@Evolving public interface SupportsPushDownRequiredColumns extends ScanBuilder
ScanBuilder
. Data sources can implement this
interface to push down required columns to the data source and only read these columns during
scan to reduce the size of the data to be read.Modifier and Type | Method and Description |
---|---|
void |
pruneColumns(StructType requiredSchema)
Applies column pruning w.r.t.
|
build
void pruneColumns(StructType requiredSchema)
Scan.readSchema()
implementation should take care of the column
pruning applied here.