Red Hat Training

A Red Hat training course is available for Red Hat JBoss Data Virtualization

13.5. Base Execution Properties

The following execution properties are shared by all translators.

Table 13.1. Base Execution Properties

Name Description Default
Immutable Set to true to indicate that the source never changes. false
RequiresCriteria Set to true to indicate that source SELECT/UPDATE/DELETE queries require a WHERE clause. false
SupportsOrderBy Set to true to indicate that the ORDER BY clause is supported. true
SupportsOuterJoins Set to true to indicate that OUTER JOINs are supported. true
SupportsFullOuterJoins If outer joins are supported, true indicates that FULL OUTER JOINs are supported. true
SupportsInnerJoins Set to true to indicate that INNER JOINs are supported. true
SupportedJoinCriteria If joins are supported, defines what criteria may be used as the join criteria. May be one of (ANY, THETA, EQUI, or KEY). ANY
MaxInCriteriaSize If in criteria are supported, defines what the maximum number of in entries are per predicate. -1 indicates no limit. -1
MaxDependentInPredicates If IN criteria are supported, defines what the maximum number of predicates that can be used for a dependent join. Values less than 1 indicate to use only one IN predicate per dependent value pushed. -1
NativeQueryProcedureName
If the native query is supported on the translator, this property indicates the name of the procedure.
native
SupportsNativeQueries
Set to true to indicate the translator supports the direct execution of commands using the native procedure
false

Note

Only a subset of the supports metadata can be set through execution properties. If more control is needed, see Red Hat JBoss Data Virtualization Development Guide: Server Development.