feat: add support for Microsoft SQL Server (MSSQL) in backup and restore functionality

README.md

@@ -6,7 +6,7 @@ A self-hosted database backup management tool. Schedule automated backups, monit
 
 ## Features
 
-- Multiple database support (PostgreSQL, MySQL, MongoDB, Redis)
+- Multiple database support (PostgreSQL, MySQL, MSSQL, MongoDB, Redis)
 - Automated scheduling with cron syntax
 - S3-compatible storage integration
 - Built-in backup comparison and diff viewer

apps/api/Dockerfile

@@ -18,7 +18,19 @@ RUN apk add --no-cache \
     postgresql-client \
     mysql-client \
     mongodb-tools \
-    redis
+    redis \
+    freetds
+
+# Install Microsoft SQL Server Tools
+RUN apk add --no-cache curl gnupg && \
+    curl -O https://download.microsoft.com/download/b/9/f/b9f3cce4-3925-46d4-9f46-da08869c6486/msodbcsql18_18.1.1.1-1_amd64.apk && \
+    curl -O https://download.microsoft.com/download/b/9/f/b9f3cce4-3925-46d4-9f46-da08869c6486/mssql-tools18_18.1.1.1-1_amd64.apk && \
+    apk add --allow-untrusted msodbcsql18_18.1.1.1-1_amd64.apk && \
+    apk add --allow-untrusted mssql-tools18_18.1.1.1-1_amd64.apk && \
+    rm -f msodbcsql18_18.1.1.1-1_amd64.apk mssql-tools18_18.1.1.1-1_amd64.apk && \
+    apk del curl gnupg
+
+ENV PATH="${PATH}:/opt/mssql-tools18/bin"
 
 WORKDIR /app
 

apps/api/go.mod

@@ -15,10 +15,13 @@ require (
 
 require (
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/denisenkom/go-mssqldb v0.12.3 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/go-ini/ini v1.67.0 // indirect
 	github.com/goccy/go-json v0.10.5 // indirect
+	github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe // indirect
+	github.com/golang-sql/sqlexp v0.1.0 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.11 // indirect
 	github.com/minio/crc64nvme v1.0.2 // indirect
 	github.com/minio/md5-simd v1.1.2 // indirect

