[teiid-issues] [JBoss JIRA] (TEIID-1543) Add a query hint to limit the number of concurrent source queries

Add a query hint to limit the number of concurrent source queries ----------------------------------------------------------------- Key: TEIID-1543 URL: https://issues.jboss.org/browse/TEIID-1543 Project: Teiid Issue Type: Sub-task Components: Query Engine Affects Versions: 7.4 Reporter: Steven Hawkins Assignee: Steven Hawkins Fix For: 8.1 We would like a new query hint to limit the number of parallel executions of union members. This is useful in two situations: 1. When the queries are expensive, but the overall union contains a limit that is most likely to be fulfilled by the first member of the union 2. When the queries are backed by a common resource which may be overloaded by multiple queries The addition of a hint would make this manageable by the client; perhaps something like "/*+ parallel=2*/"?