After a Flink SQL job is submitted on DLI, the job fails to be executed. The following error information is displayed in the job log: connect to DIS failed java.lang.IllegalArgumentException: Access key cannot be null Possible Causes
Caused by: com.ibm.db2.jcc.am.SqlNonTransientConnectionException: [jcc][t4][10335][10366][4.15.82] Invalid operation: Connection is closed. ERRORCODE=-4470, SQLSTATE=08003 at com.ibm.db2.jcc.am.fd.a(fd.java:686)[277:wrap_mvn_com.ibm_db2jcc4_4.15.82:0 ...
way you look at it it requires a good knowledge of both the theory and practice of index ...
alter table t add compare_str2 as c1 + ISNULL (c2, '0') persisted go create index ix2 on t (compare_str2)go--this time, the computed column is used --and cardinality estimate is accurate and the index is used set statistics profile on go select ISNULL(c1,'0') ...
8.1+ versions support what is known asBitmap Index Scan, which allows multiple indexes on a table to be used in a query by creating in-memory bitmap indexes. If you have got many indexes, don't expect all possible candidate indexes to be used. Sometimes a table scan is just more ...
Today, we got a service request that our customer has 30 databases in a server but was not able to connect of 3 of them. Following I would like to share with you my findings here. All the databases in this server 'XXX' are standalone databases and t...
Use [DBInMemoryOLTP] Go CREATE TABLE [techforum_member_list]( [TfmID] INT NOT NULL PRIMARY KEY NONCLUSTERED HASH WITH (BUCKET_COUNT = 500000), [Name] NVARCHAR(50) COLLATE Latin1_General_100_BIN2 NOT NULL INDEX [IName] HASH WITH (BUCKET_COUNT = 500000), [Jo...
原文:What is the difference between Mysql InnoDB B+ tree index and hash index? Why does MongoDB use B-tree? | by Mina Ayoub | Medium The most important difference between B-tree and B+ tree is that B+ tree only has leaf nodes to store data, and other nodes are used for indexing,...
Edge and Bing Search - zsdch encoding: Why is it being used? Seems Edge has been including zsdch in the accept-encoding header (from searching, as far back as 112). Couldn't find any documentation on this encoding type, only sdch which is considered defunct. W......
Consecutive values within a transaction– A transaction inserting multiple rows is not guaranteed to ...