Function parse_return

nodedb/src/engine/graph/pattern/compiler/clauses.rs:100–137

Parse RETURN columns.

(text: &str)

/// Parse RETURN columns.
pub(super) fn parse_return(text: &str) -> (Vec<ReturnColumn>, bool) {
    let trimmed = text.trim();
    if trimmed.is_empty() || trimmed == "*" {
        return (Vec::new(), false);
    }

    // Strip DISTINCT keyword.
    let (effective, distinct) = {
        let upper = trimmed.to_uppercase();
        if upper.starts_with("DISTINCT ") {
            (&trimmed[9..], true)
        } else {
            (trimmed, false)
        }
    };

    let columns = split_top_level_commas(effective)
        .into_iter()
        .map(|col| {
            let col = col.trim();
            let upper = col.to_uppercase();
            if let Some(as_pos) = upper.rfind(" AS ") {
                let expr = col[..as_pos].trim().to_string();
                let alias = col[as_pos + 4..].trim().to_string();
                ReturnColumn {
                    expr,
                    alias: Some(alias),
                }
            } else {
                ReturnColumn {
                    expr: col.to_string(),
                    alias: None,
                }
            }
        })
        .collect();
    (columns, distinct)
}

/// Parse ORDER BY columns.
pub(super) fn parse_order_by(text: &str) -> Vec<OrderByColumn> {