas
- show scemas like 'SYS%'
- show tables
- show tables in SYSTEM
- show tables in SYSTEM like 'CAT%'
The current way of fetching this information is by using
!tables and !schemas via sqlline JDBC support but that is
not flexible enough for the end users to add more fitlers.
This approach is more inline with what other databases do.
Added test coverage in parser tests and core e2e tests.
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> Implement show schemas / show tables SQL commands
> -------------------------------------------------
>
> Key: PHOENIX-5543
> URL: https://issues.apache.org/jira/browse/PHOENIX-5543
> Project: Phoenix
> Issue Type: Improvement
> Affects Versions: 4.15.0, 5.1.0
> Reporter: Bharath Vissapragada
> Assignee: Bharath Vissapragada
> Priority: Minor
> Fix For: 5.1.0, 4.16.1, 4.17.0
>
> Attachments: PHOENIX-5543-4.x.v1.patch, PHOENIX-5543.master.v1.patch,
> PHOENIX-5543.master.v2.patch, PHOENIX-5543.master.v3.patch
>
> Time Spent: 3h 40m
> Remaining Estimate: 0h
>
> Currently users rely on {{!tables}} and {{!schemas}} commands provided by
> sqlline which pulls the information using the standard JDBC metadata calls
> like {{getTables()}} and {{getSchemas()}}.
> Most other databases (like mysql[1,2]) implement these as first class SQL
> commands that gives the user more flexibility in querying by adding necessary
> filters and looking up for table information in specific schemas. The ask
> here is to implement the following SQL commands.
> {noformat}
> SHOW SCHEMAS [LIKE '<pattern>']
> SHOW TABLES [IN <schema>] [LIKE '<pattern>']
> {noformat}
> [1] https://dev.mysql.com/doc/refman/8.0/en/show-tables.html
> [2] https://dev.mysql.com/doc/refman/8.0/en/show-databases.html
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