add case for time.Time and decimal in bindvars (#327)

go.mod

@@ -3,6 +3,7 @@ module github.com/dolthub/vitess
 go 1.22
 
 require (
+	github.com/shopspring/decimal v1.3.1
 	github.com/stretchr/testify v1.4.0
 	golang.org/x/tools v0.1.9
 	google.golang.org/grpc v1.24.0

go.sum

@@ -20,6 +20,8 @@ github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/shopspring/decimal v1.3.1 h1:2Usl1nmF/WZucqkFZhnfFYxxxu8LG21F6nPQBE5gKV8=
+github.com/shopspring/decimal v1.3.1/go.mod h1:DKyhrW/HYNuLGql+MJL6WCR6knT2jwCFRcu2hWCYk4o=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=

go/sqltypes/bind_variables.go

@@ -21,7 +21,9 @@ import (
 	"errors"
 	"fmt"
 	"strconv"
+	"time"
 
+	"github.com/shopspring/decimal"
 	"google.golang.org/protobuf/proto"
 
 	querypb "github.com/dolthub/vitess/go/vt/proto/query"
@@ -120,6 +122,17 @@ func BuildBindVariable(v interface{}) (*querypb.BindVariable, error) {
 		return Uint64BindVariable(v), nil
 	case float64:
 		return Float64BindVariable(v), nil
+	case decimal.Decimal:
+		return &querypb.BindVariable{
+			Type:   querypb.Type_DECIMAL,
+			Value: []byte(v.String()),
+		}, nil
+	case time.Time:
+		return &querypb.BindVariable{
+			Type:   querypb.Type_TIMESTAMP,
+			Value: []byte(v.String()),
+		}, nil
+	// TODO: somehow support types.Timespan
 	case nil:
 		return NullBindVariable, nil
 	case Value: