org.apache.drill.exec.store

Class SubSchemaWrapper

java.lang.Object

org.apache.drill.exec.store.AbstractSchema

org.apache.drill.exec.store.SubSchemaWrapper

All Implemented Interfaces:

AutoCloseable, org.apache.calcite.schema.Schema, SchemaPartitionExplorer

public class SubSchemaWrapper
extends AbstractSchema

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.calcite.schema.Schema

org.apache.calcite.schema.Schema.TableType

Field Summary

Fields inherited from class org.apache.drill.exec.store.AbstractSchema

name, schemaPath

Constructor Summary

Constructors

Constructor and Description
SubSchemaWrapper(AbstractSchema innerSchema)

Method Summary

Methods

Modifier and Type	Method and Description
CreateTableEntry	createNewTable(String tableName, List<String> partitionColumns, StorageStrategy storageStrategy) Creates table entry using table name, list of partition columns and storage strategy used to create table folder and files
org.apache.calcite.schema.Schema	getDefaultSchema() The schema can be a top level schema which doesn't have its own tables, but refers to one of the default sub schemas for table look up.
Set<String>	getFunctionNames()
Collection<org.apache.calcite.schema.Function>	getFunctions(String name)
Iterable<String>	getSubPartitions(String table, List<String> partitionColumns, List<String> partitionValues) Get a list of sub-partitions of a particular table and the partitions specified by partition columns and values.
org.apache.calcite.schema.Schema	getSubSchema(String name)
Set<String>	getSubSchemaNames()
org.apache.calcite.schema.Table	getTable(String name)
Set<String>	getTableNames()
String	getTypeName()
boolean	isMutable()
boolean	showInInformationSchema() Reports whether to show items from this schema in INFORMATION_SCHEMA tables.

Methods inherited from class org.apache.drill.exec.store.AbstractSchema

close, contentsHaveChangedSince, createNewTable, createView, dropTable, dropView, getExpression, getFullSchemaName, getName, getSchemaPath, getTableNamesAndTypes, getTablesByNames, getTablesByNamesByBulkLoad

Methods inherited from class java.lang.Object

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

Constructor Detail

SubSchemaWrapper

public SubSchemaWrapper(AbstractSchema innerSchema)

Method Detail

showInInformationSchema

public boolean showInInformationSchema()

Description copied from class: AbstractSchema

Reports whether to show items from this schema in INFORMATION_SCHEMA tables. (Controls ... TODO: Doc.: Mention what this typically controls or affects.)

This base implementation returns true.

Overrides:

showInInformationSchema in class AbstractSchema

getSubPartitions

public Iterable<String> getSubPartitions(String table,
                                List<String> partitionColumns,
                                List<String> partitionValues)
                                  throws PartitionNotFoundException

Description copied from interface: SchemaPartitionExplorer

Get a list of sub-partitions of a particular table and the partitions specified by partition columns and values. Individual storage plugins will assign specific meaning to the parameters and return values. For more info see docs in PartitionExplorer.

Specified by:

getSubPartitions in interface SchemaPartitionExplorer

Overrides:

getSubPartitions in class AbstractSchema

partitionColumns - a list of partitions to match

partitionValues - list of values of each partition (corresponding to the partition column list)

Returns:

list of sub-partitions, will be empty if a there is no further level of sub-partitioning below, i.e. hit a leaf partition

Throws:

PartitionNotFoundException - when the partition does not exist in the given workspace

getDefaultSchema

public org.apache.calcite.schema.Schema getDefaultSchema()

Description copied from class: AbstractSchema

The schema can be a top level schema which doesn't have its own tables, but refers to one of the default sub schemas for table look up. Default implementation returns itself. Ex. "dfs" schema refers to the tables in "default" workspace when querying for tables in "dfs" schema.

Overrides:

getDefaultSchema in class AbstractSchema

Returns:

Return the default schema where tables are created or retrieved from.

createNewTable

public CreateTableEntry createNewTable(String tableName,
                              List<String> partitionColumns,
                              StorageStrategy storageStrategy)

Description copied from class: AbstractSchema

Creates table entry using table name, list of partition columns and storage strategy used to create table folder and files

Overrides:

createNewTable in class AbstractSchema

Parameters:

tableName - : new table name.

partitionColumns - : list of partition columns. Empty list if there is no partition columns.

storageStrategy - : storage strategy used to create table folder and files

Returns:

create table entry

getFunctions

public Collection<org.apache.calcite.schema.Function> getFunctions(String name)

Specified by:

getFunctions in interface org.apache.calcite.schema.Schema

Overrides:

getFunctions in class AbstractSchema

getFunctionNames

public Set<String> getFunctionNames()

Specified by:

getFunctionNames in interface org.apache.calcite.schema.Schema

Overrides:

getFunctionNames in class AbstractSchema

getSubSchema

public org.apache.calcite.schema.Schema getSubSchema(String name)

Specified by:

getSubSchema in interface org.apache.calcite.schema.Schema

Overrides:

getSubSchema in class AbstractSchema

getSubSchemaNames

public Set<String> getSubSchemaNames()

Specified by:

getSubSchemaNames in interface org.apache.calcite.schema.Schema

Overrides:

getSubSchemaNames in class AbstractSchema

isMutable

public boolean isMutable()

Specified by:

isMutable in interface org.apache.calcite.schema.Schema

Overrides:

isMutable in class AbstractSchema

getTable

public org.apache.calcite.schema.Table getTable(String name)

Specified by:

getTable in interface org.apache.calcite.schema.Schema

Overrides:

getTable in class AbstractSchema

getTableNames

public Set<String> getTableNames()

Specified by:

getTableNames in interface org.apache.calcite.schema.Schema

Overrides:

getTableNames in class AbstractSchema

getTypeName

public String getTypeName()

Specified by:

getTypeName in class AbstractSchema