这是我第一次尝试使用tdbc包(ODBC连接),我无法弄清楚如何将参数传递给查询。这是代码:
set dsnName dsn1
set username user1
set password xxxxx
set connStr "DSN=$dsnName; UID=$username; PWD=$password;"
tdbc::odbc::connection create db $connStr
set rows [db allrows {SELECT DISTINCT [Address] FROM [Customers] WHERE [Apt Number]='3-b'}]
这很有效。但是,我想将'3-b'传递给查询。所以我试过了:
set queryValues [dict create apt 3-b]
set rows [db allrows {SELECT DISTINCT [Address] FROM [Customers] WHERE [Apt Number]=':apt'} $queryValues]
但这给了我一个错误([Microsoft] [ODBC SQL Server驱动程序]字符串数据,右截断)或类似的东西。 我试过不同的格式,什么都没有用。我做错了什么?
(根据格伦的回答,我也尝试过:
set stmt [db prepare {SELECT DISTINCT [Address] FROM [Customers] WHERE [Apt Number]=:apt}]
set params [dict create apt "3-b"]
set rows [$stmt allrows $params]
相同错误([1] [Microsoft] [ODBC SQL Server驱动程序]字符串数据,右截断)
但这是有效的。
set stmt [db prepare {SELECT DISTINCT [Address] FROM [Customers] WHERE [Apt Number]='3-b'}]
set rows [$stmt allrows]
我还必须补充一点,tclodbc包在这里运行正常。请参阅以下代码
package require tclodbc
#<connect to database>
#query
set aptNo "3-b"
set query "SELECT DISTINCT \[Address\] FROM \[Customers\] WHERE \[Apt Number\]=?"
set dbResult [$dbConn $query [list $aptNo]]
在tclodbc包中正常工作,但类似的代码在tdbc包中失败。
- 苏雷什
答案 0 :(得分:0)
您需要使用prepared statement
# note, no quotes around the placeholder param name.
set stmt [db prepare {SELECT DISTINCT [Address] FROM [Customers] WHERE [Apt Number]=:apt}]
set params [dict create apt "3-b"]
set rows [$stmt allrows $params]
或者你可以创建一个&#34; apt&#34;局部变量:
set apt "3-b"
set rows [$stmt allrows]