[doc](Nereids) add doc for NO_BACKSLASH_ESCAPES (#26995)

docs/en/docs/advanced/sql-mode.md

@@ -66,6 +66,11 @@ show session variables
 1. `PIPES_AS_CONCAT`
 
 In this mode, the '||' symbol is a string concatenation symbol (same as the CONCAT() function), not a synonym for the 'OR' symbol. (e.g., `'a'||'b' = 'ab'`, `1||0 = '10'`)
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+2. `NO_BACKSLASH_ESCAPES`
+
+Enabling this mode disables the backslash character (\\) from functioning as an escape character within strings and identifiers. When this mode is enabled, the backslash is treated as a regular character without any special meaning
+
 ## composite mode
 
 (subsequent additions)

docs/zh-CN/docs/advanced/sql-mode.md

@@ -71,6 +71,12 @@ show session variables
 
    在此模式下，'||'符号是一种字符串连接符号（同CONCAT()函数），而不是'OR'符号的同义词。(e.g., `'a'||'b' = 'ab'`, `1||0 = '10'`)
 
+2. `NO_BACKSLASH_ESCAPES`
+
+   启用此模式将禁用反斜杠字符（\）作为字符串和标识符中的转义字符。启用此模式后，反斜杠将变成一个普通字符，与其他字符一样。(e.g., `\b = \\b`, )
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+  
+
 ## 复合mode
 
 （后续补充）