FlyingZC commented 1 year ago

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:

INSERT INTO remote_table@link as SELECT * FROM local_table;

LOCK TABLE interval_sales
PARTITION FOR (TO_DATE('01-JUN-2007','dd-MON-yyyy'))
IN SHARE MODE;

ALTER TABLE interval_sales
EXCHANGE PARTITION FOR (TO_DATE('01-JUN-2007','dd-MON-yyyy'))
WITH TABLE interval_sales_jun_2007
INCLUDING INDEXES;

LOCK TABLE orders PARTITION FOR (TO_DATE('01-MAR-2007','dd-MON-yyyy')) 
IN SHARE MODE;

ALTER TABLE orders
EXCHANGE PARTITION
FOR (TO_DATE('01-MAR-2007','dd-MON-yyyy'))
WITH TABLE orders_mar_2007
WITH VALIDATION;

LOCK TABLE transactions PARTITION FOR(TO_DATE('31-JAN-2007','dd-MON-yyyy') IN SHARE MODE;

MAXLOGFILES 5 
MAXLOGHISTORY 100 
MAXDATAFILES 10 
MAXINSTANCES 2 
ARCHIVELOG
CHARACTER SET WE8ISO8859P1
NATIONAL CHARACTER SET AL16UTF16 
DATAFILE

Process

First confirm that this is a correct oracle sql syntax, if not please ignore;
Compare SQL definitions in Oficial SQL Doc and ShardingSphere SQL Doc;
If there is any difference in ShardingSphere SQL Doc, please correct them by referring to the Official SQL Doc;
Run mvn install the current_file_module;
Check whether there are any exceptions. If indeed, please fix them. (Especially xxxVisitor.class);
Add new corresponding SQL case in SQL Cases and expected parsed result in Expected Statment XML;
Run SQLParserParameterizedTest to make sure no exceptions.