Function one_statement_parses_to

datafusion/sql/src/parser.rs:2007–2021

Ensures that `sql` parses as a single [Statement] If `canonical` is non empty,this function additionally asserts that: 1. parsing `sql` results in the same [`Statement`] as parsing `canonical`. 2. re-serializing the result of parsing `sql` produces the same `canonical` sql string

(sql: &str, canonical: &str)

    /// 2. re-serializing the result of parsing `sql` produces the same
    ///    `canonical` sql string
    fn one_statement_parses_to(sql: &str, canonical: &str) -> Statement {
        let mut statements = DFParser::parse_sql(sql).unwrap();
        assert_eq!(statements.len(), 1);

        if sql != canonical {
            assert_eq!(DFParser::parse_sql(canonical).unwrap(), statements);
        }

        let only_statement = statements.pop_front().unwrap();
        assert_eq!(
            canonical.to_uppercase(),
            only_statement.to_string().to_uppercase()
        );
        only_statement
    }

    /// Ensures that `sql` parses as a single [Statement], and that
    /// re-serializing the parse result produces the same `sql`