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iceberg-cxx
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Apache Iceberg C++ library
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Apache Iceberg C++ library # Apache Icebergโข C++ You do not need Java to use [Apache Icebergโข](https://iceberg.apache.org/). It's an alternative for [iceberg-cpp](https://github.com/apache/iceberg-cpp). The library is used by [Tea](https://github.com/lithium-tech/tea), an open-source extension for Greenplum that allows it to read Iceberg data from S3 compatible storage using HMS and Nessie catalogs. ## Supported features Source https://iceberg.apache.org/status/ ### Data types | Data type | Iceberg version | Cxx | Java | |--------------------------|---|-----|-----| | boolean | 2 | + | + | | int | 2 | + | + | | float | 2 | + | + | | double | 2 | + | + | | decimal | 2 | + | + | | date | 2 | + | + | | time | 2 | + | + | | timestamp | 2 | + | + | | timestamptz | 2 | + | + | | timestamp_ns | 3 | + | + | | timestamptz_ns | 3 | + | + | | string | 2 | + | + | | uuid | 2 | + | + | | fixed | 2 | + | + | | binary | 2 | + | + | | variant | 3 | - | + | | list | 2 | + | + | | map | 2 | - | + | | struct | 2 | - | + | | unknown | 3 | + | ? | #### Datetime types restrictions Datetime restrictions are defined in [Iceberg spec](https://iceberg.apache.org/spec/?h=timestamp_ns#parquet). For `date` underlying type is `int32`. For `time*` it's `int64`. `timestamp` and `timestamptz` store microseconds from `1970-01-01 00:00:00.000000`. `timestamp_ns` and `timestamptz_ns` store nanoseconds from `1970-01-01 00:00:00.000000000`. `tz` suffix means the time is adjusted to UTC. ### Data files format | File format | Cxx | Java | |---------------|-----|-----| | Parquet | + | + | | ORC | - | + | | Puffin | + | + | | Avro | - | + | ### File IO | File IO | Cxx | Java | |--------------------|-----|-----| | Local Filesystem | + | + | | Hadoop Filesystem | - | + | | S3 Compatible | + | + | | GCS Compatible | - | + | | ADLS Compatible | - | + | ### Table Maintenance Operations Not implemented ### Table Update Operations Not implemented ### Table read operations | Operation | Iceberg version | Cxx | Java | |------------------------------|-----|-----|-----| | Plan with data file | 1,2 | + | + | | Plan with position deletes | 2 | + | + | | Plan with equality deletes | 2 | + | + | | Plan with puffin statistics | 1,2 | - | + | | Read data file | 1,2 | + | + | | Read with position deletes | 2 | + | + | | Read with equality deletes | 2 | + | + | ### Table write operations | Operation | Iceberg version | Cxx | Java | |---------------------------|-----|-----|-----| | Append data | 1,2 | + | + | | Write position deletes | 2 | - | + | | Write equality deletes | 2 | - | + | | Write deletion vectors | 3 | + | + | ### Catalog | Table Operation | Nessie | Glue | HMS | REST | |----------------------------|-----|-----|-----|-----| | listTable | - | - | - | - | | createTable | - | - | - | - | | dropTable | - | - | - | - | | loadTable | +- | - | +- | +- | | updateTable | - | - | - | - | | renameTable | - | - | - | - | | tableExists | - | - | - | - | | createView | - | - | - | - | | dropView | - | - | - | - | | listView | - | - | - | - | | viewExists | - | - | - | - | | replaceView | - | - | - | - | | renameView | - | - | - | - | | listNamespaces | - | - | - | - | | createNamespace | - | - | - | - | | dropNamespace | - | - | - | - | | namespaceExists | - | - | - | - | | updateNamespaceProperties | - | - | - | - | | loadNamespaceMetadata | - | - | - | - | ## Requirements - C++20 compliant compiler - CMake 3.20 or higher - OpenSSL ### Build, Run Test You have to [download Apache Arrow dependencies](https://arrow.apache.org/docs/15.0/developers/cpp/building.html#offline-builds) first. ```bash mkdir _deps && cd _deps git clone --single-branch -b maint-15.0.2 https://github.com/apache/arrow.git cd arrow && git apply ../../vendor/arrow/fix_c-ares_url.patch && cd .. ./arrow/cpp/thirdparty/download_dependencies.sh ./arrow-thirdparty ``` ```bash mkdir _build cd _build ln -s ../_deps/arrow-thirdparty arrow-thirdparty cmake -GNinja ../ ninja cd tests/ ../iceberg/iceberg-cpp-test ../iceberg/common/fs/iceberg_common_fs_test ./iceberg_local_test ```
