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        • ALTER TABLE PARTITION - GaussDB

          ALTER TABLE PARTITION - GaussDB

          If the UPDATE GLOBAL INDEX clause is not used when you delete, split, merge, clear, or exchange partitions, concurrent DML services may report errors due to invalidated indexes.

          Help > GaussDB > Developer Guide(Centralized_V2.0-3.x) > SQL Reference > SQL Syntax
        • Specifying a Position for Logical Decoding - GaussDB

          Specifying a Position for Logical Decoding - GaussDB

          05-11 11:21:27.243517+08) CSN 15650 0/243EF758 | 98708 | BEGIN 98708 0/243EFA78 | 98708 | COMMIT 98708 (at 2024-05-11 11:22:21.08472+08) CSN 15651 0/243FFD98 | 98710 | BEGIN 98710 0/244000D0 | 98710 | COMMIT 98710 (at 2024-05-11 11:23:21.085542+08) CSN 15653 --More-- Delete

          Help > GaussDB > Feature Guide(Centralized_V2.0-8.x) > Logical Replication > Logical Decoding
        • Running SQL Statements - GaussDB

          Running SQL Statements - GaussDB

          Operations such as SELECT, UPDATE, INSERT, and DELETE can be performed on XML data. The prerequisite is that you have connected to the database using the connection object conn.

          Help > GaussDB > Developer Guide(Centralized_V2.0-3.x) > Application Development Guide > Development Based on JDBC > Development Procedure
        • EXPLAIN - GaussDB

          EXPLAIN - GaussDB

          If you want to use EXPLAIN ANALYZE on an INSERT, UPDATE, DELETE, CREATE TABLE AS, or EXECUTE statement without letting the statement affect your data, use this approach: 1 2 3 START TRANSACTION; EXPLAIN ANALYZE ...; ROLLBACK; Syntax Display the execution plan of an SQL statement,

          Help > GaussDB > Developer Guide(Distributed_V2.0-8.x) > SQL Reference > SQL Syntax > E
        • Running SQL Statements - GaussDB

          Running SQL Statements - GaussDB

          Operations such as SELECT, UPDATE, INSERT, and DELETE can be performed on XML data. The prerequisite is that you have connected to the database using the connection object conn.

          Help > GaussDB > Developer Guide(Centralized_V2.0-8.x) > Application Development Guide > Development Based on JDBC > Development Procedure
        • ALTER INDEX - GaussDB

          ALTER INDEX - GaussDB

          Otherwise, the performance of DML operations such as INSERT, UPDATE, and DELETE may be affected.

          Help > GaussDB > Developer Guide(Distributed_V2.0-8.x) > SQL Reference > SQL Syntax > A
        • Restrictions - GaussDB

          Restrictions - GaussDB

          begin; BEGIN gaussdb=# call proc_sys_ref(null); c1 -------------------- <unnamed portal 1> (1 row) gaussdb=# fetch "<unnamed portal 1>"; ERROR: cursor "<unnamed portal 1>" does not exist gaussdb=# end; ROLLBACK gaussdb=# DROP PROCEDURE proc_sys_ref; DROP PROCEDURE -- Delete

          Help > GaussDB > Developer Guide(Distributed_V2.0-8.x) > Autonomous Transaction
        • CREATE PROCEDURE - GaussDB

          CREATE PROCEDURE - GaussDB

          If a function is defined as IMMUTABLE or SHIPPABLE, avoid INSERT, UPDATE, DELETE, MERGE, and DDL operations in the function because the CN needs to determine the execution node for these operations. Otherwise, an error may occur.

          Help > GaussDB > Developer Guide(Distributed_V2.0-8.x) > SQL Reference > SQL Syntax > C
        • Developer Guide(Centralized_V2.0-2.x) - GaussDB

          Developer Guide(Centralized_V2.0-2.x) - GaussDB

          Return type: bigint pg_stat_get_last_data_changed_time(oid) Description: Returns the time when INSERT, UPDATE, DELETE, or EXCHANGE/TRUNCATE/DROP PARTITION was last performed on a table.

          Help > GaussDB > Developer Guide(Centralized_V2.0-2.x)
        • Statistics Information Functions - GaussDB

          Statistics Information Functions - GaussDB

          Return type: bigint pg_stat_get_last_data_changed_time(oid) Description: Returns the time when INSERT, UPDATE, DELETE, or EXCHANGE/TRUNCATE/DROP PARTITION was last performed on a table.

