diff --git a/db/db.go b/db/db.go
index e10d850b..7809e3bf 100644
--- a/db/db.go
+++ b/db/db.go
@@ -75,23 +75,6 @@ type PoolStats struct {
 	MaxLifetimeClosed  int64         `json:"max_lifetime_closed"`
 }
 
-// Result represents the outcome of an operation that changes rows.
-type Result struct {
-	LastInsertID int64   `json:"last_insert_id,omitempty"`
-	RowsAffected int64   `json:"rows_affected,omitempty"`
-	Error        string  `json:"error,omitempty"`
-	Time         float64 `json:"time,omitempty"`
-}
-
-// Rows represents the outcome of an operation that returns query data.
-type Rows struct {
-	Columns []string        `json:"columns,omitempty"`
-	Types   []string        `json:"types,omitempty"`
-	Values  [][]interface{} `json:"values,omitempty"`
-	Error   string          `json:"error,omitempty"`
-	Time    float64         `json:"time,omitempty"`
-}
-
 // Open opens a file-based database, creating it if it does not exist.
 func Open(dbPath string, fkEnabled bool) (*DB, error) {
 	rwDSN := fmt.Sprintf("file:%s?_fk=%s", dbPath, strconv.FormatBool(fkEnabled))
@@ -313,7 +296,7 @@ func (db *DB) Size() (int64, error) {
 		return 0, err
 	}
 
-	return rows[0].Values[0][0].(int64), nil
+	return rows[0].Values[0].Parameters[0].GetI(), nil
 }
 
 // FileSize returns the size of the SQLite file on disk. If running in
@@ -341,14 +324,10 @@ func (db *DB) CompileOptions() ([]string, error) {
 
 	copts := make([]string, len(res[0].Values))
 	for i := range copts {
-		if len(res[0].Values[i]) != 1 {
+		if len(res[0].Values[i].Parameters) != 1 {
 			return nil, fmt.Errorf("compile options values wrong size (%d)", len(res))
 		}
-		if co, ok := res[0].Values[i][0].(string); !ok {
-			copts[i] = "not string!"
-		} else {
-			copts[i] = co
-		}
+		copts[i] = res[0].Values[i].Parameters[0].GetS()
 	}
 	return copts, nil
 }
@@ -372,7 +351,7 @@ func (db *DB) ConnectionPoolStats(sqlDB *sql.DB) *PoolStats {
 
 // ExecuteStringStmt executes a single query that modifies the database. This is
 // primarily a convenience function.
-func (db *DB) ExecuteStringStmt(query string) ([]*Result, error) {
+func (db *DB) ExecuteStringStmt(query string) ([]*command.ExecuteResult, error) {
 	r := &command.Request{
 		Statements: []*command.Statement{
 			{
@@ -384,7 +363,7 @@ func (db *DB) ExecuteStringStmt(query string) ([]*Result, error) {
 }
 
 // Execute executes queries that modify the database.
-func (db *DB) Execute(req *command.Request, xTime bool) ([]*Result, error) {
+func (db *DB) Execute(req *command.Request, xTime bool) ([]*command.ExecuteResult, error) {
 	stats.Add(numExecutions, int64(len(req.Statements)))
 
 	conn, err := db.rwDB.Conn(context.Background())
@@ -415,11 +394,11 @@ func (db *DB) Execute(req *command.Request, xTime bool) ([]*Result, error) {
 		execer = conn
 	}
 
-	var allResults []*Result
+	var allResults []*command.ExecuteResult
 
 	// handleError sets the error field on the given result. It returns
 	// whether the caller should continue processing or break.
-	handleError := func(result *Result, err error) bool {
+	handleError := func(result *command.ExecuteResult, err error) bool {
 		stats.Add(numExecutionErrors, 1)
 		result.Error = err.Error()
 		allResults = append(allResults, result)
@@ -438,7 +417,7 @@ func (db *DB) Execute(req *command.Request, xTime bool) ([]*Result, error) {
 			continue
 		}
 
