- StarRocks
- Introduction to StarRocks
- Quick Start
- Deployment
- Deployment overview
- Prepare
- Deploy
- Deploy shared-nothing StarRocks
- Deploy and use shared-data StarRocks
- Manage
- Table Design
- Understand StarRocks table design
- Table types
- Data distribution
- Data compression
- Sort keys and prefix indexes
- Data Loading
- Concepts
- Overview of data loading
- Load data from a local file system or a streaming data source using HTTP PUT
- Load data from HDFS
- Load data from cloud storage
- Load data from Apache Kafka®
- Continuously load data from Apache Kafka®
- Load data from Apache Spark™
- Load data using INSERT
- Load data using Stream Load transaction interface
- Realtime synchronization from MySQL
- Continuously load data from Apache Flink®
- Change data through loading
- Transform data at loading
- Data Unloading
- Query Data Lakes
- Query Acceleration
- Gather CBO statistics
- Synchronous materialized views
- Asynchronous materialized views
- Colocate Join
- Lateral Join
- Query Cache
- Index
- Computing the Number of Distinct Values
- Sorted streaming aggregate
- Integrations
- Administration
- Management
- Data recovery
- User Privilege and Authentication
- Performance Tuning
- Reference
- SQL Reference
- User Account Management
- Cluster Management
- ADD SQLBLACKLIST
- ADMIN CANCEL REPAIR TABLE
- ADMIN CHECK TABLET
- ADMIN REPAIR TABLE
- ADMIN SET CONFIG
- ADMIN SET REPLICA STATUS
- ADMIN SHOW CONFIG
- ADMIN SHOW REPLICA DISTRIBUTION
- ADMIN SHOW REPLICA STATUS
- ALTER RESOURCE GROUP
- ALTER STORAGE VOLUME
- ALTER SYSTEM
- CANCEL DECOMMISSION
- CREATE FILE
- CREATE RESOURCE GROUP
- CREATE STORAGE VOLUME
- DELETE SQLBLACKLIST
- DESC STORAGE VOLUME
- DROP FILE
- DROP RESOURCE GROUP
- DROP STORAGE VOLUME
- EXPLAIN
- INSTALL PLUGIN
- KILL
- SET
- SET DEFAULT STORAGE VOLUME
- SHOW BACKENDS
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- SHOW INDEX
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- SHOW RESOURCE GROUP
- SHOW SQLBLACKLIST
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- UNINSTALL PLUGIN
- DDL
- ALTER DATABASE
- ALTER MATERIALIZED VIEW
- ALTER TABLE
- ALTER VIEW
- ALTER RESOURCE
- ANALYZE TABLE
- BACKUP
- CANCEL ALTER TABLE
- CANCEL BACKUP
- CANCEL RESTORE
- CREATE ANALYZE
- CREATE DATABASE
- CREATE EXTERNAL CATALOG
- CREATE FUNCTION
- CREATE INDEX
- CREATE MATERIALIZED VIEW
- CREATE REPOSITORY
- CREATE RESOURCE
- CREATE TABLE
- CREATE TABLE AS SELECT
- CREATE TABLE LIKE
- CREATE VIEW
- DROP ANALYZE
- DROP CATALOG
- DROP DATABASE
- DROP FUNCTION
- DROP INDEX
- DROP MATERIALIZED VIEW
- DROP REPOSITORY
- DROP RESOURCE
- DROP STATS
- DROP TABLE
- DROP VIEW
- HLL
- KILL ANALYZE
- RECOVER
- REFRESH EXTERNAL TABLE
- RESTORE
- SET CATALOG
- SHOW ANALYZE JOB
- SHOW ANALYZE STATUS
- SHOW FUNCTION
- SHOW META
- SHOW RESOURCES
- TRUNCATE TABLE
- USE
- DML
- ALTER LOAD
- ALTER ROUTINE LOAD
- BROKER LOAD
- CANCEL LOAD
- CANCEL EXPORT
- CANCEL REFRESH MATERIALIZED VIEW
- CREATE ROUTINE LOAD
- DELETE
- DROP TASK
- EXPORT
- GROUP BY
- INSERT
- PAUSE ROUTINE LOAD
- REFRESH MATERIALIZED VIEW
- RESUME ROUTINE LOAD
- SELECT
- SHOW ALTER TABLE
- SHOW ALTER MATERIALIZED VIEW
- SHOW BACKUP
- SHOW CATALOGS
- SHOW CREATE CATALOG
- SHOW CREATE DATABASE
- SHOW CREATE MATERIALIZED VIEW
- SHOW CREATE TABLE
- SHOW CREATE VIEW
- SHOW DATA
- SHOW DATABASES
- SHOW DELETE
- SHOW DYNAMIC PARTITION TABLES
- SHOW EXPORT
- SHOW LOAD
- SHOW MATERIALIZED VIEWS
- SHOW PARTITIONS
- SHOW PROPERTY
- SHOW REPOSITORIES
- SHOW RESTORE
- SHOW ROUTINE LOAD
- SHOW ROUTINE LOAD TASK
- SHOW SNAPSHOT
- SHOW TABLES
- SHOW TABLET
- SHOW TRANSACTION
- SPARK LOAD
- STOP ROUTINE LOAD
- STREAM LOAD
- SUBMIT TASK
- UPDATE
- Auxiliary Commands
- Data Types
- Keywords
- Function Reference
- Function list
- Java UDFs
- Window functions
