org.h2.table

Class IndexColumn

java.lang.Object

org.h2.table.IndexColumn

public class IndexColumn
extends java.lang.Object

This represents a column item of an index. This is required because some indexes support descending sorted columns.

Field Summary

Fields

Modifier and Type	Field and Description
Column	column The column, or null if not set.
java.lang.String	columnName The column name.
int	sortType The sort type.

Constructor Summary

Constructors

Constructor and Description
IndexColumn()

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.StringBuilder	getSQL(java.lang.StringBuilder builder) Appends the SQL snippet for this index column to the specified string builder.
static void	mapColumns(IndexColumn[] indexColumns, Table table) Map the columns using the column names and the specified table.
java.lang.String	toString()
static IndexColumn[]	wrap(Column[] columns) Create an array of index columns from a list of columns.
static java.lang.StringBuilder	writeColumns(java.lang.StringBuilder builder, IndexColumn[] columns) Appends the specified columns to the specified builder.
static java.lang.StringBuilder	writeColumns(java.lang.StringBuilder builder, IndexColumn[] columns, java.lang.String separator, java.lang.String suffix) Appends the specified columns to the specified builder.

Methods inherited from class java.lang.Object

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

Field Detail

columnName

public java.lang.String columnName

The column name.

column

public Column column

The column, or null if not set.

sortType

public int sortType

The sort type. Ascending (the default) and descending are supported; nulls can be sorted first or last.

Constructor Detail

IndexColumn

public IndexColumn()

Method Detail

writeColumns

public static java.lang.StringBuilder writeColumns(java.lang.StringBuilder builder,
                                   IndexColumn[] columns)

Appends the specified columns to the specified builder.

Parameters:

builder - string builder

columns - index columns

Returns:

the specified string builder

writeColumns

public static java.lang.StringBuilder writeColumns(java.lang.StringBuilder builder,
                                   IndexColumn[] columns,
                                   java.lang.String separator,
                                   java.lang.String suffix)

Appends the specified columns to the specified builder.

Parameters:

builder - string builder

columns - index columns

separator - separator

suffix - additional SQL to append after each column

Returns:

the specified string builder

getSQL

public java.lang.StringBuilder getSQL(java.lang.StringBuilder builder)

Appends the SQL snippet for this index column to the specified string builder.

Parameters:

builder - string builder

Returns:

the specified string builder

wrap

public static IndexColumn[] wrap(Column[] columns)

Create an array of index columns from a list of columns. The default sort type is used.

Parameters:

columns - the column list

Returns:

the index column array

mapColumns

public static void mapColumns(IndexColumn[] indexColumns,
              Table table)

Map the columns using the column names and the specified table.

Parameters:

indexColumns - the column list with column names set

table - the table from where to map the column names to columns

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object