org.apache.drill.exec.store.ischema

Enum InfoSchemaTableType

java.lang.Object

java.lang.Enum<InfoSchemaTableType>

org.apache.drill.exec.store.ischema.InfoSchemaTableType

All Implemented Interfaces:

Serializable, Comparable<InfoSchemaTableType>, DrillTableSelection

public enum InfoSchemaTableType
extends Enum<InfoSchemaTableType>
implements DrillTableSelection

The set of tables / views in INFORMATION_SCHEMA.

Enum Constant Summary

Enum Constants

Enum Constant and Description
CATALOGS
COLUMNS
FILES
PARTITIONS
SCHEMATA
TABLES
VIEWS

Method Summary

Modifier and Type	Method and Description
String	digest() The digest of the selection represented by the implementation.
<S> PojoRecordReader<S>	getRecordReader(org.apache.calcite.schema.SchemaPlus rootSchema, InfoSchemaFilter filter, OptionManager optionManager, MetastoreRegistry metastoreRegistry)
org.apache.calcite.rel.type.RelDataType	getRowType(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory)
static InfoSchemaTableType	valueOf(String name) Returns the enum constant of this type with the specified name.
static InfoSchemaTableType[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

CATALOGS

public static final InfoSchemaTableType CATALOGS

SCHEMATA

public static final InfoSchemaTableType SCHEMATA

VIEWS

public static final InfoSchemaTableType VIEWS

COLUMNS

public static final InfoSchemaTableType COLUMNS

TABLES

public static final InfoSchemaTableType TABLES

PARTITIONS

public static final InfoSchemaTableType PARTITIONS

FILES

public static final InfoSchemaTableType FILES

Method Detail

values

public static InfoSchemaTableType[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (InfoSchemaTableType c : InfoSchemaTableType.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static InfoSchemaTableType valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

getRecordReader

public <S> PojoRecordReader<S> getRecordReader(org.apache.calcite.schema.SchemaPlus rootSchema,
                                               InfoSchemaFilter filter,
                                               OptionManager optionManager,
                                               MetastoreRegistry metastoreRegistry)

getRowType

public org.apache.calcite.rel.type.RelDataType getRowType(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory)

digest

public String digest()

Description copied from interface: DrillTableSelection

The digest of the selection represented by the implementation. The selections that accompany Tables can modify the contained dataset, e.g. a file selection can restrict to a subset of the available data and a format selection can include options that affect the behaviour of the underlying reader. Two scans will end up being considered identical during logical planning if their digests are the same so selection implementations should override this method so that exactly those scans that really are identical (in terms of the data they produce) have matching digests.

Specified by:

digest in interface DrillTableSelection

Returns:

this selection's digest, normally a string built from its properties.