Allow expressions in filter columns

app/config/example.yaml

@@ -27,6 +27,11 @@ tables:
         filters:
             - ['created_at', 'gt', 'expr: date_sub(now(), interval 60 day)']
 
+    # Dump only CMS pages without "FAQ" in their meta title
+    cms_page:
+        filters:
+            - ["expr: COALESCE(meta_title, '')", 'notLike', '%FAQ%']
+
     # Anonymize a table named "my_custom_table"
     my_custom_table:
         converters:

src/Dumper/Mysql/TableFilterExtension.php

@@ -205,7 +205,7 @@ private function applyTableConfigToQueryBuilder(QueryBuilder $queryBuilder, Tabl
 
             $whereExpr = call_user_func_array(
                 $callable,
-                [$this->connection->quoteIdentifier($filter->getColumn()), $value]
+                [$this->getFilterColumn($filter), $value]
             );
 
             $queryBuilder->andWhere($whereExpr);
@@ -303,4 +303,18 @@ private function quoteValue(mixed $value): mixed
 
         return $value;
     }
+
+    /**
+     * Get a filter column so it can be safely injected in SQL query
+     * Extracts a possible expression to use instead of a real column name.
+     *
+     * @param Filter $filter Table filter
+     */
+    private function getFilterColumn(Filter $filter): mixed
+    {
+        $column = $filter->getColumn();
+
+        return str_starts_with($column, 'expr:') ?
+            ltrim(substr($column, 5)) : $this->connection->quoteIdentifier($column);
+    }
 }