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SSMS Object Explorer's Views and Programmability folders now enumerate: the views catalog gains principal_id / create_date / modify_date / is_ms_shipped / ledger_view_type and the objects family gains principal_id; sequences gain create_date / modify_date / principal_id; sys.types gains max_length / precision / scale; new catalog surface sys.database_files, sys.plan_guides, sys.assembly_types; xp_instance_regread modeled alongside xp_msver.
1 parent 9f71784 commit bb471ea

10 files changed

Lines changed: 587 additions & 6 deletions

‎SqlServerSimulator.Tests/SsmsProgrammabilityNodeCatalogTests.cs‎

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using static Microsoft.VisualStudio.TestTools.UnitTesting.Assert;
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namespace SqlServerSimulator;
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/// <summary>
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/// Tests for the catalog surface SSMS Object Explorer's Views and
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/// Programmability nodes read via SMO: <c>sys.all_views</c> (create_date /
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/// principal_id / is_ms_shipped / ledger_view_type), the <c>principal_id</c>
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/// column SMO's function / procedure enumeration reads off
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/// <c>sys.all_objects</c>, <c>sys.sequences</c> (create_date / principal_id —
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/// the missing columns that left the Sequences node empty),
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/// <c>sys.types.max_length</c> / precision / scale (User-Defined Data Types
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/// node), <c>sys.assembly_types</c> (the three CLR system types), the empty
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/// <c>sys.plan_guides</c> view, and <c>sys.database_files</c> (current-database
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/// projection of <c>sys.master_files</c>, cross-database resolvable). Shapes /
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/// values probed against SQL Server 2025 (2026-07-15).
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/// </summary>
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[TestClass]
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public sealed class SsmsProgrammabilityNodeCatalogTests
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{
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[TestMethod]
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public void AllViews_ExposesCreateDateNotNull()
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{
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var sim = new Simulation();
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sim.ExecuteBatches("create view v as select 1 as c");
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AreEqual(1, sim.ExecuteScalar<int>(
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"select count(*) from sys.all_views where name = 'v' and create_date is not null and modify_date is not null"));
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}
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[TestMethod]
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public void AllViews_PrincipalIdIsNull()
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{
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var sim = new Simulation();
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sim.ExecuteBatches("create view v as select 1 as c");
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AreEqual(1, sim.ExecuteScalar<int>("select count(*) from sys.all_views where name = 'v' and principal_id is null"));
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}
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[TestMethod]
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public void AllViews_IsMsShippedAndLedgerViewTypeAreZero()
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{
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var sim = new Simulation();
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sim.ExecuteBatches("create view v as select 1 as c");
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AreEqual(0, sim.ExecuteScalar<int>("select cast(is_ms_shipped as int) from sys.all_views where name = 'v'"));
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AreEqual(0, sim.ExecuteScalar<int>("select cast(ledger_view_type as int) from sys.all_views where name = 'v'"));
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}
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[TestMethod]
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public void AllObjects_ExposesPrincipalId_NullForUserFunction()
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{
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var sim = new Simulation();
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sim.ExecuteBatches("create function dbo.f(@x int) returns int as begin return @x + 1 end");
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AreEqual(1, sim.ExecuteScalar<int>(
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"select count(*) from sys.all_objects where name = 'f' and type = 'FN' and principal_id is null"));
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}
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[TestMethod]
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public void Objects_ExposesPrincipalId_NullForUserProcedure()
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{
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var sim = new Simulation();
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sim.ExecuteBatches("create procedure dbo.p as select 1");
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AreEqual(1, sim.ExecuteScalar<int>(
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"select count(*) from sys.objects where name = 'p' and type = 'P' and principal_id is null"));
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}
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[TestMethod]
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public void Sequences_ExposeCreateDateAndPrincipalId()
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{
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var sim = new Simulation();
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_ = sim.ExecuteNonQuery("create sequence dbo.s as int start with 1 increment by 1");
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AreEqual(1, sim.ExecuteScalar<int>(
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"select count(*) from sys.sequences where name = 's' and create_date is not null and principal_id is null"));
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}
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[TestMethod]
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public void Types_ScalarAliasReportsUnderlyingByteWidth()
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{
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var sim = new Simulation();
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_ = sim.ExecuteNonQuery("create type dbo.MyStr from nvarchar(50)");
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// nvarchar(50) byte width is 100; SMO halves it for the display Length.
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AreEqual(100, sim.ExecuteScalar<int>("select cast(max_length as int) from sys.types where name = 'MyStr'"));
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}
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[TestMethod]
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public void Types_ScalarAliasReportsPrecisionAndScale()
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{
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var sim = new Simulation();
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_ = sim.ExecuteNonQuery("create type dbo.Amt from decimal(10, 2)");
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AreEqual(9, sim.ExecuteScalar<int>("select cast(max_length as int) from sys.types where name = 'Amt'"));
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AreEqual(10, sim.ExecuteScalar<int>("select cast(precision as int) from sys.types where name = 'Amt'"));
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AreEqual(2, sim.ExecuteScalar<int>("select cast(scale as int) from sys.types where name = 'Amt'"));
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}
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[TestMethod]
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public void Types_SystemTypeMaxLengthMatchesSystypes()
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{
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var sim = new Simulation();
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AreEqual(4, sim.ExecuteScalar<int>("select cast(max_length as int) from sys.types where name = 'int'"));
