code: func (c *ColumnMap) SetSqlCreate(s string) *ColumnMap {
  	c.createSql = s
  	return c
  }
docs: // SetSqlCreate overrides the default create statement used when this column
  // is created by CreateTable.  This will override all other options (like
  // SetMaxSize, SetSqlType, etc).  To unset, call with the empty string.