Package com.apple.foundationdb.record.query.plan.temp.properties

Class RecordTypesProperty

java.lang.Object

com.apple.foundationdb.record.query.plan.temp.properties.RecordTypesProperty

All Implemented Interfaces:

PlannerProperty<Set<String>>

@API(EXPERIMENTAL)
public class RecordTypesProperty
extends Object
implements PlannerProperty<Set<String>>

A property visitor that determines the set of record type names (as Strings) that a RelationalExpression could produce. This property is used in determining whether type filters are necessary, among other things.

Method Summary

Modifier and Type	Method	Description
static Set<String>	evaluate(PlanContext context, Quantifiers.AliasResolver aliasResolver, ExpressionRef<? extends RelationalExpression> ref)
static Set<String>	evaluate(PlanContext context, Quantifiers.AliasResolver aliasResolver, RelationalExpression ref)
Set<String>	evaluateAtExpression(RelationalExpression expression, List<Set<String>> childResults)	Evaluate the property at the given expression, using the results of evaluating the property at its children.
Set<String>	evaluateAtRef(ExpressionRef<? extends RelationalExpression> ref, List<Set<String>> memberResults)	Evaluate the property at the given reference, using the results of evaluating the property at its members.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.apple.foundationdb.record.query.plan.temp.PlannerProperty

evaluateAtQuantifier, shouldVisit, shouldVisit, shouldVisit

Method Detail

evaluateAtExpression

@Nonnull
public Set<String> evaluateAtExpression(@Nonnull
                                        RelationalExpression expression,
                                        @Nonnull
                                        List<Set<String>> childResults)

Description copied from interface: PlannerProperty

Evaluate the property at the given expression, using the results of evaluating the property at its children. Called on nodes in the graph in visit post-order of the depth-first traversal of the graph. That is, as each expression is visited (after all of its children have been visited, if applicable), evaluateAtExpression() is called on that expression.

Specified by:

evaluateAtExpression in interface PlannerProperty<Set<String>>

Parameters:

expression - the cursor to visit

childResults - the results of the property evaluated at the children of expression

Returns:

the value of property at the given expression

evaluateAtRef

@Nonnull
public Set<String> evaluateAtRef(@Nonnull
                                 ExpressionRef<? extends RelationalExpression> ref,
                                 @Nonnull
                                 List<Set<String>> memberResults)

Description copied from interface: PlannerProperty

Evaluate the property at the given reference, using the results of evaluating the property at its members. Called on nodes in the graph in visit post-order of the depth-first traversal of the graph. That is, as each reference is visited (after all of its members have been visited, if applicable), evaluateAtRef() is called on that reference.

Specified by:

evaluateAtRef in interface PlannerProperty<Set<String>>

Parameters:

ref - the expression reference to visit

memberResults - the results of the property evaluated at the members of ref

Returns:

the value of property at the given reference

evaluate

@Nonnull
public static Set<String> evaluate(@Nonnull
                                   PlanContext context,
                                   @Nonnull
                                   Quantifiers.AliasResolver aliasResolver,
                                   @Nonnull
                                   ExpressionRef<? extends RelationalExpression> ref)

evaluate

@Nonnull
public static Set<String> evaluate(@Nonnull
                                   PlanContext context,
                                   @Nonnull
                                   Quantifiers.AliasResolver aliasResolver,
                                   @Nonnull
                                   RelationalExpression ref)