Method normalize_query

src/cache/query.rs:144–177

Normalize query for cache key Removes extra whitespace, lowercases keywords, but preserves string literals

(query: &str)

    /// Normalize query for cache key
    /// Removes extra whitespace, lowercases keywords, but preserves string literals
    pub fn normalize_query(query: &str) -> String {
        let mut normalized = String::with_capacity(query.len());
        let mut in_string = false;
        let mut string_delimiter = '\0';
        let chars = query.chars().peekable();
        
        for ch in chars {
            match ch {
                '\'' | '"' if !in_string => {
                    in_string = true;
                    string_delimiter = ch;
                    normalized.push(ch);
                }
                ch if ch == string_delimiter && in_string => {
                    in_string = false;
                    string_delimiter = '\0';
                    normalized.push(ch);
                }
                ' ' | '\t' | '\n' | '\r' if !in_string => {
                    // Collapse whitespace
                    if !normalized.ends_with(' ') && !normalized.is_empty() {
                        normalized.push(' ');
                    }
                }
                ch if !in_string => {
                    // Lowercase keywords outside strings
                    normalized.push(ch.to_ascii_lowercase());
                }
                ch => normalized.push(ch),
            }
        }
        
        normalized.trim().to_string()
    }
}