[−][src]Function arrow::compute::kernels::cast::cast
pub fn cast(array: &ArrayRef, to_type: &DataType) -> Result<ArrayRef>
Cast array to provided data type
Behavior:
- Boolean to Utf8:
true
=> '1',false
=>0
- Utf8 to numeric: strings that can't be parsed to numbers return null, float strings in integer casts return null
- Numeric to boolean: 0 returns
false
, any other value returnstrue
- List to List: the underlying data type is cast
- Primitive to List: a list array with 1 value per slot is created
- Date32 and Date64: precision lost when going to higher interval
- Time32 and Time64: precision lost when going to higher interval
- Timestamp and Date{32|64}: precision lost when going to higher interval
- Temporal to/from backing primitive: zero-copy with data type change
Unsupported Casts
- To or from
StructArray
- List to primitive
- Utf8 to boolean