Revert "Removing dead code"

This reverts commit b92add82cc.

go/libraries/doltcore/table/typed/noms/range_reader.go

@@ -20,6 +20,8 @@ import (
 	"fmt"
 	"io"
 
+	"github.com/dolthub/go-mysql-server/sql"
+
 	"github.com/dolthub/dolt/go/libraries/doltcore/row"
 	"github.com/dolthub/dolt/go/libraries/doltcore/schema"
 	"github.com/dolthub/dolt/go/store/types"
@@ -253,6 +255,43 @@ func (nrr *NomsRangeReader) Close(ctx context.Context) error {
 	return nil
 }
 
+// SqlRowFromTuples constructs a go-mysql-server/sql.Row from Noms tuples.
+func SqlRowFromTuples(sch schema.Schema, key, val types.Tuple) (sql.Row, error) {
+	allCols := sch.GetAllCols()
+	colVals := make(sql.Row, allCols.Size())
+
+	keySl, err := key.AsSlice()
+	if err != nil {
+		return nil, err
+	}
+	valSl, err := val.AsSlice()
+	if err != nil {
+		return nil, err
+	}
+
+	for _, sl := range []types.TupleValueSlice{keySl, valSl} {
+		var convErr error
+		err := row.IterPkTuple(sl, func(tag uint64, val types.Value) (stop bool, err error) {
+			if idx, ok := allCols.TagToIdx[tag]; ok {
+				col := allCols.GetByIndex(idx)
+				colVals[idx], convErr = col.TypeInfo.ConvertNomsValueToValue(val)
+
+				if convErr != nil {
+					return false, err
+				}
+			}
+
+			return false, nil
+		})
+
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return sql.NewRow(colVals...), nil
+}
+
 type CardinalityCounter struct {
 	key   *types.Tuple
 	value *types.Tuple