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Introduced new alter algorithm type called NOCOPY & INSTANT for inplace alter operation. NOCOPY - Algorithm refuses any alter operation that would rebuild the clustered index. It is a subset of INPLACE algorithm. INSTANT - Algorithm allow any alter operation that would modify only meta data. It is a subset of NOCOPY algorithm. Introduce new variable called alter_algorithm. The values are DEFAULT(0), COPY(1), INPLACE(2), NOCOPY(3), INSTANT(4) Message to deprecate old_alter_table variable and make it alias for alter_algorithm variable. alter_algorithm variable for slave is always set to default.
12 lines
355 B
Plaintext
12 lines
355 B
Plaintext
--- alter_instant.result 2018-04-10 11:19:46.299868465 +0530
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+++ alter_instant.reject 2018-04-10 11:22:19.433617807 +0530
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@@ -8,7 +8,7 @@
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INSERT INTO t1(f1, f2) VALUES(1, 1);
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select @@alter_algorithm;
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@@alter_algorithm
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-NOCOPY
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+INPLACE
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# Add column at the end of the table
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ALTER TABLE t1 ADD COLUMN f4 char(100) default "BIG WALL";
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affected rows: 0
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