[英]How to execute a scalar query with oci8 and ruby
I'd like to select a next id from a sequence in oracle using oci8 and ruby. 我想使用oci8和ruby从oracle中的序列中选择下一个id。 What's the easist way of doing so?
这样做的简便方法是什么? Example wrong code:
错误代码示例:
id = @conn.exec( 'Select NEXT_ID.NEXTVAL from dual' )
.exec returns a cursor. .exec返回一个游标。 Is there an easy way of just getting the one value I need from the exec or similar method?
是否有一种简单的方法可以从exec或类似方法中获取我需要的一个值?
@conn.exec('Select NEXT_ID.NEXTVAL from dual') {|row| id = row[0]}
你也可以
id = @conn.exec('Select NEXT_ID.NEXTVAL from dual').fetch[0]
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