Struct polars_io::parquet::ParquetReader [−][src]
pub struct ParquetReader<R> { /* fields omitted */ }
This is supported on crate feature
feature
only.Expand description
Read Apache parquet format into a DataFrame.
Implementations
pub fn finish_with_scan_ops(
self,
predicate: Option<Arc<dyn PhysicalIoExpr>>,
aggregate: Option<&[ScanAggregation]>,
projection: Option<&[usize]>
) -> Result<DataFrame>
[src]Stop parsing when n
rows are parsed. By settings this parameter the csv will be parsed
sequentially.
Trait Implementations
Auto Trait Implementations
impl<R> RefUnwindSafe for ParquetReader<R> where
R: RefUnwindSafe,
impl<R> Send for ParquetReader<R> where
R: Send,
impl<R> Sync for ParquetReader<R> where
R: Sync,
impl<R> Unpin for ParquetReader<R> where
R: Unpin,
impl<R> UnwindSafe for ParquetReader<R> where
R: UnwindSafe,