- Lambda expression
- Aggregate Functions
- any_value
- approx_count_distinct
- array_agg
- avg
- bitmap
- bitmap_agg
- count
- corr
- covar_pop
- covar_samp
- group_concat
- grouping
- grouping_id
- hll_empty
- hll_hash
- hll_raw_agg
- hll_union
- hll_union_agg
- max
- max_by
- min
- min_by
- multi_distinct_sum
- multi_distinct_count
- percentile_approx
- percentile_cont
- percentile_disc
- retention
- stddev
- stddev_samp
- sum
- variance, variance_pop, var_pop
- var_samp
- window_funnel
- Array Functions
- all_match
- any_match
- array_agg
- array_append
- array_avg
- array_concat
- array_contains
- array_contains_all
- array_cum_sum
- array_difference
- array_distinct
- array_filter
- array_generate
- array_intersect
- array_join
- array_length
- array_map
- array_max
- array_min
- array_position
- array_remove
- array_slice
- array_sort
- array_sortby
- array_sum
- arrays_overlap
- array_to_bitmap
- cardinality
- element_at
- reverse
- unnest
- Bit Functions
- Bitmap Functions
- base64_to_bitmap
- bitmap_agg
- bitmap_and
- bitmap_andnot
- bitmap_contains
- bitmap_count
- bitmap_from_string
- bitmap_empty
- bitmap_has_any
- bitmap_hash
- bitmap_intersect
- bitmap_max
- bitmap_min
- bitmap_or
- bitmap_remove
- bitmap_subset_in_range
- bitmap_subset_limit
- bitmap_to_array
- bitmap_to_base64
- bitmap_to_string
- bitmap_union
- bitmap_union_count
- bitmap_union_int
- bitmap_xor
- intersect_count
- sub_bitmap
- to_bitmap
- JSON Functions
- Overview of JSON functions and operators
- JSON operators
- JSON constructor functions
- JSON query and processing functions
- Map Functions
- Binary Functions
- Conditional Functions
- Cryptographic Functions
- Date Functions
- add_months
- adddate
- convert_tz
- current_date
- current_time
- current_timestamp
- date
- date_add
- date_diff
- date_format
- date_slice
- date_sub, subdate
- date_trunc
- datediff
- day
- dayname
- dayofmonth
- dayofweek
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- days_add
- days_diff
- days_sub
- from_days
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- hour
- hours_add
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- hours_sub
- last_day
- makedate
- microseconds_add
- microseconds_sub
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- minutes_add
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- minutes_sub
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- to_date
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- weekofyear
- weeks_add
- day_of_week_iso
- weeks_diff
- weeks_sub
- year
- years_add
- years_diff
- years_sub
- Geographic Functions
- Math Functions
- String Functions
- append_trailing_char_if_absent
- ascii
- char
- char_length
- character_length
- concat
- concat_ws
- ends_with
- find_in_set
- group_concat
- hex
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- instr
- lcase
- left
- length
- locate
- lower
- lpad
- ltrim
- money_format
- null_or_empty
- parse_url
- repeat
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- reverse
- right
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- space
- split
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- starts_with
- strleft
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- str_to_map
- substring
- trim
- ucase
- unhex
- upper
- url_decode
- url_encode
- Pattern Matching Functions
- Percentile Functions
- Scalar Functions
- Struct Functions
- Table Functions
- Utility Functions
- cast function
- hash function
- AUTO_INCREMENT
- Generated columns
- System variables
- User-defined variables
- Error code
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- SQL Reference
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ALTER MATERIALIZED VIEW
Description
This SQL statement can:
Alter the name of an asynchronous materialized view.
