feat: Speed up field lookups in DFSchema#201

MazterQyou merged 1 commit intocubesql-3-04-2022cube-js/arrow-datafusion:cubesql-3-04-2022from

cubesql/dfschema-fast-lookupcube-js/arrow-datafusion:cubesql/dfschema-fast-lookupCopy head branch name to clipboard