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AreEqual(8000, sim.ExecuteScalar<int>("select cast(max_length as int) from sys.types where name = 'nvarchar'"));
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AreEqual(8016, sim.ExecuteScalar<int>("select cast(max_length as int) from sys.types where name = 'sql_variant'"));
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}
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[TestMethod]
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public void AssemblyTypes_ProjectsThreeClrSystemTypes()
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=> AreEqual(3, new Simulation().ExecuteScalar<int>("select count(*) from sys.assembly_types"));
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[TestMethod]
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public void AssemblyTypes_HierarchyidShape()
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{
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var sim = new Simulation();
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AreEqual(892, sim.ExecuteScalar<int>("select cast(max_length as int) from sys.assembly_types where name = 'hierarchyid'"));
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AreEqual(240, sim.ExecuteScalar<int>("select cast(system_type_id as int) from sys.assembly_types where name = 'hierarchyid'"));
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AreEqual(128, sim.ExecuteScalar<int>("select user_type_id from sys.assembly_types where name = 'hierarchyid'"));
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AreEqual(4, sim.ExecuteScalar<int>("select schema_id from sys.assembly_types where name = 'hierarchyid'"));
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AreEqual(1, sim.ExecuteScalar<int>("select assembly_id from sys.assembly_types where name = 'hierarchyid'"));
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AreEqual(1, sim.ExecuteScalar<int>("select cast(is_assembly_type as int) from sys.assembly_types where name = 'hierarchyid'"));
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AreEqual(0, sim.ExecuteScalar<int>("select cast(is_user_defined as int) from sys.assembly_types where name = 'hierarchyid'"));
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}
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[TestMethod]
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public void AssemblyTypes_SpatialTypesReportMaxLengthMinusOne()
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{
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var sim = new Simulation();
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AreEqual(-1, sim.ExecuteScalar<int>("select cast(max_length as int) from sys.assembly_types where name = 'geometry'"));
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AreEqual(-1, sim.ExecuteScalar<int>("select cast(max_length as int) from sys.assembly_types where name = 'geography'"));
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}
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/// <summary>
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/// SMO's User-Defined Types node filters is_user_defined = 1; the three
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/// system CLR types all report 0, so the node lists nothing (matching a
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/// WWI database with no user CLR types).
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/// </summary>
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[TestMethod]
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public void AssemblyTypes_UserDefinedFilterReturnsEmpty()
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=> AreEqual(0, new Simulation().ExecuteScalar<int>("select count(*) from sys.assembly_types where is_user_defined = 1"));
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[TestMethod]
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public void PlanGuides_IsEmpty()
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=> AreEqual(0, new Simulation().ExecuteScalar<int>("select count(*) from sys.plan_guides"));
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[TestMethod]
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public void PlanGuides_ExposesNameAndIsDisabled()
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{
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using var reader = new Simulation().ExecuteReader("select name, is_disabled from sys.plan_guides");
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AreEqual(2, reader.FieldCount);
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AreEqual("name", reader.GetName(0));
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AreEqual("is_disabled", reader.GetName(1));
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IsFalse(reader.Read());
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}
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[TestMethod]
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public void DatabaseFiles_ReturnsDataAndLogRow()
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{
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var sim = new Simulation();
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AreEqual(2, sim.ExecuteScalar<int>("select count(*) from sys.database_files"));
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AreEqual(0, sim.ExecuteScalar<int>("select cast(type as int) from sys.database_files where file_id = 1"));
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AreEqual(1, sim.ExecuteScalar<int>("select cast(type as int) from sys.database_files where file_id = 2"));
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}
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[TestMethod]
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public void DatabaseFiles_AgreesWithMasterFilesOnName()
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{
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var sim = new Simulation();
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var fromDatabaseFiles = (string?)sim.ExecuteScalar("select name from sys.database_files where file_id = 1");
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var fromMasterFiles = (string?)sim.ExecuteScalar(
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"select name from sys.master_files where database_id = db_id() and file_id = 1");
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AreEqual(fromMasterFiles, fromDatabaseFiles);
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IsTrue(fromDatabaseFiles!.EndsWith("_Data", StringComparison.Ordinal));
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}
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[TestMethod]
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public void DatabaseFiles_ResolvesCrossDatabaseThroughMaster()
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{
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var sim = new Simulation();
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AreEqual(2, sim.ExecuteScalar<int>("select count(*) from master.sys.database_files"));
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AreEqual("master_Data", (string?)sim.ExecuteScalar("select name from master.sys.database_files where file_id = 1"));
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AreEqual("master_Log", (string?)sim.ExecuteScalar("select name from master.sys.database_files where file_id = 2"));
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}
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[TestMethod]
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public void ViewsNode_TrimmedSmoQuery_ReturnsCreatedView()
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{
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var sim = new Simulation();
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sim.ExecuteBatches("create view dbo.v as select 1 as c");
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using var reader = sim.ExecuteReader("""
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select v.name, schema_name(v.schema_id) as [Schema], v.create_date,
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cast(isnull(v.ledger_view_type, 0) as tinyint) as ledger
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from sys.all_views as v
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left outer join sys.database_principals as sv
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on sv.principal_id = isnull(v.principal_id, objectproperty(v.object_id, 'OwnerId'))
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where v.type = N'V' and cast(v.is_ms_shipped as bit) = 0
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order by [Schema] asc, v.name asc
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""");
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IsTrue(reader.Read());
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AreEqual("v", reader.GetString(0));
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AreEqual("dbo", reader.GetString(1));
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IsFalse(reader.Read());
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}
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}

