XML Function ExtractValue() Returns NULL Instead of Empty String On MySQL Server 5.6.28 & 5.6.29

(Doc ID 2129212.1)

Last updated on FEBRUARY 23, 2018

Applies to:

MySQL Server - Version 5.6 to 5.6 [Release 5.6]
Information in this document applies to any platform.


When the following code is executed on the 5.5 version:

set @x = 'HOLA';
set @y = 'Default Value';
select ExtractValue( @x, '/MESSAGE/DATA2' ) into @y;
select @y;

the output value of @y is: '' (empty string)

But when the same code is executed on the 5.6.28, or 5.6.29 version, the output value of @y is: NULL


Issue introduced in versions 5.6.28 and 5.6.29.


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