desktop/src/components/connections/NewConnectionScreen.tsx

@@ -31,6 +31,7 @@ type Stage = "entry" | "configured";
 const FALLBACK_PORTS: Record<string, number> = {
     postgresql: 5432,
     mysql: 3306,
+    mariadb: 3306,
     redis: 6379,
 };
 

desktop/src/components/editor/QueryToolbar.tsx

@@ -9,6 +9,7 @@ import type { DbType } from "../../lib/types";
 const DB_TYPE_LABELS: Record<DbType, string> = {
   postgresql: "PostgreSQL",
   mysql: "MySQL",
+  mariadb: "MariaDB",
   sqlite: "SQLite",
   redis: "Redis",
 };

desktop/src/components/layout/DbTypeFilterDropdown.tsx

@@ -7,6 +7,7 @@ import type { DbType } from "../../lib/types";
 const DB_TYPES: { value: DbType; label: string }[] = [
   { value: "postgresql", label: "PostgreSQL" },
   { value: "mysql", label: "MySQL" },
+  { value: "mariadb", label: "MariaDB" },
   { value: "sqlite", label: "SQLite" },
   { value: "redis", label: "Redis" },
 ];

desktop/src/lib/connectionString.test.ts

@@ -125,6 +125,30 @@ describe("parseConnectionString", () => {
     });
   });
 
+  it("parses mariadb:// with the 3306 default port", () => {
+    const result = parseConnectionString("mariadb://root:pw@localhost/app");
+    expect(result).toEqual({
+      db_type: "mariadb",
+      host: "localhost",
+      port: 3306,
+      username: "root",
+      password: "pw",
+      database: "app",
+    });
+  });
+
+  it("keeps mysql:// mapped to the mysql db_type", () => {
+    const result = parseConnectionString("mysql://root:pw@localhost:3307/app");
+    expect(result).toEqual({
+      db_type: "mysql",
+      host: "localhost",
+      port: 3307,
+      username: "root",
+      password: "pw",
+      database: "app",
+    });
+  });
+
   it("defaults Redis port to 6379 when omitted", () => {
     const result = parseConnectionString("redis://localhost");
     expect(result).toEqual({
@@ -212,6 +236,22 @@ describe("buildConnectionUrl", () => {
     expect(url).toBe("mysql://root:pw@127.0.0.1:3306/app");
   });
 
+  it("emits mariadb:// for a mariadb connection", () => {
+    const url = buildConnectionUrl(
+      makeConn({ db_type: "mariadb", host: "127.0.0.1", port: 3306, username: "root", database: "app" }),
+      "pw",
+    );
+    expect(url).toBe("mariadb://root:pw@127.0.0.1:3306/app");
+  });
+
+  it("omits the password in the mariadb no-password variant", () => {
+    const url = buildConnectionUrl(
+      makeConn({ db_type: "mariadb", host: "127.0.0.1", port: 3306, username: "root", database: "app" }),
+      null,
+    );
+    expect(url).toBe("mariadb://root@127.0.0.1:3306/app");
+  });
+
   it("builds a Redis URL with password but no username", () => {
     const url = buildConnectionUrl(
       makeConn({ db_type: "redis", host: "localhost", port: 6379, username: null, database: "0" }),

desktop/src/lib/connectionString.ts

@@ -13,6 +13,7 @@ const DB_PROTOCOLS: Record<string, DbType> = {
   "postgresql:": "postgresql",
   "postgres:": "postgresql",
   "mysql:": "mysql",
+  "mariadb:": "mariadb",
   "sqlite:": "sqlite",
   "file:": "sqlite",
   "redis:": "redis",
@@ -22,6 +23,7 @@ const DB_PROTOCOLS: Record<string, DbType> = {
 const DEFAULT_PORTS: Record<DbType, number | null> = {
   postgresql: 5432,
   mysql: 3306,
+  mariadb: 3306,
   sqlite: null,
   redis: 6379,
 };
@@ -127,6 +129,8 @@ export function buildConnectionUrl(conn: Connection, password: string | null): s
     }
     case "mysql":
       return `mysql://${auth}${conn.host}${port}${db}`;
+    case "mariadb":
+      return `mariadb://${auth}${conn.host}${port}${db}`;
     case "sqlite":
       // host stores the file path; `sqlite:///abs/path` round-trips through
       // parseConnectionString (pathname → host).

desktop/src/lib/dbCapabilities.test.ts

@@ -23,6 +23,16 @@ describe("dbCapabilities", () => {
     expect(c.visualizer).toBe(false);
   });
 
+  it("gives MariaDB the same capability set as MySQL", () => {
+    expect(DB_CAPABILITIES.mariadb).toEqual(DB_CAPABILITIES.mysql);
+  });
+
+  it("covers exactly the five DbTypes", () => {
+    expect(Object.keys(DB_CAPABILITIES).sort()).toEqual(
+      ["mariadb", "mysql", "postgresql", "redis", "sqlite"],
+    );
+  });
+
   it("gives SQLite explorer/queries/visualizer/editing/import/ddl/tools/tableManagement but not objects", () => {
     const c = DB_CAPABILITIES.sqlite;
     expect(c.explorer).toBe(true);

