Update user_guide_src/source/database/query_builder.rst

Co-authored-by: Michal Sniatala <[email protected]>

Author: sclubricants

user_guide_src/source/database/query_builder.rst

@@ -1618,7 +1618,10 @@ Class Reference
 
         Compiles and executes batch ``UPDATE`` statements.
 
-        .. note:: Set ``$batchSize`` to 0 for unlimited. ``$constraints`` takes a comma delimited string of columns, and array, associative array, or RawSql.
+        .. note:: When more than ``$batchSize`` field/value pairs are provided,
+             multiple queries will be executed, each handling up to ``$batchSize`` 
+             field/value pairs. If we set ``$batchSize`` to 0, then all field/value 
+             pairs will be executed in one query.
 
     .. php:method:: updateFields($set, [$addToDefault = false, [$ignore = null]])