          Help > GaussDB > Developer Guide(Centralized_V2.0-2.x) > SQL Reference > Functions and Operators
        • Other Optimizer Options - GaussDB

          Other Optimizer Options - GaussDB

          Only simple DELETE statements are supported. For example: DELETE FROM t1 WHERE c1 = ? and c2 = 10; Columns c1 and c2 are index columns, which can be followed by constants or parameters. Only simple UPDATE statements are supported. For example: UPDATE t1 SET c3 = c3+?

          Help > GaussDB > Developer Guide(Centralized_V2.0-2.x) > Configuring GUC Parameters > GUC Parameters > Query Planning
        • Data Damage Detection and Repair Functions - GaussDB

          Data Damage Detection and Repair Functions - GaussDB

          To repair the file, you need to delete the file whose size is 0 and then repair it. You can delete a file only after the file descriptor is automatically closed. You can manually restart the process or perform a primary/standby switchover.

          Help > GaussDB > Developer Guide(Centralized_V2.0-3.x) > SQL Reference > Functions and Operators
        • CREATE FUNCTION - GaussDB

          CREATE FUNCTION - GaussDB

          If a function is defined as IMMUTABLE or SHIPPABLE, avoid INSERT, UPDATE, DELETE, MERGE, and DDL operations in the function because the CN needs to determine the execution node for these operations. Otherwise, an error may occur.

          Help > GaussDB > Developer Guide(Distributed_V2.0-8.x) > SQL Reference > SQL Syntax > C
        • PG_THREAD_WAIT_STATUS - GaussDB

          PG_THREAD_WAIT_STATUS - GaussDB

          CsnMinLock Used to control the concurrent access and storage of CSN MIN HypoIndexLock Used to create, delete and reset the virtual index by the lightweight lock. XGBoostLibLock Used by DB4AI to call the XGBoost library.

          Help > GaussDB > Developer Guide(Distributed_V2.0-8.x) > System Catalogs and System Views > System Views > Other System Views
        • Configurable DB Instance Parameters - GaussDB

          Configurable DB Instance Parameters - GaussDB

          If this parameter is set to delete, dependent objects will be automatically deleted when a DROP CASCADE operation is performed on a function or package.

          Help > GaussDB > User Guide > Parameter Management
        • Developer Guide(Centralized_V2.0-2.x) - GaussDB

          Developer Guide(Centralized_V2.0-2.x) - GaussDB

          The desired access permission is specified by a text string, which must be SELECT, INSERT, UPDATE, DELETE, TRUNCATE, REFERENCES, TRIGGER, ALTER, DROP, COMMENT, INDEX or VACUUM.

          Help > GaussDB > Developer Guide(Centralized_V2.0-2.x)
        • System Information Functions - GaussDB

          System Information Functions - GaussDB

          The desired access permission is specified by a text string, which must be SELECT, INSERT, UPDATE, DELETE, TRUNCATE, REFERENCES, TRIGGER, ALTER, DROP, COMMENT, INDEX or VACUUM.

          Help > GaussDB > Developer Guide(Centralized_V2.0-3.x) > SQL Reference > Functions and Operators
        • Plan Hint Optimization - GaussDB

          Plan Hint Optimization - GaussDB

          Description Plan hints are specified in the following format after keywords such as SELECT, INSERT, UPDATE, DELETE, and MERGE: 1 /*+ <plan hint>*/ You can specify multiple hints for a query plan and separate them by spaces.

          Help > GaussDB > Developer Guide(Centralized_V2.0-2.x) > SQL Optimization > Hint-based Tuning
        • Cluster Transaction Parameters - GaussDB

          Cluster Transaction Parameters - GaussDB

          The multinode hint can be added after the select, insert, update, delete, and merge keywords. gtm_host2 Parameter description: Specifies the host name or IP address of the standby GTM 2 if the standby GTM 2 is deployed. This parameter is visible only to the sysadmin user.

          Help > GaussDB > Developer Guide(Distributed_V2.0-2.x) > Configuring GUC Parameters > GUC Parameters
        • Table Design Specifications - GaussDB

          Table Design Specifications - GaussDB

          [Rule] Once a distribution key is inserted, it cannot be updated unless you delete the key and insert it again.

          Help > GaussDB > Developer Guide(Distributed_V2.0-2.x) > Development and Design Proposal > Database Design Specifications
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