‎SqlServerSimulator.Tests/XpInstanceRegreadTests.cs‎

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using static Microsoft.VisualStudio.TestTools.UnitTesting.Assert;
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namespace SqlServerSimulator;
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/// <summary>
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/// Tests for the <c>xp_instance_regread</c> system procedure. SSMS reads the
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/// instance <c>SQLPath</c> registry value on connect (via
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/// <c>master.dbo.xp_instance_regread ... N'SQLPath', @out OUTPUT</c>) to derive
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/// the SMO RootDirectory. The simulator returns a synthetic instance path
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/// rooted at <c>/var/opt/mssql</c> (consistent with the physical paths surfaced
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/// by <c>sys.master_files</c> / <c>sys.database_files</c>); values are
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/// machine-specific on a real server. The OUTPUT form writes into the caller's
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/// variable and yields no result set; the no-OUTPUT form returns a
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/// <c>(Value, Data)</c> result set (probe-confirmed against SQL Server 2025).
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/// </summary>
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[TestClass]
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public sealed class XpInstanceRegreadTests
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{
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[TestMethod]
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public void SqlPath_OutputForm_ReturnsSyntheticInstanceRoot()
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=> AreEqual("/var/opt/mssql", new Simulation().ExecuteScalar("""
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declare @v nvarchar(512);
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exec master.dbo.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'SOFTWARE\Microsoft\MSSQLServer\Setup', N'SQLPath', @v OUTPUT;
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select @v
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"""));
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[TestMethod]
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public void UnknownValueName_OutputForm_YieldsNull()
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=> AreEqual(1, new Simulation().ExecuteScalar<int>("""
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declare @v nvarchar(512);
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exec master.dbo.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'SOFTWARE\Microsoft\MSSQLServer\Setup', N'DoesNotExist', @v OUTPUT;
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select case when @v is null then 1 else 0 end
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"""));
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[TestMethod]
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public void NoOutputParameter_ReturnsValueDataResultSet()
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{
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using var reader = new Simulation().ExecuteReader(
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@"exec master.dbo.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'SOFTWARE\Microsoft\MSSQLServer\Setup', N'SQLPath'");
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AreEqual(2, reader.FieldCount);
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AreEqual("Value", reader.GetName(0));
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AreEqual("Data", reader.GetName(1));
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IsTrue(reader.Read());
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AreEqual("SQLPath", reader.GetString(0));
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AreEqual("/var/opt/mssql", reader.GetString(1));
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IsFalse(reader.Read());
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}
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[TestMethod]
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public void CallableWithoutMasterDboQualifier()
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=> AreEqual("/var/opt/mssql", new Simulation().ExecuteScalar("""
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declare @v nvarchar(512);
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exec xp_instance_regread N'HKEY_LOCAL_MACHINE', N'SOFTWARE\Microsoft\MSSQLServer\Setup', N'SQLPath', @v OUTPUT;
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select @v
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"""));
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}

