org.apache.drill.exec.store.hive.schema

Class DrillHiveViewTable

java.lang.Object

org.apache.drill.exec.planner.logical.DrillViewTable

org.apache.drill.exec.store.hive.schema.DrillHiveViewTable

All Implemented Interfaces:

org.apache.calcite.schema.Table, org.apache.calcite.schema.TranslatableTable, DrillViewInfoProvider

public class DrillHiveViewTable
extends DrillViewTable

DrillViewTable which may be created from Hive view metadata and will work similar to views defined in Drill.

Constructor Summary

Constructors

Constructor and Description
DrillHiveViewTable(HiveReadEntry entry, List<String> schemaPath, SchemaConfig schemaConfig, String user)

Method Summary

Modifier and Type

Method and Description

protected org.apache.calcite.rel.RelNode

expandViewForImpersonatedUser(org.apache.calcite.plan.RelOptTable.ToRelContext context, org.apache.calcite.rel.type.RelDataType rowType, List<String> workspaceSchemaPath, org.apache.calcite.schema.SchemaPlus tokenSchemaTree) Because tables used by hive views, defined without name of storage plugin, we're making sure that storage plugin name will be taken into account for the special case, when hive storage based authorization is used, and user can query view, but doesn't have rights to access underlying table.

Methods inherited from class org.apache.drill.exec.planner.logical.DrillViewTable

getJdbcTableType, getRowType, getStatistic, getViewSql, isRolledUp, rolledUpColumnValidInsideAgg, toRel

Methods inherited from class java.lang.Object

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

Constructor Detail

DrillHiveViewTable

public DrillHiveViewTable(HiveReadEntry entry,
                          List<String> schemaPath,
                          SchemaConfig schemaConfig,
                          String user)

Method Detail

expandViewForImpersonatedUser

protected org.apache.calcite.rel.RelNode expandViewForImpersonatedUser(org.apache.calcite.plan.RelOptTable.ToRelContext context,
                                                                       org.apache.calcite.rel.type.RelDataType rowType,
                                                                       List<String> workspaceSchemaPath,
                                                                       org.apache.calcite.schema.SchemaPlus tokenSchemaTree)

Because tables used by hive views, defined without name of storage plugin, we're making sure that storage plugin name will be taken into account for the special case, when hive storage based authorization is used, and user can query view, but doesn't have rights to access underlying table.

Overrides:

expandViewForImpersonatedUser in class DrillViewTable

Parameters:

context - - to rel conversion context

rowType - - data type of requested columns

workspaceSchemaPath - - path to view in drill, for example: ["hive"]

tokenSchemaTree - - schema created for impersonated user

Returns:

- relational representation of expanded Hive view