Uses of Class
dev.hardwood.schema.ColumnProjection

Packages that use ColumnProjection

Package	Description
dev.hardwood.avro	Avro integration for materializing Parquet rows as Avro GenericRecord instances.
dev.hardwood.reader	Parquet file readers with row-oriented and column-oriented APIs.
dev.hardwood.schema	High-level Parquet schema types with computed definition and repetition levels.

Uses of ColumnProjection in dev.hardwood.avro

Methods in dev.hardwood.avro with parameters of type ColumnProjection

Modifier and Type	Method	Description
AvroReaders.RowReaderBuilder	AvroReaders.RowReaderBuilder.projection(ColumnProjection projection)	Restrict reading to the given columns.

Uses of ColumnProjection in dev.hardwood.reader

Methods in dev.hardwood.reader with parameters of type ColumnProjection

Modifier and Type	Method	Description
ParquetFileReader.ColumnReadersBuilder	ParquetFileReader.buildColumnReaders(ColumnProjection projection)	Begin configuring a ColumnReaders collection for batch-oriented access to a column projection.
ColumnReaders	ParquetFileReader.columnReaders(ColumnProjection projection)	Shortcut for ParquetFileReader.buildColumnReaders(ColumnProjection).build() — every row group, no filter.
ParquetFileReader.RowReaderBuilder	ParquetFileReader.RowReaderBuilder.projection(ColumnProjection projection)	Restrict reading to the given columns.

Uses of ColumnProjection in dev.hardwood.schema

Methods in dev.hardwood.schema that return ColumnProjection

Modifier and Type	Method	Description
static ColumnProjection	ColumnProjection.all()	Returns a projection that includes all columns.
static ColumnProjection	ColumnProjection.columns(String... names)	Returns a projection that includes only the specified columns.

Methods in dev.hardwood.schema with parameters of type ColumnProjection

Modifier and Type	Method	Description
static ProjectedSchema	ProjectedSchema.create(FileSchema schema, ColumnProjection projection)	Creates a projected schema from the given full schema and projection.