Multiplex Transactions

Multiplex transactions that modify shared objects behave according to certain rules.

• Multiplex Transactions Overview
  Transactions are either local or global.
• DML Commands
  In IQ 15.0, global transactions can be run from the coordinator and any write server. DML commands that modify tables in the shared IQ store are global DML commands. Any transaction that contains a global DML command becomes a global transaction.
• DDL Commands
  Command type and object type affect the scope of Data Definition Language (DDL) commands in a multiplex.
• Dynamic Collisions
  A dynamic collision occurs when a schema change is committed on a table, procedure, function, or view while a secondary server is querying the same object. The collision results from the TLV replay of shared IQ object schema updates.