Release 0.4.0.
Release 0.4.0.

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