com.mysql.clusterj.core.query.CandidateIndexImpl Class Reference

Collaboration diagram for com.mysql.clusterj.core.query.CandidateIndexImpl:

Classes
class	CandidateColumnImpl

Public Member Functions
	CandidateIndexImpl (String className, Index storeIndex, boolean unique, AbstractDomainFieldHandlerImpl[] fields)
String	toString ()
void	markLowerBound (int fieldNumber, PredicateImpl predicate, boolean strict)
void	markUpperBound (int fieldNumber, PredicateImpl predicate, boolean strict)
void	markEqualBound (int fieldNumber, PredicateImpl predicate)
void	markInBound (int fieldNumber, InPredicateImpl predicate)
ScanType	getScanType ()
boolean	supportsConditionsOfLength (int numberOfConditions)
Index	getStoreIndex ()
boolean	isMultiRange ()

Static Public Member Functions
static CandidateIndexImpl	getIndexForNullWhereClause ()

Protected Member Functions
	CandidateIndexImpl ()

Detailed Description

This class is responsible for deciding whether an index can be used for a specific query. An instance of this class is created to evaluate a query and to decide whether the index can be used in executing the query. An inner class represents each candidateColumn in the index.

An instance of this class is created for each index for each query, and an instance of the candidate column for each column of the index. During execution of the query, the query terms are used to mark the candidate columns and associate candidate columns with each query term. Each query term might be associated with multiple candidate columns, one for each index containing the column referenced by the query term.

Definition at line 49 of file CandidateIndexImpl.java.

Constructor & Destructor Documentation

com.mysql.clusterj.core.query.CandidateIndexImpl.CandidateIndexImpl ( )

inlineprotected

The CandidateIndexImpl used in cases of no where clause.

Definition at line 111 of file CandidateIndexImpl.java.

Member Function Documentation

static CandidateIndexImpl com.mysql.clusterj.core.query.CandidateIndexImpl.getIndexForNullWhereClause ( )

inlinestatic

The accessor for the no where clause candidate index.

Definition at line 106 of file CandidateIndexImpl.java.

Here is the caller graph for this function:

boolean com.mysql.clusterj.core.query.CandidateIndexImpl.supportsConditionsOfLength ( int  numberOfConditions )

inline

Determine whether this index supports exactly the number of conditions. For ordered indexes, any number of conditions are supported via filters. For hash indexes, only the number of columns in the index are supported.

Parameters

numberOfConditions

the number of conditions in the query predicate

Returns

if this index supports exactly the number of conditions

Definition at line 502 of file CandidateIndexImpl.java.

---

The documentation for this class was generated from the following file:

• storage/ndb/clusterj/clusterj-core/src/main/java/com/mysql/clusterj/core/query/CandidateIndexImpl.java