DROP MATERIALIZED VIEW
Remove the named materialized view in Cassandra 3.0 and later.
Immediate, irreversible removal of a materialized view, including all data it contains. This operation has no effect on the base table.
Restriction: Drop all materialized views associated with a base table before
dropping the table.
Synopsis
DROP MATERIALIZED VIEW [IF EXISTS] [keyspace_name.] view_name| Syntax conventions | Description |
|---|---|
| UPPERCASE | Literal keyword. |
| Lowercase | Not literal. |
Italics |
Variable value. Replace with a user-defined value. |
[] |
Optional. Square brackets ( [] ) surround optional command
arguments. Do not type the square brackets. |
( ) |
Group. Parentheses ( ( ) ) identify a group to choose from. Do
not type the parentheses. |
| |
Or. A vertical bar ( | ) separates alternative elements. Type
any one of the elements. Do not type the vertical bar. |
... |
Repeatable. An ellipsis ( ... ) indicates that you can repeat
the syntax element as often as required. |
'Literal string' |
Single quotation ( ' ) marks must surround literal strings in
CQL statements. Use single quotation marks to preserve upper case. |
{ key : value } |
Map collection. Braces ( { } ) enclose map collections or key
value pairs. A colon separates the key and the value. |
<datatype1,datatype2> |
Set, list, map, or tuple. Angle brackets ( < > ) enclose
data types in a set, list, map, or tuple. Separate the data types with a comma.
|
cql_statement; |
End CQL statement. A semicolon ( ; ) terminates all CQL
statements. |
[--] |
Separate the command line options from the command arguments with two hyphens (
-- ). This syntax is useful when arguments might be mistaken for
command line options. |
' <schema> ... </schema> ' |
Search CQL only: Single quotation marks ( ' ) surround an
entire XML schema declaration. |
@xml_entity='xml_entity_type' |
Search CQL only: Identify the entity and literal value to overwrite the XML element in the schema and solrConfig files. |
- IF EXISTS
- Cassandra checks on whether the specified materialized view exists. If the materialized view does not exist, the operation fails. Optional.
- keyspace_name
- To drop a materialized view in a keyspace other than the current keyspace, put the keyspace name in front of the materialized view name, followed by a period.
- view_name
- The name of the materialized view to drop
Example
DROP MATERIALIZED VIEW cycling.cyclist_by_age;