-		result := &Result{}
+		result := &command.ExecuteResult{}
 		start := time.Now()
 
 		parameters, err := parametersToValues(stmt.Parameters)
@@ -468,7 +447,7 @@ func (db *DB) Execute(req *command.Request, xTime bool) ([]*Result, error) {
 			}
 			break
 		}
-		result.LastInsertID = lid
+		result.LastInsertId = lid
 
 		ra, err := r.RowsAffected()
 		if err != nil {
@@ -491,7 +470,7 @@ func (db *DB) Execute(req *command.Request, xTime bool) ([]*Result, error) {
 }
 
 // QueryStringStmt executes a single query that return rows, but don't modify database.
-func (db *DB) QueryStringStmt(query string) ([]*Rows, error) {
+func (db *DB) QueryStringStmt(query string) ([]*command.QueryRows, error) {
 	r := &command.Request{
 		Statements: []*command.Statement{
 			{
@@ -503,7 +482,7 @@ func (db *DB) QueryStringStmt(query string) ([]*Rows, error) {
 }
 
 // Query executes queries that return rows, but don't modify the database.
-func (db *DB) Query(req *command.Request, xTime bool) ([]*Rows, error) {
+func (db *DB) Query(req *command.Request, xTime bool) ([]*command.QueryRows, error) {
 	stats.Add(numQueries, int64(len(req.Statements)))
 	conn, err := db.roDB.Conn(context.Background())
 	if err != nil {
@@ -513,7 +492,7 @@ func (db *DB) Query(req *command.Request, xTime bool) ([]*Rows, error) {
 	return db.queryWithConn(req, xTime, conn)
 }
 
-func (db *DB) queryWithConn(req *command.Request, xTime bool, conn *sql.Conn) ([]*Rows, error) {
+func (db *DB) queryWithConn(req *command.Request, xTime bool, conn *sql.Conn) ([]*command.QueryRows, error) {
 	var err error
 	type Queryer interface {
 		QueryContext(ctx context.Context, query string, args ...interface{}) (*sql.Rows, error)
@@ -533,14 +512,14 @@ func (db *DB) queryWithConn(req *command.Request, xTime bool, conn *sql.Conn) ([
 		queryer = conn
 	}
 
-	var allRows []*Rows
+	var allRows []*command.QueryRows
 	for _, stmt := range req.Statements {
 		sql := stmt.Sql
 		if sql == "" {
 			continue
 		}
 
-		rows := &Rows{}
+		rows := &command.QueryRows{}
 		start := time.Now()
 
 		parameters, err := parametersToValues(stmt.Parameters)
@@ -583,8 +562,9 @@ func (db *DB) queryWithConn(req *command.Request, xTime bool, conn *sql.Conn) ([
 			if err := rs.Scan(ptrs...); err != nil {
 				return nil, err
 			}
-			values := normalizeRowValues(dest, xTypes)
-			rows.Values = append(rows.Values, values)
+			rows.Values = append(rows.Values, &command.Values{
+				Parameters: normalizeRowValues(dest, xTypes),
+			})
 		}
 
 		// Check for errors from iterating over rows.
@@ -696,7 +676,7 @@ func (db *DB) Dump(w io.Writer) error {
 	}
 	row := rows[0]
 	for _, v := range row.Values {
-		table := v[0].(string)
+		table := v.Parameters[0].GetS()
 		var stmt string
 
 		if table == "sqlite_sequence" {
@@ -706,7 +686,7 @@ func (db *DB) Dump(w io.Writer) error {
 		} else if strings.HasPrefix(table, "sqlite_") {
 			continue
 		} else {
-			stmt = v[2].(string)
+			stmt = v.Parameters[2].GetS()
 		}
 
