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Fix | GetSchema("DataTypes") does not report json type on Azure SQL (… - #4682
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #4682 +/- ##
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- Coverage 66.27% 64.05% -2.22%
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Files 290 284 -6
Lines 45062 68018 +22956
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+ Hits 29865 43571 +13706
- Misses 15197 24447 +9250
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mdaigle
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mdaigle
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The fix should work, so I won't block on reflection tech debt.
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Three conflicts, all in code that main changed underneath this branch. The json type is now reported from the negotiated JSONSUPPORT capability rather than the server version (#4682), which is the same change this branch made for the vector type. The two gates are independent, so the factory now carries both and LoadDataTypesDataTables takes each. In the simulated server tests, main rewrote the comment above TestConnWithUserAgentFeatureExtension as an XML doc comment while this branch added the vector feature extension tests above it. Both are kept. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: e17ed782-c576-4cb7-9b4b-7ad286d7a7d0
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Description
SqlMetaDataFactorypreviously determined whether to include thejsondata typein the
GetSchema("DataTypes")result by comparing the server version string againsta minimum version of
"17.00.000.0". This check fails for Azure SQL because Azure SQLalways reports version
12.00.xxxxin the LoginAck response, regardless of whichfeatures it actually supports.
The fix replaces the version-based check with
ConnectionCapabilities.JsonType, aboolean flag that is set to
truewhen the server sends a FEATUREEXTACK token0x0Dduring login. This token is already parsed and stored for other json-related features
and accurately reflects json support on both on-premises SQL Server 2025+ and Azure SQL.
No API changes. No backwards compatibility concerns. No localization changes.
Issues
Fixes #4592
Testing
Unit tests added in
tests/UnitTests/Microsoft/Data/SqlClient/SqlMetaDataFactoryDataTypesTest.cs:DataTypesTable_ContainsJson_WhenJsonTypeSupported— verifies thatjsonappearsin the
DataTypescollection whenConnectionCapabilities.JsonTypeistrue.DataTypesTable_DoesNotContainJson_WhenJsonTypeNotSupported— verifies thatjsondoes not appear when
ConnectionCapabilities.JsonTypeisfalse, covering the AzureSQL scenario where the server version is always
12.x.Both tests construct a
SqlMetaDataFactorydirectly using the production XML metadataresource and a
ConnectionCapabilitiesinstance with the relevant flag set.Integration testing against a live Azure SQL instance with json support enabled would
confirm the end-to-end behavior but was not performed in this contribution. The unit
tests cover the decision logic that was broken.