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https://issues.apache.org/jira/browse/COMDEV-385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17262388#comment-17262388
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Thanoshan MV commented on COMDEV-385:
-------------------------------------
Hi Juan Pan,
I'm Thanoshan. I'm 3rd year undergraduate at Sabaragamuwa University of Sri
Lanka. I've studied the documentation you've given above and I'm really
interested in this issue to complete as my GSoC 2021 project. Could you please
help me get started on this issue?
Thank you,
Thanoshan.
> Apache ShardingSphere: Proofread the SQL definitions for ShardingSphere Parser
> ------------------------------------------------------------------------------
>
> Key: COMDEV-385
> URL: https://issues.apache.org/jira/browse/COMDEV-385
> Project: Community Development
> Issue Type: Improvement
> Components: GSoC/Mentoring ideas
> Reporter: Juan Pan
> Priority: Major
> Labels: Mentor, ShardingSphere, gsoc2021
>
> h3. Apache ShardingSphere
> Apache ShardingSphere is a distributed database middleware ecosystem,
> including 2 independent products, ShardingSphere JDBC and ShardingSphere
> Proxy presently. They all provide functions of data sharding, distributed
> transaction, and database orchestration.
> *Page*:
> [https://shardingsphere.apache.org|https://shardingsphere.apache.org/]
> *Github*: [https://github.com/apache/shardingsphere]
> h3. Background
> ShardingSphere parser engine helps users parse a SQL to get the AST (Abstract
> Syntax Tree) and visit this tree to get SQLStatement (Java Object). At
> present, this parser engine can handle SQLs for `MySQL`, `PostgreSQL`,
> `SQLServer` and `Oracle`, which means we have to understand different
> database dialect SQLs.
> *More details*:
> [https://shardingsphere.apache.org/document/current/en/features/sharding/principle/parse/]
> h3. Task
> This issue is to proofread the DML(SELECT/UPDATE/DELETE/INSERT) SQL
> definitions for Oracle. As we have a basic [Oracle SQL syntax
> definitions|https://github.com/apache/shardingsphere/tree/master/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/antlr4/imports/oracle]
> but do not keep in line with [Oracle
> DOC|https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlqr/SQL-Statements.html#GUID-CE009C87-4AA6-45BF-9A0D-2B2C5FFB47B3],
> we need you to find out the vague SQL grammar definitions and correct them
> referring to Oracle DOC.
> *Notice*, when you review these DML(SELECT/UPDATE/DELETE/INSERT) SQLs, you
> will find that these definitions will involve some basic elements of Oracle
> SQL. No doubt, these elements are included in this task as well.
> h3. Relevant Skills
> 1. Master JAVA language
> 2. Have a basic understanding of Antlr g4 file
> 3. Be familiar with Oracle SQLs
> h3. Targets files
> 1. DML SQLs g4 file:
> [https://github.com/apache/shardingsphere/blob/master/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/antlr4/imports/oracle/DMLStatement.g4]
> 2. Basic elements g4 file:
> [https://github.com/apache/shardingsphere/blob/master/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/antlr4/imports/oracle/BaseRule.g4]
> h3. References
> 1. Oracle SQL quick reference:
> [https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlqr/SQL-Statements.html#GUID-1FA35EAD-AED2-4619-BFEE-348FF05D1F4A]
> 2. Detailed Oracle SQL info:
> [https://docs.oracle.com/pls/topic/lookup?ctx=en/database/oracle/oracle-database/19/sqlqr&id=SQLRF008]
> h3. Mentor
> Juan Pan, PMC of Apache ShardingSphere, [mailto:panj...@apache.org]
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