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From "Yury Gerzhedovich (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-11434) SQL: Create a view with list of existing COLUMNS
Date Mon, 01 Apr 2019 13:15:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-11434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16806740#comment-16806740
] 

Yury Gerzhedovich commented on IGNITE-11434:
--------------------------------------------

[~tledkov-gridgain], I've added some points to review. Let's discuss

> SQL: Create a view with list of existing COLUMNS
> ------------------------------------------------
>
>                 Key: IGNITE-11434
>                 URL: https://issues.apache.org/jira/browse/IGNITE-11434
>             Project: Ignite
>          Issue Type: Task
>          Components: sql
>            Reporter: Yury Gerzhedovich
>            Assignee: Taras Ledkov
>            Priority: Major
>              Labels: iep-29
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> Need to expose SQL system view with COLUMNS information.
> Need to investigate more deeper which of information should be there.
>  
> As start point we can take [https://dev.mysql.com/doc/refman/8.0/en/columns-table.html] 
> Columns description:
> || Name || Type || Description||
> |  SCHEMA_NAME | string | Schema name |
> | TABLE_NAME | string | Table name |
> | COLUMN_NAME | string | Columns name | 
> | DATA_TYPE | string | SQL data type |
> | IS_NULLABLE | boolean | Nullable flag corresponds to {{QueryEntity#setNotNullFields}}
|
> | DISPLAY_SIZE| int | Size (e.g. for VARCHAR) |
> | PRECISION | int | Precision |
> | SCALE |  int | Scale |
> | AFFINITY_KEY | boolean | {{true}} whan the column is affinity key |



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