1. execute_hg_select_sql
Execute a SELECT SQL query in Hologres database.
2. execute_hg_select_sql_with_serverless
Execute a SELECT SQL query in Hologres database with serverless computing.
3. execute_hg_dml_sql
Execute a DML (INSERT, UPDATE, DELETE) SQL query in Hologres database.
4. execute_hg_ddl_sql
Execute a DDL (CREATE, ALTER, DROP, COMMENT ON) SQL query in Hologres database.
5. gather_hg_table_statistics
Collect table statistics in Hologres database.
6. get_hg_query_plan
Get query plan in Hologres database.
7. get_hg_execution_plan
Get execution plan in Hologres database.
8. call_hg_procedure
Invoke a procedure in Hologres database.
9. create_hg_maxcompute_foreign_table
Create MaxCompute foreign tables in Hologres database.
10. list_hg_schemas
Lists all schemas in the current Hologres database, excluding system schemas.
11. list_hg_tables_in_a_schema
Lists all tables in a specific schema, including their types (table, view, external table, partitioned table).
12. show_hg_table_ddl
Show the DDL script of a table, view, or external table in the Hologres database.

