Nic*_*net 7 c# regex asp.net asp.net-4.0
后端是PostgreSQL服务器9.1.
我正在尝试构建AdHoc XML报告.报告文件将包含SQL查询,所有这些查询都必须以SELECT语句开头.SQL查询将具有参数.根据相关列的数据类型,这些参数将相应地呈现给用户以提供值.
一个重要的SQL查询:
SELECT * FROM customers
WHERE
(
customers.customer_code=@customer_code AND customers.location=@location
AND customers.type=
(
SELECT type from types
WHERE types.code=@type_code
AND types.is_active = @type_is_active
)
AND customers.account_open_date BETWEEN @start_date AND @end_date
)
OR customers.flagged = @flagged;
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我想从查询字符串中获取列名和参数的列表,并将它们放入字符串数组中并稍后处理.
我能够使用以下正则表达式仅匹配参数:
@(?)(?<parameter>\w+)
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预期比赛:
customers.customer_code=@customer_code
customers.location=@location
types.code=@type_code
types.is_active = @type_is_active
customers.account_open_date BETWEEN @start_date AND @end_date
customers.flagged = @flagged
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如何立即匹配"@Parameter","="和"BETWEEN"?
我知道有点晚了,但为了未来的研究:
我认为这个正则表达式符合您的目的:
(\w+\.\w+(?:\s?\=\s?\@\w+|\sBETWEEN\s\@\w+\sAND\s\@\w+))
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在这里检查这个 Regex101 小提琴,并仔细阅读它每个部分的解释。
基本上,它首先查找您的customer.xxx_yyy列,然后查找 for= @variable或BETWEEN @variable1 AND @variable2。
捕获的组:
MATCH 1
1. [37-75]
`customers.customer_code=@customer_code`
MATCH 2
1. [80-108]
`customers.location=@location`
MATCH 3
1. [184-205]
`types.code=@type_code`
MATCH 4
1. [218-251]
`types.is_active = @type_is_active`
MATCH 5
1. [266-327]
`customers.account_open_date BETWEEN @start_date AND @end_date`
MATCH 6
1. [333-361]
`customers.flagged = @flagged`
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