Issue #3247840 by drunken monkey: Added a hidden datasource option to disable...

Issue #3247840 by drunken monkey: Added a hidden datasource option to disable the direct SQL query "fast path" for initial entity tracking.

CHANGELOG.txt

 Search API 1.x, dev (xxxx-xx-xx):
 ---------------------------------
+- #3247840 by drunken monkey: Added a hidden datasource option to disable the
+  direct SQL query "fast path" for initial entity tracking.
 
 Search API 1.25 (2022-07-18):
 -----------------------------

config/schema/search_api.datasource.schema.yml

@@ -16,6 +16,9 @@
           sequence:
             type: string
             label: 'A bundle machine name'
+    disable_db_tracking:
+      type: boolean
+      label: 'Do not use a database query for tracking'
     languages:
       type: mapping
       label: 'Languages'

src/Plugin/search_api/datasource/ContentEntity.php

@@ -649,7 +649,10 @@ class ContentEntity extends DatasourcePluginBase implements PluginFormInterface
       }
     }
 
-    $this->setConfiguration($form_state->getValues());
+    // Make sure not to overwrite any options not included in the form (like
+    // "disable_db_tracking") by adding any existing configuration back to the
+    // new values.
+    $this->setConfiguration($form_state->getValues() + $this->configuration);
   }
 
   /**
@@ -790,7 +793,8 @@ class ContentEntity extends DatasourcePluginBase implements PluginFormInterface
     // on large data sets. This allows for better control over what tables are
     // included in the query.
     // If no base table is present, then perform an entity query instead.
-    if ($entity_type->getBaseTable()) {
+    if ($entity_type->getBaseTable()
+        && empty($this->configuration['disable_db_tracking'])) {
       $select = $this->getDatabaseConnection()
         ->select($entity_type->getBaseTable(), 'base_table')
         ->fields('base_table', [$entity_id]);