org.apache.calcite.schema

Interface CustomColumnResolvingTable

All Superinterfaces:

Table

public interface CustomColumnResolvingTable
extends Table

Extension to Table that specifies a custom way to resolve column names.

It is optional for a Table to implement this interface. If Table does not implement this interface, column resolving will be performed in the default way.

NOTE: This class is experimental and subject to change/removal without notice.

Method Summary

Modifier and Type	Method and Description
List<Pair<RelDataTypeField,List<String>>>	resolveColumn(RelDataType rowType, RelDataTypeFactory typeFactory, List<String> names) Resolve a column based on the name components.

Methods inherited from interface org.apache.calcite.schema.Table

getJdbcTableType, getRowType, getStatistic, isRolledUp, rolledUpColumnValidInsideAgg

Method Detail

resolveColumn

List<Pair<RelDataTypeField,List<String>>> resolveColumn(RelDataType rowType,
                                                        RelDataTypeFactory typeFactory,
                                                        List<String> names)

Resolve a column based on the name components. One or more the input name components can be resolved to one field in the table row type, along with a remainder list of name components which have not been resolved within this call, and which in turn can be potentially resolved as sub-field names. In the meantime, this method can return multiple matches, which is a list of pairs containing the resolved field and the remaining name components.

Parameters:

rowType - the table row type

typeFactory - the type factory

names - the name components to be resolved

Returns:

a list of pairs containing the resolved field and the remaining name components.