Describe the bug

If a pivot table has a cell with a NULL value it displays an empty cell in the visualization unless a suffix has been configured. In that case it displays "null" with the suffix appended on the end.

Without suffix:

With Suffix:

To Reproduce

1. Create a Model using this query from the Sample Database:

(SELECT
"PUBLIC"."PRODUCTS"."ID" AS "ID",
"PUBLIC"."PRODUCTS"."EAN" AS "EAN",
"PUBLIC"."PRODUCTS"."TITLE" AS "TITLE",
"PUBLIC"."PRODUCTS"."CATEGORY" AS "CATEGORY",
"PUBLIC"."PRODUCTS"."VENDOR" AS "VENDOR",
"PUBLIC"."PRODUCTS"."PRICE" AS "PRICE",
"PUBLIC"."PRODUCTS"."RATING" AS "RATING",
"PUBLIC"."PRODUCTS"."CREATED_AT" AS "CREATED_AT"
FROM
"PUBLIC"."PRODUCTS"
where "PUBLIC"."PRODUCTS"."CATEGORY" <> 'Gizmo'
LIMIT 50)

union all

( SELECT
"PUBLIC"."PRODUCTS"."ID" AS "ID",
"PUBLIC"."PRODUCTS"."EAN" AS "EAN",
"PUBLIC"."PRODUCTS"."TITLE" AS "TITLE",
"PUBLIC"."PRODUCTS"."CATEGORY" AS "CATEGORY",
"PUBLIC"."PRODUCTS"."VENDOR" AS "VENDOR",
null AS "PRICE",
"PUBLIC"."PRODUCTS"."RATING" AS "RATING",
"PUBLIC"."PRODUCTS"."CREATED_AT" AS "CREATED_AT"
FROM
"PUBLIC"."PRODUCTS"
LIMIT 50)

2. In the GUI Builder take a minimum of price grouped by Category and Vendor
3. View as a Pivot and observe all of the empty price results for the "Gizmo" category
4. Add " dollars" as a suffix for the price measure
5. Observe the cells now display "null dollars"

Expected behavior

The cell should still be empty

Logs

No response

Information about your Metabase installation

{
  "browser-info": {
    "language": "en-US",
    "platform": "Win32",
    "userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36",
    "vendor": "Google Inc."
  },
  "system-info": {
    "file.encoding": "UTF-8",
    "java.runtime.name": "OpenJDK Runtime Environment",
    "java.runtime.version": "11.0.23+9",
    "java.vendor": "Eclipse Adoptium",
    "java.vendor.url": "https://adoptium.net/",
    "java.version": "11.0.23",
    "java.vm.name": "OpenJDK 64-Bit Server VM",
    "java.vm.version": "11.0.23+9",
    "os.name": "Linux",
    "os.version": "5.15.133.1-microsoft-standard-WSL2",
    "user.language": "en",
    "user.timezone": "GMT"
  },
  "metabase-info": {
    "databases": [
      "h2",
      "postgres"
    ],
    "hosting-env": "unknown",
    "application-database": "postgres",
    "application-database-details": {
      "database": {
        "name": "PostgreSQL",
        "version": "11.22 (Debian 11.22-1.pgdg110+1)"
      },
      "jdbc-driver": {
        "name": "PostgreSQL JDBC Driver",
        "version": "42.7.2"
      }
    },
    "run-mode": "prod",
    "version": {
      "date": "2024-05-09",
      "tag": "v1.49.9",
      "hash": "c0913c7"
    },
    "settings": {
      "report-timezone": null
    }
  }
}

Severity

It's not pretty

Additional context

No response