4orig_table => 'unpar_table', 5int_table => 'par_table'); 6END; 7/ PL/SQL 过程已成功完成。 结束重定义的意义: 基表unpar_table 和临时分区表par_table 进行了交换。此时临时分区表par_table成了普通表,我们的基表unpar_table成了分区表。 我们在重定义的时候,基表
3) Alter table exchange partition partition_name with table exchange table Note that during the exchange all rows of the exchange table must qualify for the partition to be exchanged, otherwise the following error is thrown ORA-14099: all rows in table do not qualify for specified partition. Th...
4 orig_table => 'unpar_table', 5 int_table => 'par_table'); 6 END; 7 / PL/SQL 过程已成功完成。 结束重定义的意义: 基表unpar_table 和临时分区表par_table 进行了交换。 此时临时分区表par_table成了普通表,我们的基表unpar_table成了分区表。 我们在重定义的时候,基表unpar_table是可以进...
ALTER TABLE EXCHANGE PARTITION can be used to convert a partition (or subpartition) into a non-partitioned table and a non-partitioned table into a partition (or subpartition) of a partitioned table by exchanging their data and index segments. Unless update indexes close the ALTER TABLE … EX...
The CREATE TABLE statement in Oracle databases is used to create new tables. GaussDB(DWS) also supports this statement. So it does not need to be migrated.The ALTER TABLE
(1)Tables greater than 2GB should always be considered for partitioning.(2)Tables containing historical data, in which new data is added into the newest partition. A typical example is a historical table where only the current month's data is updatable and the other 11 months are read only....
Get the partitionLowerBound property: The minimum value of column specified in partitionColumnName that will be used for proceeding range partitioning. Object partitionNames() Get the partitionNames property: Names of the physical partitions of Oracle table. Object partitionUpperBound() G...
For an example, see the Parallel copy from Oracle section. No partitionColumnName Specify the name of the source column in integer type that will be used by range partitioning for parallel copy. If not specified, the primary key of the table is auto-detected and used as the partition column...
20.14.6.1 About Partitioning External Tables Partitioning data in external tables is similar to partitioning tables stored in the database, but there are some differences. The files for the partitioned external table can be stored on a file system, in Apache Hive storage, or in a Hadoop Distrib...
However, if you are using Kafka APIs to produce to a stream, the partitioning is controlled by the Kafka client and the partitioner in the Kafka client is responsible for partitioning logic. This is called client-side partitioning. How do I generate an effective partition key?