Many! If the code would simply crash, I’d know I screw it up. Data Scientists need to spend a considerable amount of time on data validation because an SQL query always returns something. 1. Not knowing in what order queries execute SQL has a low barrier to entry. You start writing q...
安装的presto是0.95版本;使用的presto-jdbc是0.202的,这里使用jdbc去访问时候,connection可以链接成功,但是在执行excuteQuery时候抛出java.sql.SQLException: Error executing query异常,如下全部: java.sql.SQLException: Error executing query at com.facebook.presto.jdbc.PrestoStatement.internalExecute(PrestoStatement.java...
slow_query_log=1slow_query_log_file= slow.loglog_slow_extra=1log_slow_verbosity= FULLlong_query_time=0.01log_queries_not_using_indexes=1log_throttle_queries_not_using_indexes=60min_examined_row_limit=100log_slow_admin_statements=1log_slow_slave_statements=1 各个选项分别简介如下: 一条经典的慢...
Executing the query "EXECUTE master.dbo.xp_create_subdir N'C:\backups\D..." failed with the following error: "xp_create_subdir() returned error 5, 'Access is denied.'". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctl...
SqlQueryRawallows for dynamic construction of SQL queries, just likeFromSqlRawdoes for entity types. Executing non-querying SQL In some scenarios, it may be necessary to execute SQL which does not return any data, typically for modifying data in the database or calling a stored procedure which...
WHERE od.SalesOrderID = o.SalesOrderID GROUP BY OrderDate, ProductID; GO -- Create an index on the view CREATE UNIQUE CLUSTERED INDEX IDX_V1 ON Sales.vOrders (OrderDate, ProductID); GO -- This query can use the indexed view even though the view is -- not specified in the FROM ...
When you use SSMS to run a SQL query that returns a very large amount of data, you receive an error message that resembles the following: An error occurred while executing batch. Error message is: Exception of type 'System.OutOfMemoryException' was thrown Cause This issue occurs because SSMS...
=null){name=null;type=SqlCommandType.FLUSH;}else{thrownewBindingException("Invalid bound statement (not found): "+mapperInterface.getName()+"."+methodName);}}else{//获取sql的类型name=ms.getId();type=ms.getSqlCommandType();if(type==SqlCommandType.UNKNOWN){thrownewBindingException("Unknown ...
56 sec HDFS Read: 759707516556 HDFS Write: 0 FAIL INFO : Total MapReduce CPU Time Spent: 0 days 1 hours 54 minutes 35 seconds 560 msec INFO : Completed executing command(queryId=hive_20190926142424_db92fdf7-f685-403d-b3fa-65e92851bfb9); Time taken: 1002.856 seconds SQL查询异常:...
I deleted the data from the main table and loaded back from the temporary table, now the same select query giving results from main table also. I didn't understand the problem, looking like not a data problem and not a table problem. It may be because of ...