fix(mssql, oracle): enable schema switching from Cmd+K quick switcher

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- SQL Server and Oracle connections silently ignored schema selection from the Cmd+K Quick Switcher. Picking a schema like `rpt` (or any non-default) appeared in the search list but did nothing on selection. Three things were misaligned: `QuickSwitcherViewModel` listed both engines in a hardcoded schema-fetch allowlist (so schemas appeared as searchable items), but `PluginMetadataRegistry` had `supportsSchemaSwitching: false` for both, and `MainContentCoordinator+Navigation.switchSchema` early-returned silently on that flag with no log and no user feedback. The MSSQL and Oracle plugin drivers themselves already implemented `switchSchema(to:)` correctly (MSSQL updates `_currentSchema` for table-listing filters; Oracle runs `ALTER SESSION SET CURRENT_SCHEMA`), so flipping the registry flag is sufficient. `supportsSchemaSwitching` is now `true` for both, post-connect actions include `selectSchemaFromLastSession` so a chosen schema persists across reconnects, the `QuickSwitcherViewModel` allowlist is replaced with `PluginManager.shared.supportsSchemaSwitching(for:)` so future engines auto-pick up the right behavior, and the early-return in `switchSchema` now logs and surfaces a `Schema Switching Not Supported` alert instead of failing silently. Reported in r/macapps feedback.
 - iOS: app crashed with `EXC_BREAKPOINT` "Not enough bits to represent the passed value" when opening some MySQL tables (TestFlight report on a 100k-record table). `MySQLActor.execute` did `Int(mysql_affected_rows(mysql))`, but libmariadb is documented to return `~(my_ulonglong)0` (= `UInt64.max`) as an error sentinel ("for a SELECT, mysql_affected_rows() was called prior to mysql_store_result()") and the unchecked Int conversion trapped on the sentinel. The same shape applied to per-cell `mysql_fetch_lengths` values, which on arm64 are `unsigned long` (`UInt64`); a length above `Int.max` would trap rather than fail the read recoverably. Both paths now use `Int(clamping:)` and the affected-rows sites explicitly map the `~0` sentinel to `0`. Same hardening applied to the macOS MySQL plugin's two cell-length conversion sites in `MariaDBPluginConnection.swift` (default-fetch and streaming) which had identical exposure but no reported crash.
 - iOS: connections to `.local` (Bonjour) hostnames and other local-network addresses (10.x, 192.168.x, 172.16-31.x, 169.254.x, IPv6 ULA / link-local) timed out silently. The bundle was missing `NSLocalNetworkUsageDescription` and `NSBonjourServices`, so iOS never prompted the user for Local Network access and quietly dropped every outbound `connect()` to a local-network address. Most visible variant: SSH Tunnel set to `Some-MacBook.local`, error surfaced as "MySQL connection failed: Lost connection to server at 'handshake: reading initial communication packet', system error: 60" (errno 60 = `ETIMEDOUT`). Both Info.plist keys are now declared (purpose string explains database/SSH access; Bonjour types `_ssh._tcp`, `_mysql._tcp`, `_postgresql._tcp`, `_redis._tcp`). A new `LocalNetworkPermission` actor starts an `NWBrowser` for `_ssh._tcp` the first time a connection targets a local-network host (the documented Apple pattern from the DTS "Local Network Privacy FAQ" since a bare `connect()` does not always trigger the consent prompt for `getaddrinfo`-based connections), watches the `NWBrowser.State` stream for `.ready` (granted) or `.waiting`/`.failed` (unavailable), and caches the resolution per process. On denial the gate throws `LocalNetworkPermissionError.unavailable` immediately on every subsequent attempt instead of waiting for the 10-second TCP timeout, so the error surfaces in under a second. Concurrent first-time gate calls share one in-flight resolution `Task` so a parallel SSH + DB connect does not double-prompt. Wired through `SSHTunnelFactory.create()` and `MySQLDriver` / `PostgreSQLDriver` / `RedisDriver` `connect()` (loopback-only and non-local hosts no-op the gate). `ErrorClassifier` matches the typed `LocalNetworkPermissionError` directly and falls back to detecting `ETIMEDOUT` on SSH-enabled or local-network connections; both paths show "Open Settings > Privacy & Security > Local Network and turn TablePro on, then try again." instead of the previous generic "server is not responding" or misleading SSH-handshake copy.
 - Data grid column headers now use the same 4pt horizontal inset as result cells, including the right-aligned `#` row-number header.

