- Tables can have up to 32 secondary and join indexes.
These 32 indexes can be any combination of secondary and join indexes, including the system-defined secondary indexes used to implement PRIMARY KEY and UNIQUE constraints.
Each multicolumn NUSI that specifies an ORDER BY clause counts as two consecutive indexes in this calculation.
- Index columns cannot have XML, BLOB, CLOB, JSON, ARRAY, or VARRAY.
- Join index columns can have Period data types and can include expressions composed of system and user-defined functions and methods, including the use of the BEGIN, END, and P_INTERSECT built-in functions on a Period data type column to compose an expression in the projection list and a single-table condition in its WHERE or ON clauses.
- Join indexes can be created on a row-level security-protected table only if all of the following criteria are met.
- The join index references a maximum of one row-level security-protected table.
- All of the row-level security constraint columns in the indexed table are included in the join index definition.