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docs(capabilities): register ibis-sqlite TimestampBucket gap in KNOWN_GAPS (item 99) #293

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Merged
discreteds merged 1 commit into from
Aug 17, 2026
Merged

docs(capabilities): register ibis-sqlite TimestampBucket gap in KNOWN_GAPS (item 99) #293

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9 changes: 8 additions & 1 deletion docs/reference/expression-coverage.json
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Original file line number Diff line number Diff line change
Expand Up @@ -71096,6 +71096,13 @@
"since": "2026-08-06"
}
],
"gaps": [],
"gaps": [
{
"gap_kind": "other",
"reason": "ibis-sqlite's TimestampBucket has no compilation rule, so a multi-digit MA-wrapper duration string (e.g. dt.truncate('2d')) on ibis-sqlite raises a raw native OperationNotDefinedError rather than a clean BackendCapabilityError. A DURATION_MULTIPLIER-class fact for this would need a corresponding class-backed OptionCell, which the 4-fixture argument-type matrix cannot instantiate for ibis-sqlite (same structural limit as test_option_fact_integrity.py's _MATRIX_UNREACHABLE_DIALECT_FACTS) -- see backlog item 99.",
"since": "2026-08-16",
"review_due": "2027-02-15"
}
],
"retired": []
}
4 changes: 3 additions & 1 deletion docs/reference/expression-coverage.md
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Expand Up @@ -591,7 +591,9 @@ Cells whose facts are all scoped (dialect / parameter / option / value-class) ha

## Known gaps

None recorded.
| Kind | Reason | Since | Review due |
| --- | --- | --- | --- |
| other | ibis-sqlite's TimestampBucket has no compilation rule, so a multi-digit MA-wrapper duration string (e.g. dt.truncate('2d')) on ibis-sqlite raises a raw native OperationNotDefinedError rather than a clean BackendCapabilityError. A DURATION_MULTIPLIER-class fact for this would need a corresponding class-backed OptionCell, which the 4-fixture argument-type matrix cannot instantiate for ibis-sqlite (same structural limit as test_option_fact_integrity.py's _MATRIX_UNREACHABLE_DIALECT_FACTS) -- see backlog item 99. | 2026-08-16 | 2027-02-15 |

## Retirement changelog

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23 changes: 18 additions & 5 deletions src/mountainash/core/capabilities/gaps.py
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Expand Up @@ -6,9 +6,22 @@
"""
from __future__ import annotations

from typing import TYPE_CHECKING
from mountainash.core.capabilities.schema import GapKind, KnownGap

if TYPE_CHECKING:
from mountainash.core.capabilities.schema import KnownGap

KNOWN_GAPS: tuple[KnownGap, ...] = ()
KNOWN_GAPS: tuple[KnownGap, ...] = (
KnownGap(
gap_kind=GapKind.OTHER,
reason=(
"ibis-sqlite's TimestampBucket has no compilation rule, so a "
"multi-digit MA-wrapper duration string (e.g. dt.truncate('2d')) "
"on ibis-sqlite raises a raw native OperationNotDefinedError "
"rather than a clean BackendCapabilityError. A "
"DURATION_MULTIPLIER-class fact for this would need a "
"corresponding class-backed OptionCell, which the 4-fixture "
"argument-type matrix cannot instantiate for ibis-sqlite (same "
"structural limit as test_option_fact_integrity.py's "
"_MATRIX_UNREACHABLE_DIALECT_FACTS) -- see backlog item 99."
),
since="2026-08-16",
),
)
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