forked from src-d/go-mysql-server
/
unresolved.go
56 lines (43 loc) · 1.42 KB
/
unresolved.go
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package plan
import (
"fmt"
"github.com/src-d/go-mysql-server/sql"
errors "gopkg.in/src-d/go-errors.v1"
)
// ErrUnresolvedTable is thrown when a table cannot be resolved
var ErrUnresolvedTable = errors.NewKind("unresolved table")
// UnresolvedTable is a table that has not been resolved yet but whose name is known.
type UnresolvedTable struct {
name string
Database string
}
// NewUnresolvedTable creates a new Unresolved table.
func NewUnresolvedTable(name, db string) *UnresolvedTable {
return &UnresolvedTable{name, db}
}
// Name implements the Nameable interface.
func (t *UnresolvedTable) Name() string {
return t.name
}
// Resolved implements the Resolvable interface.
func (*UnresolvedTable) Resolved() bool {
return false
}
// Children implements the Node interface.
func (*UnresolvedTable) Children() []sql.Node { return nil }
// Schema implements the Node interface.
func (*UnresolvedTable) Schema() sql.Schema { return nil }
// RowIter implements the RowIter interface.
func (*UnresolvedTable) RowIter(ctx *sql.Context) (sql.RowIter, error) {
return nil, ErrUnresolvedTable.New()
}
// WithChildren implements the Node interface.
func (t *UnresolvedTable) WithChildren(children ...sql.Node) (sql.Node, error) {
if len(children) != 0 {
return nil, sql.ErrInvalidChildrenNumber.New(t, len(children), 0)
}
return t, nil
}
func (t UnresolvedTable) String() string {
return fmt.Sprintf("UnresolvedTable(%s)", t.name)
}