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Posted to dev@community.apache.org by "Liangda Wang (Jira)" <ji...@apache.org> on 2021/03/06 18:28:00 UTC
[jira] [Commented] (COMDEV-399) Apache ShardingSphere: Proofread
the DDL/TCL SQL definitions for ShardingSphere Parser
[ https://issues.apache.org/jira/browse/COMDEV-399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17296623#comment-17296623 ]
Liangda Wang commented on COMDEV-399:
-------------------------------------
Hi [~panjuan],
my name is Liangda Wang and i'm a final year undergraduate business informatics student at University of Mannheim, Germany. I'm quite interested in taking this task for GSoC 2021 and contributing to ShardingSphere community:)
best,
Liangda
> Apache ShardingSphere: Proofread the DDL/TCL SQL definitions for ShardingSphere Parser
> --------------------------------------------------------------------------------------
>
> Key: COMDEV-399
> URL: https://issues.apache.org/jira/browse/COMDEV-399
> Project: Community Development
> Issue Type: Improvement
> Components: GSoC/Mentoring ideas
> Reporter: Juan Pan
> Priority: Major
> Labels: ShardingSphere, gsoc2021, mentor
>
> 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 following definitions,
> - All the DDL SQL definitions for Oracle *except for* ALTER, DROP, CREATE and TRUNCATE.
> - All the TCL (Transaction Control Language) SQL definitions for Oracle
> You can *learn more* [here|https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/Types-of-SQL-Statements.html#GUID-2E008D4A-F6FD-4F34-9071-7E10419CA24D].
> 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 target SQLs above, 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. DDL 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/DDLStatement.g4]
> 2. TCL 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/TCLStatement.g4]
> 3. 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, [panjuan@apache.org|mailto:panjuan@apache.org]
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