Support ShardingSphere parser of openGauss sql

Hi, I think we can support parsing more SQLs for openGauss(version 3.0.0).

Background

How is a SQL parsed? SQL definition file ->(Parse to) AST ->(Visit it) SQLStatment

Process

1. Compare SQL definitions in Oficial SQL Doc and ShardingSphere SQL Doc
2. If there is any difference in ShardingSphere SQL Doc, please correct them referring to Official SQL Doc
3. Run mvn install the current_file_module
4. Check whether there are any exceptions. If indeed, please fix them. (Especially xxxVisitor.class)
5. Add new corresponding SQL case in SQL Cases and expected parsed result in Expected Statment XML
6. Run SQLParserParameterizedTest to make sure no exceptions.

Notice

1. Left recursion can not work well in Antlr4,

a
  : b
  | a b
  ;
b
  : a c
  ;
c
  : ...
  ;

you can consider the following one,

a
  : b*
  ;
b
  : a c
  ;
c
  : ...
  ;

1. Here is a Chinese version for reference.

Subtask

• ABORT
• ALTER AGGREGATE
• ALTER AUDIT POLICY
• ALTER DATABASE
• ALTER DATA SOURCE
• ALTER DEFAULT PRIVILEGES
• ALTER DIRECTORY
• ALTER EXTENSION
• ALTER FOREIGN TABLE
• ALTER FUNCTION
• ALTER GROUP
• ALTER INDEX
• ALTER LANGUAGE
• ALTER LARGE OBJECT
• ALTER MASKING POLICY
• ALTER MATERIALIZED VIEW
• ALTER OPERATOR
• ALTER PUBLICATION
• ALTER PACKAGE
• ALTER RESOURCE LABEL
• ALTER RESOURCE POOL
• ALTER ROLE
• ALTER ROW LEVEL SECURITY POLICY
• ALTER SCHEMA
• ALTER SEQUENCE
• ALTER SERVER
• ALTER SESSION
• ALTER SUBSCRIPTION
• ALTER SYNONYM
• ALTER SYSTEM KILL SESSION
• ALTER SYSTEM SET
• ALTER TABLE
• ALTER TABLE PARTITION
• ALTER TABLE SUBPARTITION
• ALTER TABLESPACE
• ALTER TEXT SEARCH CONFIGURATION
• ALTER TEXT SEARCH DICTIONARY
• ALTER TRIGGER
• ALTER TYPE
• ALTER USER
• ALTER USER MAPPING
• ALTER VIEW
• ANALYZE | ANALYSE
• BEGIN
• CALL
• CHECKPOINT
• CLEAN CONNECTION
• CLOSE
• CLUSTER
• COMMENT
• COMMIT | END
• COMMIT PREPARED
• COPY
• CREATE AGGREGATE
• CREATE AUDIT POLICY
• CREATE CAST
• CREATE CLIENT MASTER KEY
• CREATE COLUMN ENCRYPTION KEY
• CREATE DATABASE
• CREATE DATA SOURCE
• CREATE DIRECTORY
• CREATE EXTENSION
• CREATE FOREIGN TABLE
• CREATE FUNCTION
• CREATE GROUP
• CREATE INCREMENTAL MATERIALIZED VIEW
• CREATE INDEX
• CREATE LANGUAGE
• CREATE MASKING POLICY
• CREATE MATERIALIZED VIEW
• CREATE MODEL
• CREATE OPERATOR
• CREATE PACKAGE
• CREATE PROCEDURE
• CREATE PUBLICATION
• CREATE RESOURCE LABEL
• CREATE RESOURCE POOL
• CREATE ROLE
• CREATE ROW LEVEL SECURITY POLICY
• CREATE RULE
• CREATE SCHEMA
• CREATE SEQUENCE
• CREATE SERVER
• CREATE SUBSCRIPTION
• CREATE SYNONYM
• CREATE TABLE
• CREATE TABLE AS
• CREATE TABLE PARTITION
• CREATE TABLESPACE
• CREATE TABLE SUBPARTITION
• CREATE TEXT SEARCH CONFIGURATION
• CREATE TEXT SEARCH DICTIONARY
• CREATE TRIGGER
• CREATE TYPE
• CREATE USER
• CREATE USER MAPPING
• CREATE VIEW
• CREATE WEAK PASSWORD DICTIONARY
• CURSOR
• DEALLOCATE
• DECLARE
• DELETE
• DO
• DROP AGGREGATE
• DROP AUDIT POLICY
• DROP CAST
• DROP CLIENT MASTER KEY
• DROP COLUMN ENCRYPTION KEY
• DROP DATABASE
• DROP DATA SOURCE
• DROP DIRECTORY
• DROP EXTENSION
• DROP FOREIGN TABLE
• DROP FUNCTION
• DROP GROUP
• DROP INDEX
• DROP LANGUAGE
• DROP MASKING POLICY
• DROP MATERIALIZED VIEW
• DROP MODEL
• DROP OPERATOR
• DROP OWNED
• DROP PACKAGE
• DROP PROCEDURE
• DROP RESOURCE LABEL
• DROP RESOURCE POOL
• DROP ROLE
• DROP ROW LEVEL SECURITY POLICY
• DROP RULE
• DROP PUBLICATION
• DROP SCHEMA
• DROP SEQUENCE
• DROP SERVER
• DROP SUBSCRIPTION
• DROP SYNONYM
• DROP TABLE
• DROP TABLESPACE
• DROP TEXT SEARCH CONFIGURATION
• DROP TEXT SEARCH DICTIONARY
• DROP TRIGGER
• DROP TYPE
• DROP USER
• DROP USER MAPPING
• DROP VIEW
• DROP WEAK PASSWORD DICTIONARY
• EXECUTE
• EXPLAIN
• EXPLAIN PLAN
• FETCH
• GRANT
• INSERT
• LOCK
• MERGE INTO
• MOVE
• PREDICT BY
• PREPARE
• PREPARE TRANSACTION
• PURGE
• REASSIGN OWNED
• REFRESH INCREMENTAL MATERIALIZED VIEW
• REFRESH MATERIALIZED VIEW
• REINDEX
• RELEASE SAVEPOINT
• RESET
• REVOKE
• ROLLBACK
• ROLLBACK PREPARED
• ROLLBACK TO SAVEPOINT
• SAVEPOINT
• SELECT
• SELECT INTO
• SET
• SET CONSTRAINTS
• SET ROLE
• SET SESSION AUTHORIZATION
• SET TRANSACTION
• SHOW
• SHUTDOWN
• SNAPSHOT
• START TRANSACTION
• TIMECAPSULE TABLE
• TRUNCATE
• UPDATE
• VACUUM
• VALUES
• ALTER PROCEDURE
• ALTER GLOBAL CONFIGURATION
• DROP GLOBAL CONFIGURATION

[rajmunkhan]

I want to start working on

• CREATE AGGREGATE

[rajmunkhan]

Hey @strongduanmu, I also want to contribute to this task, can u also assign this to me? 😊