rok commented on code in PR #37298:
URL: https://github.com/apache/arrow/pull/37298#discussion_r1581445564
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cpp/src/arrow/extension_type.cc:
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@@ -145,12 +146,17 @@ static void CreateGlobalRegistry() {
g_registry = std::make_shared<ExtensionTypeRegistryImpl>();
#ifdef ARROW_JSON
Review Comment:
`fixed_shape_tensor` uses rapidjson to serialize and deserialize metadata
(see `FixedShapeTensorType::Serialize` and `FixedShapeTensorType::Deserialize`)
of the type so we need `ARROW_JSON` to build it. UUID has no metadata to
serialize so we don't require JSON. It's annoying that for some builds we get
all extensions and for some only a subset, but I don't have a better idea.
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