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-rw-r--r--doc/src/sgml/pgupgrade.sgml5
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/src/sgml/pgupgrade.sgml b/doc/src/sgml/pgupgrade.sgml
index 31f1c3d1d48..74fba2e8e02 100644
--- a/doc/src/sgml/pgupgrade.sgml
+++ b/doc/src/sgml/pgupgrade.sgml
@@ -465,6 +465,11 @@ psql --username postgres --file script.sql postgres
</para>
<para>
+ pg_upgrade will not work if the <filename>ltree</>
+ contrib module is installed in a database.
+ </para>
+
+ <para>
You must drop any such columns and migrate them manually.
</para>