<init>

ColumnDeclaringExpression(
    expression: ScalarExpression<T>,
    declaredName: String? = null,
    sqlType: SqlType<T> = expression.sqlType,
    isLeafNode: Boolean = false,
    extraProperties: Map<String, Any> = emptyMap())

Column declaring expression, represents the selected columns in a SelectExpression.

For example, select a.name as label from dual, a.name as label is a column declaring.