执行ALTER TABLE语句修改字段长度: 在StarRocks中,你可以使用ALTER TABLE语句来修改字段的长度。以下是一个示例代码片段,展示了如何将名为my_column的字段的长度修改为VARCHAR(255): sql ALTER TABLE my_table MODIFY COLUMN my_column VARCHAR(255); 请注意,这里的my_table是你要修改的表的名称,my_column是你要...
1.1 Row & Column 一张表包括行(Row)和列(Column)。Row 即用户的一行数据。Column 用于描述一行数据中不同的字段。 ⚫ 在默认的数据模型中,Column 只分为排序列和非排序列。存储引擎会按照排序列对数据进行排序存储,并建立稀疏索引,以便在排序数据上进行快速查找。 ⚫ 而在聚合模型中,Column 可以分为两大类...
ALTER TABLE site_visit DROP COLUMN city;*direct schema change: 无需重新排序,但是需要对数据做一次转换。例如修改列的类型,在稀疏索引中加一列等。 ALTER TABLE site_visit MODIFY COLUMN username varchar(64);*linked schema change: 无需转换数据,直接完成。例如加列操作。 ALTER TABLE site_visit ADD COLUMN...
CREATE TABLE t0(c0 INT, c1 VARCHAR(32)) PRIMARY KEY(c0) DISTRIBUTED BY HASH(c0) BUCKETS 1; INSERT INTO t0 VALUES(1, '10.123'); ALTER TABLE t0 MODIFY c1 DECIMAL(10, 5); SELECT * FROM t0; Expected behavior (Required) Real behavior (Required) BE process crashed. be.out: *** Aborte...
alter table dim_infoflow_authorinfo_test modify COLUMN z_ytag varchar(655);//字段类型长度只能变长,不能缩短。 *** 目前支持以下类型的转换: TINYINT/SMALLINT/INT/BIGINT转换成TINYINT/SMALLINT/INT/BIGINT/DOUBLE; TINTINT/SMALLINT/INT/BIGINT/LARGEINT/FLOAT/DOUBLE/DECIMAL转换成 VARCHAR; VARCHAR支持...
alter table tab1 modify column c1 largeint; function: wait_alter_table_finish() select * from tab1; alter table tab1 add column date1 datetime default current_timestamp; function: wait_alter_table_finish() show create table tab1; drop table tab1; drop database test_fast_schema_evolution_...
“table”: “lcl_test”,“database”: “lcl”,“username”: “xxx”,“password”: “xxx”,“preSql”: [],“postSql”: [],“loadProps”: {“column_separator”: “,”,“row_delimiter”: “\x02”} } } } ],“setting”: {“speed”: {“channel”: “10” } } } } 3.1.2、...
is controlled by the table propertyfast_schema_evolution. After this feature is enabled, the execution efficiency of adding or dropping columns is significantly improved. This mode is disabled by default (Default value isfalse). You cannot modify this property for existing tables using ALTER TABLE....
[Enhancement] Optimize the error output when alter operation is prohi… June 2, 2023 09:29 fs_brokers/apache_hdfs_broker Upgrade jackson Due to CVE-2022-42003 (StarRocks#21176) April 7, 2023 22:00 gensrc [Feature] Support AUTO_INCREMENT column for shared data mode table (S… Ju...
@@ -194,6 +196,131 @@ public void testModifyRelatedColumnWithMv() { } } // Test modify mv with star select by modifying column name. @Test public void testModifyWithSelectStarMV1() throws Exception { try { starRocksAssert.withTable("CREATE TABLE modify_column_test3(k1 int, k2 int,...