New in version 3.5.
Driver short name
Parquet component of the Apache Arrow C++ library
From https://databricks.com/glossary/what-is-parquet: “Apache Parquet is an open source, column-oriented data file format designed for efficient data storage and retrieval. It provides efficient data compression and encoding schemes with enhanced performance to handle complex data in bulk. Apache Parquet is designed to be a common interchange format for both batch and interactive workloads.”
This driver also supports geometry columns using the GeoParquet specification.
The driver should be considered experimental as the GeoParquet specification is not finalized yet.
This driver supports the
This driver supports georeferencing
This driver supports virtual I/O operations (/vsimem/, etc.)
The driver supports creating only a single layer in a dataset.
Layer creation options
COMPRESSION=string: Compression method. Can be one of
LZ4_HADOOP. Available values depend on how the Parquet library was compiled. Defaults to SNAPPY when available, otherwise NONE.
GEOMETRY_ENCODING=WKB/WKT/GEOARROW: Geometry encoding. Defaults to WKB. Other encodings (WKT and GEOARROW) are not allowed by the GeoParquet specification, but are handled as an extension, for symmetry with the Arrow driver.
ROW_GROUP_SIZE=integer: Maximum number of rows per group. Default is 65536.
GEOMETRY_NAME=string: Name of geometry column. Default is
FID=string: Name of the FID (Feature Identifier) column to create. If none is specified, no FID column is created. Note that if using ogr2ogr with the Parquet driver as the target driver and a source layer that has a named FID column, this FID column name will be automatically used to set the FID layer creation option of the Parquet driver (unless
-lco FID=is used to set an empty name)
POLYGON_ORIENTATION=COUNTERCLOCKWISE/UNMODIFIED: Whether exterior rings of polygons should be counterclockwise oriented (and interior rings clockwise oriented), or left to their original orientation. The default is COUNTERCLOCKWISE.
EDGES=PLANAR/SPHERICAL: How to interpret the edges of the geometries: whether the line between two points is a straight cartesian line (PLANAR) or the shortest line on the sphere (geodesic line) (SPHERICAL). The default is PLANAR.
CREATOR=string: Name of creating application.
SQL statements are run through the OGR SQL engine. Statistics can be used to speed-up evaluations of SQL requests like: “SELECT MIN(colname), MAX(colname), COUNT(colname) FROM layername”
Dataset/partitioning read support
Starting with GDAL 3.6.0, the driver can read directories that contain several
Parquet files, and expose them as a single layer. This support is only enabled
if the driver is built against the
arrowdataset C++ library.
Note that no optimization is currently done regarding filtering.
Starting with GDAL 3.6.0, the driver will use up to 4 threads for reading (or the
maximum number of available CPUs returned by
it is lower by 4). This number can be configured with the configuration option
GDAL_NUM_THREADS, which can be set to an integer value or