具体报错信息如下: 2019-12-04 11:23:08.993 ERROR 2756 --- [nio-9006-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSy...
### The error may involve com.example.myshardingjdbc.mapper.TImageMapper.insert-Inline ### The error occurred while setting parameters ### SQL: insert into t_image (image_id,title, small_image, path, create_user, create_time, update_user, update_time, is_delete, is_enable) values (?
Updates multiple tables by inserting one or more rows with column values (from a query) into the tables. Supports both unconditional and conditional inserts.See also: INSERT Syntax -- Unconditional multi-table insert INSERT [ OVERWRITE ] ALL intoClause [ ... ] <subquery> -- Conditional multi...
The "external" DataSource would be used by the SQL layer to represent ingestion sources, and would be used to help generate ingestion tasks, but it would not understood by the native query execution system. Structure planning such that only Scan and GroupBy are used as the native query types...
通过将多个查询结果合并为一条insert语句,可以减少与数据库的交互次数,从而减少了网络开销和数据库负载。 这种技术在以下场景中特别有用: 批量插入数据:当需要向数据库中插入大量数据时,将多个插入操作合并为一条insert语句可以显著提高插入的速度。 聚合统计数据:当需要对数据库中的数据进行聚合统计时,将多个聚合查询...
Hint: always write a SQL query to select the lookup columns from the reference data set. Never use the drop down; it selects all columns and wastes memory. If you select only the columns you actually need, chances are good that you can fit everything in memory with the full c...
src/prefect/server/database/query_components.py~L1265 return [Edge(id=id) for id in value] def time( - value: Union[str, datetime.datetime, None] + value: Union[str, datetime.datetime, None], ) -> Optional[pendulum.DateTime]: if not value: return None python/mypy (+3 -3 lines ac...