Merge | Add IDBColumnSchemaGenerator interface to netfx SqlDataReader

src/Microsoft.Data.SqlClient/netcore/src/Microsoft.Data.SqlClient.csproj

@@ -437,6 +437,9 @@
     <Compile Include="$(CommonSourceRoot)Microsoft\Data\SqlClient\SqlDataAdapter.cs">
       <Link>Microsoft\Data\SqlClient\SqlDataAdapter.cs</Link>
     </Compile>
+    <Compile Include="$(CommonSourceRoot)Microsoft\Data\SqlClient\SqlDbColumn.cs">
+      <Link>Microsoft\Data\SqlClient\SqlDbColumn.cs</Link>
+    </Compile>  
     <Compile Include="$(CommonSourceRoot)Microsoft\Data\SqlClient\SqlDelegatedTransaction.cs">
       <Link>Microsoft\Data\SqlClient\SqlDelegatedTransaction.cs</Link>
     </Compile>
@@ -654,7 +657,6 @@
     <Compile Include="Microsoft\Data\SqlClient\SqlConnectionFactory.cs" />
     <Compile Include="Microsoft\Data\SqlClient\SqlConnectionHelper.cs" />
     <Compile Include="Microsoft\Data\SqlClient\SqlDataReader.cs" />
-    <Compile Include="Microsoft\Data\SqlClient\SqlDbColumn.cs" />
     <Compile Include="Microsoft\Data\SqlClient\SqlDiagnosticListener.cs" />
     <Compile Include="Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs" />
     <Compile Include="Microsoft\Data\SqlClient\SqlTransaction.cs" />

src/Microsoft.Data.SqlClient/netfx/ref/Microsoft.Data.SqlClient.csproj

@@ -44,5 +44,6 @@
     <PackageReference Include="Microsoft.IdentityModel.JsonWebTokens" Version="$(MicrosoftIdentityModelJsonWebTokensVersion)" />
     <PackageReference Include="System.Buffers" Version="$(SystemBuffersVersion)" />
     <PackageReference Include="System.Text.Json" Version="$(SystemTextJsonVersion)" />
+    <PackageReference Include="System.Data.Common" Version="$(SystemDataCommonVersion)" />
   </ItemGroup>
 </Project>

src/Microsoft.Data.SqlClient/netfx/src/Microsoft.Data.SqlClient.csproj

@@ -631,6 +631,9 @@
     <Compile Include="$(CommonSourceRoot)Microsoft\Data\SqlClient\SqlDataAdapter.cs">
       <Link>Microsoft\Data\SqlClient\SqlDataAdapter.cs</Link>
     </Compile>
+    <Compile Include="$(CommonSourceRoot)Microsoft\Data\SqlClient\SqlDbColumn.cs">
+      <Link>Microsoft\Data\SqlClient\SqlDbColumn.cs</Link>
+    </Compile>  
     <Compile Include="$(CommonSourceRoot)Microsoft\Data\SqlClient\SqlDelegatedTransaction.cs">
       <Link>Microsoft\Data\SqlClient\SqlDelegatedTransaction.cs</Link>
     </Compile>

src/Microsoft.Data.SqlClient/netfx/src/Microsoft/Data/SqlClient/SqlDataReader.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Collections;
+using System.Collections.ObjectModel;
 using System.ComponentModel;
 using System.Data;
 using System.Data.Common;
@@ -27,7 +28,7 @@
 namespace Microsoft.Data.SqlClient
 {
     /// <include file='../../../../../../../doc/snippets/Microsoft.Data.SqlClient/SqlDataReader.xml' path='docs/members[@name="SqlDataReader"]/SqlDataReader/*' />
-    public class SqlDataReader : DbDataReader, IDataReader
+    public class SqlDataReader : DbDataReader, IDataReader, IDbColumnSchemaGenerator
     {
         private enum ALTROWSTATUS
         {
@@ -74,6 +75,7 @@ internal class SharedState
         private CommandBehavior _commandBehavior;
 
         private static int s_objectTypeCount; // EventSource Counter
+        private static readonly ReadOnlyCollection<DbColumn> s_emptySchema = new ReadOnlyCollection<DbColumn>(Array.Empty<DbColumn>());
         internal readonly int ObjectID = Interlocked.Increment(ref s_objectTypeCount);
 
 
@@ -6362,5 +6364,73 @@ private void SwitchToAsyncWithoutSnapshot()
             _stateObj._asyncReadWithoutSnapshot = true;
         }
 
