func (c *conn) ShowColumns(p *parser.ShowColumns, args []driver.Value) (*rows, error) {
desc, err := c.getTableDesc(p.Name)
if err != nil {
return nil, err
}
schema := structured.TableSchemaFromDesc(*desc)
// TODO(pmattis): This output doesn't match up with MySQL. Should it?
r := &rows{
columns: []string{"Field", "Type", "Null"},
rows: make([]row, len(schema.Columns)),
pos: -1,
}
for i, col := range schema.Columns {
t := make(row, len(r.columns))
t[0] = col.Name
t[1] = col.Type.SQLString()
t[2] = col.Nullable
r.rows[i] = t
}
return r, nil
}
func (c *conn) ShowIndex(p *parser.ShowIndex, args []driver.Value) (*rows, error) {
desc, err := c.getTableDesc(p.Table)
if err != nil {
return nil, err
}
schema := structured.TableSchemaFromDesc(*desc)
// TODO(pmattis): This output doesn't match up with MySQL. Should it?
r := &rows{
columns: []string{"Table", "Name", "Unique", "Seq", "Column"},
}
for _, index := range schema.Indexes {
for j, col := range index.ColumnNames {
t := make(row, len(r.columns))
t[0] = p.Table.Name
t[1] = index.Name
t[2] = index.Unique
t[3] = j + 1
t[4] = col
r.rows = append(r.rows, t)
}
}
return r, nil
}
// DescribeTable retrieves the table schema for the specified table. Path has
// the form "<namespace>.<table>".
func (db *DB) DescribeTable(path string) (*structured.TableSchema, error) {
desc, err := db.getTableDesc(path)
if err != nil {
return nil, err
}
schema := structured.TableSchemaFromDesc(*desc)
return &schema, nil
}