Syntax - Advanced SQL Engine - Teradata Database

CREATE JOIN INDEX [ database_name. | user_name. ] join_index_name
  standard options AS [ temporal_qualifier ] select_statement

temporal_qualifier

{ valid_time_qualifier [ AND transaction_time_qualifier ] |
  transaction_time_qualifier [ AND valid_time_qualifier ]
}

valid_time_qualifier

[ CURRENT | SEQUENCED | NONSEQUENCED ] VALIDTIME

transaction_time_qualifier

{ CURRENT | NONSEQUENCED } TRANSACTIONTIME

database_name

Specifies an optional database name or user name specified if the join index is to be contained in a database or user other than the current database or user.

user_name

join_index_name

Specifies the name given to the join index created by this statement.

standard options

Specifies standard table and join index options that are the same for temporal and nontemporal tables. For information about these options, see SQL Data Definition Language .

CURRENT VALIDTIME

Specifies that the join index is current in valid time.

The select_statement must project the valid-time column in a join index definition that is current in valid time. If the column is a derived period column, the component columns of the derived period column must be projected.

SEQUENCED VALIDTIME

Specifies that the join index is sequenced in valid time.

The select_statement must project the valid-time column in a join index definition that is sequenced in valid time. If the column is a derived period column, the component columns of the derived period column must be projected.

NONSEQUENCED VALIDTIME

Specifies that the join index is nonsequenced in valid time.

AND

Specifies a keyword for specifying both a valid-time qualifier and a transaction-time qualifier. The valid-time and transaction-time qualifiers, if used together, can be specified in any order.

CURRENT TRANSACTIONTIME

Specifies that the join index is current in transaction time.

The select_statement must project the transaction-time column in a join index definition that is current in transaction time. If the column is a derived period column, the component columns of the derived period column must be projected.

NONSEQUENCED TRANSACTIONTIME

Specifies that the join index is nonsequenced in transaction time.

select_statement

Specifies conventional SELECT statement syntax for creating a join index.