適用於:Databricks SQL Databricks Runtime傳回查詢輸出的元數據。語法複製 { DESC | DESCRIBE } [ QUERY ] input_statement 參數查詢 這個子句是選擇性的,可以省略。 query 要描述的查詢。範例SQL 複製 -- Create table `person` > CREATE TABLE person (name STRING , age INT COMMENT 'Age column', ...
SQLTruncatedThreshold integer SQL 语句截断阈值,取值为字符串的字符数。 5120 RequestId string 请求ID。 B4CAF581-2AC7-41AD-8940-D56DF7AADF5B TotalCount integer 总记录数。 100 PageNumber integer 当前页码。 1 示例 正常返回示例 JSON格式 { "Items": [ { "QueryID": "20220426124654010000000129031519989...
QueryCondition string 是 查询过滤条件,取值如下: {"Type":"maxCost","Value":"10"}:等待时间最长的 10 个查询。 {"Type":"status","Value":"LockWaiting"}:锁等待的查询。 {"Type":"status","Value":"ResourceWaiting"}:资源等待的查询。 {"Type":"maxCost","Value":"10"} Keyword string 否 查...
"view_query_output_columns": [""], "comment": "<comment>", "table_properties": { "property1": "<property1>", "property2": "<property2>" }, "statistics": { "num_rows": <count>, "size_in_bytes": <bytes>, "table_change_stats": { "inserted": <count>, "deleted": <count...
The input Transact-SQL batch declares a local variable of the same name as a parameter declared in@params. The statement references temporary tables. The query includes the creation of a permanent table that is then queried. If@tsqlhas no parameters, other than parameters declared in@params, ...
/* code to prompt user for a query, then to generate */ /* a select-statement in the stmt1_str */ EXEC SQL PREPARE STMT1_NAME FROM :stmt1_str; ... /* code to set SQLN to zero and to allocate the SQLDA */ EXEC SQL DESCRIBE STMT1_NAME INTO :sqlda; ... /* code to ...
QUERY_LEVEL 针对整个 SQL 的建议 NODE_LEVEL 针对单个物理节点的建议 PLAN_ADVICE 提供针对如下问题的建议 分组聚合(Group Aggregation)时产生的数据倾斜 非确定性更新 若检测到分组聚合可以启用两阶段优化但未开启时,优化器(optimizer)将会把建议 id 附在 GroupAggregate 节点内作为索引,在最后附上建议内容。 1、示...
For older versions of SQL Server where the query store is not available, you can use the view sys.dm_exec_cached_plans in conjunction with the functions sys.dm_exec_sql_text and sys.dm_exec_query_plan to return information about execution plans. However, unlike wi...
The way the query in the above example works is that the SQL database is told via the semicolon “;” that the statement has ended and that there is another statement that should be run. The database then processes the next statement as instructed, which would result in the deletion of...
InternalError.DbOperationFailedFailed to query the database. InternalError.GetDbConfigFailedFailed to get database instance parameters. InvalidParameter.GenericParameterErrorAn error occurred while verifying parameter validity. ResourceNotFound.NoInstanceFoundThe specified database instance was not found. ...