feat(db): add Microsoft SQL Server driver support (#276)

The database tool window can connect to Microsoft SQL Server (tiberius over rustls with a bb8 pool): browse schema objects, edit table data, run queries and view plans; SQL Server dialect, object dialogs and icons in the UI.

Values are rendered by column type: exact decimal/numeric, money with four decimals, tinyint, uniqueidentifier, date/time/datetime/datetime2/smalldatetime/datetimeoffset in ISO form, xml and binary. Multi-statement edits roll back on any failure and discard the connection rather than returning it to the pool mid-transaction; connect-time errors (login, database) are reported; result pagination reports more rows; cancelling a query stops reading and drops the stream. The sqlx drivers keep the shared with_pool! path.

Co-authored-by: dimassfeb-09 <[email protected]>

src/features/database/sql/dialect.ts

@@ -154,6 +154,29 @@ export const DATA_TYPES: Record<DbDriver, string[]> = {
     "BOOLEAN",
     "ENUM",
   ],
+  sqlServer: [
+    "INT",
+    "BIGINT",
+    "SMALLINT",
+    "TINYINT",
+    "VARCHAR",
+    "NVARCHAR",
+    "CHAR",
+    "NCHAR",
+    "TEXT",
+    "NTEXT",
+    "DECIMAL",
+    "FLOAT",
+    "REAL",
+    "DATE",
+    "DATETIME",
+    "DATETIME2",
+    "TIME",
+    "UNIQUEIDENTIFIER",
+    "BIT",
+    "VARBINARY",
+    "XML",
+  ],
 };
 
 const f = (name: string, params: string, returns?: string, aggregate?: boolean): SqlFunction => ({
@@ -260,6 +283,20 @@ const FUNCTIONS: Record<DbDriver, SqlFunction[]> = {
     f("row_number", "", "bigint"),
     f("rank", "", "bigint"),
   ],
+  sqlServer: [
+    ...COMMON,
+    f("getdate", "", "datetime"),
+    f("getutcdate", "", "datetime"),
+    f("dateadd", "part, n, date", "datetime"),
+    f("datediff", "part, a, b", "int"),
+    f("isnull", "a, b"),
+    f("iif", "cond, then, else"),
+    f("concat", "value, ...", "text"),
+    f("format", "value, format", "text"),
+    f("newid", "", "uniqueidentifier"),
+    f("row_number", "", "bigint"),
+    f("rank", "", "bigint"),
+  ],
 };
 
 export function functions(driver: DbDriver): SqlFunction[] {