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78 lines
2.5 KiB
Plaintext
78 lines
2.5 KiB
Plaintext
# This is the test for bug 51378. Unique index created
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# through "create index" and "alter table add unique index"
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# interfaces should not be treated as primary index if indexed
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# columns contain one or more column prefix(es) (only prefix/part of
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# the column is indexed)
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# On the other hand, if there is a unique index covers all
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# columns of a table, and they are non-null columns, and
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# full length of the column are indexed, then this index
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# will be created as primary index
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# Following queries test various scenario, no mismatch
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# error message should be printed.
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--source include/have_innodb.inc
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# Create a table contains a BLOB column
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create table bug51378 (
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col1 int not null,
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col2 blob not null,
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col3 time not null) engine = innodb;
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# Create following unique indexes on 'col1' and 'col2(31)'
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# of the table, the index should not be treated as primary
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# key because it indexes only first 31 bytes of col2.
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# Thus it contains "column prefix", and will not be
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# upgraded to primary index.
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# There should not be mismatch message printed in the
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# errorlog
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create unique index idx on bug51378(col1, col2(31));
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alter table bug51378 add unique index idx2(col1, col2(31));
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# Unique index on 'col1' and 'col3' will be created as primary index,
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# since the index does not contain column prefix
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create unique index idx3 on bug51378(col1, col3);
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# Show create table would show idx3 created as unique index, internally,
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# idx3 is treated as primary index both by MySQL and Innodb
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SHOW CREATE TABLE bug51378;
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# "GEN_CLUST_INDEX" will be re-created as default primary index
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# after idx3 is dropped
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drop index idx3 on bug51378;
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SHOW CREATE TABLE bug51378;
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# Or we can add the primary key through alter table interfaces
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alter table bug51378 add primary key idx3(col1, col2(31));
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SHOW CREATE TABLE bug51378;
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drop table bug51378;
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# Or we can create such primary key through create table interfaces
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create table bug51378 (
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col1 int not null,
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col2 blob not null,
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col3 time not null, primary key(col1, col2(31))) engine = innodb;
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# Unique index on one or more column prefix(es) will be created
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# as non-cluster index
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create unique index idx on bug51378(col1, col2(31));
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SHOW CREATE TABLE bug51378;
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drop table bug51378;
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# If a table has a NULLABLE column, unique index on it will not
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# be treated as primary index.
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create table bug51378 (
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col1 int not null,
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col2 int ) engine = innodb;
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# This will be created as non-cluster index since col2 is nullable
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create unique index idx on bug51378(col1, col2);
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SHOW CREATE TABLE bug51378;
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drop table bug51378;
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