message: Move import `ColumnOption` used only by `alter-table` feature
diff: @@ -235,16 +235,15 @@ impl ToSql for Assignment {
  #[cfg(test)]
  mod tests {
  #[cfg(feature = "alter-table")]
  - use crate::ast::AlterTableOperation;
  + use crate::ast::{AlterTableOperation, ColumnOption};
  #[cfg(feature = "index")]
  use crate::ast::OrderByExpr;
  use {
  crate::ast::{
  - Assignment, AstLiteral, BinaryOperator, ColumnDef, ColumnOption, DataType, Expr, Query,
  - Select, SelectItem, SetExpr, Statement, TableFactor, TableWithJoins, ToSql, Values,
  - Variable,
  + Assignment, AstLiteral, BinaryOperator, ColumnDef, DataType, Expr, Query, Select,
  + SelectItem, SetExpr, Statement, TableFactor, TableWithJoins, ToSql, Values, Variable,
  },
  bigdecimal::BigDecimal,
  std::str::FromStr,
  