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From "Taras Ledkov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-11434) SQL: Create a view with list of existing COLUMNS
Date Wed, 06 Mar 2019 11:38:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-11434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16785534#comment-16785534
] 

Taras Ledkov commented on IGNITE-11434:
---------------------------------------

My proposal the set of columns of {{COLUMNS}} view:
|| 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 |
| COLUMN_KEY | string | null / PK / MUL according with MySQL semantic |
| AFFINITY_KEY | boolean | {{true}} whan the column is affinity key |

> 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
>
> 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] 



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