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-rw-r--r--doc/src/sgml/trigger.sgml1
1 files changed, 1 insertions, 0 deletions
diff --git a/doc/src/sgml/trigger.sgml b/doc/src/sgml/trigger.sgml
index 22966c06dc0..8f724c86648 100644
--- a/doc/src/sgml/trigger.sgml
+++ b/doc/src/sgml/trigger.sgml
@@ -705,6 +705,7 @@ CREATE TABLE ttest (
This is the source code of the trigger function:
<programlisting><![CDATA[
#include "postgres.h"
+#include "fmgr.h"
#include "executor/spi.h" /* this is what you need to work with SPI */
#include "commands/trigger.h" /* ... triggers ... */
#include "utils/rel.h" /* ... and relations */