code · pull · Apr 1, 2026 · Apr 1, 2026 · Apr 1, 2026
diff --git a/.github/workflows/drivers-tests.yml b/.github/workflows/drivers-tests.yml
@@ -296,6 +296,8 @@ jobs:
             use_tesseract_sql_planner: true
           - database: clickhouse
             use_tesseract_sql_planner: true
+          - database: mssql
+            use_tesseract_sql_planner: true
       fail-fast: false
 
     steps:

diff --git a/docs/content/product/administration/workspace/maintenance-window.mdx b/docs/content/product/administration/workspace/maintenance-window.mdx
@@ -53,7 +53,7 @@ snapshot during the window.
 Navigate to <Btn>Admin → Settings → Maintenance Window</Btn> in the Cube Cloud
 console.
 
-<Screenshot src="https://lgo0ecceic.ucarecd.net/2ce65ee8-4041-435f-8d74-a84b1b9d6d53/" />
+<Screenshot src="https://lgo0ecceic.ucarecd.net/e6db33a7-0d5e-4e28-8494-554393eaf2cb/" />
 
 1. Toggle **Enable Scheduled Maintenance Window** to on.
 2. Select the **Day of week** (e.g., Sunday).
@@ -95,6 +95,27 @@ revert to an older version, contact support.
 
 </WarningBox>
 
+## Upgrade now
+
+If a critical fix has been released and you don't want to wait for the
+next scheduled maintenance window, you can apply the latest eligible
+snapshot immediately.
+
+When the maintenance window is enabled, an **Upgrade Now** section
+appears at the bottom of the settings page. Click **Upgrade Now** to
+advance to the latest eligible snapshot right away.
+
+The button is disabled while the upgrade is in progress. Once complete,
+the new version will appear in the **Active Version** dropdown.
+
+<InfoBox>
+
+The same eligibility rules apply — only snapshots that are at least
+24 hours old are considered. If you are already on the latest eligible
+snapshot, the button will return an error.
+
+</InfoBox>
+
 ## FAQ
 
 ### What happens if I disable the maintenance window?
@@ -122,4 +143,10 @@ Yes. When the maintenance window is enabled, the settings page shows an
 Select any of them to switch back. See [Active version](#active-version)
 above for details.
 
