diff --git a/doc/src/sgml/limits.sgml b/doc/src/sgml/limits.sgml
index 7713ff7177..b9c0a05b75 100644
--- a/doc/src/sgml/limits.sgml
+++ b/doc/src/sgml/limits.sgml
@@ -68,6 +68,12 @@
+
+ query string length
+ 1 GB
+
+
+
identifier length
63 bytes
@@ -111,6 +117,11 @@
stored inside the heap tuple.
+
+ Both the field size and the query string length are limited to 1GB as that
+ is the maximum size of a string representation.
+
+
Columns that have been dropped from the table also contribute to the maximum
column limit. Moreover, although the dropped column values for newly