apps/api/go.sum

@@ -1,11 +1,18 @@
 filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
 filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
+github.com/Azure/azure-sdk-for-go/sdk/azcore v0.19.0/go.mod h1:h6H6c8enJmmocHUbLiiGY6sx7f9i+X3m1CHdd5c6Rdw=
+github.com/Azure/azure-sdk-for-go/sdk/azidentity v0.11.0/go.mod h1:HcM1YX14R7CJcghJGOYCgdezslRSVzqwLf/q+4Y2r/0=
+github.com/Azure/azure-sdk-for-go/sdk/internal v0.7.0/go.mod h1:yqy467j36fJxcRV2TzfVZ1pCb5vxm4BtZPUdYWe/Xo8=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/denisenkom/go-mssqldb v0.12.3 h1:pBSGx9Tq67pBOTLmxNuirNTeB8Vjmf886Kx+8Y+8shw=
+github.com/denisenkom/go-mssqldb v0.12.3/go.mod h1:k0mtMFOnU+AihqFxPMiF05rtiDrorD1Vrm1KEz5hxDo=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
+github.com/dnaeon/go-vcr v1.2.0/go.mod h1:R4UdLID7HZT3taECzJs4YgbbH6PIGXB6W/sc5OLb6RQ=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/go-ini/ini v1.67.0 h1:z6ZrTEZqSWOTyH2FlglNbNgARyHG8oLW9gMELqKr06A=
@@ -16,6 +23,10 @@ github.com/goccy/go-json v0.10.5 h1:Fq85nIqj+gXn/S5ahsiTlK3TmC85qgirsdTP/+DeaC4=
 github.com/goccy/go-json v0.10.5/go.mod h1:oq7eo15ShAhp70Anwd5lgX2pLfOS3QCiwU/PULtXL6M=
 github.com/golang-jwt/jwt/v5 v5.3.0 h1:pv4AsKCKKZuqlgs5sUmn4x8UlGa0kEVt/puTpKx9vvo=
 github.com/golang-jwt/jwt/v5 v5.3.0/go.mod h1:fxCRLWMO43lRc8nhHWY6LGqRcf+1gQWArsqaEUEa5bE=
+github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe h1:lXe2qZdvpiX5WZkZR4hgp4KJVfY3nMkvmwbVkpv1rVY=
+github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe/go.mod h1:8vg3r2VgvsThLBIFL93Qb5yWzgyZWhEmBwUJWevAkK0=
+github.com/golang-sql/sqlexp v0.1.0 h1:ZCD6MBpcuOVfGVqsEmY5/4FtYiKz6tSyUv9LPEDei6A=
+github.com/golang-sql/sqlexp v0.1.0/go.mod h1:J4ad9Vo8ZCWQ2GMrC4UCQy1JpCbwU9m3EOqtpKwwwHI=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/golang/snappy v0.0.4 h1:yAGX7huGHXlcLOEtBnF4w7FQwA26wojNCwOYAEhLjQM=
 github.com/golang/snappy v0.0.4/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
@@ -44,10 +55,12 @@ github.com/minio/md5-simd v1.1.2 h1:Gdi1DZK69+ZVMoNHRXJyNcxrMA4dSxoYHZSQbirFg34=
 github.com/minio/md5-simd v1.1.2/go.mod h1:MzdKDxYpY2BT9XQFocsiZf/NKVtR7nkE4RoEpN+20RM=
 github.com/minio/minio-go/v7 v7.0.95 h1:ywOUPg+PebTMTzn9VDsoFJy32ZuARN9zhB+K3IYEvYU=
 github.com/minio/minio-go/v7 v7.0.95/go.mod h1:wOOX3uxS334vImCNRVyIDdXX9OsXDm89ToynKgqUKlo=
+github.com/modocache/gover v0.0.0-20171022184752-b58185e213c5/go.mod h1:caMODM3PzxT8aQXRPkAt8xlV/e7d7w8GM5g0fa5F0D8=
 github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe h1:iruDEfMl2E6fbMZ9s0scYfZQ84/6SPL6zC8ACM2oIL0=
 github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe/go.mod h1:wL8QJuTMNUDYhXwkmfOly8iTdp5TEcJFWZD2D7SIkUc=
 github.com/philhofer/fwd v1.2.0 h1:e6DnBTl7vGY+Gz322/ASL4Gyp1FspeMvx1RNDoToZuM=
 github.com/philhofer/fwd v1.2.0/go.mod h1:RqIHx9QI14HlwKwm98g9Re5prTQ6LdeRQn+gXJFxsJM=
+github.com/pkg/browser v0.0.0-20180916011732-0a3d74bf9ce4/go.mod h1:4OwLy04Bl9Ef3GJJCoec+30X3LQs/0/m4HFRt/2LUSA=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
@@ -60,6 +73,8 @@ github.com/robfig/cron/v3 v3.0.0 h1:kQ6Cb7aHOHTSzNVNEhmp8EcWKLb4CbiMW9h9VyIhO4E=
 github.com/robfig/cron/v3 v3.0.0/go.mod h1:eQICP3HwyT7UooqI/z+Ov+PtYAWygg1TEWWzGIFLtro=
 github.com/rs/xid v1.6.0 h1:fV591PaemRlL6JfRxGDEPl69wICngIQ3shQtzfy2gxU=
 github.com/rs/xid v1.6.0/go.mod h1:7XoLgs4eV+QndskICGsho+ADou8ySMSjJKDIan90Nz0=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/tinylib/msgp v1.3.0 h1:ULuf7GPooDaIlbyvgAxBV/FI7ynli6LZ1/nVUNu+0ww=
@@ -77,13 +92,16 @@ github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5t
 go.mongodb.org/mongo-driver v1.12.1 h1:nLkghSU8fQNaK7oUmDhQFsnrtcoNy7Z6LVFKsEecqgE=
 go.mongodb.org/mongo-driver v1.12.1/go.mod h1:/rGBTebI3XYboVmgz+Wv3Bcbl3aD0QF9zl6kDDw18rQ=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20201016220609-9e8e0b390897/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/crypto v0.42.0 h1:chiH31gIWm57EkTXpwnqf8qeuMUi0yekh6mT2AvFlqI=
 golang.org/x/crypto v0.42.0/go.mod h1:4+rDnOTJhQCx2q7/j6rAN5XDw8kPjeaXEUR2eL94ix8=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20210610132358-84b48f89b13b/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
 golang.org/x/net v0.43.0 h1:lat02VYK2j4aLzMzecihNvTlJNQUq316m2Mr9rnM6YE=
@@ -93,6 +111,7 @@ golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.17.0 h1:l60nONMj9l5drqw6jlhIELNv9I0A4OFgRsG9k2oT9Ug=
 golang.org/x/sync v0.17.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -118,5 +137,9 @@ golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

