Add date_trunc('', interval) documentation mention

Report from Eric Howe

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 53021c227d7ea168dee01c0dd1dcc2d6b9325d67..e79c479ac31eae4f60aac0779ae159f4a774fe41 100644 (file)
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -6567,6 +6567,20 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
         2001-02-16 20:00:00
        
 
+       
+        
+         
+          date_trunc
+         
+         date_trunc(text, interval)
+        
+        interval
+        Truncate to specified precision; see also 
+        
+        date_trunc('hour', interval '2 days 3 hours 40 minutes')
+        2 days 03:00:00
+       
+