Reduced latency query processing

A computer program product comprising:

• a computer readable storage medium readable by one or more processing circuit and storing instructions for execution by one or more processor for performing a method comprising:
• receiving by a primary database system a query statement that references a first table, wherein the primary database system is associated to a first accelerator database system and a second accelerator database system;
• examining latency data that specifies a latency with which a modification to the first table has been replicated into the first accelerator database system and a latency with which a modification to the first table has been replicated into the second accelerator database system, wherein the examining includes examining historical latency data that specifies latencies of a history of replications of modifications of the first table;
• selecting, in dependence on the examining, the first accelerator database system for execution of the query statement;
• and
• routing the query statement to the first accelerator database system for execution in response to the selecting.

A system comprising:

• a memory;
• at least one processor in communication with the memory;
• and
• program instructions executable by one or more processor via the memory to perform a method comprising:
• receiving by a primary database system a query statement that references a first table, wherein the primary database system is associated to a first accelerator database system and a second accelerator database system;
• examining latency data that specifies a latency with which a modification to the first table has been replicated into the first accelerator database system and a latency with which a modification to the first table has been replicated into the second accelerator database system, wherein the examining includes examining historical latency data that specifies latencies of a history of replications of modifications of the first table;
• selecting, in dependence on the examining, the first accelerator database system for execution of the query statement;
• and
• routing the query statement to the first accelerator database system for execution in response to the selecting.