!--a11y-->
alter_table_statement 
The
SQL statement ALTER TABLE (alter_table_statement) is known in SAP DB, but has different syntax and semantics to Oracle (ALTER TABLE statement).
- The variants PCTFREE, PCTUSED, INITRANS, MAXTRANS, STORAGE, DROP, and ALLOCATE are meaningless in SAP DB and are rejected.
- SAP DB cannot deactivate
constraints. SAP DB therefore ignores the specification of DISABLE.
SAP DB cannot delete any UNIQUE constraints using the DROP clause. The DROP INDEX statement must be used for this instead.
When columns are inserted, SAP DB automatically inserts these columns in all view tables that use the "*" in the <select_list>, in order to identify all columns of the table.
