Add QIFEMPTY().

Documentation/Manual.rst

@@ -6729,9 +6729,24 @@ Example::
 
     10.sql = SELECT QMORE("This is a text which is longer than 10 characters", 10)
 
-Output:
+Output::
 
-This is a `more..`
+  This is a `more..`
+
+.. _qifempty:
+
+QIFEMPTY: if empty show token
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The SQL function QIFEMPTY(input, token) returns 'token' if 'input' is empty else 'input'.
+
+Example::
+
+    10.sql = SELECT QIFEMPTY('hello world','-'), QIFEMPTY('','-')
+
+Output::
+
+  hello world-
 
 .. _download:
 

extension/Classes/Sql/function.sql

@@ -51,7 +51,6 @@ SET output = REPLACE(input, '|', '\\|');
 RETURN output;
 END;
 
-
 ###
 #
 # QNL2BR(input)
@@ -65,4 +64,19 @@ BEGIN
 DECLARE output TEXT;
 SET output = REPLACE( REPLACE(input, CHAR(13), ''), CHAR(10), '<br>');
 RETURN output;
-END
\ No newline at end of file
+END;
+
+###
+#
+# QIFEMPTY(input, token)
+# If 'input' is empty, replaces by 'token'
+#
+DROP FUNCTION IF EXISTS QIFEMPTY;
+CREATE FUNCTION QIFEMPTY(input TEXT, token TEXT)
+  RETURNS TEXT
+  DETERMINISTIC
+BEGIN
+  DECLARE output TEXT;
+  SET output = IF(input = '', token, input);
+  RETURN output;
+END;