Add proper support for mariadb scheme

autoload/db_ui.vim

@@ -403,14 +403,9 @@ function! s:dbui.populate_schema_info(db) abort
   let parsed_url = self.parse_url(url)
   let scheme = get(parsed_url, 'scheme', '')
   let scheme_info = db_ui#schemas#get(scheme)
-  let schema_support = !empty(get(scheme_info, 'schemes_query', 0))
-  if schema_support && tolower(scheme) ==? 'mysql' && parsed_url.path !=? '/'
-    let schema_support = 0
-  endif
-
   let a:db.scheme = scheme
   let a:db.table_helpers = db_ui#table_helpers#get(scheme)
-  let a:db.schema_support = schema_support
+  let a:db.schema_support = db_ui#schemas#supports_schemes(scheme_info, parsed_url)
   let a:db.quote = get(scheme_info, 'quote', 0)
   let a:db.default_scheme = get(scheme_info, 'default_scheme', '')
   let a:db.filetype = get(scheme_info, 'filetype', 'sql')

autoload/db_ui/schemas.vim

@@ -218,3 +218,18 @@ function! db_ui#schemas#query(db, scheme, query) abort
   let result = call('db#systemlist', s:format_query(a:db, a:scheme, a:query))
   return map(result, {_, val -> substitute(val, "\r$", "", "")})
 endfunction
+
+function db_ui#schemas#supports_schemes(scheme, parsed_url)
+  let schema_support = !empty(get(a:scheme, 'schemes_query', 0))
+  if empty(schema_support)
+    return 0
+  endif
+  let scheme_name = tolower(get(a:parsed_url, 'scheme', ''))
+  " Mysql and MariaDB should not show schemas if the path (database name) is
+  " defined
+  if (scheme_name ==? 'mysql' || scheme_name ==? 'mariadb') && a:parsed_url.path !=? '/'
+    return 0
+  endif
+
+  return 1
+endfunction

autoload/db_ui/table_helpers.vim

@@ -186,6 +186,7 @@ let s:helpers = {
       \ 'bigquery': s:bigquery,
       \ 'postgresql': s:postgres,
       \ 'mysql': s:mysql,
+      \ 'mariadb': s:mysql,
       \ 'oracle': s:oracle,
       \ 'sqlite': s:sqlite,
       \ 'sqlserver': s:sqlserver,