Function parse_tsquery

nodedb-sql/src/functions/fts_ops/tsquery_parser.rs:27–46

Parse a PG `tsquery` string into an `FtsQuery` tree. Empty input is rejected with `SqlError::Parse`.

(input: &str)

///
/// Empty input is rejected with `SqlError::Parse`.
pub fn parse_tsquery(input: &str) -> Result<FtsQuery> {
    let input = input.trim();
    if input.is_empty() {
        return Err(SqlError::Parse {
            detail: "tsquery: empty query string".into(),
        });
    }
    let tokens = tokenize(input);
    let mut pos = 0;
    let query = parse_or(&tokens, &mut pos)?;
    if pos < tokens.len() {
        return Err(SqlError::Parse {
            detail: format!(
                "tsquery: unexpected token '{}' at position {pos}",
                tokens[pos]
            ),
        });
    }
    Ok(query)
}

/// Build an `FtsQuery::Phrase` from whitespace-separated terms.
///