+### Can I trigger an immediate upgrade without waiting for the window?
+
+Yes. Use the **Upgrade Now** button on the settings page to apply the
+latest eligible snapshot immediately. See [Upgrade now](#upgrade-now)
+above for details.
+
 [ref-dedicated]: /product/deployment/cloud/deployment-types#production-cluster
diff --git a/packages/cubejs-schema-compiler/src/adapter/MssqlQuery.ts b/packages/cubejs-schema-compiler/src/adapter/MssqlQuery.ts
@@ -268,11 +268,15 @@ export class MssqlQuery extends BaseQuery {
     const templates = super.sqlTemplates();
     templates.functions.LEAST = 'LEAST({{ args_concat }})';
     templates.functions.GREATEST = 'GREATEST({{ args_concat }})';
+    // MSSQL ROUND requires 2 arguments: ROUND(number, length)
+    templates.functions.ROUND = 'ROUND({{ args_concat }}{% if args | length < 2 %}, 0{% endif %})';
     // NOTE: MSSQL does not support DISTINCT clause. No workaround is available
     delete templates.functions.STRING_AGG;
     // PERCENTILE_CONT works but requires PARTITION BY
     delete templates.functions.PERCENTILECONT;
     delete templates.expressions.ilike;
+    // MSSQL uses + for string concatenation instead of ||
+    templates.expressions.concat_strings = '{{ strings | join(\' + \' ) }}';
     // NOTE: this template contains a comma; two order expressions are being generated
     templates.expressions.sort = '{{ expr }} IS NULL {% if nulls_first %}DESC{% else %}ASC{% endif %}, {{ expr }} {% if asc %}ASC{% else %}DESC{% endif %}';
     templates.types.string = 'VARCHAR';
@@ -298,11 +302,37 @@ export class MssqlQuery extends BaseQuery {
       '{% if not loop.last %}, {% endif %}' +
       '{% endfor %}' +
       ') AS dates (date_from, date_to)';
+    // MSSQL uses recursive CTE for time series generation.
+    // The template body becomes content of `time_series AS (...)` CTE,
+    // so it self-references `time_series` for recursion.
+    templates.statements.generated_time_series_select =
+      'SELECT CAST({{ start }} AS DATETIME2) AS date_from,\n' +
+      '       DATEADD(MILLISECOND, -1, DATEADD({{ minimal_time_unit }}, 1, CAST({{ start }} AS DATETIME2))) AS date_to\n' +
+      'UNION ALL\n' +
+      'SELECT DATEADD({{ minimal_time_unit }}, 1, date_from),\n' +
+      '       DATEADD(MILLISECOND, -1, DATEADD({{ minimal_time_unit }}, 1, DATEADD({{ minimal_time_unit }}, 1, date_from)))\n' +
+      'FROM time_series\n' +
+      'WHERE DATEADD({{ minimal_time_unit }}, 1, date_from) <= CAST({{ end }} AS DATETIME2)';
+
+    templates.statements.generated_time_series_with_cte_range_source =
+      'SELECT {{ range_source }}.{{ min_name }} AS date_from,\n' +
+      '       DATEADD(MILLISECOND, -1, DATEADD({{ minimal_time_unit }}, 1, {{ range_source }}.{{ min_name }})) AS date_to,\n' +
+      '       {{ range_source }}.{{ max_name }} AS max_date\n' +
+      'FROM {{ range_source }}\n' +
+      'UNION ALL\n' +
+      'SELECT DATEADD({{ minimal_time_unit }}, 1, date_from),\n' +
+      '       DATEADD(MILLISECOND, -1, DATEADD({{ minimal_time_unit }}, 1, DATEADD({{ minimal_time_unit }}, 1, date_from))),\n' +
+      '       max_date\n' +
+      'FROM time_series\n' +
+      'WHERE DATEADD({{ minimal_time_unit }}, 1, date_from) <= max_date';
+
     // MSSQL uses OFFSET/FETCH instead of LIMIT/OFFSET
+    templates.tesseract.ilike = 'LOWER({{ expr }}) {% if negated %}NOT {% endif %}LIKE LOWER({{ pattern }})';
+    templates.filters.like_pattern = 'CONCAT({% if start_wild %}\'%\'{% else %}\'\'{% endif %}, LOWER({{ value }}), {% if end_wild %}\'%\'{% else %}\'\'{% endif %})';
     templates.statements.select = '{% if ctes %} WITH \n' +
       '{{ ctes | join(\',\n\') }}\n' +
       '{% endif %}' +
-      'SELECT {% if distinct %}DISTINCT {% endif %}' +
+      'SELECT {% if limit is not none and not order_by %}TOP {{ limit }} {% endif %}{% if distinct %}DISTINCT {% endif %}' +
       '{{ select_concat | map(attribute=\'aliased\') | join(\', \') }} {% if from %}\n' +
       'FROM (\n' +
       '{{ from | indent(2, true) }}\n' +
@@ -312,8 +342,9 @@ export class MssqlQuery extends BaseQuery {
       '{% if filter %}\nWHERE {{ filter }}{% endif %}' +
       '{% if group_by %}\nGROUP BY {{ group_by }}{% endif %}' +
       '{% if having %}\nHAVING {{ having }}{% endif %}' +
-      '{% if order_by %}\nORDER BY {{ order_by | map(attribute=\'expr\') | join(\', \') }}\nOFFSET {% if offset is not none %}{{ offset }}{% else %}0{% endif %} ROWS{% endif %}' +
-      '{% if limit is not none %}\nFETCH NEXT {{ limit }} ROWS ONLY{% endif %}';
+      '{% if order_by %}\nORDER BY {{ order_by | map(attribute=\'expr\') | join(\', \') }}\nOFFSET {% if offset is not none %}{{ offset }}{% else %}0{% endif %} ROWS' +
+      '\nFETCH NEXT {% if limit is not none %}{{ limit }}{% else %}2147483647{% endif %} ROWS ONLY{% endif %}' +
+      '{% if ctes %}\nOPTION (MAXRECURSION 0){% endif %}';
     return templates;
   }
 }
diff --git a/packages/cubejs-testing-drivers/fixtures/_schemas.json b/packages/cubejs-testing-drivers/fixtures/_schemas.json
@@ -441,7 +441,7 @@
         {
           "name": "percentageOfTotalForStatus",
           "type": "number",
-          "sql": "ROUND(100 * {totalProfit} / NULLIF({totalProfitForStatus}, 0))",
+          "sql": "ROUND(100 * {totalProfit} / NULLIF({totalProfitForStatus}, 0), 0)",
           "multi_stage": true
         },
         {

