modify basic rule

    | GENERATED (ALWAYS | BY DEFAULT) AS IDENTITY (LP_ sequenceOptions RP_)?

    | UNIQUE indexParameters

    | primaryKey indexParameters

    | REFERENCES tableName (LP_ columnName RP_)? (MATCH FULL | MATCH PARTIAL | MATCH SIMPLE)?(ON DELETE action)? foreignKeyOnAction*

    | REFERENCES tableName columnNames? (MATCH FULL | MATCH PARTIAL | MATCH SIMPLE)? (ON (DELETE | UPDATE) action)*

    ;

checkOption

    | CYCLE

    | NO CYCLE

    | CACHE NUMBER_

    | OWNED BY

    ;

indexParameters

    : (USING INDEX TABLESPACE ignoredIdentifier_)?

    | INCLUDE columnNames

    | WITH

    ;

action

    : NO ACTION | RESTRICT | CASCADE | SET (NULL | DEFAULT)

    ;

foreignKeyOnAction

    : ON (UPDATE foreignKeyOn | DELETE foreignKeyOn)

    ;

foreignKeyOn

    : RESTRICT | CASCADE | SET NULL | NO ACTION | SET DEFAULT

    ;

constraintOptionalParam

    : (NOT? DEFERRABLE)? (INITIALLY (DEFERRED | IMMEDIATE))?

    ;