apps/api/internal/backup/backup_cmd.go

@@ -16,6 +16,7 @@ var requiredTools = map[string]string{
 	"mariadb":    "mysqldump",
 	"mongodb":    "mongodump",
 	"redis":      "redis-cli",
+	"mssql":      "sqlcmd",
 }
 
 func (s *BackupService) verifyBackupTools(dbType string) error {
@@ -159,3 +160,40 @@ func (s *BackupService) createRedisDumpCmd(conn *connection.StoredConnection, ou
 
 	return exec.Command(binPath, args...)
 }
+
+func (s *BackupService) createMSSQLDumpCmd(conn *connection.StoredConnection, outputPath string) *exec.Cmd {
+	binaryPath := s.findDatabaseBinaryPath("mssql")
+	if binaryPath == "" {
+		fmt.Printf("ERROR: sqlcmd binary not found. Please install SQL Server command-line tools.\n")
+		return nil
+	}
+
+	binPath := filepath.Join(binaryPath, common.GetPlatformExecutableName(requiredTools["mssql"]))
+
+	scriptPath := outputPath + ".sql"
+	backupScript := fmt.Sprintf(`
+BACKUP DATABASE [%s]
+TO DISK = N'%s'
+WITH FORMAT, COMPRESSION, STATS = 10;
+GO
+`, conn.DatabaseName, outputPath)
+
+	if err := os.WriteFile(scriptPath, []byte(backupScript), 0644); err != nil {
+		fmt.Printf("ERROR: Failed to create backup script: %v\n", err)
+		return nil
+	}
+
+	args := []string{
+		"-S", fmt.Sprintf("%s,%d", conn.Host, conn.Port),
+		"-U", conn.Username,
+		"-P", conn.Password,
+		"-d", "master",
+		"-i", scriptPath,
+	}
+
+	if conn.SSL {
+		args = append(args, "-N")
+	}
+
+	return exec.Command(binPath, args...)
+}

apps/api/internal/backup/backup_restore.go

@@ -21,6 +21,7 @@ var restoreTools = map[string]string{
 	"mysql":      "mysql",
 	"mariadb":    "mysql",
 	"mongodb":    "mongorestore",
+	"mssql":      "sqlcmd",
 }
 
 // RestoreBackup restores a backup to a target database connection
@@ -61,6 +62,8 @@ func (s *BackupService) RestoreBackup(backupID string, connectionID string) erro
 		cmd = s.createMySQLRestoreCmd(conn, backup.Path)
 	case "mongodb":
 		cmd = s.createMongoRestoreCmd(conn, backup.Path)
+	case "mssql":
+		cmd = s.createMSSQLRestoreCmd(conn, backup.Path)
 	default:
 		return fmt.Errorf("unsupported database type for restore: %s", conn.Type)
 	}
@@ -81,6 +84,8 @@ func (s *BackupService) validateRestoreOutput(dbType, dbName string, output []by
 		return s.validateMySQLRestore(dbName, output, cmdErr)
 	case "mongodb":
 		return s.validateMongoDBRestore(dbName, output, cmdErr)
+	case "mssql":
+		return s.validateMSSQLRestore(dbName, output, cmdErr)
 	default:
 		return fmt.Errorf("unsupported database type: %s", dbType)
 	}
@@ -136,6 +141,28 @@ func (s *BackupService) validateMongoDBRestore(dbName string, output []byte, cmd
 	return nil
 }
 
