Package org.apache.cassandra.schema

Class SchemaKeyspaceTables

java.lang.Object

org.apache.cassandra.schema.SchemaKeyspaceTables

public class SchemaKeyspaceTables
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final String	AGGREGATES
static final com.google.common.collect.ImmutableList<String>	ALL	The order in this list matters.
static final String	COLUMN_MASKS
static final String	COLUMNS
static final String	DROPPED_COLUMNS
static final String	FUNCTIONS
static final String	INDEXES
static final String	KEYSPACES
static final String	TABLES
static final String	TRIGGERS
static final String	TYPES
static final String	VIEWS

Constructor Summary

Constructors

Constructor	Description
SchemaKeyspaceTables()

Method Summary

Methods inherited from class java.lang.Object

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

Field Details

KEYSPACES

public static final String KEYSPACES

See Also:

• Constant Field Values

TABLES

public static final String TABLES

See Also:

• Constant Field Values

COLUMNS

public static final String COLUMNS

See Also:

• Constant Field Values

COLUMN_MASKS

public static final String COLUMN_MASKS

See Also:

• Constant Field Values

DROPPED_COLUMNS

public static final String DROPPED_COLUMNS

See Also:

• Constant Field Values

TRIGGERS

public static final String TRIGGERS

See Also:

• Constant Field Values

VIEWS

public static final String VIEWS

See Also:

• Constant Field Values

TYPES

public static final String TYPES

See Also:

• Constant Field Values

FUNCTIONS

public static final String FUNCTIONS

See Also:

• Constant Field Values

AGGREGATES

public static final String AGGREGATES

See Also:

• Constant Field Values

INDEXES

public static final String INDEXES

See Also:

• Constant Field Values

ALL

public static final com.google.common.collect.ImmutableList<String> ALL

The order in this list matters. When flushing schema tables, we want to flush them in a way that mitigates the effects of an abrupt shutdown whilst the tables are being flushed. On startup, we load the schema from disk before replaying the CL, so we need to try to avoid problems like reading a table without columns or types, for example. So columns and types should be flushed before tables, which should be flushed before keyspaces. When truncating, the order should be reversed. For immutable lists this is an efficient operation that simply iterates in reverse order. See CASSANDRA-12213 for more details.

Constructor Details

SchemaKeyspaceTables

public SchemaKeyspaceTables()