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DSC will delete the keyword during migration.
Deleting Data For details about how to delete data that meets specified conditions from a table, see DELETE. Copying Data GaussDB(DWS) provides a statement for copying data between tables and files. For details, see COPY.
PG_REWRITE columns Column Type Description rulename Name Name of the rule ev_class OID Name of the table that uses the rule ev_attr Smallint Column this rule is for (always 0 to indicate the entire table) ev_type Char Event type for this rule: 1 = SELECT 2 = UPDATE 3 = INSERT 4 = DELETE
Examples Delete the manager role: 1 DROP ROLE manager; Helpful Links CREATE ROLE, ALTER ROLE, SET ROLE Parent Topic: DDL Syntax
automatically) last_autoanalyze Timestamp with time zone Time when the last ANALYZE operation is performed automatically autoanalyze_count Bigint Number of times of automatically performing the ANALYZE operation last_change Bigint Time when the last modification (INSERT, UPDATE, or DELETE
created in the future. pubinsert Boolean - If its value is true, the INSERT operation is copied for the tables in the publication. pubupdate Boolean - If its value is true, the UPDATE operation is copied for the tables in the publication. pubdelete Boolean - If its value is true, the DELETE
To create or delete a schema, you must have the CREATE permission for its database. To access table1 in a schema, a user must be granted the CONNECT permission for its database, the USAGE permission of the schema, and the SELECT permission of table1.
Deleting a common table Click Delete to delete a common table. Operating columns Click the corresponding operation button to add, edit, and delete columns. You can edit the column name, data type, length, and specify whether it is a non-NULL column.
Table 1 Parameters in the features-teradata.properties file Parameter Description Value Range Default Value Example deleteToTruncate Rule for migrating DELETE statements without a WHERE clause. true: enables the migration of DELETE to TRUNCATE. false: disables the migration of DELETE
Periodically delete data based on the partition key. List partitioning Partitioning is performed based on a unique list of partition key values. A specific number of enumerated values are used as partition key values. Most queries contain partition keys as filter criteria.
Delete '\0' from the string before importing it. Handling Procedure Run the sed command to replace "0x00". 1 sed -i 's/\x00//g;' file Parameter: -i indicates replacement in the original file. s/ indicates single replacement. /g indicates global replacement.
Therefore, VACUUM FULL table_name has nothing to delete, causing the table size to remain unchanged. Concurrent transactions exist during the execution of VACUUM FULL table_name, causing the recently deleted data to be skipped. As a result, the table size does not change.
DSC will delete the keyword during migration.
DSC will delete the attribute during migration. Input 1 2 3 4 5 6 7 8 CREATE TABLE `public`.
Any SELECT INSERT, UPDATE, DELETE, or VALUES statement.
The value is the sum of the number of times on each CN. last_change Bigint Time when the last modification (INSERT, UPDATE, or DELETE) is performed Parent Topic: System Views
For scenarios where data is frequently deleted, the following solutions can be used: Use TRUNCATE instead of DELETE and use temporary tables. Regularly perform DELETE operation on data generated in a specified period.
If there are a large number of UPDATE and DELETE operations, select the User tables. If there are a large number of CREATE and DELETE operations, select System catalogs. Click Next: Configure Schedule to configure the schedule and Vacuum type.
If the physical space usage does not decrease after you run the VACUUM FULL command, check whether there were other active transactions (started before you delete data transactions and not ended before you run VACUUM FULL).
VACUUM FULL table_name; If the physical space usage does not decrease after you run the VACUUM FULL command, check whether there were other active transactions (started before you delete data transactions and not ended before you run VACUUM FULL).