+func (s *BackupService) validateMSSQLRestore(dbName string, output []byte, cmdErr error) error {
+	outputStr := string(output)
+
+	if strings.Contains(outputStr, "Msg") && strings.Contains(outputStr, "Level 16") {
+		return fmt.Errorf("MSSQL restore failed with error: %s", outputStr)
+	}
+
+	if cmdErr != nil {
+		return fmt.Errorf("MSSQL restore command failed: %v, output: %s", cmdErr, outputStr)
+	}
+
+	if strings.Contains(outputStr, "RESTORE DATABASE successfully processed") {
+		return nil
+	}
+
+	if cmdErr != nil {
+		return fmt.Errorf("MSSQL restore may have failed: %s", outputStr)
+	}
+
+	return nil
+}
+
 func isCriticalPostgreSQLError(line string) bool {
 	nonCriticalPatterns := []string{
 		"WARNING:",
@@ -246,3 +273,46 @@ func (s *BackupService) createMongoRestoreCmd(conn *connection.StoredConnection,
 
 	return exec.Command(binPath, args...)
 }
+
+func (s *BackupService) createMSSQLRestoreCmd(conn *connection.StoredConnection, backupPath string) *exec.Cmd {
+	binaryPath := s.findDatabaseRestorePath("mssql")
+	if binaryPath == "" {
+		fmt.Printf("ERROR: sqlcmd binary not found. Please install SQL Server command-line tools.\n")
+		return nil
+	}
+
+	binPath := filepath.Join(binaryPath, common.GetPlatformExecutableName(restoreTools["mssql"]))
+
+	scriptPath := backupPath + "_restore.sql"
+	restoreScript := fmt.Sprintf(`
+USE master;
+GO
+ALTER DATABASE [%s] SET SINGLE_USER WITH ROLLBACK IMMEDIATE;
+GO
+RESTORE DATABASE [%s]
+FROM DISK = N'%s'
+WITH REPLACE, STATS = 10;
+GO
+ALTER DATABASE [%s] SET MULTI_USER;
+GO
+`, conn.DatabaseName, conn.DatabaseName, backupPath, conn.DatabaseName)
+
+	if err := os.WriteFile(scriptPath, []byte(restoreScript), 0644); err != nil {
+		fmt.Printf("ERROR: Failed to create restore script: %v\n", err)
+		return nil
+	}
+
+	args := []string{
+		"-S", fmt.Sprintf("%s,%d", conn.Host, conn.Port),
+		"-U", conn.Username,
+		"-P", conn.Password,
+		"-d", "master",
+		"-i", scriptPath,
+	}
+
+	if conn.SSL {
+		args = append(args, "-N")
+	}
+
+	return exec.Command(binPath, args...)
+}

apps/api/internal/backup/backup_service.go

@@ -151,6 +151,8 @@ func (s *BackupService) createMultiDatabaseBackup(conn *connection.StoredConnect
 			cmd = s.createMongoDumpCmd(&tempConn, backupPath)
 		case "redis":
 			cmd = s.createRedisDumpCmd(&tempConn, backupPath)
+		case "mssql":
+			cmd = s.createMSSQLDumpCmd(&tempConn, backupPath)
 		default:
 			return nil, fmt.Errorf("unsupported database type for backup: %s", conn.Type)
 		}

apps/api/internal/connection/connection_config.go

@@ -6,6 +6,7 @@ import (
 	"database/sql"
 	"fmt"
 
