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Fix | Enable SqlBulkCopy to target tables in Azure Synapse Analytics dedicated SQL pools #4176

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paulmedynski merged 3 commits into from
Apr 13, 2026
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Fix | Enable SqlBulkCopy to target tables in Azure Synapse Analytics dedicated SQL pools #4176

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d9553ea
Update metadata query to fix Synapse SQL dedicated pool compatibility
edwardneal Apr 9, 2026
15c6115
Copilot review response
edwardneal Apr 10, 2026
5397173
Add explanatory comment
edwardneal Apr 10, 2026
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20 changes: 18 additions & 2 deletions src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/SqlBulkCopy.cs
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Expand Up @@ -505,16 +505,32 @@ private string CreateInitialQuery()
SELECT @@TRANCOUNT;

DECLARE @Object_ID INT = OBJECT_ID('{escapedObjectName}');
DECLARE @Column_Name_Query_SELECT NVARCHAR(MAX);
DECLARE @Column_Name_Query_FILTER NVARCHAR(MAX);
DECLARE @Column_Name_Query_SORT NVARCHAR(MAX);
DECLARE @Column_Name_Query NVARCHAR(MAX);
DECLARE @Column_Names NVARCHAR(MAX) = NULL;

IF SERVERPROPERTY('EngineEdition') = 6
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BEGIN
SET @Column_Name_Query_SELECT = N'SELECT @Column_Names = STRING_AGG(QUOTENAME([name]), '', '') WITHIN GROUP (ORDER BY [column_id] ASC)';
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SET @Column_Name_Query_SORT = N'';
END
ELSE
BEGIN
SET @Column_Name_Query_SELECT = 'SELECT @Column_Names = COALESCE(@Column_Names + '', '', '''') + QUOTENAME([name])';
SET @Column_Name_Query_SORT = N'ORDER BY [column_id] ASC';
END

IF EXISTS (SELECT TOP 1 * FROM sys.all_columns WHERE [object_id] = OBJECT_ID('sys.all_columns') AND [name] = 'graph_type')
BEGIN
SET @Column_Name_Query = N'SELECT @Column_Names = COALESCE(@Column_Names + '', '', '''') + QUOTENAME([name]) FROM {CatalogName}.[sys].[all_columns] WHERE [object_id] = @Object_ID AND COALESCE([graph_type], 0) NOT IN (1, 3, 4, 6, 7) ORDER BY [column_id] ASC;';
SET @Column_Name_Query_FILTER = N'WHERE [object_id] = @Object_ID AND COALESCE([graph_type], 0) NOT IN (1, 3, 4, 6, 7)';
END
ELSE
BEGIN
SET @Column_Name_Query = N'SELECT @Column_Names = COALESCE(@Column_Names + '', '', '''') + QUOTENAME([name]) FROM {CatalogName}.[sys].[all_columns] WHERE [object_id] = @Object_ID ORDER BY [column_id] ASC;';
SET @Column_Name_Query_FILTER = N'WHERE [object_id] = @Object_ID';
END
SET @Column_Name_Query = @Column_Name_Query_SELECT + ' FROM {CatalogName}.[sys].[all_columns] ' + @Column_Name_Query_FILTER + ' ' + @Column_Name_Query_SORT + ';'

EXEC sp_executesql @Column_Name_Query, N'@Object_ID INT, @Column_Names NVARCHAR(MAX) OUTPUT', @Object_ID = @Object_ID, @Column_Names = @Column_Names OUTPUT;
SELECT @Column_Names = COALESCE(@Column_Names, '*');
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4 changes: 2 additions & 2 deletions src/Microsoft.Data.SqlClient/tests/ManualTests/SQL/SqlBulkCopyTest/CopyAllFromReader.cs
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Expand Up @@ -61,9 +61,9 @@ public static void Test(string srcConstr, string dstConstr, string dstTable)
DataTestUtility.AssertEqualsWithDescription((long)3, stats["BuffersReceived"], "Unexpected BuffersReceived value.");
DataTestUtility.AssertEqualsWithDescription((long)3, stats["BuffersSent"], "Unexpected BuffersSent value.");
DataTestUtility.AssertEqualsWithDescription((long)0, stats["IduCount"], "Unexpected IduCount value.");
DataTestUtility.AssertEqualsWithDescription((long)8, stats["SelectCount"], "Unexpected SelectCount value.");
DataTestUtility.AssertEqualsWithDescription((long)11, stats["SelectCount"], "Unexpected SelectCount value.");
DataTestUtility.AssertEqualsWithDescription((long)3, stats["ServerRoundtrips"], "Unexpected ServerRoundtrips value.");
DataTestUtility.AssertEqualsWithDescription((long)11, stats["SelectRows"], "Unexpected SelectRows value.");
DataTestUtility.AssertEqualsWithDescription((long)14, stats["SelectRows"], "Unexpected SelectRows value.");
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DataTestUtility.AssertEqualsWithDescription((long)2, stats["SumResultSets"], "Unexpected SumResultSets value.");
DataTestUtility.AssertEqualsWithDescription((long)0, stats["Transactions"], "Unexpected Transactions value.");
}
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