panic on SELECT DISTINCT(1, 2);

[mcuadros]

ERRO[1415] mysql_server caught panic:
unable to convert tuple type to SQL
/home/mcuadros/workspace/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/type.go:690 (0x7cd7bb)
        com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql.tupleT.SQL: panic("unable to convert tuple type to SQL")
/home/mcuadros/workspace/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/server/handler.go:224 (0xc94c19)
        com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/server.rowToSQL: o[i] = s[i].Type.SQL(v)
/home/mcuadros/workspace/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/server/handler.go:137 (0xc941e8)
        com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/server.(*Handler).ComQuery: r.Rows = append(r.Rows, rowToSQL(schema, row))
/home/mcuadros/workspace/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-vitess.v1/mysql/conn.go:730 (0xb9f7f2)
        com/src-d/gitbase/vendor/gopkg.in/src-d/go-vitess.v1/mysql.(*Conn).handleNextCommand: err := handler.ComQuery(c, query, func(qr *sqltypes.Result) error {
/home/mcuadros/workspace/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-vitess.v1/mysql/server.go:430 (0xbb0d5f)
        com/src-d/gitbase/vendor/gopkg.in/src-d/go-vitess.v1/mysql.(*Listener).handle: err := c.handleNextCommand(l.handler)
/usr/lib/go/src/runtime/asm_amd64.s:1337 (0x45c1e0)
        goexit: BYTE    $0x90   // NOP

Using truck at ca3ad0d

[erizocosmico]

Panic should not happen, but that's not a valid MySQL query.

[juanjux]

Yes, should be SELECT DISTINCT 1, 2, as formulated is trying to do a DISTINCT on a tuple.

[mcuadros]

I know is not a valid query, but the server should never panic :D