invalid partition table

In the previous section we described how to create and use a partitioned table, with an example of placing data from different years in different physical partitions. The specific partitioning method is:1th Small table: Data prior to 2010-1-1 (not including 2010-1-1).2nd Small table: Data from 2010-1-1 (including 2010-1-1) to 2010-12-31.3rd Small

Hive creates a partition table based on the current day (""). hql is as follows: CREATE EXTERNAL TABLE IF NOT EXISTS product_sell(category_id BIGINT,province_id BIGINT,product_id BIGINT,price DOUBLE,sell_num BIGINT)PARTITIONED BY (ds string)ROW FORMAT DELIMITEDFIELDS TERMINATED BY '\t'LINES TERMINATED BY '\n'STORED AS TEXTFILE; Insert data based on the date as

MANAGER7839 1981/4/2 2975.00 - 20180515 7654MARTIN salesman7698 1981/9/ - 1250.00 1400.00 - 20180515 7698BLAKE MANAGER7839 1981/5/1 2850.00 - 20180515 7782CLARK MANAGER7839 1981/6/9 2450.00 Ten 20180515 7788SCOTT ANALYST7566 1987/4/ + 3000.00 - 20180515 7839KING President1981/ One/ - 5000.00 Ten 20180515 7844TURNER salesman7698 1981/9/8 1500.00 0.00 - 20180515 7876ADAMS Clerk

without validation will be ignored.Similarly, if you do not specify update indexes, the GLOBAL index will become invalid and need to be re-compiled. 5. merge partitions (merge partitions)Alter table xxx merge partitions/subpartitions p1, p2 into partiton/subpartition p3 [TABLESPACE tablespace_name];HASH is not applicable because it has COALESCE.Table partitions must be adjacent.Like COALESCE, IO is generat

also be deleted. your intention is to delete the specified partition but keep the data. You should use merge partition, if you execute this statement, the glocal index becomes invalid and you need to re-create the global index.2.3 merge partitions Adjacent partitions can be merge as a partition. The lower boundary of

Table partitioning is only recently known Oh, I used to do is the table to achieve the billion level of data, I would like to give you a description of the MySQL table partition to create and use it, I hope to be helpful to you classmates. Table partitioning test usage, main

Summary: In a large number of businesses DataYou can consider Using Partitioned Tables to improve the performance and convenience of the application system. DataManagement, this article describes in detail the use of partition tables. For large enterprise applications or enterprise-levelDatabaseIn the application,DataThe data volume can usually reach dozens to hundreds of GB, and some can even reach TB level. Although the storage media andDataThe pro

, synchronize data on both sides exec dbms_redefinition.sync_interim_table (' Ycheng ', ' Tab_taobao_bill ', ' P_tab_taobao_bill ') ; --Administrator privileges Execute SQL command line execution 1.8. End online redefinition--Administrator privileges Execute SQL command line execution, end redefine exec dbms_redefinition.finish_redef_table ( ' Ycheng ', ' Tab_taobao_bill ', ' P_tab_taobao_bill '); --Administrator privileges Execute SQL command line execution 1.9. Verify data Select COUNT (1

Why divide tables and partitions?We often encounter large tables in daily development, so-called large tables are those that store millions or even tens records. Such tables are too large to cause the database to take too long to query and insert, with poor performance and worse performance if it involves federated queries. The purpose of partition table and table