Plugins/MSSQLDriverPlugin/MSSQLPlugin.swift

@@ -24,7 +24,8 @@ final class MSSQLPlugin: NSObject, TableProPlugin, DriverPlugin {
 
     // MARK: - UI/Capability Metadata
 
-    static let postConnectActions: [PostConnectAction] = [.selectDatabaseFromLastSession]
+    static let supportsSchemaSwitching = true
+    static let postConnectActions: [PostConnectAction] = [.selectDatabaseFromLastSession, .selectSchemaFromLastSession]
     static let brandColorHex = "#E34517"
     static let systemDatabaseNames: [String] = ["master", "tempdb", "model", "msdb"]
     static let defaultSchemaName = "dbo"

Plugins/OracleDriverPlugin/OraclePlugin.swift

@@ -26,6 +26,8 @@ final class OraclePlugin: NSObject, TableProPlugin, DriverPlugin, PluginDiagnost
     static let isDownloadable = true
     static let pathFieldRole: PathFieldRole = .serviceName
     static let supportsForeignKeyDisable = false
+    static let supportsSchemaSwitching = true
+    static let postConnectActions: [PostConnectAction] = [.selectSchemaFromLastSession]
     static let brandColorHex = "#C3160B"
     static let systemDatabaseNames: [String] = ["SYS", "SYSTEM", "OUTLN", "DBSNMP", "APPQOSSYS", "WMSYS", "XDB"]
     static let databaseGroupingStrategy: GroupingStrategy = .bySchema

TablePro/Core/Plugins/PluginMetadataRegistry+RegistryDefaults.swift

@@ -647,13 +647,13 @@ extension PluginMetadataRegistry {
                 isDownloadable: true, primaryUrlScheme: "sqlserver", parameterStyle: .questionMark,
                 navigationModel: .standard, explainVariants: [], pathFieldRole: .database,
                 supportsHealthMonitor: true, urlSchemes: ["sqlserver", "mssql"],
-                postConnectActions: [.selectDatabaseFromLastSession],
+                postConnectActions: [.selectDatabaseFromLastSession, .selectSchemaFromLastSession],
                 brandColorHex: "#E34517",
                 queryLanguageName: "SQL", editorLanguage: .sql,
                 connectionMode: .network, supportsDatabaseSwitching: true,
                 supportsColumnReorder: false,
                 capabilities: PluginMetadataSnapshot.CapabilityFlags(
-                    supportsSchemaSwitching: false,
+                    supportsSchemaSwitching: true,
                     supportsImport: true,
                     supportsExport: true,
                     supportsSSH: true,
@@ -698,13 +698,14 @@ extension PluginMetadataRegistry {
                 requiresAuthentication: true, supportsForeignKeys: true, supportsSchemaEditing: true,
                 isDownloadable: true, primaryUrlScheme: "oracle", parameterStyle: .questionMark,
                 navigationModel: .standard, explainVariants: [], pathFieldRole: .serviceName,
-                supportsHealthMonitor: true, urlSchemes: ["oracle"], postConnectActions: [],
+                supportsHealthMonitor: true, urlSchemes: ["oracle"],
+                postConnectActions: [.selectSchemaFromLastSession],
                 brandColorHex: "#C3160B",
                 queryLanguageName: "SQL", editorLanguage: .sql,
                 connectionMode: .network, supportsDatabaseSwitching: true,
                 supportsColumnReorder: false,
                 capabilities: PluginMetadataSnapshot.CapabilityFlags(
-                    supportsSchemaSwitching: false,
+                    supportsSchemaSwitching: true,
                     supportsImport: true,
                     supportsExport: true,
                     supportsSSH: true,

TablePro/ViewModels/QuickSwitcherViewModel.swift

@@ -86,9 +86,7 @@ internal final class QuickSwitcherViewModel {
                 Self.logger.warning("Failed to fetch databases for quick switcher: \(error.localizedDescription, privacy: .public)")
             }
 
-            // Schemas (only for databases that support them)
-            let supportsSchemas = [DatabaseType.postgresql, .redshift, .oracle, .mssql]
-            if supportsSchemas.contains(databaseType) {
+            if PluginManager.shared.supportsSchemaSwitching(for: databaseType) {
                 do {
                     let schemas = try await driver.fetchSchemas()
                     for schema in schemas {

TablePro/Views/Main/Extensions/MainContentCoordinator+Navigation.swift

@@ -428,9 +428,21 @@ extension MainContentCoordinator {
         }
     }
 
-    /// Switch to a different PostgreSQL schema (used for URL-based schema selection)
     func switchSchema(to schema: String) async {
-        guard PluginManager.shared.supportsSchemaSwitching(for: connection.type) else { return }
+        guard PluginManager.shared.supportsSchemaSwitching(for: connection.type) else {
+            navigationLogger.warning(
+                "switchSchema(to: \(schema, privacy: .public)) ignored: \(connection.type.rawValue, privacy: .public) does not support schema switching"
+            )
+            AlertHelper.showErrorSheet(
+                title: String(localized: "Schema Switching Not Supported"),
+                message: String(
+                    format: String(localized: "%@ does not support switching schemas in TablePro."),
+                    connection.type.rawValue
+                ),
+                window: contentWindow
+            )
+            return
+        }
 