‎SqlServerSimulator/BuiltInResources.CoreObjects.cs‎

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@@ -171,6 +171,12 @@ void Sys(string name, HeapColumn[] columns, Func<Parser.BatchContext, Database,
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new("name", SqlType.SystemName, 128, true),
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new("schema_id", SqlType.Int32, null, false),
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new("parent_object_id", SqlType.Int32, null, false),
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// No explicit object owner is modeled (ownership follows the
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// schema), so principal_id is always NULL — matching real SQL
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// Server for objects without an AUTHORIZATION override. SMO's
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// Object-Explorer function / procedure / sequence enumeration
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// reads ISNULL(o.principal_id, OBJECTPROPERTY(o.object_id,'OwnerId')).
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new("principal_id", SqlType.Int32, null, true),
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new("type", charTwo, 2, true),
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new("type_desc", nvarchar60Catalog, 60, true),
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new("create_date", SqlType.DateTime, null, false),
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new("name", SqlType.SystemName, 128, true),
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new("schema_id", SqlType.Int32, null, false),
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new("parent_object_id", SqlType.Int32, null, false),
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new("principal_id", SqlType.Int32, null, true),
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new("type", charTwo, 2, true),
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new("type_desc", nvarchar60Catalog, 60, true),
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new("create_date", SqlType.DateTime, null, false),
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SqlValue zeroParent, SqlValue notMsShipped)
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{
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_ = batch;
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var nullPrincipal = SqlValue.Null(SqlType.Int32);
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foreach (var schema in database.Schemas.Values)
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{
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// Schema-resident objects in ObjectId order. SchemaObject's
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SqlValue.FromSystemName(obj.Name),
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SqlValue.FromInt32(obj.SchemaId),
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parent,
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nullPrincipal,
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SqlValue.FromChar(charTwo, obj.ObjectTypeCode),
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SqlValue.FromNVarchar(obj.ObjectTypeDescription),
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SqlValue.FromDateTime(obj.CreateDate),
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SqlValue.FromSystemName(key.Name),
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schemaIdValue,
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tableObjectId,
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nullPrincipal,
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key.Kind == KeyConstraintKind.PrimaryKey ? pkType : uqType,
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key.Kind == KeyConstraintKind.PrimaryKey ? pkTypeDesc : uqTypeDesc,
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createDate,
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SqlValue.FromSystemName(chk.Name),
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schemaIdValue,
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tableObjectId,
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nullPrincipal,
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checkType,
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checkTypeDesc,
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createDate,
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SqlValue.FromSystemName(fk.Name),
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schemaIdValue,
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tableObjectId,
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nullPrincipal,
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SqlValue.FromChar(charTwo, "F "),
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SqlValue.FromNVarchar("FOREIGN_KEY_CONSTRAINT"),
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createDate,

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