oceanbase/miniob

support show variable

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#542 opened on Apr 7, 2025

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 (2 comments) (0 reactions) (1 assignee)C++ (1,622 forks)auto 404
enhancementhelp wanted

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Description

Enhancement currently, miniob only support set variable.

set sql_debug=0;

you should support show variable in miniob. for example:

SELECT * FROM INFORMATION_SCHEMA.SESSION_VARIABLES WHERE VARIABLE_NAME = 'sql_debug';
SHOW VARIABLES LIKE 'sql_debug';
+------------------+-------------+
| Variable_name    | Value       |
+------------------+-------------+
| sql_debug        | true        |
+------------------+-------------+

Contributor guide

Research direction
Examine the implementation of SET variable to understand the variable storage and session context, then extend it to support SHOW VARIABLES and INFORMATION SCHEMA.SESSION VARIABLES queries.
Tech stack
sql
Domain
backenddatabase
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C++SQLDatabase fundamentals
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60