Alter the refresh strategy of an asynchronous materialized view.
Alter the status of an asynchronous materialized view to active or inactive.
Perform an atomic swap between two asynchronous materialized views.
Alter the properties of an asynchronous materialized view.
You can use this SQL statement to alter the following properties:
partition_ttl_number
partition_refresh_number
resource_group
auto_refresh_partitions_limit
excluded_trigger_tables
mv_rewrite_staleness_second
unique_constraints
foreign_key_constraints
colocate_with
- All session variable-related properties. For information on session variables, see System variables。
Syntax
ALTER MATERIALIZED VIEW [db_name.]<mv_name>
{ RENAME [db_name.]<new_mv_name>
| REFRESH <new_refresh_scheme_desc>
| ACTIVE | INACTIVE
| SWAP WITH [db_name.]<mv2_name>
| SET ( "<key>" = "<value>"[,...]) }
Parameters in brackets [] is optional.
Parameters
Parameter | Required | Description |
---|---|---|
mv_name | yes | The name of the materialized view to alter. |
new_refresh_scheme_desc | no | New refresh strategy, see SQL Reference - CREATE MATERIALIZED VIEW - Parameters for details. |
new_mv_name | no | New name for the materialized view. |
ACTIVE | no | Set the status of the materialized view to active. StarRocks automatically sets a materialized view to inactive if any of its base tables is changed, for example, dropped and re-created, to prevent the situation that original metadata mismatches the changed base table. Inactive materialized views cannot be used for query acceleration or query rewrite. You can use this SQL to activate the materialized view after changing the base tables. |
INACTIVE | no | Set the status of the materialized view to inactive. An inactive asynchronous materialized view cannot be refreshed. But you can still query it as a table. |
SWAP WITH | no | Perform an atomic exchange with another asynchronous materialized view after necessary consistency checks. |
key | no | The name of the property to alter, see SQL Reference - CREATE MATERIALIZED VIEW - Parameters for details. NOTE If you want to alter a session variable-related property of the materialized view, you must add a session. prefix to the property, for example, session.query_timeout . You do not need to specify the prefix for non-session properties, for example, mv_rewrite_staleness_second . |
value | no | The value of the property to alter. |
Example
Example 1: Alter the name of the materialized view.
ALTER MATERIALIZED VIEW lo_mv1 RENAME lo_mv1_new_name;
Example 2: Alter the refresh interval of the materialized view.
ALTER MATERIALIZED VIEW lo_mv2 REFRESH ASYNC EVERY(INTERVAL 1 DAY);
Example 3: Alter the materialized view's properties.
-- Change mv1's query_timeout to 40000 seconds.
ALTER MATERIALIZED VIEW mv1 SET ("session.query_timeout" = "40000");
-- Change mv1's mv_rewrite_staleness_second to 600 seconds.
ALTER MATERIALIZED VIEW mv1 SET ("mv_rewrite_staleness_second" = "600");
Example 4: Alter the materialized view's status to active.
ALTER MATERIALIZED VIEW order_mv ACTIVE;
Example 5: Perform an atomic exchange between materialized views order_mv
and order_mv1
.
ALTER MATERIALIZED VIEW order_mv SWAP WITH order_mv1;