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-rw-r--r--src/pl/plpgsql/src/gram.y2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/pl/plpgsql/src/gram.y b/src/pl/plpgsql/src/gram.y
index 4b2dce8cf07..4967a2a6a79 100644
--- a/src/pl/plpgsql/src/gram.y
+++ b/src/pl/plpgsql/src/gram.y
@@ -746,7 +746,7 @@ decl_defkey : assign_operator
| K_DEFAULT
;
-assign_operator : '='
+assign_operator : '=' /* not documented because it might be removed someday */
| COLON_EQUALS
;