[GitHub] [shardingsphere] FlyingZC opened a new issue, #27062: Support parsing Oracle CREATE OR sql

["FlyingZC (via GitHub)" <gi...@apache.org>]

FlyingZC opened a new issue, #27062:
URL: https://github.com/apache/shardingsphere/issues/27062

   # Background
   Hi community,
   This issue is for #26878.
   
   ShardingSphere parser engine helps users parse a SQL to get the AST (Abstract Syntax Tree) and visit this tree to get SQLStatement (Java Object). Currently, we are planning to enhance the support for Oracle SQL parsing in ShardingSphere.
   
   More details:
   https://shardingsphere.apache.org/document/current/en/reference/sharding/parse/
   
   # Task
   This issue is to support more oracle sql parse, as follows:
   ```sql
   CREATE OR REPLACE OPERATOR position_between
      BINDING (NUMBER, NUMBER, NUMBER) RETURN NUMBER 
      WITH INDEX CONTEXT, SCAN CONTEXT position_im
      USING function_for_position_between;
   ```
   
   ```sql
   CREATE OR REPLACE OUTLINE public_salaries 
      FROM PRIVATE my_salaries;
   ```
   
   ```sql
   CREATE OR REPLACE PACKAGE BODY banking AS
     FUNCTION balance (acct_id INTEGER) RETURN REAL IS
       PRAGMA AUTONOMOUS_TRANSACTION;
       my_bal  REAL;
     BEGIN
       SELECT balance INTO my_bal FROM accounts WHERE account=acct_id;
       RETURN my_bal;
     END;
     -- Additional functions and packages
   END banking;
   ```
   
   ```sql
   CREATE OR REPLACE FUNCTION text_length(a CLOB) 
      RETURN NUMBER DETERMINISTIC IS
   BEGIN 
     RETURN DBMS_LOB.GETLENGTH(a);
   END;
   ```
   
   ```sql
   CREATE OR REPLACE PACKAGE test_package AS
     var1 CHAR(5);
   END;
   ```
   
   # Process
   1. First confirm that this is a correct oracle sql syntax, if not please ignore;
   2. Compare SQL definitions in Oficial SQL Doc and ShardingSphere SQL Doc;
   3. If there is any difference in ShardingSphere SQL Doc, please correct them by referring to the Official SQL Doc;
   4. Run mvn install the current_file_module;
   5. Check whether there are any exceptions. If indeed, please fix them. (Especially xxxVisitor.class);
   6. Add new corresponding SQL case in SQL Cases and expected parsed result in Expected Statment XML;
   7. Run SQLParserParameterizedTest to make sure no exceptions.
   
   # Relevant Skills
   1. Master JAVA language
   2. Have a basic understanding of Antlr `g4` file
   3. Be familiar with Oracle SQLs


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[GitHub] [shardingsphere] FlyingZC closed issue #27062: Support parsing Oracle CREATE OR sql

["FlyingZC (via GitHub)" <gi...@apache.org>]

FlyingZC closed issue #27062: Support parsing Oracle CREATE OR sql
URL: https://github.com/apache/shardingsphere/issues/27062


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