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        • Using Go Driver to Operate an Encrypted Database - GaussDB

          Using Go Driver to Operate an Encrypted Database - GaussDB

          = nil { log.Fatal(err) } else { fmt.Printf("var1:%v, var2:%v, var3:%v\n", var1, var2, var3) } } Preparing the Encrypted Table // Call the Prepare method of the database instance to create a prepared object. delete_stmt, err := db.Prepare("delete from creditcard_info

          Help > GaussDB > Feature Guide(Centralized_V2.0-8.x) > Setting Encrypted Equality Query
        • CREATE MASKING POLICY - GaussDB

          CREATE MASKING POLICY - GaussDB

          The result is random and different each time. gaussdb=# SELECT col8 FROM tb_for_masking; col8 -------------------- cf32a9aa427f219ab0 (1 row) gaussdb=# SELECT col8 FROM tb_for_masking; col8 -------------------- 13efa056dda1e1a474 (1 row) Delete data

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

          CREATE TYPE - GaussDB

          the compfoo1 type. openGauss=# DROP TYPE usr1.compfoo1 cascade; Delete related tables and users. openGauss=# DROP TABLE t1_compfoo; openGauss=# DROP TABLE t2_compfoo; openGauss=# DROP SCHEMA usr1; openGauss=# DROP USER usr1; -- Create an enumerated type. openGauss=# CREATE TYPE

          Help > GaussDB > Developer Guide(Distributed_V2.0-2.x)
        • 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_V2.0-3.x) > SQL Reference > SQL Syntax
        • Developer Guide(Centralized_V2.0-2.x) - GaussDB

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

          Function 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)
        • 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_V2.0-2.x) > Application Development Guide > Development Based on JDBC > Development Process
        • Logical Decoding Options - GaussDB

          Logical Decoding Options - GaussDB

          The next 1-byte letter can be B, C, I, U, or D, representing BEGIN, COMMIT, INSERT, UPDATE, or DELETE, respectively. If B is used in Step 3: The next eight bytes (uint64) indicate the CSN. The next eight bytes (uint64) indicate first_lsn.

          Help > GaussDB > Feature Guide(Distributed_V2.0-8.x) > Logical Replication > Logical Decoding
        • Numeric Types - GaussDB

          Numeric Types - GaussDB

          VALUES(100, 10, 1000, 10000, 200, 2000); -- View data. b_database=# SELECT * FROM int_type_t2; a | b | c | d | e | f -----+----+------+--------+-----+------ 100 | 10 | 1000 | 10000 | 200 | 2000 (1 row) -- Drop the table. b_database=# DROP TABLE int_type_t2; -- Delete

          Help > GaussDB > Developer Guide(Distributed_V2.0-8.x) > SQL Reference > Data Types
        • Other Functions - GaussDB

          Other Functions - GaussDB

          The DML statements include the UPDATE, INSERT, DELETE, MERGE, PREPARE, EXPLAIN, SHOW, LOCK, COPY, CLUSTER, ANONYMOUS, DELTA, EXECUTE, MOVE, FETCH, CLOSE, DEALLOCATE, DECLARE, and LOAD statements.

          Help > GaussDB > Developer Guide(Distributed_V2.0-8.x) > SQL Reference > Functions and Operators > System Administration Functions
        • 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 the following approach: START TRANSACTION; EXPLAIN ANALYZE ...; ROLLBACK; The DETAIL, NODES, and NUM_NODES parameters cannot be

          Help > GaussDB > Developer Guide(Centralized_V2.0-2.x) > SQL Reference > SQL Syntax
        • ALTER INDEX - GaussDB

          ALTER INDEX - GaussDB

          Otherwise, the performance of DML operations such as INSERT, UPDATE, and DELETE may be affected. Syntax Rename a table index. ALTER INDEX [ IF EXISTS ] index_name RENAME TO new_name; Change the tablespace to which a table index belongs.

          Help > GaussDB > Developer Guide(Centralized_V2.0-8.x) > SQL Reference > SQL Syntax > A
        • HTAP System Functions - GaussDB

          HTAP System Functions - GaussDB

          If the third digit is 1, a delete operation is recorded. If the second digit is 1, an insert operation is recorded. Example: When enable_htap is set to off: gaussdb=# select * from gs_htap_tmu_data(16796,0); ERROR: Query failed due to ENABLE_HTAP is not enabled.

          Help > GaussDB > Developer Guide(Centralized_V2.0-8.x) > SQL Reference > Functions and Operators > System Administration Functions
        • 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_V2.0-3.x) > System Catalogs and System Views > System Views
        • Logical Decoding Options - GaussDB

          Logical Decoding Options - GaussDB

          This parameter is invalid for UPDATE and DELETE on old tuples, and the corresponding tuples always output the stored generated columns. Value range: Boolean.

          Help > GaussDB > Feature Guide(Centralized_V2.0-8.x) > Logical Replication > Logical Decoding
        • Numeric Types - GaussDB

          Numeric Types - GaussDB

          VALUES(100, 10, 1000, 10000, 200, 2000); -- View data. b_database=# SELECT * FROM int_type_t2; a | b | c | d | e | f -----+----+------+--------+-----+------ 100 | 10 | 1000 | 10000 | 200 | 2000 (1 row) -- Drop the table. b_database=# DROP TABLE int_type_t2; -- Delete

          Help > GaussDB > Developer Guide(Centralized_V2.0-8.x) > SQL Reference > Data Types
        • ALTER TABLE SUBPARTITION - GaussDB

          ALTER TABLE SUBPARTITION - GaussDB

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

          Help > GaussDB > Developer Guide(Centralized_V2.0-8.x) > SQL Reference > SQL Syntax > A
        • Connection Settings - GaussDB

          Connection Settings - GaussDB

          If this parameter is not supported, delete it from the configuration file first before proceeding with the upgrade. Parent topic: Connection and Authentication

          Help > GaussDB > Developer Guide(Centralized_V2.0-2.x) > Configuring GUC Parameters > GUC Parameters > Connection and Authentication
        • 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
        • HLL Types - GaussDB

          HLL Types - GaussDB

          The insertion fails because parameter types are inconsistent. gaussdb=# insert into t1(id, set) values (1, hll_empty(14,5)); ERROR: log2explicit does not match: source is 5 and dest is 10 -- Delete the table. gaussdb=# drop table t1; The following describes HLL application scenarios

          Help > GaussDB > Developer Guide(Distributed_V2.0-3.x) > SQL Reference > Data Type
        • 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(Distributed_V2.0-3.x) > SQL Reference > SQL Syntax
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