Fixed notice

Civi/DataProcessor/DataFlow/SqlDataFlow/AndClause.php

@@ -38,6 +38,13 @@ class AndClause extends AbstractWhereClause implements WhereClauseInterface {
     $this->clauses[] = $clause;
   }
 
+  public function hasWhereClauses(): bool {
+    if (count($this->clauses)) {
+      return true;
+    }
+    return false;
+  }
+
   /**
    * Returns the where clause
    * E.g. contact_type = 'Individual'

Civi/DataProcessor/DataFlow/SqlDataFlow/OrClause.php

@@ -37,6 +37,13 @@ class OrClause extends AbstractWhereClause implements WhereClauseInterface {
     $this->clauses[] = $clause;
   }
 
+  public function hasWhereClauses(): bool {
+    if (count($this->clauses)) {
+      return true;
+    }
+    return false;
+  }
+
   /**
    * Returns the where clause
    * E.g. contact_type = 'Individual'

Civi/DataProcessor/FilterCollection/FilterCollection.php

@@ -194,7 +194,7 @@ class FilterCollection {
     } elseif ($this->whereClause instanceof OrClause) {
       $this->whereClause->removeWhereClause($where);
     }
-    if ($this->data_processor && $this->whereClause && !count($this->whereClause->getWhereClause())) {
+    if ($this->data_processor && $this->whereClause && !$this->whereClause->hasWhereClauses()) {
       $this->data_processor->getDataFlow()->removeWhereClause($this->whereClause);
     }
   }