arrow-ipc: Remove all abilities to preserve dict IDs #7940
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@tustvold @alamb @thinkharderdev @adriangb this one should be very uncontroversial and easy to review as it's just following through with the previously agreed upon deprecations. |
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alamb
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Jul 17, 2025
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Thanks @brancz and @adriangb -- likewise this makes sense to me
cc @thinkharderdev @Dandandan @crepererum as I think your systems also use dict_id maybe in the past
crepererum
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Thanks again @brancz |
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Which issue does this PR close?
Does not yet close, but contributes towards:
dict_idequality in field merging #6356dict_idfromarrow_schema::field::Fieldand make dictionary IDs an internal implementation detail of flight encoding/decoding #5981Rationale for this change
See the above issues. And this is a follow up to
dict_id#6873This was also split out from: #7929
What changes are included in this PR?
This removes the API to allow preserving
dict_idset in theSchema'sFieldwithin arrow-ipc and arrow-flight. This is in an effort to remove thedict_idfield entirely and make it an IPC/flight-only concern.Are these changes tested?
Yes, all existing tests continue to pass.
Are there any user-facing changes?
Yes, these previously (in 54.0.0) deprecated functions/fields are removed:
arrow_ipc::DictionaryTracker.set_dict_idarrow_ipc::DictionaryTracker::new_with_preserve_dict_idarrow_ipc::IpcWriteOptions.with_preserve_dict_idarrow_ipc::IpcWriteOptions.preserve_dict_id(function and field)arrow_ipc::schema_to_fbarrow_ipc::schema_to_bytes