Constant INTERVAL_YEAR_MONTH_TYPE_REF 

pub const INTERVAL_YEAR_MONTH_TYPE_REF: u32 = 1; // 1u32

👎Deprecated since 41.0.0: Use Substrait IntervalYear type instead

For DataType::Interval with IntervalUnit::YearMonth.

An i32 for elapsed whole months. See also ScalarValue::IntervalYearMonth for the literal definition in DataFusion.