SystemTable (Drill : 1.20.3 API)

java.lang.Object
- java.lang.Enum<SystemTable>
- - org.apache.drill.exec.store.sys.SystemTable

All Implemented Interfaces:

Serializable, Comparable<SystemTable>, DrillTableSelection
```
public enum SystemTable
extends Enum<SystemTable>
implements DrillTableSelection
```
An enumeration of all tables in Drill's system ("sys") schema.
OPTION, DRILLBITS and VERSION are local tables available on every Drillbit. MEMORY and THREADS are distributed tables with one record on every Drillbit. PROFILES and PROFILES_JSON are stored in local / distributed storage.

Enum Constant Summary

Enum Constants
Enum Constant and Description
`BOOT`
`CONNECTIONS`
`DRILLBITS`
`FUNCTIONS`
`INTERNAL_OPTIONS`
`INTERNAL_OPTIONS_OLD`
`MEMORY`
`OPTIONS`
`OPTIONS_OLD`
`PROFILES`
`PROFILES_JSON`
`STORAGE_ALIASES`
`TABLE_ALIASES`
`THREADS`
`VERSION`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`String`	`digest()` The digest of the selection represented by the implementation.
`Iterator<Object>`	`getIterator(ExecutorFragmentContext context, int maxRecords)`
`Class<?>`	`getPojoClass()`
`String`	`getTableName()`
`boolean`	`isDistributed()`
`static SystemTable`	`valueOf(String name)` Returns the enum constant of this type with the specified name.
`static SystemTable[]`	`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
  - OPTIONS_OLD
```
public static final SystemTable OPTIONS_OLD
```
  - OPTIONS
```
public static final SystemTable OPTIONS
```
  - INTERNAL_OPTIONS_OLD
```
public static final SystemTable INTERNAL_OPTIONS_OLD
```
  - INTERNAL_OPTIONS
```
public static final SystemTable INTERNAL_OPTIONS
```
  - BOOT
```
public static final SystemTable BOOT
```
  - DRILLBITS
```
public static final SystemTable DRILLBITS
```
  - VERSION
```
public static final SystemTable VERSION
```
  - MEMORY
```
public static final SystemTable MEMORY
```
  - CONNECTIONS
```
public static final SystemTable CONNECTIONS
```
  - PROFILES
```
public static final SystemTable PROFILES
```
  - PROFILES_JSON
```
public static final SystemTable PROFILES_JSON
```
  - THREADS
```
public static final SystemTable THREADS
```
  - FUNCTIONS
```
public static final SystemTable FUNCTIONS
```
  - STORAGE_ALIASES
```
public static final SystemTable STORAGE_ALIASES
```
  - TABLE_ALIASES
```
public static final SystemTable TABLE_ALIASES
```
- Method Detail
  - values
```
public static SystemTable[] 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 (SystemTable c : SystemTable.values())
    System.out.println(c);
```
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static SystemTable 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
  - getIterator
```
public Iterator<Object> getIterator(ExecutorFragmentContext context,
                                    int maxRecords)
```
  - getTableName
```
public String getTableName()
```
  - isDistributed
```
public boolean isDistributed()
```
  - getPojoClass
```
public Class<?> getPojoClass()
```
  - 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.

Enum SystemTable

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Enum

Methods inherited from class java.lang.Object

Enum Constant Detail

OPTIONS_OLD

OPTIONS

INTERNAL_OPTIONS_OLD

INTERNAL_OPTIONS

BOOT

DRILLBITS

VERSION

MEMORY

CONNECTIONS

PROFILES

PROFILES_JSON

THREADS

FUNCTIONS

STORAGE_ALIASES

TABLE_ALIASES

Method Detail

values

valueOf

getIterator

getTableName

isDistributed

getPojoClass

digest