Function rewrite_arrow_distance

nodedb-sql/src/parser/preprocess/vector_ops.rs:13–15

Rewrite all occurrences of `expr <-> expr` to `vector_distance(expr, expr)`. Handles: `column_name <-> ARRAY[...]`, `column <-> $param`, etc. Returns `None` if no valid `<->` patterns are found outside string literals, quoted identifiers, or comments.

(sql: &str)

/// Returns `None` if no valid `<->` patterns are found outside string
/// literals, quoted identifiers, or comments.
pub(super) fn rewrite_arrow_distance(sql: &str) -> Option<String> {
    rewrite_binary_op(sql, "<->", "vector_distance")
}

/// Extract the left operand before `<->`: a column name or dotted path.
fn extract_left_operand(before: &str) -> Option<String> {