diff --git a/packages/cubejs-testing-drivers/fixtures/mssql.json b/packages/cubejs-testing-drivers/fixtures/mssql.json
@@ -183,5 +183,74 @@
     "---------------------------------------",
     "SQL API: Rolling Window YTD (year + month + day + date_trunc equal)",
     "SQL API: Rolling Window YTD (year + month + day + date_trunc IN)"
+  ],
+  "tesseractSkip": [
+    "---------------------------------------",
+    "SKIPPED FOR MS SQL (total not supported)",
+    "---------------------------------------",
+    "querying Customers: dimensions + total",
+    "querying Customers: dimensions + order + limit + total",
+    "querying Customers: dimensions + order + total + offset",
+    "querying Customers: dimensions + order + limit + total + offset",
+    "querying Products: dimensions + order + total",
+    "querying Products: dimensions + order + limit + total",
+    "querying ECommerce: dimensions + total",
+    "querying ECommerce: dimensions + order + limit + total",
+    "querying ECommerce: dimensions + order + total + offset",
+    "querying ECommerce: dimensions + order + limit + total + offset",
+
+    "---------------------------------------",
+    "SKIPPED FOR ALL                        ",
+    "---------------------------------------",
+    "querying Products: dimensions -- doesn't work wo ordering",
+    "querying ECommerce: total quantity, avg discount, total sales, total profit by product + order + total -- rounding in athena",
+    "querying ECommerce: total sales, total profit by month + order (date) + total -- doesn't work with the BigQuery",
+    "querying ECommerce: total quantity, avg discount, total sales, total profit by product + order + total -- noisy test",
+    "querying BigECommerce: null sum",
+    "querying BigECommerce: null boolean",
+    "---------------------------------------",
+    "SKIPPED SQL API (Need work)",
+    "---------------------------------------",
+    "SQL API: reuse params",
+    "SQL API: post-aggregate percentage of total",
+    "SQL API: powerbi min max ungrouped flag",
+    "SQL API: powerbi min max push down",
+    "SQL API: Simple Rollup",
+    "SQL API: Complex Rollup",
+    "SQL API: Nested Rollup",
+    "SQL API: Rollup with aliases",
+    "SQL API: Rollup over exprs",
+    "SQL API: Nested Rollup with aliases",
+    "SQL API: Nested Rollup over asterisk",
+    "SQL API: Extended nested Rollup over asterisk",
+    "SQL API: ungrouped pre-agg",
+    "SQL API: NULLS FIRST/LAST SQL push down",
+    "SQL API: SQL push down push to cube quoted alias",
+    "SQL API: Date/time comparison with SQL push down",
+    "SQL API: Date/time comparison with date_trunc with SQL push down",
+
+    "---------------------------------------",
+    "Error during rewrite: Can't detect Cube query and it may be not supported yet.",
+    "---------------------------------------",
+    "SQL API: Rolling Window YTD (year + month + day + date_trunc equal)",
+    "SQL API: Rolling Window YTD (year + month + day + date_trunc IN)",
+    "---------------------------------------",
+    "Switch dimensions",
+    "---------------------------------------",
+    "querying SwitchSourceTest: simple cross join",
+    "querying SwitchSourceTest: full cross join",
+    "querying SwitchSourceTest: filter by switch dimensions",
+
+    "-------",
+    "querying BigECommerce: rolling window YTD (month + week)",
+    "querying BigECommerce: rolling window YTD (month + week + no gran)",
+    "querying BigECommerce: rolling window YTD without granularity",
+    "querying BigECommerce with Retail Calendar: totalCountRetailMonthAgo",
+    "querying BigECommerce with Retail Calendar: totalCountRetailWeekAgo",
+    "SQL API: Timeshift measure from cube",
+    "querying BigECommerce: rolling window YTD (month + week + day + no gran)",
+    "SQL API: Timeshift measure from cube",
+    "querying custom granularities ECommerce: count by two_mo_by_feb + no dimension + rollingCountByLeading without date range",
+    "querying BigECommerce: rolling window YTD (month + week + day)"
   ]
 }