 		if _, err := w.Write([]byte(fmt.Sprintf("%s;\n", stmt))); err != nil {
@@ -721,7 +701,7 @@ func (db *DB) Dump(w io.Writer) error {
 		}
 		var columnNames []string
 		for _, w := range r[0].Values {
-			columnNames = append(columnNames, fmt.Sprintf(`'||quote("%s")||'`, w[1].(string)))
+			columnNames = append(columnNames, fmt.Sprintf(`'||quote("%s")||'`, w.Parameters[1].GetS()))
 		}
 
 		query = fmt.Sprintf(`SELECT 'INSERT INTO "%s" VALUES(%s)' FROM "%s";`,
@@ -734,7 +714,7 @@ func (db *DB) Dump(w io.Writer) error {
 			return err
 		}
 		for _, x := range r[0].Values {
-			y := fmt.Sprintf("%s;\n", x[0].(string))
+			y := fmt.Sprintf("%s;\n", x.Parameters[0].GetS())
 			if _, err := w.Write([]byte(y)); err != nil {
 				return err
 			}
@@ -750,7 +730,7 @@ func (db *DB) Dump(w io.Writer) error {
 	}
 	row = rows[0]
 	for _, v := range row.Values {
-		if _, err := w.Write([]byte(fmt.Sprintf("%s;\n", v[2]))); err != nil {
+		if _, err := w.Write([]byte(fmt.Sprintf("%s;\n", v.Parameters[2].GetS()))); err != nil {
 			return err
 		}
 	}
@@ -839,16 +819,50 @@ func parametersToValues(parameters []*command.Parameter) ([]interface{}, error)
 // Text values come over (from sqlite-go) as []byte instead of strings
 // for some reason, so we have explicitly convert (but only when type
 // is "text" so we don't affect BLOB types)
-func normalizeRowValues(row []interface{}, types []string) []interface{} {
+func normalizeRowValues(row []interface{}, types []string) []*command.Parameter {
+	values := make([]*command.Parameter, len(types))
 	for i, v := range row {
-		if isTextType(types[i]) {
-			val, ok := v.([]byte)
-			if ok {
-				row[i] = string(val)
+		switch val := v.(type) {
+		case int:
+		case int64:
+			values[i] = &command.Parameter{
+				Value: &command.Parameter_I{
+					I: val,
+				},
+			}
+		case float64:
+			values[i] = &command.Parameter{
+				Value: &command.Parameter_D{
+					D: val,
+				},
+			}
+		case bool:
+			values[i] = &command.Parameter{
+				Value: &command.Parameter_B{
+					B: val,
+				},
+			}
+		case string:
+			values[i] = &command.Parameter{
+				Value: &command.Parameter_S{
+					S: val,
+				},
+			}
+		case []byte:
+			if isTextType(types[i]) {
+				values[i].Value = &command.Parameter_S{
+					S: string(val),
+				}
+			} else {
+				values[i] = &command.Parameter{
+					Value: &command.Parameter_Y{
+						Y: val,
+					},
+				}
 			}
 		}
 	}
-	return row
+	return values
 }
 
 // isTextType returns whether the given type has a SQLite text affinity.
diff --git a/db/db_test.go b/db/db_test.go
index ca880dfc..7888b429 100644
--- a/db/db_test.go
+++ b/db/db_test.go
@@ -1,7 +1,6 @@
 package db
 
 import (
-	"encoding/json"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -12,6 +11,7 @@ import (
 	"time"
 
 	"github.com/rqlite/rqlite/command"
+	"github.com/rqlite/rqlite/command/encoding"
 	"github.com/rqlite/rqlite/testdata/chinook"
 )
 
@@ -1529,9 +1529,9 @@ func mustQuery(db *DB, stmt string) {
 }
 
 func asJSON(v interface{}) string {
-	b, err := json.Marshal(v)
+	b, err := encoding.JSONMarshal(v)
 	if err != nil {
-		panic("failed to JSON marshal value")
+		panic(fmt.Sprintf("failed to JSON marshal value: %s", err.Error()))
 	}
 	return string(b)
 }