Github user DaveBirdsall commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/1253#discussion_r142806590
--- Diff: core/sql/generator/GenRelUpdate.cpp ---
@@ -1718,19 +1806,56 @@ short HbaseUpdate::codeGen(Generator * generator)
}
else if (getIndexDesc()->isClusteringIndex() &&
getCheckConstraints().entries())
{
- GenAssert(FALSE, "Should not reach here. This update should have
been transformed to delete/insert");
- // To be uncommented when TRAFODION-1610 is implemented
- // Need to generate insConstraintExpr also
-/*
+ // Generate the update and insert constraint check expressions
+
+ // The attributes for the columns referenced in the constraint
expressions
+ // refer to the source values of the columns. We want to evaluate the
+ // constraints aganst the target values, though. So, there is some
+ // Attributes gymnastics that has to happen to generate them.
--- End diff --
Or at least edited them
---
