[jira] [Created] (PHOENIX-5543) Implement show schemas / show tables SQL commands

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

Bharath Vissapragada created PHOENIX-5543:
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             Summary: 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


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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