如何转义 Microsoft Log Parser 查询中的通配符？

Question

如何在 logparser LIKE 条件中提供转义字符？

当前查询：

SELECT EXTRACT_TOKEN(cs-uri-stem,1,'/') AS AppPath, Count(*) AS ReqCount
FROM <MyLogFile> 
WHERE AppPath LIKE '%_%'

示例数据：

+-------------+
| cs-uri-stem |
+-------------+
| 120_ABC     |
| 321_XYZ     |
| 11_BXY      |
| ALPHA       |
| BETA        |
+-------------+

根据以上数据，我只想过滤掉包含下划线的行。

我尝试了 SQL 中常用的转义选项，例如 angle brackets [_]、LIKE '%_%' ESCAPE '\' clause，但它们没有帮助。

Answer 1

来自 Logparser 帮助文件：

Wildcard pattern matching characters can be used as literal characters. To use a wildcard character as a literal character, escape the wildcard character with the '\' (backslash) character.
Examples:
LIKE 'ab_d': matches the "ab_d" string (e.g. "ab_d", "AB_d")
LIKE 'a\%c%': matches all the strings that start with "a%c" (e.g. "a%cdefg", "A%c")

您的查询应如下所示：

SELECT EXTRACT_TOKEN(cs-uri-stem,1,'/') AS AppPath, Count(*) AS ReqCount
FROM <MyLogFile> 
WHERE AppPath LIKE '%\_%'

如何转义 Microsoft Log Parser 查询中的通配符？

How to escape wildcard characters in Microsoft Log Parser query?

escaping

logparser