~drizzle-trunk/drizzle/development

# 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 datetime 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 datetime 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;