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        • ALTER DATABASE - GaussDB(DWS)

          ALTER DATABASE - GaussDB(DWS)

          Change the database owner. 1 2 ALTER DATABASE database_name OWNER TO new_owner; Change the default tablespace of the database. 1 2 ALTER DATABASE database_name SET TABLESPACE new_tablespace; The current tablespaces cannot be changed to OBS tablespaces.

          Help > GaussDB(DWS) > SQL Syntax Reference (9.1.0.x) > DDL Syntax
        • ALTER EXTERNAL SCHEMA - GaussDB(DWS)

          ALTER EXTERNAL SCHEMA - GaussDB(DWS)

          An existing foreign server whose type is lf, dli, obs, or hdfs. CATALOG Catalog to be accessed in LakeFormation. - OPTIONS Specifies parameters of foreign table data. This is supported only by 8.3.0 and later versions. dli_project_id: project ID of DLI.

          Help > GaussDB(DWS) > SQL Syntax Reference (9.1.0.x) > DDL Syntax
        • Data Sharing Functions - GaussDB(DWS)

          Data Sharing Functions - GaussDB(DWS)

          Once established, the KV cache of the consumer VW periodically synchronizes the SST file incrementally from the OBS cudesc snapshot directory of the producer to the local host. This allows tables in the producer VW to be queried across VWs in the consumer VM.

          Help > GaussDB(DWS) > SQL Syntax Reference (9.1.0.x) > Functions and Operators > Storage-Compute Decoupling Functions
        • Function Overview - GaussDB(DWS)

          Function Overview - GaussDB(DWS)

          based on the export mode and data format set in the OBS foreign table.

          Help > GaussDB(DWS) > Function Overview
        • GAUSS-01711 -- GAUSS-01720 - GaussDB(DWS)

          GAUSS-01711 -- GAUSS-01720 - GaussDB(DWS)

          Solution: Check whether the settings of GDS, HDFS foreign tables, Roach, and OBS are correct. GAUSS-01719: "cache lookup failed for partitioned table %u in pg_partition" SQLSTATE: XX000 Description: The corresponding tuple cannot be found in the partition table.

          Help > GaussDB(DWS) > 8.2.0 and earlier versions > Data Warehouse Service Error Codes > GAUSS-01701 -- GAUSS-01800
        • Scan Operation Hints - GaussDB(DWS)

          Scan Operation Hints - GaussDB(DWS)

          Scan operation hints can be used for row-store tables, column-store tables, HDFS tables, HDFS foreign tables, OBS tables, and subquery tables. HDFS tables include primary tables and delta tables. The delta tables are invisible to users.

          Help > GaussDB(DWS) > Developer Guide (8.1.3.x) > GaussDB(DWS) Performance Tuning > SQL Tuning > Hint-based Tuning
        • Scan Operation Hints - GaussDB(DWS)

          Scan Operation Hints - GaussDB(DWS)

          Scan operation hints can be used for row-store tables, column-store tables, HDFS tables, HDFS foreign tables, OBS tables, and subquery tables. HDFS tables include primary tables and delta tables. The delta tables are invisible to users.

          Help > GaussDB(DWS) > Developer Guide (9.1.0.x) > GaussDB(DWS) Performance Tuning > SQL Tuning > Hint-based Tuning
        • Using a Flink Job of DLI to Synchronize MySQL Data to a GaussDB(DWS) Cluster in Real Time - GaussDB(DWS)

          Using a Flink Job of DLI to Synchronize MySQL Data to a GaussDB(DWS) Cluster in Real Time - GaussDB(DWS)

          Figure 9 Testing GaussDB(DWS) connectivity Step 5: Creating a DLI Flink Job Log in to the OBS console and create an OBS bucket to store Flink jobs. For details, see the OBS User Guide. Set key parameters as follows and retain the default values for other parameters.

          Help > GaussDB(DWS) > Best Practices > Data Migration
        • Arrears - GaussDB(DWS)

          Arrears - GaussDB(DWS)

          If data stored in the OBS is no longer used, you can delete it to avoid further expenditures. Configure the Balance Alert function on the Billing Center > Overview page.

          Help > GaussDB(DWS) > Billing
        • Discount package - GaussDB(DWS)

          Discount package - GaussDB(DWS)

          It is used when the amount of OBS data to be stored or the data volume exceeds the package capacity.

