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The basic process is as follows: Prerequisites Step 1: Migrating Metadata Step 2: Migrating Table Data Step 3: Verifying Data Consistency Figure 1 ADB migration Notes and Constraints If DELETE or UPDATE operations occur during CDM migration, data consistency cannot be guaranteed afterward
The preset data masking administrator has the authority to create, modify, and delete data masking policies. Audit logs can record objects that are deleted in cascading mode. Audit logs can be dumped to OBS.
exmp_tb2" ("tb2_id","tb2_price","tb2_note","tb2_date") VALUES (13,DEFAULT,DEFAULT,DEFAULT); VALUES MySQL REPLACE supports a statement to insert or delete multiple values, separated by commas. Input 1 2 3 4 5 # If data is available, replacement will be performed.
If this parameter is set, it is enabled. null Table 4 connector parameters Parameter Description Default Value ignoreDelete Whether to ignore delete in Flink tasks. false (The default value is true before 1.0.10.) ignoreNullWhenUpdate Whether to ignore the update of columns with null
CheckDDL Start a transaction to delete schemas and tables. If the transaction can be committed, the inspection passes. Otherwise, the inspection fails. CheckTimeZone The inspection passes if all nodes in the cluster use the same time zone, and fails if they do not.
This parameter is not available to temporary tables with the ON COMMIT [DELETE ROWS|DROP] option. If you need the statistics, manually perform the analyze operation.
For example, ddl_sequence indicates that the audit type is sequence-related operations. dml_action_insert/dml_action_delete/dml_action_update/dml_action_merge/dml_action_select Indicates that the audit type is DML operations such as INSERT, DELETE, UPDATE, and MERGE. internal_event
You can only add data to the database, not delete it. All fields in the added data must match. 2. If RETRY_MAX_TIMES is 1 and no client retries occur, data streams directly to the GaussDB(DWS) database, saving client memory by avoiding batch processing.
Such access is cross-cluster. junk tuple A tuple that is deleted using the DELETE and UPDATE statements. When deleting a tuple, GaussDB(DWS) only marks the tuples that are to be cleared.
Format: no_merge (current query) and no_merge(relid) (specified object). 3 DML hints Added support for hints in INSERT, UPDATE, MERGE, and DELETE statements. 4 AGG redistribution hints support specified column names. Column names can be specified for AGG redistribution hints.
You can query the following parameters to view related information: Use the disk_cache_base_paths parameter to view, add, or delete cache disk paths. Use the disk_cache_max_size parameter to view and adjust the disk cache size.
sequence Waiting for GTM to create a sequence. gtm alter sequence Waiting for GTM to modify a sequence. gtm get sequence val Waiting for obtaining the next value of a sequence from GTM. gtm set sequence val Waiting for GTM to set a sequence value. gtm drop sequence Waiting for GTM to delete
You can also add, delete, or modify security group rules in the current security group. For details, see Modifying a Security Group. Changing the security group of a cluster may cause brief service disruption. Exercise caution when performing this operation.
Deleted Database Interfaces To facilitate the ongoing development and maintenance of GaussDB(DWS), a metadata sunset feature is implemented to phase out outdated GUC parameters, system functions, and system views. For the sake of preserving historical compatibility, deprecated functions
Default value: 30 Before setting this GUC parameter to enable the data retention function, delete data from the gs_wlm_session_info and gs_wlm_operator_info tables. The default value of this parameter is 30 for a new cluster.
To delete the subplan, modify the statement as follows: 1 2 3 4 5 6 7 8 9 10 11 12 13 explain(costs off) select * from master_table as t1 where exists (select t2.a from sub_table as t2 where t1.a = t2.b and t1.a = t2.a); QUERY PLAN --------------
If a line is concurrently delete, no errors are reported after waiting. 3). If a line is concurrently updated and deleted, an error is reported after waiting.
It performs the same function as a DELETE statement without a WHERE clause. After truncating, the table will exist but it will be empty. DSC supports migration of TRUNCATE TABLE statements with static table names only.
statements by setting maxOpenPreparedStatements to a value less than the maximum number of cursors. accessToUnderlyingConnectionAllowed false This controls whether the PoolGuard can access underlying connections. removeAbandonedOnMaintenance removeAbandonedOnBorrow false Whether to delete
If the previous SQL statement is a DELETE, INSERT, or UPDATE statement, ROW_COUNT identifies the number of rows that qualified for the operation. System Tables System tables _V_SYS_COLUMNS is replaced with information_schema.columns.
