Cluster a table according to an index. CLUSTERinstructsGaussDB(DWS)to cluster the table specified bytable_namebased on the index specified byindex_name. The index specified byindex_namemust have been defined in
一个 Elasticsearch 的 index 分布于一个或多个 shard 之中,而每个 shard 相应于一个 Aache Lucene 的 index。每个 Index 一个或许多的 documents 组成,并且这些 document 可以分布于不同的 shard 之中。 这是如何运作的? Elasticsearch 将索引分成单独的块,称为分片。 此操作在索引级别进行,因为我们在每个索引...
The [mysqld] and [api] sections in the config.ini file define the behavior of the MySQL servers (SQL nodes) and other applications (API nodes) used to access cluster data. None of the parameters shown is required. If no computer or host name is provided, any host can use this SQL or...
To change index order, you may need to drop and re-create index. In the Management Studio, switch to clustered index node, right-click and select Script Index as -> DROP and CREATE To -> New Query Edition Windows; change index column sort order from ASC to DESC. Belows is a sample ...
The MySQL servers involved in replication should in this case be restarted. After this, you should use the RESET MASTER and RESET REPLICA (prior to NDB 8.0.22, use RESET SLAVE) statements to clear the invalid ndb_binlog_index and ndb_apply_status tables, respectively. ...
A new Index Statistics function enables the SQL optimizer to build a better execution plan for each query. In the past, altering a non-optimal query plans required the manual enforcement of indexes via USE INDEX or FORCE INDEX. To get maximum benefit from AQL, it is strongly recommended to ...
getKeysFreeResult(keyindex); if (error_code) *error_code = CLUSTER_REDIR_DOWN_UNBOUND; return NULL; } /* If we are migrating or importing this slot, we need to check * if we have all the keys in the request (the only way we ...
modify the configuration file for the Integration Services service on each node in the cluster. You modify each of these configuration files to point to all available instances of SQL Server on which packages are stored. This solution provides the high availability that most customers need,...
Oracle Database stores together rows having the same cluster key value. Each distinct cluster key value is stored only once in each data block, regardless of the number of tables and rows in which it occurs. If you specify neitherINDEXnorHASHKEYS, then Oracle Database creates an indexed clust...
You can use any standard SQL client application to connect to the DB cluster. In this example, you connect to the Aurora MySQL DB cluster using the mysql command line client. To connect to the Aurora MySQL DB cluster Find the endpoint (DNS name) and port number of the writer instanc...