Return with false, if there are no results#4

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anttilinno wants to merge 2 commits intohnsl:masterfrom

anttilinno:master

Commits on May 10, 2016

Return status and return with false, if there are no results
antti-begin
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Commits on May 11, 2016

When column value is null, it cannot be joined with equality
antti-begin
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