org.apache.hadoop.hbase.hql
Class AlterCommand
java.lang.Object
org.apache.hadoop.hbase.hql.BasicCommand
org.apache.hadoop.hbase.hql.SchemaModificationCommand
org.apache.hadoop.hbase.hql.AlterCommand
- All Implemented Interfaces:
- Command, CommandFactory
public class AlterCommand
- extends SchemaModificationCommand
Alters tables.
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
AlterCommand
public AlterCommand(Writer o)
execute
public ReturnMsg execute(HBaseConfiguration conf)
- Description copied from interface:
Command
- Execute a command
- Parameters:
conf
- Configuration
- Returns:
- Result of command execution
setTable
public void setTable(String t)
- Sets the table to be altered.
- Parameters:
t
- Table to be altered.
addColumnSpec
public void addColumnSpec(String c,
Map<String,Object> columnSpec)
- Adds a column specification.
- Parameters:
columnSpec
- Column specification
setColumn
public void setColumn(String c)
- Sets the column to be dropped. Only applicable to the DROP operation.
- Parameters:
c
- Column to be dropped.
setOperationType
public void setOperationType(AlterCommand.OperationType operationType)
- Sets the operation type of this alteration.
- Parameters:
operationType
- Operation type- See Also:
AlterCommand.OperationType
getCommandType
public Command.CommandType getCommandType()
- Specified by:
getCommandType
in interface Command
- Overrides:
getCommandType
in class BasicCommand
- Returns:
- Type of this command whether DDL, SELECT, INSERT, UPDATE, DELETE,
or SHELL.
getColumnDescriptor
protected HColumnDescriptor getColumnDescriptor(String column,
Map<String,Object> columnSpec,
HColumnDescriptor original)
throws IllegalArgumentException
- Given a column name, column spec, and original descriptor, returns an
instance of HColumnDescriptor representing the column spec, with empty
values drawn from the original as defaults
- Throws:
IllegalArgumentException
Copyright © 2006 The Apache Software Foundation