Ingres 9.2 Migration Guide - Actian

New SQL FunctionalityParallel Index CreationA new variation of the CREATE INDEX statement allows the user to createmultiple secondary indexes with a single pass through the base table. After therequired base table columns are extracted, the indexes are created in parallel,each one using an independent worker thread. For additional performance, anynecessary sorting is performed using the new parallel sort capability.The new syntax is:CREATE INDEX (index-spec), (index-spec), ...where an index-spec looks similar to the original CREATE INDEX statement:(index-name ON base-table (column-list) WITH with-clause)SELECT EnhancementThe SELECT statement now allows the FIRST n clause in the result list. Thisclause limits the result returned to the user to the first N rows.Bit-wise Operator SupportThe following functions have been added to Ingres II 2.5 to provide support forbit-wise operations:bit_addLogical "add" of two byte operandsbit_andLogical "and" of two byte operandsbit_notbit_orLogical "not" of two byte operandsLogical "or" of two byte operandsbit_xorLogical "exclusive or" of two byte operandsFor all of these bit functions, all operations proceed right to left. The shorter oftwo operands is padded with hex zeroes on the left. The result is a byte fieldequal in size to the longer operand.216 Migration Guide