org.apache.cassandra.cql3

Class MultiColumnRelation

java.lang.Object

org.apache.cassandra.cql3.Relation

org.apache.cassandra.cql3.MultiColumnRelation

public class MultiColumnRelation
extends Relation

A relation using the tuple notation, which typically affects multiple columns. Examples: - SELECT ... WHERE (a, b, c) > (1, 'a', 10) - SELECT ... WHERE (a, b, c) IN ((1, 2, 3), (4, 5, 6)) - SELECT ... WHERE (a, b) < ? - SELECT ... WHERE (a, b) IN ?

Field Summary

Fields inherited from class org.apache.cassandra.cql3.Relation

relationType

Method Summary

Modifier and Type	Method and Description
static MultiColumnRelation	createInRelation(java.util.List<ColumnIdentifier.Raw> entities, java.util.List<? extends Term.MultiColumnRaw> inValues) Creates a multi-column IN relation with a list of IN values or markers.
static MultiColumnRelation	createNonInRelation(java.util.List<ColumnIdentifier.Raw> entities, Operator relationType, Term.MultiColumnRaw valuesOrMarker) Creates a multi-column EQ, LT, LTE, GT, or GTE relation.
static MultiColumnRelation	createSingleMarkerInRelation(java.util.List<ColumnIdentifier.Raw> entities, Tuples.INRaw inMarker) Creates a multi-column IN relation with a marker for the IN values.
java.util.List<ColumnIdentifier.Raw>	getEntities()
boolean	isMultiColumn() Checks if this relation apply to multiple columns.
protected Restriction	newContainsRestriction(CFMetaData cfm, VariableSpecifications boundNames, boolean isKey) Creates a new Contains restriction instance.
protected Restriction	newEQRestriction(CFMetaData cfm, VariableSpecifications boundNames) Creates a new EQ restriction instance.
protected Restriction	newINRestriction(CFMetaData cfm, VariableSpecifications boundNames) Creates a new IN restriction instance.
protected Restriction	newSliceRestriction(CFMetaData cfm, VariableSpecifications boundNames, Bound bound, boolean inclusive) Creates a new Slice restriction instance.
protected java.util.List<ColumnDefinition>	receivers(CFMetaData cfm)
java.lang.String	toString()
protected Term	toTerm(java.util.List<? extends ColumnSpecification> receivers, Term.Raw raw, java.lang.String keyspace, VariableSpecifications boundNames) Converts the specified Raw into a Term.

Methods inherited from class org.apache.cassandra.cql3.Relation

isContains, isContainsKey, isEQ, isIN, isSlice, onToken, operator, toColumnDefinition, toRestriction, toTerms

Methods inherited from class java.lang.Object

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

Method Detail

createNonInRelation

public static MultiColumnRelation createNonInRelation(java.util.List<ColumnIdentifier.Raw> entities,
                                                      Operator relationType,
                                                      Term.MultiColumnRaw valuesOrMarker)

Creates a multi-column EQ, LT, LTE, GT, or GTE relation. For example: "SELECT ... WHERE (a, b) > (0, 1)"

Parameters:

entities - the columns on the LHS of the relation

relationType - the relation operator

valuesOrMarker - a Tuples.Literal instance or a Tuples.Raw marker

Returns:

a new MultiColumnRelation instance

createInRelation

public static MultiColumnRelation createInRelation(java.util.List<ColumnIdentifier.Raw> entities,
                                                   java.util.List<? extends Term.MultiColumnRaw> inValues)

Creates a multi-column IN relation with a list of IN values or markers. For example: "SELECT ... WHERE (a, b) IN ((0, 1), (2, 3))"

Parameters:

entities - the columns on the LHS of the relation

inValues - a list of Tuples.Literal instances or a Tuples.Raw markers

Returns:

a new MultiColumnRelation instance

createSingleMarkerInRelation

public static MultiColumnRelation createSingleMarkerInRelation(java.util.List<ColumnIdentifier.Raw> entities,
                                                               Tuples.INRaw inMarker)

Creates a multi-column IN relation with a marker for the IN values. For example: "SELECT ... WHERE (a, b) IN ?"

Parameters:

entities - the columns on the LHS of the relation

inMarker - a single IN marker

Returns:

a new MultiColumnRelation instance

getEntities

public java.util.List<ColumnIdentifier.Raw> getEntities()

isMultiColumn

public boolean isMultiColumn()

Description copied from class: Relation

Checks if this relation apply to multiple columns.

Overrides:

isMultiColumn in class Relation

Returns:

true if this relation apply to multiple columns, false otherwise.

newEQRestriction

protected Restriction newEQRestriction(CFMetaData cfm,
                                       VariableSpecifications boundNames)
                                throws InvalidRequestException

Description copied from class: Relation

Creates a new EQ restriction instance.

Specified by:

newEQRestriction in class Relation

Parameters:

cfm - the Column Family meta data

boundNames - the variables specification where to collect the bind variables

Returns:

a new EQ restriction instance.

Throws:

InvalidRequestException - if the relation cannot be converted into an EQ restriction.

newINRestriction

protected Restriction newINRestriction(CFMetaData cfm,
                                       VariableSpecifications boundNames)
                                throws InvalidRequestException

Description copied from class: Relation

Creates a new IN restriction instance.

Specified by:

newINRestriction in class Relation

Parameters:

cfm - the Column Family meta data

boundNames - the variables specification where to collect the bind variables

Returns:

a new IN restriction instance

Throws:

InvalidRequestException - if the relation cannot be converted into an IN restriction.

newSliceRestriction

protected Restriction newSliceRestriction(CFMetaData cfm,
                                          VariableSpecifications boundNames,
                                          Bound bound,
                                          boolean inclusive)
                                   throws InvalidRequestException

Description copied from class: Relation

Creates a new Slice restriction instance.

Specified by:

newSliceRestriction in class Relation

Parameters:

cfm - the Column Family meta data

boundNames - the variables specification where to collect the bind variables

bound - the slice bound

inclusive - true if the bound is included.

Returns:

a new slice restriction instance

Throws:

InvalidRequestException - if the Relation is not valid

newContainsRestriction

protected Restriction newContainsRestriction(CFMetaData cfm,
                                             VariableSpecifications boundNames,
                                             boolean isKey)
                                      throws InvalidRequestException

Description copied from class: Relation

Creates a new Contains restriction instance.

Specified by:

newContainsRestriction in class Relation

Parameters:

cfm - the Column Family meta data

boundNames - the variables specification where to collect the bind variables

isKey - true if the restriction to create is a CONTAINS KEY

Returns:

a new Contains Restriction instance

Throws:

InvalidRequestException - if the Relation is not valid

toTerm

protected Term toTerm(java.util.List<? extends ColumnSpecification> receivers,
                      Term.Raw raw,
                      java.lang.String keyspace,
                      VariableSpecifications boundNames)
               throws InvalidRequestException

Description copied from class: Relation

Converts the specified Raw into a Term.

Specified by:

toTerm in class Relation

Parameters:

receivers - the columns to which the values must be associated at

raw - the raw term to convert

keyspace - the keyspace name

boundNames - the variables specification where to collect the bind variables

Returns:

the Term corresponding to the specified Raw

Throws:

InvalidRequestException - if the Raw term is not valid

receivers

protected java.util.List<ColumnDefinition> receivers(CFMetaData cfm)
                                              throws InvalidRequestException

Throws:

InvalidRequestException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object