doris/ALTER-TABLE-PROPERTY.md at 4ccaa0dfc5a95c19f3e4618f4e2fa7df8b392ec9

Files

Mingyu Chen 74a482ca7f [fix] fix docs build bug (#9293 )

After this PR #9272, the `docs/build_help_zip.sh` will run failed.
This PR fix this issue.
But the help module still has some parse problem, I will fix it in next PR.

This CL mainly changes:
1. fix `docs/build_help_zip.sh` error
2. remove `sql-reference-v2` to `sql-reference`
3. modify build extension github action to run `docs/build_help_zip.sh`

2022-04-28 22:19:04 +08:00

5.9 KiB

Raw Blame History

title, language

title	language
ALTER-TABLE-PROPERTY	en

ALTER-TABLE-PROPERTY

Name

ALTER TABLE PROPERTY

Description

This statement is used to modify the properties of an existing table. This operation is synchronous, and the return of the command indicates the completion of the execution.

grammar:

ALTER TABLE [database.]table alter_clause;

The alter_clause of property supports the following modification methods

Modify the bloom filter column of the table

ALTER TABLE example_db.my_table SET ("bloom_filter_columns"="k1,k2,k3");

Can also be incorporated into the schema change operation above (note that the syntax for multiple clauses is slightly different)

ALTER TABLE example_db.my_table
DROP COLUMN col2
PROPERTIES ("bloom_filter_columns"="k1,k2,k3");

Modify the Colocate property of the table

ALTER TABLE example_db.my_table set ("colocate_with" = "t1");

Change the bucketing method of the table from Hash Distribution to Random Distribution

ALTER TABLE example_db.my_table set ("distribution_type" = "random");

Modify the dynamic partition attribute of the table (support adding dynamic partition attribute to the table without dynamic partition attribute)

ALTER TABLE example_db.my_table set ("dynamic_partition.enable" = "false");

If you need to add dynamic partition attributes to tables without dynamic partition attributes, you need to specify all dynamic partition attributes (Note: adding dynamic partition attributes is not supported for non-partitioned tables)

ALTER TABLE example_db.my_table set ("dynamic_partition.enable" = "true", "dynamic_partition.time_unit" = "DAY", "dynamic_partition.end" = "3", "dynamic_partition.prefix" = "p", "dynamic_partition. buckets" = "32");

Modify the in_memory attribute of the table

ALTER TABLE example_db.my_table set ("in_memory" = "true");

Enable batch delete function

ALTER TABLE example_db.my_table ENABLE FEATURE "BATCH_DELETE";

Enable the function of ensuring the import order according to the value of the sequence column

ALTER TABLE example_db.my_table ENABLE FEATURE "SEQUENCE_LOAD" WITH PROPERTIES ("function_column.sequence_type" = "Date");

Change the default number of buckets for the table to 50

ALTER TABLE example_db.my_table MODIFY DISTRIBUTION DISTRIBUTED BY HASH(k1) BUCKETS 50;

Modify table comments

ALTER TABLE example_db.my_table MODIFY COMMENT "new comment";

Modify column comments

ALTER TABLE example_db.my_table MODIFY COLUMN k1 COMMENT "k1", MODIFY COLUMN k2 COMMENT "k2";

Modify the engine type

ALTER TABLE example_db.mysql_table MODIFY ENGINE TO odbc PROPERTIES("driver" = "MySQL");

Example

Modify the bloom filter column of the table

ALTER TABLE example_db.my_table SET ("bloom_filter_columns"="k1,k2,k3");