public interface QueryEngine
Modifier and Type | Method and Description |
---|---|
QueryContext |
createQueryContext(ExecutionContext context,
RepositoryCache repositoryCache,
Set<String> workspaceNames,
Map<String,NodeCache> overriddenNodeCachesByWorkspaceName,
Schemata schemata,
RepositoryIndexes indexDefns,
NodeTypes nodeTypes,
BufferManager bufferManager,
PlanHints hints,
Map<String,Object> variables)
Create a new context for query execution.
|
QueryResults |
execute(QueryContext context,
QueryCommand query)
Execute the supplied query by planning, optimizing, and then processing it.
|
void |
shutdown()
Signal that the engine is no longer needed and should clean up and/or close any resources.
|
QueryResults execute(QueryContext context, QueryCommand query) throws QueryCancelledException, RepositoryException
context
- the context in which the query should be executedquery
- the query that is to be executedIllegalArgumentException
- if the context or query references are nullQueryCancelledException
- if the query was cancelledRepositoryException
- if there was a problem executing the queryQueryContext createQueryContext(ExecutionContext context, RepositoryCache repositoryCache, Set<String> workspaceNames, Map<String,NodeCache> overriddenNodeCachesByWorkspaceName, Schemata schemata, RepositoryIndexes indexDefns, NodeTypes nodeTypes, BufferManager bufferManager, PlanHints hints, Map<String,Object> variables)
context
- the context in which the query is being executed; may not be nullrepositoryCache
- the repository cache that should be used to load results; may be null if no results are to be loadedworkspaceNames
- the name of each workspace to be queried, or an empty set if all the workspaces should be queried;
may not be nulloverriddenNodeCachesByWorkspaceName
- the NodeCache instances that should be used to load results, which will be used
instead of the RepositoryCache's NodeCache for a given workspace name; may be null or emptyschemata
- the schemataindexDefns
- the definitions for the currently-defined indexes; never nullnodeTypes
- the snapshot of node types; may not be nullbufferManager
- the buffer manager; may not be nullhints
- the hints, or null if there are no hintsvariables
- the mapping of variables and values, or null if there are no such variablesIllegalArgumentException
- if the context, workspace name, or schemata are nullvoid shutdown()
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