We are implementing Parquet features gradually, and the table below outlines the current status. If the feature is not listed here it's not supported yet.
| Feature | Reader | Writer |
|---|---|---|
| Plain encoding | yes | yes |
| Bit Packed encoding | yes | yes |
| RLE/Bitpacked Hybrid encoding | yes | yes |
| Plain Dictionary encoding | yes | yes |
| Delta encoding | no | no |
| Data-length byte array encoding | no | no |
| Delta strings encoding | no | no |
| Impala dates | yes | yes |
| Date with different precision | yes | yes |
| Time period | yes | yes |
| GZIP Compression | yes | yes |
| SNAPPY Compression | yes | yes |
| Row groups | yes | yes |
| Data pages | yes | yes |
| Append to files | - | yes |
| Simple repeatable fields | yes | yes |
| Nested structures | yes | yes |
| Map types | yes | yes |