desktop/src/lib/dbCapabilities.ts

@@ -36,6 +36,7 @@ const ALL_FALSE: DbCapabilities = {
 export const DB_CAPABILITIES: Record<DbType, DbCapabilities> = {
   postgresql: { ...ALL_FALSE, explorer: true, queries: true, objects: true, visualizer: true, tools: true, editing: true, import: true, ddl: true, objectCrud: true, maintenance: true, roles: true, tableManagement: true },
   mysql:      { ...ALL_FALSE, explorer: true, queries: true, editing: true, import: true, ddl: true, tools: true },
+  mariadb:    { ...ALL_FALSE, explorer: true, queries: true, editing: true, import: true, ddl: true, tools: true },
   sqlite:     { ...ALL_FALSE, explorer: true, queries: true, visualizer: true, editing: true, import: true, ddl: true, tools: true, tableManagement: true },
   redis:      { ...ALL_FALSE },
 };

desktop/src/lib/dbIcons.tsx

@@ -1,10 +1,11 @@
-import { siPostgresql, siMysql, siSqlite, siRedis, siSupabase, siNeon } from "simple-icons";
+import { siPostgresql, siMysql, siMariadb, siSqlite, siRedis, siSupabase, siNeon } from "simple-icons";
 import type { DbType } from "./types";
 
 // Brand colors from simple-icons
 const DB_COLORS: Record<DbType, string> = {
   postgresql: `#${siPostgresql.hex}`,
   mysql: `#${siMysql.hex}`,
+  mariadb: `#${siMariadb.hex}`,
   redis: `#${siRedis.hex}`,
   sqlite: `#${siSqlite.hex}`,
 };
@@ -13,6 +14,7 @@ const DB_COLORS: Record<DbType, string> = {
 const DB_PATHS: Record<DbType, string> = {
   postgresql: siPostgresql.path,
   mysql: siMysql.path,
+  mariadb: siMariadb.path,
   redis: siRedis.path,
   sqlite: siSqlite.path,
 };
@@ -20,6 +22,7 @@ const DB_PATHS: Record<DbType, string> = {
 export const DB_LABELS: Record<DbType, string> = {
   postgresql: "PostgreSQL",
   mysql: "MySQL",
+  mariadb: "MariaDB",
   redis: "Redis",
   sqlite: "SQLite",
 };
@@ -54,6 +57,7 @@ export function DbIcon({ type, size = 20, className }: DbIconProps) {
 export const DB_ICONS: Record<DbType, string> = {
   postgresql: "🐘",
   mysql: "🐬",
+  mariadb: "🦭",
   redis: "⚡",
   sqlite: "🗄️",
 };

desktop/src/lib/providers.test.ts

@@ -2,12 +2,19 @@ import { describe, it, expect } from "vitest";
 import { PROVIDER_TABS, getProviderById, SETUP_GUIDES } from "./providers";
 
 describe("providers", () => {
-  it("defines exactly 6 provider tabs in order", () => {
+  it("defines exactly 7 provider tabs in order", () => {
     expect(PROVIDER_TABS.map((p) => p.id)).toEqual([
-      "postgresql", "mysql", "sqlite", "redis", "supabase", "neon",
+      "postgresql", "mysql", "mariadb", "sqlite", "redis", "supabase", "neon",
     ]);
   });
 
+  it("includes a plain (non-managed) MariaDB tab persisting db_type mariadb", () => {
+    const tab = getProviderById("mariadb")!;
+    expect(tab.dbType).toBe("mariadb");
+    expect(tab.isManagedPreset).toBe(false);
+    expect(tab.label).toBe("MariaDB");
+  });
+
   it("marks only supabase and neon as managed presets mapping to postgresql", () => {
     const pg = getProviderById("postgresql")!;
     expect(pg.dbType).toBe("postgresql");

desktop/src/lib/providers.ts

@@ -1,6 +1,6 @@
 import type { DbType } from "./types";
 
-export type ProviderId = "postgresql" | "mysql" | "sqlite" | "redis" | "supabase" | "neon";
+export type ProviderId = "postgresql" | "mysql" | "mariadb" | "sqlite" | "redis" | "supabase" | "neon";
 
 export interface ProviderTab {
   id: ProviderId;
@@ -15,6 +15,7 @@ export interface ProviderTab {
 export const PROVIDER_TABS: ProviderTab[] = [
   { id: "postgresql", label: "PostgreSQL", dbType: "postgresql", isManagedPreset: false },
   { id: "mysql", label: "MySQL", dbType: "mysql", isManagedPreset: false },
+  { id: "mariadb", label: "MariaDB", dbType: "mariadb", isManagedPreset: false },
   { id: "sqlite", label: "SQLite", dbType: "sqlite", isManagedPreset: false },
   { id: "redis", label: "Redis", dbType: "redis", isManagedPreset: false },
   { id: "supabase", label: "Supabase", dbType: "postgresql", isManagedPreset: true },

desktop/src/lib/types.ts

@@ -1,4 +1,4 @@
-export type DbType = "postgresql" | "mysql" | "sqlite" | "redis";
+export type DbType = "postgresql" | "mysql" | "mariadb" | "sqlite" | "redis";
 
 export type Theme = "dark" | "light" | "system";
 export type FontSize = "small" | "medium" | "large";

desktop/src/lib/utils.ts

@@ -31,7 +31,7 @@ export function abbreviateType(dataType: string): string {
   return TYPE_ABBREV[lower] ?? dataType;
 }
 
-const VALID_DB_TYPES: DbType[] = ["postgresql", "mysql", "sqlite", "redis"];
+const VALID_DB_TYPES: DbType[] = ["postgresql", "mysql", "mariadb", "sqlite", "redis"];
 
 export function validateConnectionInput(input: ConnectionInput): ValidationResult {
   if (!input.name || input.name.length === 0) return { ok: false, error: "name is required" };