To create a join index on a table with transaction time, precede the SELECT statement in the join index definition with a CURRENT TRANSACTIONTIME or NONSEQUENCED TRANSACTIONTIME qualifier. For example:
CREATE JOIN INDEX Policy_Types_JI AS CURRENT TRANSACTIONTIME SELECT Policy_Type, Policy_Duration FROM Policy_Types;
A join index that is current in the transaction-time dimension must project the transaction-time column in the SELECT statement. Here, the Policy_Duration column is the transaction-time column.