org.apache.cassandra.cql3.statements
Class SchemaAlteringStatement

java.lang.Object
  org.apache.cassandra.cql3.statements.ParsedStatement
      org.apache.cassandra.cql3.statements.CFStatement
          org.apache.cassandra.cql3.statements.SchemaAlteringStatement

All Implemented Interfaces:

CQLStatement

Direct Known Subclasses:

AlterKeyspaceStatement, AlterTableStatement, CreateColumnFamilyStatement, CreateIndexStatement, CreateKeyspaceStatement, DropColumnFamilyStatement, DropIndexStatement, DropKeyspaceStatement

public abstract class SchemaAlteringStatement
extends CFStatement
implements CQLStatement

Abstract class for statements that alter the schema.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.cql3.statements.ParsedStatement

ParsedStatement.Prepared

Field Summary

Fields inherited from class org.apache.cassandra.cql3.statements.CFStatement

cfName

Constructor Summary

protected	SchemaAlteringStatement()
protected	SchemaAlteringStatement(CFName name)

Method Summary

abstract void	announceMigration()
abstract ResultMessage.SchemaChange.Change	changeType()
ResultMessage	execute(ConsistencyLevel cl, QueryState state, java.util.List<java.nio.ByteBuffer> variables) Execute the statement and return the resulting result or null if there is no result.
ResultMessage	executeInternal(QueryState state) Variante of execute used for internal query against the system tables, and thus only query the local node.
ParsedStatement.Prepared	prepare()
void	prepareKeyspace(ClientState state)
void	validate(ClientState state) Perform additional validation required by the statment.

Methods inherited from class org.apache.cassandra.cql3.statements.CFStatement

columnFamily, keyspace

Methods inherited from class org.apache.cassandra.cql3.statements.ParsedStatement

getBoundsTerms, setBoundTerms

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.cql3.CQLStatement

checkAccess, getBoundsTerms

Constructor Detail

SchemaAlteringStatement

protected SchemaAlteringStatement()

SchemaAlteringStatement

protected SchemaAlteringStatement(CFName name)

Method Detail

prepareKeyspace

public void prepareKeyspace(ClientState state)
                     throws InvalidRequestException

Overrides:

prepareKeyspace in class CFStatement

Throws:

InvalidRequestException

prepare

public ParsedStatement.Prepared prepare()

Specified by:

prepare in class ParsedStatement

changeType

public abstract ResultMessage.SchemaChange.Change changeType()

announceMigration

public abstract void announceMigration()
                                throws RequestValidationException

Throws:

RequestValidationException

validate

public void validate(ClientState state)
              throws RequestValidationException

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:

RequestValidationException

execute

public ResultMessage execute(ConsistencyLevel cl,
                             QueryState state,
                             java.util.List<java.nio.ByteBuffer> variables)
                      throws 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

state - the current query state

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

Throws:

RequestValidationException

executeInternal

public ResultMessage executeInternal(QueryState state)

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