Package org.h2.table

Interface ColumnResolver

All Known Implementing Classes:
DomainColumnResolver, SelectListColumnResolver, 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.

  • Method Details

    • getTableAlias

      default String getTableAlias()
      Get the table alias.
      Returns:
      the table alias

    • getColumns

      Column[] getColumns()
      Get the column list.
      Returns:
      the column list

    • findColumn

      Column findColumn(String name)
      Get the column with the specified name.
      Parameters:
      name - the column name, must be a derived name if this column resolver has a derived column list
      Returns:
      the column with the specified name, or null

    • getColumnName

      default String getColumnName(Column column)
      Get the name of the specified column.
      Parameters:
      column - column
      Returns:
      column name

    • hasDerivedColumnList

      default boolean hasDerivedColumnList()
      Returns whether this column resolver has a derived column list.
      Returns:
      true if this column resolver has a derived column list, false otherwise

    • getSystemColumns

      default Column[] getSystemColumns()
      Get the list of system columns, if any.
      Returns:
      the system columns or null

    • getRowIdColumn

      default Column getRowIdColumn()
      Get the row id pseudo column, if there is one.
      Returns:
      the row id column or null

    • getSchemaName

      default String getSchemaName()
      Get the schema name or null.
      Returns:
      the schema name or null

    • getValue

      Value getValue(Column column)
      Get the value for the given column.
      Parameters:
      column - the column
      Returns:
      the value

    • getTableFilter

      default TableFilter getTableFilter()
      Get the table filter.
      Returns:
      the table filter

    • getSelect

      default Select getSelect()
      Get the select statement.
      Returns:
      the select statement

    • optimize

      default Expression optimize(ExpressionColumn expressionColumn, Column column)
      Get the expression that represents this column.
      Parameters:
      expressionColumn - the expression column
      column - the column
      Returns:
      the optimized expression