upgrade vitess to v1.4.0

Signed-off-by: kuba-- <kuba@sourced.tech>

Author: kuba--

engine_test.go

@@ -65,6 +65,10 @@ var queries = []struct {
 		"SELECT substring(s, 2, 3) FROM mytable",
 		[]sql.Row{{"irs"}, {"eco"}, {"hir"}},
 	},
+	{
+		`SELECT substring("foo", 2, 2)`,
+		[]sql.Row{{"oo"}},
+	},
 	{
 		"SELECT YEAR('2007-12-11') FROM mytable",
 		[]sql.Row{{int32(2007)}, {int32(2007)}, {int32(2007)}},
@@ -137,6 +141,12 @@ var queries = []struct {
 			{"first", "irst", "rst"},
 		},
 	},
+	{
+		`SELECT substring("first", 1), substring("second", 2), substring("third", 3)`,
+		[]sql.Row{
+			{"first", "econd", "ird"},
+		},
+	},
 	{
 		"SELECT substring(s2, -1), substring(s2, -2), substring(s2, -3) FROM othertable ORDER BY i2",
 		[]sql.Row{
@@ -145,7 +155,12 @@ var queries = []struct {
 			{"t", "st", "rst"},
 		},
 	},
-
+	{
+		`SELECT substring("first", -1), substring("second", -2), substring("third", -3)`,
+		[]sql.Row{
+			{"t", "nd", "ird"},
+		},
+	},
 	{
 		"SELECT s FROM mytable INNER JOIN othertable " +
 			"ON substring(s2, 1, 2) != '' AND i = i2",

go.mod

@@ -10,5 +10,5 @@ require (
 	golang.org/x/net v0.0.0-20181029044818-c44066c5c816 // indirect
 	google.golang.org/grpc v1.16.0 // indirect
 	gopkg.in/src-d/go-errors.v1 v1.0.0
-	gopkg.in/src-d/go-vitess.v1 v1.3.0
+	gopkg.in/src-d/go-vitess.v1 v1.4.0
 )

sql/parse/parse.go

@@ -318,10 +318,7 @@ func convertCreateTable(c *sqlparser.DDL) (sql.Node, error) {
 	}
 
 	return plan.NewCreateTable(
-		sql.UnresolvedDatabase(""),
-		c.NewName.Name.String(),
-		schema,
-	), nil
+		sql.UnresolvedDatabase(""), c.Table.Name.String(), schema), nil
 }
 
 func convertInsert(ctx *sql.Context, i *sqlparser.Insert) (sql.Node, error) {
@@ -656,7 +653,15 @@ func exprToExpression(e sqlparser.Expr) (sql.Expression, error) {
 	case *sqlparser.Default:
 		return expression.NewDefaultColumn(v.ColName), nil
 	case *sqlparser.SubstrExpr:
-		name, err := exprToExpression(v.Name)
+		var (
+			name sql.Expression
+			err  error
+		)
+		if v.Name != nil {
+			name, err = exprToExpression(v.Name)
+		} else {
+			name, err = exprToExpression(v.StrVal)
+		}
 		if err != nil {
 			return nil, err
 		}