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45 lines
2.3 KiB
Text
45 lines
2.3 KiB
Text
create table t1(id int auto_increment primary key, handle int, data bigint not null default 0) engine = innodb;
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insert into t1(handle) values(12),(54),(NULL);
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select *, md5(handle) from t1;
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id handle data md5(handle)
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1 12 0 c20ad4d76fe97759aa27a0c99bff6710
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2 54 0 a684eceee76fc522773286a895bc8436
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3 NULL 0 NULL
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alter table t1 add index handle(handle), algorithm=inplace;
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alter table t1 add column hash varchar(32) as (md5(handle)) persistent, algorithm=inplace;
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ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY
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alter table t1 add column hash varchar(32) as (md5(handle)) persistent, add unique index hash(hash), algorithm=inplace;
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ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY
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alter table t1 add column hash varchar(32) as (md5(handle)) persistent, add unique index hash(hash), algorithm=copy;
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select * from t1;
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id handle data hash
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1 12 0 c20ad4d76fe97759aa27a0c99bff6710
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2 54 0 a684eceee76fc522773286a895bc8436
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3 NULL 0 NULL
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alter table t1 modify column hash varchar(32) as (md5(handle+1)) persistent, algorithm=inplace;
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ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY
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alter table t1 modify column hash varchar(32) as (md5(handle+1)) persistent, algorithm=copy;
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select * from t1;
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id handle data hash
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1 12 0 c51ce410c124a10e0db5e4b97fc2af39
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2 54 0 b53b3a3d6ab90ce0268229151c9bde11
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3 NULL 0 NULL
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alter table t1 modify column handle int not null, algorithm=inplace;
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ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY
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SET STATEMENT sql_mode = 'NO_ENGINE_SUBSTITUTION' FOR
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alter table t1 modify column handle int not null, algorithm=copy;
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Warnings:
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Warning 1265 Data truncated for column 'handle' at row 3
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select * from t1;
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id handle data hash
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1 12 0 c51ce410c124a10e0db5e4b97fc2af39
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2 54 0 b53b3a3d6ab90ce0268229151c9bde11
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3 0 0 c4ca4238a0b923820dcc509a6f75849b
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alter table t1 drop index handle, algorithm=inplace;
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create index data on t1(data) algorithm=inplace;
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alter table t1 drop column data, algorithm=inplace;
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alter table t1 add column sha varchar(32) as (sha1(handle)) persistent, algorithm=inplace;
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ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY
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alter table t1 add column sha varchar(32), algorithm=inplace;
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alter table t1 drop column hash, algorithm=inplace;
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drop table t1;
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