org.apache.cassandra.cql3.statements

Class SelectStatement

java.lang.Object

org.apache.cassandra.cql3.statements.SelectStatement

All Implemented Interfaces:

CQLStatement

public class SelectStatement
extends java.lang.Object
implements CQLStatement

Encapsulates a completely parsed SELECT query, including the target column family, expression, result count, and ordering clause.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SelectStatement.Parameters
static class	SelectStatement.RawStatement

Field Summary

Fields

Modifier and Type	Field and Description
CFDefinition	cfDef
SelectStatement.Parameters	parameters

Constructor Summary

Constructors

Constructor and Description
SelectStatement(CFDefinition cfDef, int boundTerms, SelectStatement.Parameters parameters, Selection selection, Term limit)

Method Summary

Methods

Modifier and Type	Method and Description
void	checkAccess(ClientState state) Perform any access verification necessary for the statement.
java.lang.String	columnFamily()
ResultMessage.Rows	execute(ConsistencyLevel cl, QueryState state, java.util.List<java.nio.ByteBuffer> variables, int pageSize, PagingState pagingState) Execute the statement and return the resulting result or null if there is no result.
ResultMessage.Rows	executeInternal(QueryState state) Variante of execute used for internal query against the system tables, and thus only query the local node.
int	getBoundsTerms() Returns the number of bound terms in this statement.
ResultSet.Metadata	getResultMetadata()
java.lang.String	keyspace()
ResultSet	process(java.util.List<Row> rows)
ResultMessage.Rows	processResults(java.util.List<Row> rows, java.util.List<java.nio.ByteBuffer> variables, int limit, long now)
void	validate(ClientState state) Perform additional validation required by the statment.

Methods inherited from class java.lang.Object

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

Field Detail

cfDef

public final CFDefinition cfDef

parameters

public final SelectStatement.Parameters parameters

Constructor Detail

SelectStatement

public SelectStatement(CFDefinition cfDef,
               int boundTerms,
               SelectStatement.Parameters parameters,
               Selection selection,
               Term limit)

Method Detail

getResultMetadata

public ResultSet.Metadata getResultMetadata()

getBoundsTerms

public int getBoundsTerms()

Description copied from interface: CQLStatement

Returns the number of bound terms in this statement.

Specified by:

getBoundsTerms in interface CQLStatement

checkAccess

public void checkAccess(ClientState state)
                 throws InvalidRequestException,
                        UnauthorizedException

Description copied from interface: CQLStatement

Perform any access verification necessary for the statement.

Specified by:

checkAccess in interface CQLStatement

Parameters:

state - the current client state

Throws:

InvalidRequestException

UnauthorizedException

validate

public void validate(ClientState state)
              throws InvalidRequestException

Description copied from interface: CQLStatement

Perform additional validation required by the statment. To be overriden by subclasses if needed.

Specified by:

validate in interface CQLStatement

Parameters:

state - the current client state

Throws:

InvalidRequestException

execute

public ResultMessage.Rows execute(ConsistencyLevel cl,
                         QueryState state,
                         java.util.List<java.nio.ByteBuffer> variables,
                         int pageSize,
                         PagingState pagingState)
                           throws RequestExecutionException,
                                  RequestValidationException

Description copied from interface: CQLStatement

Execute the statement and return the resulting result or null if there is no result.

Specified by:

execute in interface CQLStatement

Parameters:

cl - the consistency level for the query

state - the current query state

variables - the values for bounded variables. The implementation can assume that each bound term have a corresponding value.

pageSize - the initial page size for the result set potentially returned. A negative value means no paging needs to be done. Statements that do not return result sets can ignore this value.

pagingState - the paging state for paged query. All statement except Select should ignore that value.

Throws:

RequestExecutionException

RequestValidationException

processResults

public ResultMessage.Rows processResults(java.util.List<Row> rows,
                                java.util.List<java.nio.ByteBuffer> variables,
                                int limit,
                                long now)
                                  throws RequestValidationException

Throws:

RequestValidationException

executeInternal

public ResultMessage.Rows executeInternal(QueryState state)
                                   throws RequestExecutionException,
                                          RequestValidationException

Description copied from interface: CQLStatement

Variante of execute used for internal query against the system tables, and thus only query the local node.

Specified by:

executeInternal in interface CQLStatement

Parameters:

state - the current query state

Throws:

RequestExecutionException

RequestValidationException

process

public ResultSet process(java.util.List<Row> rows)
                  throws InvalidRequestException

Throws:

InvalidRequestException

keyspace

public java.lang.String keyspace()

columnFamily

public java.lang.String columnFamily()