- StarRocks
- Introduction to StarRocks
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- Table Design
- Data Loading
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- Overview of data loading
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- Load data using INSERT
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- ADD SQLBLACKLIST
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- CREATE MATERIALIZED VIEW
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- CREATE RESOURCE
- CREATE TABLE AS SELECT
- CREATE TABLE LIKE
- CREATE TABLE
- CREATE VIEW
- CREATE FUNCTION
- DROP DATABASE
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- DROP MATERIALIZED VIEW
- DROP REPOSITORY
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- DROP TABLE
- DROP VIEW
- DROP FUNCTION
- HLL
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DROP MATERIALIZED VIEW
description
This statement is used to delete a materialized view. Synchronization syntax.
Syntax:
DROP MATERIALIZED VIEW [IF EXISTS] mv_name ON table_name
- IF EXISTS
If the materialized view does not exist, don't throw an error. If this keyword is not declared, an error will be reported if the materialized view does not exist.
- mv_name
The name of the materialized view to be deleted. Required.
- table_name
The name of the table to which the materialized view to be deleted belongs. Required.
example
The structure of the table is as follows:
mysql> desc all_type_table all;
+----------------+-------+----------+------+-------+---------+-------+
| IndexName | Field | Type | Null | Key | Default | Extra |
+----------------+-------+----------+------+-------+---------+-------+
| all_type_table | k1 | TINYINT | Yes | true | N/A | |
| | k2 | SMALLINT | Yes | false | N/A | NONE |
| | k3 | INT | Yes | false | N/A | NONE |
| | k4 | BIGINT | Yes | false | N/A | NONE |
| | k5 | LARGEINT | Yes | false | N/A | NONE |
| | k6 | FLOAT | Yes | false | N/A | NONE |
| | k7 | DOUBLE | Yes | false | N/A | NONE |
| | | | | | | |
| k1_sumk2 | k1 | TINYINT | Yes | true | N/A | |
| | k2 | SMALLINT | Yes | false | N/A | SUM |
+----------------+-------+----------+------+-------+---------+-------+
Drop the materialized view named k1_sumk2 onthe table all_type_table.
drop materialized view k1_sumk2 on all_type_table;
The structure of table whose materialized view is deleted is as follows.
+----------------+-------+----------+------+-------+---------+-------+ | IndexName | Field | Type | Null | Key | Default | Extra | +----------------+-------+----------+------+-------+---------+-------+ | all_type_table | k1 | TINYINT | Yes | true | N/A | | | | k2 | SMALLINT | Yes | false | N/A | NONE | | | k3 | INT | Yes | false | N/A | NONE | | | k4 | BIGINT | Yes | false | N/A | NONE | | | k5 | LARGEINT | Yes | false | N/A | NONE | | | k6 | FLOAT | Yes | false | N/A | NONE | | | k7 | DOUBLE | Yes | false | N/A | NONE | +----------------+-------+----------+------+-------+---------+-------+
Drop a non-existing materialized view on the table all_type_table.
drop materialized view k1_k2 on all_type_table; ERROR 1064 (HY000): errCode = 2, detailMessage = Materialized view [k1_k2] does not exist in table [all_type_table]
The delete request reports an error.
Drop the materialized view k1_k2 on the table all_type_table. No error is reported if Materialized view does not exist.
drop materialized view if exists k1_k2 on all_type_table; Query OK, 0 rows affected (0.00 sec)
If it exists, it will be dropped; If it does not exist, no error will be reported.
keyword
DROP, MATERIALIZED, VIEW