org.apache.drill.exec.physical.resultSet.impl

Enum ColumnState.State

java.lang.Object

java.lang.Enum<ColumnState.State>

org.apache.drill.exec.physical.resultSet.impl.ColumnState.State

All Implemented Interfaces:

Serializable, Comparable<ColumnState.State>

Enclosing class:

ColumnState

protected static enum ColumnState.State
extends Enum<ColumnState.State>

Columns move through various lifecycle states as identified by this enum. (Yes, sorry that the term "state" is used in two different ways here: the variables for a column and the point within the column lifecycle.

Enum Constant Summary

Enum Constants

Enum Constant and Description
LOOK_AHEAD Indicates that the column has data saved in the overflow batch.
NEW_LOOK_AHEAD Like LOOK_AHEAD, but indicates the special case that the column was added after overflow, so there is no vector for the column in the harvested batch.
NORMAL Column is in the normal state of writing with no overflow in effect.
OVERFLOW Like NORMAL, but means that the data has overflowed and the column's data for the current row appears in the new, overflow batch.

Method Summary

Modifier and Type	Method and Description
static ColumnState.State	valueOf(String name) Returns the enum constant of this type with the specified name.
static ColumnState.State[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

NORMAL

public static final ColumnState.State NORMAL

Column is in the normal state of writing with no overflow in effect.

OVERFLOW

public static final ColumnState.State OVERFLOW

Like NORMAL, but means that the data has overflowed and the column's data for the current row appears in the new, overflow batch. For a client that omits some columns, written columns will be in OVERFLOW state, unwritten columns in NORMAL state.

LOOK_AHEAD

public static final ColumnState.State LOOK_AHEAD

Indicates that the column has data saved in the overflow batch.

NEW_LOOK_AHEAD

public static final ColumnState.State NEW_LOOK_AHEAD

Like LOOK_AHEAD, but indicates the special case that the column was added after overflow, so there is no vector for the column in the harvested batch.

Method Detail

values

public static ColumnState.State[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (ColumnState.State c : ColumnState.State.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static ColumnState.State valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null