Support parsing Oracle DROP TABLESPACE sql

[FlyingZC]

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:

DROP TABLESPACE users INCLUDING CONTENTS AND DATAFILES;

DROP TABLESPACE users INCLUDING CONTENTS;

DROP TYPE BODY data_typ1;

DROP TYPE employee_typ FORCE; -- if previously created
CREATE TYPE employee_typ UNDER person_typ (
   emp_id NUMBER, 
   mgr VARCHAR2(30));

DROP TYPE location_typ FORCE;
-- above necessary if you have previously created object
CREATE OR REPLACE TYPE location_typ AS OBJECT (
  building_no  NUMBER,
  city         VARCHAR2(40),
  ORDER MEMBER FUNCTION match (l location_typ) RETURN INTEGER );/
CREATE OR REPLACE TYPE BODY location_typ AS 
  ORDER MEMBER FUNCTION match (l location_typ) RETURN INTEGER IS 
  BEGIN 
    IF building_no < l.building_no THEN
      RETURN -1;               -- any negative number will do
    ELSIF building_no > l.building_no THEN 
      RETURN 1;                -- any positive number will do
    ELSE 
      RETURN 0;
    END IF;
  END;
END;/

-- invoking match method
DECLARE
loc location_typ;
secloc location_typ;
a number;

BEGIN
 loc :=NEW location_typ(300, 'San Francisco');
 secloc :=NEW location_typ(200, 'Redwood Shores');
 a := loc.match(secloc);

DBMS_OUTPUT.PUT_LINE('order (1 is greater, -1 is lesser):' ||a); -- prints order:1 
 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

[boyjoy1127]

I'd like to support this issue.

[github-actions[bot]]

There hasn't been any activity on this issue recently, and in order to prioritize active issues, it will be marked as stale.

[github-actions[bot]]

There hasn't been any activity on this issue recently, and in order to prioritize active issues, it will be marked as stale.