         clearFilterState()
         let previousSchema = toolbarState.databaseName

TableProTests/Core/Plugins/PluginMetadataRegistrySchemaSwitchingTests.swift

@@ -0,0 +1,114 @@
+//
+//  PluginMetadataRegistrySchemaSwitchingTests.swift
+//  TableProTests
+//
+
+import Foundation
+@testable import TablePro
+import TableProPluginKit
+import Testing
+
+@MainActor
+@Suite("PluginMetadataRegistry schema switching")
+struct PluginMetadataRegistrySchemaSwitchingTests {
+    private func snapshot(forTypeId typeId: String) -> PluginMetadataSnapshot? {
+        PluginMetadataRegistry.shared.snapshot(forTypeId: typeId)
+    }
+
+    // MARK: - SQL Server
+
+    @Test("SQL Server supports schema switching")
+    func sqlServerSupportsSchemaSwitching() {
+        guard let snap = snapshot(forTypeId: "SQL Server") else {
+            Issue.record("Registry default for SQL Server missing")
+            return
+        }
+        #expect(snap.capabilities.supportsSchemaSwitching == true)
+    }
+
+    @Test("SQL Server post-connect actions restore last schema")
+    func sqlServerRestoresLastSchema() {
+        guard let snap = snapshot(forTypeId: "SQL Server") else {
+            Issue.record("Registry default for SQL Server missing")
+            return
+        }
+        #expect(snap.postConnectActions.contains(.selectSchemaFromLastSession))
+    }
+
+    @Test("SQL Server post-connect actions still restore last database")
+    func sqlServerRestoresLastDatabase() {
+        guard let snap = snapshot(forTypeId: "SQL Server") else {
+            Issue.record("Registry default for SQL Server missing")
+            return
+        }
+        #expect(snap.postConnectActions.contains(.selectDatabaseFromLastSession))
+    }
+
+    // MARK: - Oracle
+
+    @Test("Oracle supports schema switching")
+    func oracleSupportsSchemaSwitching() {
+        guard let snap = snapshot(forTypeId: "Oracle") else {
+            Issue.record("Registry default for Oracle missing")
+            return
+        }
+        #expect(snap.capabilities.supportsSchemaSwitching == true)
+    }
+
+    @Test("Oracle post-connect actions restore last schema")
+    func oracleRestoresLastSchema() {
+        guard let snap = snapshot(forTypeId: "Oracle") else {
+            Issue.record("Registry default for Oracle missing")
+            return
+        }
+        #expect(snap.postConnectActions.contains(.selectSchemaFromLastSession))
+    }
+
+    // MARK: - PostgreSQL (regression for the working reference)
+
+    @Test("PostgreSQL supports schema switching")
+    func postgreSQLSupportsSchemaSwitching() {
+        guard let snap = snapshot(forTypeId: "PostgreSQL") else {
+            Issue.record("Registry default for PostgreSQL missing")
+            return
+        }
+        #expect(snap.capabilities.supportsSchemaSwitching == true)
+    }
+
+    // MARK: - Negative cases (engines without schemas)
+
+    @Test("MySQL does not support schema switching")
+    func mysqlDoesNotSupportSchemaSwitching() {
+        guard let snap = snapshot(forTypeId: "MySQL") else {
+            Issue.record("Registry default for MySQL missing")
+            return
+        }
+        #expect(snap.capabilities.supportsSchemaSwitching == false)
+    }
+
+    @Test("SQLite does not support schema switching")
+    func sqliteDoesNotSupportSchemaSwitching() {
+        guard let snap = snapshot(forTypeId: "SQLite") else {
+            Issue.record("Registry default for SQLite missing")
+            return
+        }
+        #expect(snap.capabilities.supportsSchemaSwitching == false)
+    }
+
+    // MARK: - Cross-component consistency
+
+    @Test("Quick Switcher allowlist agrees with registry capability flag")
+    func quickSwitcherAllowlistMatchesRegistry() {
+        let typesThatShouldSupportSchemas = ["PostgreSQL", "Redshift", "Oracle", "SQL Server"]
+        for typeId in typesThatShouldSupportSchemas {
+            guard let snap = snapshot(forTypeId: typeId) else {
+                Issue.record("Registry default for \(typeId) missing")
+                continue
+            }
+            #expect(
+                snap.capabilities.supportsSchemaSwitching == true,
+                "\(typeId) is in the documented schema-aware engine set but registry has supportsSchemaSwitching = false"
+            )
+        }
+    }
+}