+	_ "github.com/denisenkom/go-mssqldb"
 	"github.com/go-sql-driver/mysql"
 	"github.com/lib/pq"
 	"github.com/mattn/go-sqlite3"
@@ -39,6 +40,8 @@ func (cm *ConnectionManager) Connect(config ConnectionConfig) error {
 		return cm.connectMongoDB(config)
 	case "redis":
 		return cm.connectRedis(config)
+	case "mssql":
+		return cm.connectMSSQL(config)
 	default:
 		return fmt.Errorf("unsupported database type: %s", config.Type)
 	}
@@ -76,6 +79,8 @@ func (cm *ConnectionManager) connectWithSSH(config ConnectionConfig) error {
 		connErr = cm.connectMongoDB(tunnelConfig)
 	case "redis":
 		connErr = cm.connectRedis(tunnelConfig)
+	case "mssql":
+		connErr = cm.connectMSSQL(tunnelConfig)
 	default:
 		tunnel.Stop()
 		return fmt.Errorf("unsupported database type: %s", config.Type)
@@ -205,6 +210,30 @@ func (cm *ConnectionManager) connectRedis(config ConnectionConfig) error {
 	return nil
 }
 
+func (cm *ConnectionManager) connectMSSQL(config ConnectionConfig) error {
+	dsn := fmt.Sprintf("server=%s;port=%d;user id=%s;password=%s;database=%s",
+		config.Host, config.Port, config.Username, config.Password, config.Database)
+
+	if config.SSL {
+		dsn += ";encrypt=true;TrustServerCertificate=false"
+	} else {
+		dsn += ";encrypt=disable"
+	}
+
+	db, err := sql.Open("sqlserver", dsn)
+	if err != nil {
+		return fmt.Errorf("failed to open MSSQL connection: %w", err)
+	}
+
+	if err := db.Ping(); err != nil {
+		db.Close()
+		return fmt.Errorf("failed to ping MSSQL: %w", err)
+	}
+
+	cm.connections[config.ID] = db
+	return nil
+}
+
 func (cm *ConnectionManager) Disconnect(id string) error {
 	conn, exists := cm.connections[id]
 	if !exists {

apps/web/components/views/connections/connection-form.tsx

@@ -66,6 +66,8 @@ export function ConnectionForm({ onSuccess, onCancel }: ConnectionFormProps) {
         'mongo': 'mongodb',
         'redis': 'redis',
         'rediss': 'redis',
+        'mssql': 'mssql',
+        'sqlserver': 'mssql',
       };
 
       const mappedType = typeMapping[type];
@@ -74,7 +76,7 @@ export function ConnectionForm({ onSuccess, onCancel }: ConnectionFormProps) {
         toast({
           variant: "destructive",
           title: "Unsupported Database Type",
-          description: `The database type "${type}" is not supported. Supported types: PostgreSQL, MySQL, MongoDB, Redis`,
+          description: `The database type "${type}" is not supported. Supported types: PostgreSQL, MySQL, MongoDB, Redis, MSSQL`,
         });
         return false;
       }
@@ -118,6 +120,7 @@ export function ConnectionForm({ onSuccess, onCancel }: ConnectionFormProps) {
       'mysql': 3306,
       'mongodb': 27017,
       'redis': 6379,
+      'mssql': 1433,
     };
     return ports[type] || 5432;
   };
@@ -251,6 +254,7 @@ export function ConnectionForm({ onSuccess, onCancel }: ConnectionFormProps) {
           <SelectContent>
             <SelectItem value="postgresql">PostgreSQL</SelectItem>
             <SelectItem value="mysql">MySQL</SelectItem>
+            <SelectItem value="mssql">MSSQL</SelectItem>
             <SelectSeparator />
             <SelectItem value="mongodb">MongoDB</SelectItem>
             <SelectItem value="redis">Redis</SelectItem>

apps/web/types/base.ts

@@ -23,11 +23,12 @@ export const statusColors: Record<StatusColor, string> = {
   running: "bg-blue-500/15 text-blue-500 border-blue-500/20",
 };
 
-export type DatabaseType = 'mysql' | 'postgresql' | 'mongodb' | 'redis';
+export type DatabaseType = 'mysql' | 'postgresql' | 'mongodb' | 'redis' | 'mssql';
 
 export const typeLabels: Record<DatabaseType, string> = {
   mysql: 'MySQL',
   postgresql: 'PostgreSQL',
   mongodb: 'MongoDB',
   redis: 'Redis',
+  mssql: 'MSSQL',
 } as const;