Package 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	Description
Column	column	The column, or null if not set.
java.lang.String	columnName	The column name.
int	sortType	The sort type.
static int	SQL_NO_ORDER	Do not append ordering.

Constructor Summary

Constructors

Constructor	Description
IndexColumn(java.lang.String columnName)	Creates a new instance with the specified name.
IndexColumn(java.lang.String columnName, int sortType)	Creates a new instance with the specified name.
IndexColumn(Column column)	Creates a new instance with the specified column.

Method Summary

Modifier and Type	Method	Description
java.lang.StringBuilder	getSQL(java.lang.StringBuilder builder, int sqlFlags)	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, int sqlFlags)	Appends the specified columns to the specified builder.
static java.lang.StringBuilder	writeColumns(java.lang.StringBuilder builder, IndexColumn[] columns, int startOffset, int endOffset, int sqlFlags)	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, int sqlFlags)	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

SQL_NO_ORDER

public static final int SQL_NO_ORDER

Do not append ordering.

See Also:

Constant Field Values

columnName

public final 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(java.lang.String columnName)

Creates a new instance with the specified name.

Parameters:

columnName - the column name

IndexColumn

public IndexColumn(java.lang.String columnName,
                   int sortType)

Creates a new instance with the specified name.

Parameters:

columnName - the column name

sortType - the sort type

IndexColumn

public IndexColumn(Column column)

Creates a new instance with the specified column.

Parameters:

column - the column

Method Detail

writeColumns

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

Appends the specified columns to the specified builder.

Parameters:

builder - string builder

columns - index columns

sqlFlags - formatting flags

Returns:

the specified string builder

writeColumns

public static java.lang.StringBuilder writeColumns(java.lang.StringBuilder builder,
                                                   IndexColumn[] columns,
                                                   int startOffset,
                                                   int endOffset,
                                                   int sqlFlags)

Appends the specified columns to the specified builder.

Parameters:

builder - string builder

startOffset - start offset, inclusive

endOffset - end offset, exclusive

columns - index columns

sqlFlags - formatting flags

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,
                                                   int sqlFlags)

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

sqlFlags - formatting flags

Returns:

the specified string builder

getSQL

public java.lang.StringBuilder getSQL(java.lang.StringBuilder builder,
                                      int sqlFlags)

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

Parameters:

builder - string builder

sqlFlags - formatting flags

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