Disable upserting for MSSQL in bulkImport for now.

packages/backend-core/src/sql/sql.ts

@@ -588,6 +588,10 @@ class InternalBuilder {
         throw new Error("Primary key is required for upsert")
       }
       return query.insert(parsedBody).onConflict(primary).merge()
+    } else if (this.client === SqlClient.MS_SQL) {
+      // No upsert or onConflict support in MSSQL yet, see:
+      //   https://github.com/knex/knex/pull/6050
+      return query.insert(parsedBody)
     }
     return query.upsert(parsedBody)
   }

packages/server/src/api/routes/tests/row.spec.ts

@@ -65,6 +65,7 @@ describe.each([
   [DatabaseName.MARIADB, getDatasource(DatabaseName.MARIADB)],
 ])("/rows (%s)", (providerType, dsProvider) => {
   const isInternal = dsProvider === undefined
+  const isMSSQL = providerType === DatabaseName.SQL_SERVER
   const config = setup.getConfig()
 
   let table: Table
@@ -1013,6 +1014,9 @@ describe.each([
       await assertRowUsage(isInternal ? rowUsage + 2 : rowUsage)
     })
 
+    // Upserting isn't yet supported in MSSQL, see:
+    //   https://github.com/knex/knex/pull/6050
+    !isMSSQL &&
       it("should be able to update existing rows with bulkImport", async () => {
         const table = await config.api.table.save(
           saveTableRequest({