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Add support for the Trino client spooling protocol #496

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Add support for the Trino client spooling protocol #496

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mdesmet
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@mdesmet mdesmet commented Nov 22, 2024 •
edited by mosabua
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( ) This is not user-visible or docs only and no release notes are required.
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* Add support for the Trino client spooling protocol

@mdesmet mdesmet marked this pull request as ready for review November 25, 2024 13:50
@mdesmet mdesmet force-pushed the feat/spooled-protocol branch 2 times, most recently from 8ac3e6d to 2dc1909 Compare November 25, 2024 14:06
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mdesmet commented Nov 25, 2024

Currently tests are failing because of trinodb/trino#24226

@mdesmet mdesmet force-pushed the feat/spooled-protocol branch from 2dc1909 to 6ec4713 Compare November 26, 2024 10:09
aalbu
aalbu reviewed Nov 26, 2024
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@mdesmet mdesmet force-pushed the feat/spooled-protocol branch from 6ec4713 to d7f4ee3 Compare November 27, 2024 04:40
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@mdesmet mdesmet force-pushed the feat/spooled-protocol branch from d7f4ee3 to 6dd0ee6 Compare November 27, 2024 08:44
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wendigo commented Nov 27, 2024

Can we skip this one failing test for now?

@mdesmet mdesmet force-pushed the feat/spooled-protocol branch from 6dd0ee6 to f9f2825 Compare November 29, 2024 07:11
damian3031
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wendigo
wendigo reviewed Dec 2, 2024
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Overall LGTM except for decoding logic that needs to be improved

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mosabua
mosabua requested changes Dec 2, 2024
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.with_volume_mapping(str(root / "etc/catalog"), "/etc/trino/catalog")

# Enable spooling config
if TRINO_VERSION >= "466":
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;-)

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trino/constants.py
@@ -37,6 +37,7 @@
HEADER_CLIENT_TAGS = "X-Trino-Client-Tags"
HEADER_EXTRA_CREDENTIAL = "X-Trino-Extra-Credential"
HEADER_TIMEZONE = "X-Trino-Time-Zone"
HEADER_ENCODING = "X-Trino-Query-Data-Encoding"
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we should document that somewhere @wendigo .. dev guide in trino docs maybe?

aalbu
aalbu reviewed Dec 3, 2024
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@mdesmet mdesmet force-pushed the feat/spooled-protocol branch from 992e25c to 5066858 Compare December 3, 2024 11:50
@mdesmet mdesmet force-pushed the feat/spooled-protocol branch from 5066858 to e01887b Compare December 3, 2024 11:57
@mdesmet mdesmet requested review from wendigo, aalbu and mosabua December 3, 2024 12:05
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@mdesmet mdesmet force-pushed the feat/spooled-protocol branch from e01887b to 2a98915 Compare December 4, 2024 08:19
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wendigo commented Dec 4, 2024

@mdesmet this is a good direction, the only comment I have is that the spooled segment data is resolved eagerly, I think that data fetch should happen in the SegmentDecoder when the spooled segment is iterated over, wdyt? (the same applies for ack)

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mdesmet commented Dec 5, 2024

@mdesmet this is a good direction, the only comment I have is that the spooled segment data is resolved eagerly, I think that data fetch should happen in the SegmentDecoder when the spooled segment is iterated over, wdyt? (the same applies for ack)

Actually it is not eagerly fetched. with @abstractproperty it is only fetched at the moment the .data property is used (in the SegmentDecoder decode method.

Following section in SegmentIterator manages both the acknowledgment and loading the next segment. So it actually works as you specify above.

try:
    self._current_segment = segment = next(self._segments)
    self._rows = iter(self._decoder.decode(segment))
except StopIteration:
    self._finished = True

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wendigo commented Dec 5, 2024

LGTM

@mdesmet mdesmet force-pushed the feat/spooled-protocol branch from 2a98915 to 75a9e43 Compare December 5, 2024 07:36
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mdesmet commented Dec 5, 2024

Only remaining issue is making the acknowledge executed in a background thread.

@mdesmet mdesmet requested a review from wendigo December 8, 2024 04:38
@mosabua mosabua changed the title Implement spooled protocol Add support for the spooling protocol Dec 9, 2024
@mosabua mosabua changed the title Add support for the spooling protocol Add support for the Trino client spooling protocol Dec 9, 2024
@mosabua mosabua mentioned this pull request Dec 9, 2024
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@hashhar hashhar Awaiting requested review from hashhar

@damian3031 damian3031 Awaiting requested review from damian3031

@aalbu aalbu Awaiting requested review from aalbu

@mosabua mosabua Awaiting requested review from mosabua

@wendigo wendigo Awaiting requested review from wendigo

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