-    }// SqlDataReader
-}// namespace
+        /// <include file='../../../../../../../doc/snippets/Microsoft.Data.SqlClient/SqlDataReader.xml' path='docs/members[@name="SqlDataReader"]/GetColumnSchema/*' />
+        public ReadOnlyCollection<DbColumn> GetColumnSchema()
+        {
+            SqlStatistics statistics = null;
+            try
+            {
+                statistics = SqlStatistics.StartTimer(Statistics);
+                if (_metaData == null || _metaData.dbColumnSchema == null)
+                {
+                    if (this.MetaData != null)
+                    {
+
+                        _metaData.dbColumnSchema = BuildColumnSchema();
+                        Debug.Assert(_metaData.dbColumnSchema != null, "No schema information yet!");
+                        // filter table?
+                    }
+                }
+                if (_metaData != null)
+                {
+                    return _metaData.dbColumnSchema;
+                }
+                return s_emptySchema;
+            }
+            finally
+            {
+                SqlStatistics.StopTimer(statistics);
+            }
+        }
+
+        private ReadOnlyCollection<DbColumn> BuildColumnSchema()
+        {
+            _SqlMetaDataSet md = MetaData;
+            DbColumn[] columnSchema = new DbColumn[md.Length];
+            for (int i = 0; i < md.Length; i++)
+            {
+                _SqlMetaData col = md[i];
+                SqlDbColumn dbColumn = new SqlDbColumn(md[i]);
+
+                if (_typeSystem <= SqlConnectionString.TypeSystem.SQLServer2005 && col.Is2008DateTimeType)
+                {
+                    dbColumn.SqlNumericScale = MetaType.MetaNVarChar.Scale;
+                }
+                else if (TdsEnums.UNKNOWN_PRECISION_SCALE != col.scale)
+                {
+                    dbColumn.SqlNumericScale = col.scale;
+                }
+                else
+                {
+                    dbColumn.SqlNumericScale = col.metaType.Scale;
+                }
+
+                if (_browseModeInfoConsumed)
+                {
+                    dbColumn.SqlIsAliased = col.IsDifferentName;
+                    dbColumn.SqlIsKey = col.IsKey;
+                    dbColumn.SqlIsHidden = col.IsHidden;
+                    dbColumn.SqlIsExpression = col.IsExpression;
+                }
+
+                dbColumn.SqlDataType = GetFieldTypeInternal(col);
+
+                dbColumn.SqlDataTypeName = GetDataTypeNameInternal(col);
+
+                columnSchema[i] = dbColumn;
+            }
+
+            return new ReadOnlyCollection<DbColumn>(columnSchema);
+        }
+    }
+}

src/Microsoft.Data.SqlClient/src/Microsoft.Data.SqlClient.csproj

@@ -10,6 +10,7 @@
 	<ItemGroup>
 	  <PackageReference Include="System.Buffers" Version="$(SystemBuffersVersion)" />
 	  <PackageReference Include="System.Memory" Version="$(SystemMemoryVersion)" />
+    <PackageReference Include="System.Data.Common" Version="$(SystemDataCommonVersion)" Condition="'$(TargetFramework)' == 'net462'" />
 	</ItemGroup>
 
 </Project>

src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/TdsParserHelperClasses.cs

@@ -305,9 +305,7 @@ internal sealed partial class _SqlMetaDataSet
 
         internal DataTable schemaTable;
         private readonly _SqlMetaData[] _metaDataArray;
-#if !NETFRAMEWORK
         internal ReadOnlyCollection<DbColumn> dbColumnSchema;
-#endif
 
         private int _hiddenColumnCount;
         private int[] _visibleColumnMap;
@@ -327,11 +325,9 @@ private _SqlMetaDataSet(_SqlMetaDataSet original)
             id = original.id;
             _hiddenColumnCount = original._hiddenColumnCount;
             _visibleColumnMap = original._visibleColumnMap;
-#if !NETFRAMEWORK
             dbColumnSchema = original.dbColumnSchema;
-#else
             schemaTable = original.schemaTable;
-#endif
+
             if (original._metaDataArray == null)
             {
                 _metaDataArray = null;

src/Microsoft.Data.SqlClient/tests/ManualTests/SQL/UdtTest/SqlServerTypesTest.cs

@@ -252,7 +252,6 @@ private static void TestUdtSqlDataReaderGetStream(CommandBehavior behavior)
         }
 
         // Synapse: Parse error at line: 1, column: 41: Incorrect syntax near 'hierarchyid'.
-        [ActiveIssue("25421", TargetFrameworkMonikers.NetFramework)]
         [ConditionalFact(typeof(DataTestUtility), nameof(DataTestUtility.AreConnStringsSetup), nameof(DataTestUtility.IsNotAzureSynapse))]
         public static void TestUdtSchemaMetadata()
         {

tools/props/Versions.props

@@ -27,6 +27,7 @@
     <SystemBuffersVersion>4.5.1</SystemBuffersVersion>
     <SystemMemoryVersion>4.5.5</SystemMemoryVersion>
     <SystemTextEncodingsWebVersion>6.0.0</SystemTextEncodingsWebVersion>
+    <SystemDataCommonVersion>4.3.0</SystemDataCommonVersion>
   </PropertyGroup>
   <!-- NetFx and NetCore project dependencies -->
   <PropertyGroup>

tools/specs/Microsoft.Data.SqlClient.nuspec

@@ -37,6 +37,7 @@ When using NuGet 3.x this package requires at least version 3.4.</description>
         <dependency id="System.Buffers" version="4.5.1" />
         <dependency id="System.Text.Encodings.Web" version="6.0.0" />
         <dependency id="System.Text.Json" version="6.0.10" />
+        <dependency id="System.Data.Common" version="4.3.0" />
       </group>
       <group targetFramework="net8.0">
         <dependency id="Microsoft.Data.SqlClient.SNI.runtime" version="6.0.0-preview1.24226.4" exclude="Compile" />