forked from src-d/go-mysql-server
/
ddl.go
69 lines (56 loc) · 1.7 KB
/
ddl.go
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package plan
import (
"gopkg.in/src-d/go-errors.v1"
"gopkg.in/src-d/go-mysql-server.v0/sql"
)
// ErrCreateTable is thrown when the database doesn't support table creation
var ErrCreateTable = errors.NewKind("tables cannot be created on database %s")
// CreateTable is a node describing the creation of some table.
type CreateTable struct {
Database sql.Database
name string
schema sql.Schema
}
// NewCreateTable creates a new CreateTable node
func NewCreateTable(db sql.Database, name string, schema sql.Schema) *CreateTable {
for _, s := range schema {
s.Source = name
}
return &CreateTable{
Database: db,
name: name,
schema: schema,
}
}
// Resolved implements the Resolvable interface.
func (c *CreateTable) Resolved() bool {
_, ok := c.Database.(*sql.UnresolvedDatabase)
return !ok
}
// RowIter implements the Node interface.
func (c *CreateTable) RowIter(s *sql.Context) (sql.RowIter, error) {
d, ok := c.Database.(sql.Alterable)
if !ok {
return nil, ErrCreateTable.New(c.Database.Name())
}
return sql.RowsToRowIter(), d.Create(c.name, c.schema)
}
// Schema implements the Node interface.
func (c *CreateTable) Schema() sql.Schema {
return sql.Schema{}
}
// Children implements the Node interface.
func (c *CreateTable) Children() []sql.Node {
return nil
}
// TransformUp implements the Transformable interface.
func (c *CreateTable) TransformUp(f sql.TransformNodeFunc) (sql.Node, error) {
return f(NewCreateTable(c.Database, c.name, c.schema))
}
// TransformExpressionsUp implements the Transformable interface.
func (c *CreateTable) TransformExpressionsUp(f sql.TransformExprFunc) (sql.Node, error) {
return c, nil
}
func (c *CreateTable) String() string {
return "CreateTable"
}