看官方文档: http://www.postgresql.org/docs/current/static/sql-prepare.html PREPARE creates a prepared statement. A prepared statement is a server-side object that can be used to optimize performance. When the PREPARE statement is executed, the specified s
今日思语:不喜欢再见 说再见,因为有时明知道下一次再见已是遥遥无期或是不再见 错误如下: ERROR 1615 (HY000) at line 406 in file: 'update-mysql.sql': Prepared statement needs to be re-prepared 这个地方是执行了调用一个存储过程.解决方式是重设了mysql的两个缓存大小变量的值,如下: table_open_cache: 表高速缓存的大小 table_definition_cache:表定义信息缓
问题是这样,我在对数据库进行写操作(添加.删除.修改)时,我想同时删除两个表中的两条关联数据,像这样 let sql = ` DELETE FROM bridge_parts WHERE id = $1; DELETE FROM bridge_quantity WHERE bridge_part_id = $2` 然后使用 client.query(sql,[item1,item2]) 来执行删除操作,这个时候问题出现了,pgsql报错,错误如下 cannot insert multiple c
可以参考: http://stackoverflow.com/questions/196652/prepared-statement-vs-stored-procedure They are not really the same thing - with stored procedures, your database logic resides inside the database. Prepared statements basically avoid re-parsing querie
The PREPARE statement creates an executable SQL statement from a string form of the statement. The character-string form is called a statement string. The executable form is called a prepared statement. Invocation This statement can only be embedded
Both parameterized queries and prepared statements are exactly the same thing. Prepared statement seems to be the more commonly used term, but there is no difference between both terms. Parameterized queries and prepared statements are features of da