Method add

src/alter_table/alter_table.rs:57–61

Adds columns or table constraints, this method overrides the previous value ### Example ``` # use sql_query_builder as sql; let query = sql::AlterTable::new() .add("COLUMN age int not null") .as_string(); # let expected = "ADD COLUMN age int not null"; # assert_eq!(expected, query); ``` Outputs ```sql ADD COLUMN age int not null ``` ### Available on crate feature `postgresql` and `mysql` onl

(mut self, add_exp: &str)

  /// ADD CONSTRAINT login_unique unique(login)
  /// ```
  pub fn add(mut self, add_exp: &str) -> Self {
    let action = AlterTableActionItem(AlterTableOrderedAction::Add, add_exp.trim().to_string());
    push_unique(&mut self._ordered_actions, action);
    self
  }

  /// Defines the name of the table to be altered, this method overrides the previous value
  ///