          Help > GaussDB(DWS) > Billing > Billing Modes
        • Restrictions - GaussDB(DWS)

          Restrictions - GaussDB(DWS)

          However, if you use more space than the free-of-charge storage space, the exceeded part is charged according to OBS billing rules. For details, see the OBS pricing details. The amount of free space you have is equal to the total storage capacity of your cluster.

          Help > GaussDB(DWS) > Service Overview
        • Importing Table Data from MRS Hive to a GaussDB(DWS) Cluster - GaussDB(DWS)

          Importing Table Data from MRS Hive to a GaussDB(DWS) Cluster - GaussDB(DWS)

          OBS Path: Find the product_info.txt file in the created OBS bucket and click Yes. HDFS Path: Select /user/hive/warehouse/demo.db/product_info/ and click Yes. Click OK to import the product_info table data. Create an ORC table and import data to the table.

          Help > GaussDB(DWS) > Best Practices > Import and Export
        • Learn How to Select a GaussDB(DWS) Region and AZ - GaussDB(DWS)

          Learn How to Select a GaussDB(DWS) Region and AZ - GaussDB(DWS)

          Each region has its own shared public services (ECS, EVS, OBS, VPC, EIP, and IMS). Regions are either common or dedicated. A common region provides common cloud services available to all tenants.

          Help > GaussDB(DWS) > FAQs > Product Consulting
        • GaussDB(DWS) Billing Modes - GaussDB(DWS)

          GaussDB(DWS) Billing Modes - GaussDB(DWS)

          It is ideal when the volume of OBS data storage or data transfer surpasses the purchased package.

          Help > GaussDB(DWS) > Billing > Billing Modes
        • How Do I Select a GaussDB(DWS) Region and AZ? - GaussDB(DWS)

          How Do I Select a GaussDB(DWS) Region and AZ? - GaussDB(DWS)

          Each region has its own shared public services (ECS, EVS, OBS, VPC, EIP, and IMS). Regions are either common or dedicated. A common region provides common cloud services available to all tenants.

          Help > GaussDB(DWS) > FAQs > Product Consulting
        • DDL - GaussDB(DWS)

          DDL - GaussDB(DWS)

          table does not support deferrable index. level:ERROR GS_213100048 errmsg:index %s is not valid. errhint: Cannot change table with invalid index. level:ERROR GS_213100054 errmsg:parition not support to specify TABLESPACE. errhint: Cold data partition of multi-temperature table or OBS

          Help > GaussDB(DWS) > 8.2.1 or later versions > Parser
        • New Features in 9.1.0.x - GaussDB(DWS)

          New Features in 9.1.0.x - GaussDB(DWS)

          By default, the OBS path of a storage-compute decoupled table is displayed as a relative path. To use the disk cache, enable the asynchronous I/O parameter.

          Help > GaussDB(DWS) > Product Bulletin > Product Notice
        • Creating a DR Task - GaussDB(DWS)

          Creating a DR Task - GaussDB(DWS)

          Currency Unit Minute (m) Hour (H) Day (d) primary_cluster_id Yes String ID of the primary cluster standby_cluster_id Yes String ID of the standby cluster primary_obs_bucket No String OBS bucket of the primary cluster standby_obs_bucket No String OBS bucket of the standby cluster Response

          Help > GaussDB(DWS) > API Reference > API Description > DR Management
        • SQL Self-Diagnosis - GaussDB(DWS)

          SQL Self-Diagnosis - GaussDB(DWS)

          Because the ANALYZE performance of the OBS foreign table and HDFS foreign table is poor, you are not advised to perform ANALYZE on these tables.

          Help > GaussDB(DWS) > Performance Tuning > SQL Optimization Guide > Typical SQL Optimization Methods
        • Common Performance Parameter Optimization Design - GaussDB(DWS)

          Common Performance Parameter Optimization Design - GaussDB(DWS)

          Use cstore_buffers to specify the cache of ORC, Parquet, or CarbonData metadata and data for OBS or HDFS foreign tables. The metadata cache size should be 1/4 of cstore_buffers and not exceed 2 GB.

          Help > GaussDB(DWS) > Performance Tuning
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