How to use

supportsUnions

method

in

org.teiid.translator.ExecutionFactory

@TranslatorProperty(display="Supports UNION", advanced=true)
@Override
public boolean supportsUnions() {
  if (supportsUnions != null) {
    return supportsUnions;
  }
  return delegate.supportsUnions();
}
public void setSupportsUnions(boolean value) {

tgtCaps.setCapabilitySupport(Capability.QUERY_SUBQUERIES_CORRELATED, srcCaps.supportsCorrelatedSubqueries());
tgtCaps.setCapabilitySupport(Capability.QUERY_SEARCHED_CASE, srcCaps.supportsSearchedCaseExpressions());
tgtCaps.setCapabilitySupport(Capability.QUERY_UNION, srcCaps.supportsUnions());
tgtCaps.setCapabilitySupport(Capability.QUERY_INTERSECT, srcCaps.supportsIntersect());
tgtCaps.setCapabilitySupport(Capability.QUERY_EXCEPT, srcCaps.supportsExcept());
  Assertion.assertTrue(!srcCaps.supportsExcept());
  Assertion.assertTrue(!srcCaps.supportsSelectExpression());
  Assertion.assertTrue(!srcCaps.supportsUnions());
  Assertion.assertTrue(!srcCaps.supportsSelectDistinct());
  Assertion.assertTrue(!srcCaps.supportsGroupBy());

tgtCaps.setCapabilitySupport(Capability.QUERY_SUBQUERIES_CORRELATED, srcCaps.supportsCorrelatedSubqueries());
tgtCaps.setCapabilitySupport(Capability.QUERY_SEARCHED_CASE, srcCaps.supportsSearchedCaseExpressions());
tgtCaps.setCapabilitySupport(Capability.QUERY_UNION, srcCaps.supportsUnions());
tgtCaps.setCapabilitySupport(Capability.QUERY_INTERSECT, srcCaps.supportsIntersect());
tgtCaps.setCapabilitySupport(Capability.QUERY_EXCEPT, srcCaps.supportsExcept());
  Assertion.assertTrue(!srcCaps.supportsExcept());
  Assertion.assertTrue(!srcCaps.supportsSelectExpression());
  Assertion.assertTrue(!srcCaps.supportsUnions());
  Assertion.assertTrue(!srcCaps.supportsSelectDistinct());
  Assertion.assertTrue(!srcCaps.supportsGroupBy());

tgtCaps.setCapabilitySupport(Capability.QUERY_SUBQUERIES_CORRELATED, srcCaps.supportsCorrelatedSubqueries());
tgtCaps.setCapabilitySupport(Capability.QUERY_SEARCHED_CASE, srcCaps.supportsSearchedCaseExpressions());
tgtCaps.setCapabilitySupport(Capability.QUERY_UNION, srcCaps.supportsUnions());
tgtCaps.setCapabilitySupport(Capability.QUERY_INTERSECT, srcCaps.supportsIntersect());
tgtCaps.setCapabilitySupport(Capability.QUERY_EXCEPT, srcCaps.supportsExcept());
  Assertion.assertTrue(!srcCaps.supportsExcept());
  Assertion.assertTrue(!srcCaps.supportsSelectExpression());
  Assertion.assertTrue(!srcCaps.supportsUnions());
  Assertion.assertTrue(!srcCaps.supportsSelectDistinct());
  Assertion.assertTrue(!srcCaps.supportsGroupBy());