创建指定类型的对象
CREATE <object_type> [ IF NOT EXISTS ] <object_name> COMMENT ''
CREATE USER
CREATE ROLE
CREATE CONNECTION
CREATE EXTERNAL CATALOG
CREATE EXTERNAL FUNCTION
CREATE SCHEMA
CREATE EXTERNAL SCHEMA
CREATE SHARE
CREATE VCLUSTER
CREATE TABLE
CREATE EXTERNAL TABLE
CREATE VIEW
CREATE DYNAMIC TABLE
CREATE MATERIALIZED VIEW
CREATE BLOOMFILTER INDEX
CREATE TABLE STREAM
CREATE SYNONYM