Abstract: A master database module is on a master computer node. Slave database modules are on slave computer nodes connected to the master computer node via a network. A distributed database includes executable code executed by processors on the master computer node and the slave computer nodes to receive a distributed database query at the master computer node. A query execution plan is prepared at the master computer node. The query execution plan is deployed on the slave computer nodes. The query execution plan is executed on the slave computer nodes. The slave computer nodes each perform a single node query execution analysis to selectively produce a query cancellation command. The query cancellation command is propagated to the master computer node and the slave computer nodes. The query execution plan is cancelled on the master computer node and the slave computer nodes.

Abstract: An apparatus has a processor and a memory connected to the processor. The memory stores instructions executed by the processor to ingest and store a semi-structured document within a database. A template is suggested based upon an evaluation of the semi-structured document. The template includes a context specification of a template path that corresponds to a path within the semi-structured document. The template further includes an index specification characterizing data to be extracted from the semi-structured document. A template selection is received. The template selection is executed to form an index entry for the semi-structured document within an index.