plus

infix operator fun <T : Number> ColumnDeclaring<T>.plus(expr: ColumnDeclaring<T>): BinaryExpression<T>(source)
infix operator fun <T : Number> ColumnDeclaring<T>.plus(value: T): BinaryExpression<T>(source)
infix operator fun <T : Number> T.plus(expr: ColumnDeclaring<T>): BinaryExpression<T>(source)

Plus operator, translated to + in SQL.