Here is the code, if you’d like to try it in your local database (it should work withPostgreSQL9.3): 代码语言:javascript 代码运行次数:0 运行 AI代码解释 DROPTABLEIFEXISTSsales_table;CREATETEMPORARYTABLEsales_table(keyvarchar(6),customerIDvarchar(10),productIDvarchar(10),price float);INSERTIN...
并行查询功能更新:支持全表扫描/全索引扫描/索引范围扫描并行查询,支持方差和标准差函数,支持在 LIMIT 语法下设置并行策略,支持 Prepared Statement(PS)查询模式。 支持自动 kill 空闲事务。 支持动态线程池。 支持NOWAIT 语法。 支持闪回查询。 支持计划缓存点查优化。
ERROR c.a.druid.pool.DruidPooledStatement - clearResultSet errororg.apache.hive.service.cli.HiveSQLException:Invalid query handle: d84d9133d8a6ce9c:9a77cd100000000atorg.apache.hive.jdbc.Utils.verifySuccess(Utils.java:266)atorg.apache.hive.jdbc.Utils.verifySuccessWithInfo(Utils.java:252)atorg.ap...
IS 锁只能在分配给事务的分区中获取。 对于此示例,假定 IS 锁是在 ID 为 6 的分区中获取。 SQL 复制 -- Start a transaction. BEGIN TRANSACTION; -- This SELECT statement will acquire an IS lock on the table. SELECT col1 FROM TestTable WITH (HOLDLOCK); 会话2: 在一个事务中执行...
is_nullable FROM sys.columns WHERE object_id = OBJECT_ID(N'Sales.Orders'); 2.8.2 信息结构视图 信息架构视图是一个视图集合,位于名为INFORMATION_SCHEMA的架构中,并以标准方式提供元数据信息。 SELECT TABLE_SCHEMA, TABLE_NAME FROM INFORMATION_SCHEMA.TABLES ...
history_table_name [, DATA_CONSISTENCY_CHECK = { ON | OFF } ] ) ] } Arguments database_name The name of the database in which the table is created. database_name must specify the name of an existing database. If not specified, database_name defaults to the current database. The...
Msg 13577, Level 16, State 1, Line 25 ALTER TABLE SWITCH statement failed on table 'MyDB.dbo.Staging_Department_2015_09_26' because target table has SYSTEM_TIME PERIOD while source table does not have it. 更新数据 使用常规的UPDATE语句更新当前表中的数据。 可...
After aDELETEstatement is executed, the table can still contain empty pages. For example, empty pages in a heap can't be deallocated without at least an exclusive (LCK_M_X) table lock. If the delete operation doesn't use a table lock, the table (heap) might contain many empty pages....
The CALCULATETABLE expression in the previous example can be any table expression. Usually you need to test the result of a particular filter and you use this test in the logical expression in an IF statement. In reality, when a table is empty, the COUNTROWS function returns BLANK. Such a ...
checkArgument(Preconditions.java:138) ~[plugin_ne-flink-1.12.4-1.1.4_scala2.12_hive2.1.1-release-3.8.3-1.3.1.jar:?] at org.apache.flink.connector.jdbc.statement.FieldNamedPreparedStatementImpl.prepareStatement(FieldNamedPreparedStatementImpl.java:197) ~[plugin_ne-flink-1.12.4-1.1.4_scala2.12...