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GH-46599: [C++][Doc][Parquet] Update supported types documentation #46620

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Merged
paleolimbot merged 6 commits into from
Jun 2, 2025
Merged

GH-46599: [C++][Doc][Parquet] Update supported types documentation #46620

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48be3fd
update doc
paleolimbot May 27, 2025
61fe0fc
more accurate footnotes
paleolimbot May 30, 2025
80e1659
one more
paleolimbot May 30, 2025
4defb64
Update docs/source/cpp/parquet.rst
paleolimbot Jun 2, 2025
c9458a4
Update docs/source/cpp/parquet.rst
paleolimbot Jun 2, 2025
6efc1ea
reformat table
paleolimbot Jun 2, 2025
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14 changes: 12 additions & 2 deletions docs/source/cpp/parquet.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -482,6 +482,14 @@ physical type.
+-------------------+-----------------------------+----------------------------+---------+
| FLOAT16 | FIXED_LENGTH_BYTE_ARRAY | HalfFloat | |
+-------------------+-----------------------------+----------------------------+---------+
| UUID | FIXED_LENGTH_BYTE_ARRAY | Extension (arrow.uuid) | |
+-------------------+-----------------------------+----------------------------+---------+
| JSON | BYTE_ARRAY | Extension (arrow.json) | |
+-------------------+-----------------------------+----------------------------+---------+
| GEOMETRY | BYTE_ARRAY | Extension (geoarrow.wkb) | \(6) |
+-------------------+-----------------------------+----------------------------+---------+
| GEOGRAPHY | BYTE_ARRAY | Extension (geoarrow.wkb) | \(6) |
+-------------------+-----------------------------+----------------------------+---------+

* \(1) On the write side, the Parquet physical type INT32 is generated.

Expand All @@ -496,9 +504,11 @@ physical type.
in contradiction with the
`Parquet specification <https://github.com/apache/parquet-format/blob/master/LogicalTypes.md#maps>`__.

*Unsupported logical types:* JSON, BSON, UUID. If such a type is encountered
* \(6) Requires that the geoarrow.wkb extension type is registered.
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*Unsupported logical types:* BSON. If such a type is encountered
when reading a Parquet file, the default physical type mapping is used (for
example, a Parquet JSON column may be read as Arrow Binary or FixedSizeBinary).
example, a Parquet BSON column may be read as Arrow Binary or FixedSizeBinary).

Converted types
~~~~~~~~~~~~~~~
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