Allow literals whose type is not NULLTYPE to be NULL. (Might reconsider later...)
Allow literals whose type is not NULLTYPE to be NULL. (Might reconsider later...)

vlsi/calcite,sreev/incubator-calcite,jcamachor/calcite,hsuanyi/incubator-calcite,hsuanyi/optiq,jcamachor/calcite,apache/calcite,apache/calcite-avatica,datametica/calcite,googleinterns/calcite,mehant/incubator-calcite,yeongwei/incubator-calcite,joshelser/calcite-avatica,datametica/calcite,sreev/incubator-calcite,dindin5258/calcite,apache/calcite,adeshr/incubator-calcite,mapr/incubator-calcite,vlsi/incubator-calcite,vlsi/calcite,jinfengni/optiq,jinfengni/incubator-optiq,julianhyde/optiq,apache/calcite,vlsi/calcite,looker-open-source/calcite,amoghmargoor/incubator-calcite,glimpseio/incubator-calcite,joshelser/incubator-calcite,dindin5258/calcite,joshelser/incubator-calcite,arina-ielchiieva/calcite,googleinterns/calcite,adeshr/incubator-calcite,looker-open-source/calcite,apache/calcite-avatica,adeshr/incubator-calcite,minji-kim/calcite,dindin5258/calcite,amansinha100/incubator-calcite,julianhyde/calcite,YrAuYong/incubator-calcite,apache/calcite,dindin5258/calcite,b-slim/calcite,vlsi/incubator-calcite,googleinterns/calcite,apache/calcite,looker-open-source/calcite-avatica,xhoong/incubator-calcite,googleinterns/calcite,sudheeshkatkam/incubator-calcite,minji-kim/calcite,joshelser/calcite-avatica,arina-ielchiieva/calcite,b-slim/calcite,datametica/calcite,YrAuYong/incubator-calcite,joshelser/incubator-calcite,dindin5258/calcite,b-slim/calcite,adeshr/incubator-calcite,jcamachor/calcite,wanglan/calcite,julianhyde/calcite,b-slim/calcite,xhoong/incubator-calcite,looker-open-source/calcite-avatica,jcamachor/calcite,looker-open-source/calcite-avatica,minji-kim/calcite,sudheeshkatkam/incubator-calcite,arina-ielchiieva/calcite,hsuanyi/incubator-calcite,yeongwei/incubator-calcite,datametica/calcite,julianhyde/calcite,looker-open-source/calcite-avatica,sreev/incubator-calcite,datametica/calcite,hsuanyi/incubator-calcite,apache/calcite-avatica,looker-open-source/calcite,julianhyde/calcite,googleinterns/calcite,julianhyde/calcite,wanglan/calcite,arina-ielchiieva/calcite,sudheeshkatkam/incubator-calcite,vlsi/calcite,sudheeshkatkam/incubator-calcite,glimpseio/incubator-calcite,mehant/incubator-calcite,apache/calcite-avatica,xhoong/incubator-calcite,arina-ielchiieva/calcite,xhoong/incubator-calcite,apache/calcite-avatica,julianhyde/optiq,amoghmargoor/incubator-calcite,devth/calcite,yeongwei/incubator-calcite,looker-open-source/calcite,minji-kim/calcite,YrAuYong/incubator-calcite,googleinterns/calcite,wanglan/calcite,mprudhom/incubator-optiq,amoghmargoor/incubator-calcite,looker-open-source/calcite,joshelser/calcite-avatica,joshelser/incubator-calcite,jinfengni/incubator-optiq,jcamachor/calcite,minji-kim/calcite,julianhyde/calcite,jinfengni/optiq,mprudhom/incubator-optiq,glimpseio/incubator-calcite,dindin5258/calcite,hsuanyi/optiq,apache/calcite,wanglan/calcite,YrAuYong/incubator-calcite,yeongwei/incubator-calcite,looker-open-source/calcite,amoghmargoor/incubator-calcite,glimpseio/incubator-calcite,looker-open-source/calcite-avatica,vlsi/calcite,jcamachor/calcite,datametica/calcite,amansinha100/incubator-calcite,vlsi/calcite,sreev/incubator-calcite,b-slim/calcite,hsuanyi/incubator-calcite,devth/calcite,mapr/incubator-calcite