Help Center/ GaussDB(DWS)/ FAQs/ Database Use/ How Do I Check Whether a GaussDB(DWS) Table Is Row-Stored or Column-Stored?
Updated on 2025-07-22 GMT+08:00
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How Do I Check Whether a GaussDB(DWS) Table Is Row-Stored or Column-Stored?

The storage mode of a table is controlled by the ORIENTATION parameter in the table creation statement. row indicates row storage, and column indicates column storage.

If ORIENTATION is not specified, row storage is used by default.

You can use the table definition function PG_GET_TABLEDEF to check whether the created table is row-store or column-store.

For example, orientation=column indicates a column-store table.

Currently, you cannot run the ALTER TABLE statement to modify the parameter ORIENTATION.

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SELECT * FROM PG_GET_TABLEDEF('customer_t1');
                                  pg_get_tabledef                                  
-----------------------------------------------------------------------------------
 SET search_path = tpchobs;                                                       +
 CREATE  TABLE customer_t1 (                                                      +
         c_customer_sk integer,                                                   +
         c_customer_id character(5),                                              +
         c_first_name character(6),                                               +
         c_last_name character(8)                                                 +
 )                                                                                +
 WITH (orientation=column, compression=middle, colversion=2.0, enable_delta=false)+
 DISTRIBUTE BY HASH(c_last_name)                                                  +
 TO GROUP group_version1;
(1 row)
Parent topic: Database Use