org.h2.table

接口 ColumnResolver

所有已知实现类:

SelectListColumnResolver, SingleColumnResolver, TableFilter

public interface ColumnResolver

A column resolver is list of column (for example, a table) that can map a column name to an actual column.

方法概要

限定符和类型	方法和说明
Column[]	getColumns() Get the column list.
Column	getRowIdColumn() Get the row id pseudo column, if there is one.
String	getSchemaName() Get the schema name.
Select	getSelect() Get the select statement.
Column[]	getSystemColumns() Get the list of system columns, if any.
String	getTableAlias() Get the table alias.
TableFilter	getTableFilter() Get the table filter.
Value	getValue(Column column) Get the value for the given column.
Expression	optimize(ExpressionColumn expressionColumn, Column column) Get the expression that represents this column.

方法详细资料

getTableAlias

String getTableAlias()

Get the table alias.

返回:

the table alias

getColumns

Column[] getColumns()

Get the column list.

返回:

the column list

getSystemColumns

Column[] getSystemColumns()

Get the list of system columns, if any.

返回:

the system columns or null

getRowIdColumn

Column getRowIdColumn()

Get the row id pseudo column, if there is one.

返回:

the row id column or null

getSchemaName

String getSchemaName()

Get the schema name.

返回:

the schema name

getValue

Value getValue(Column column)

Get the value for the given column.

参数:

column - the column

返回:

the value

getTableFilter

TableFilter getTableFilter()

Get the table filter.

返回:

the table filter

getSelect

Select getSelect()

Get the select statement.

返回:

the select statement

optimize

Expression optimize(ExpressionColumn expressionColumn,
                    Column column)

Get the expression that represents this column.

参数:

expressionColumn - the expression column

column - the column

返回:

the optimized expression