diff --git a/doc/src/sgml/ref/alter_index.sgml b/doc/src/sgml/ref/alter_index.sgml
index 6d34dbb74e..1b5b1f7ef1 100644
--- a/doc/src/sgml/ref/alter_index.sgml
+++ b/doc/src/sgml/ref/alter_index.sgml
@@ -27,7 +27,7 @@ ALTER INDEX name ATTACH PARTITION <
ALTER INDEX name DEPENDS ON EXTENSION extension_name
ALTER INDEX [ IF EXISTS ] name SET ( storage_parameter = value [, ... ] )
ALTER INDEX [ IF EXISTS ] name RESET ( storage_parameter [, ... ] )
-ALTER INDEX [ IF EXISTS ] name ALTER [ COLUMN ] column_number
+ALTER INDEX [ IF EXISTS ] name ALTER [ COLUMN ] column_number | column_name
SET STATISTICS integer
ALTER INDEX ALL IN TABLESPACE name [ OWNED BY role_name [, ... ] ]
SET TABLESPACE new_tablespace [ NOWAIT ]
@@ -137,14 +137,12 @@ ALTER INDEX ALL IN TABLESPACE name
- ALTER [ COLUMN ] column_number SET STATISTICS integer
+ ALTER [ COLUMN ] column_number | column_name SET STATISTICS integer
This form sets the per-column statistics-gathering target for
subsequent operations, though can
be used only on index columns that are defined as an expression.
- Since expressions lack a unique name, we refer to them using the
- ordinal number of the index column.
The target can be set in the range 0 to 10000; alternatively, set it
to -1 to revert to using the system default statistics
target ().
@@ -175,6 +173,15 @@ ALTER INDEX ALL IN TABLESPACE name
+
+ column_name
+
+
+ The name of an existing index column.
+
+
+
+
column_number