extended stats: Clarify behavior of omitting stat type clause

Pointed out by Jeff Janes
Discussion: https://postgr.es/m/CAMkU=1zGhK-nW10RAXhokcT3MM=YBg=j5LkG9RMDwmu3i0H0Og@mail.gmail.com

diff --git a/doc/src/sgml/ref/create_statistics.sgml b/doc/src/sgml/ref/create_statistics.sgml
index 854746de24da439f5198f66c3cb13921b695295a..f319a6ea9c2163b54f309720381e0efdcb4c70e4 100644 (file)
--- a/doc/src/sgml/ref/create_statistics.sgml
+++ b/doc/src/sgml/ref/create_statistics.sgml
@@ -84,6 +84,8 @@ CREATE STATISTICS [ IF NOT EXISTS ] statistics_na
       ndistinct, which enables n-distinct statistics, and
       dependencies, which enables functional
       dependency statistics.
+      If this clause is omitted, all supported statistic types are
+      included in the statistics object.
       For more information, see 
       and .