Function extract_when_condition

nodedb-sql/src/ddl_ast/parse/trigger.rs:254–293

(
    header_upper: &str,
    header_original: &str,
    tokens_upper: &[String],
    i: &mut usize,
)

}

fn extract_when_condition(
    header_upper: &str,
    header_original: &str,
    tokens_upper: &[String],
    i: &mut usize,
) -> Option<String> {
    if *i >= tokens_upper.len() || tokens_upper[*i] != "WHEN" {
        return None;
    }
    *i += 1;

    let when_pos = header_upper.find("WHEN")?;
    let after_when = header_original[when_pos + 4..].trim_start();
    if !after_when.starts_with('(') {
        return None;
    }
    let mut depth = 0i32;
    let mut end = 0usize;
    for (j, ch) in after_when.char_indices() {
        match ch {
            '(' => depth += 1,
            ')' => {
                depth -= 1;
                if depth == 0 {
                    end = j;
                    break;
                }
            }
            _ => {}
        }
    }
    if depth != 0 {
        return None;
    }
    let condition = after_when[1..end].trim().to_string();
    while *i < tokens_upper.len() && tokens_upper[*i] != "PRIORITY" {
        *i += 1;
    }
    Some(condition)
}

fn parse_priority_token(tokens_orig: &[&str], tokens_upper: &[String], i: &mut usize) -> i32 {
    if *i >= tokens_upper.len() || tokens_upper[*i] != "PRIORITY" {