Edit File: innodb_bug51378.test
# This is the test for bug 51378. Unique index created # through "create index" and "alter table add unique index" # interfaces should not be treated as primary index if indexed # columns contain one or more column prefix(es) (only prefix/part of # the column is indexed) # On the other hand, if there is a unique index covers all # columns of a table, and they are non-null columns, and # full length of the column are indexed, then this index # will be created as primary index # Following queries test various scenario, no mismatch # error message should be printed. --source include/have_innodb.inc # Create a table contains a BLOB column create table bug51378 ( col1 int not null, col2 blob not null, col3 time not null) engine = innodb; # Create following unique indexes on 'col1' and 'col2(31)' # of the table, the index should not be treated as primary # key because it indexes only first 31 bytes of col2. # Thus it contains "column prefix", and will not be # upgraded to primary index. # There should not be mismatch message printed in the # errorlog create unique index idx on bug51378(col1, col2(31)); alter table bug51378 add unique index idx2(col1, col2(31)); # Unique index on 'col1' and 'col3' will be created as primary index, # since the index does not contain column prefix create unique index idx3 on bug51378(col1, col3); # Show create table would show idx3 created as unique index, internally, # idx3 is treated as primary index both by MySQL and Innodb SHOW CREATE TABLE bug51378; # "GEN_CLUST_INDEX" will be re-created as default primary index # after idx3 is dropped drop index idx3 on bug51378; SHOW CREATE TABLE bug51378; # Or we can add the primary key through alter table interfaces alter table bug51378 add primary key idx3(col1, col2(31)); SHOW CREATE TABLE bug51378; drop table bug51378; # Or we can create such primary key through create table interfaces create table bug51378 ( col1 int not null, col2 blob not null, col3 time not null, primary key(col1, col2(31))) engine = innodb; # Unique index on one or more column prefix(es) will be created # as non-cluster index create unique index idx on bug51378(col1, col2(31)); SHOW CREATE TABLE bug51378; drop table bug51378; # If a table has a NULLABLE column, unique index on it will not # be treated as primary index. create table bug51378 ( col1 int not null, col2 int ) engine = innodb; # This will be created as non-cluster index since col2 is nullable create unique index idx on bug51378(col1, col2); SHOW CREATE TABLE bug51378; drop table bug51378;
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