# Remove this line after fixing bug#29888076.
--source include/not_solaris.inc

--echo ########################################################################
--echo #
--echo # Verify definitions of I_S system views.
--echo # --------------------------------------
--echo # This test has three parts:
--echo #
--echo # 1. Verify the existence of the expected I_S system views, neither less
--echo #    nor more.
--echo # 2. Verify the I_S_VERSION and the CREATE VIEW statements of the
--echo #    I_S system views.
--echo # 3. Verify the checksum of the generated meta data associated with the
--echo #    current I_S version number.
--echo #
--echo ########################################################################
--echo #
--echo # A note regarding the checksum usage.
--echo # ------------------------------------
--echo # This is based on a test by Marc Alff (perfschema.dd_version_check).
--echo # The idea is to keep a record of each I_S version released with the
--echo # I_S version number and a checksum created based on the meta data for
--echo # the I_S views. It is important not to change the expected checksum
--echo # once a release has been published.
--echo #
--echo # If there was an intentional change, leading to a new checksum, then:
--echo #
--echo # 1. Uncomment the debug output showing the low level meta data and
--echo #    verify that the changes are intentional.
--echo # 2. Create a new target I_S version (unless the existing target IS
--echo #    version is not publicly released yet).
--echo # 3. Add a new row in test.I_S_published_schema with the new target
--echo #    I_S version and the new checksum (or update the expected
--echo #    checksum if the target I_S version is not publicly released yet).
--echo #
--echo # Note that a failure to do 2, when doing 3, will result in a broken
--echo # upgrade where the server code is expecting a certain I_S system view
--echo # definition, while the actual persisted I_S system view definition is
--echo # different (because it was created by a previous server binary, and
--echo # I_S upgrade handling was not triggered).
--echo #
--echo # Thus, this part of the test is designed to be a reminder to do 2.
--echo # by detecting differences in 3.
--echo #
--echo ########################################################################
--echo #
--echo # How to handle test failures.
--echo # ----------------------------
--echo # In general, if there is a change leading to a failure in this test,
--echo # then we must first consider whether the change is intentional, i.e.,
--echo # whether there is a change in a I_S system view definition that
--echo # that we actually want to do, or whether the change is by mistake
--echo # or not needed.
--echo #
--echo # Then, if the change is intentional, we must make sure the following
--echo # scenarios are handled:
--echo #
--echo # 1. Plain initialization of the server. This is most likely handled,
--echo #    otherwise we wouldn't even get to the point where this test starts
--echo #    failing.
--echo # 2. Plain server restart using a data directory initialized by this
--echo #    server.
--echo # 3. Upgrade from any supported I_S version, or server restart using
--echo #    a data directory from a different server version using the same
--echo #    I_S version.
--echo #
--echo # Failures in the different parts of the test must be handled as
--echo # follows:
--echo #
--echo # *  A failure in part 1 means that a I_S system view is added or removed.
--echo #    In this case, please make sure the tables 'I_S_view_names'
--echo #    below are kept up to date. Also make sure that
--echo #    the list of SHOW CREATE VIEW statements is up to date.
--echo # *  A failure in part 2 or 3 means that there is a change in the I_S
--echo #    system view definitions, and that we have a new I_S version. So
--echo #    if the current target I_S version number is released publicly,
--echo #    then we must bump the target I_S version. If the I_S version is
--echo #    not yet released, and has already been bumped, then it should
--echo #    stay the same. This test must have its results re-recorded. A
--echo #    failure in part 1 or 2 will most likely also lead to a failure
--echo #    in part 3.
--echo # *  A failure in part 3 means that the generated meta data is
--echo #    different than it used to be. If there is a change in part 1 or
--echo #    2, this is to be expected. In that case, the test results must
--echo #    be re-recorded, and we must either update the expected checksum
--echo #    (if the I_S version stays the same) or add the new I_S version
--echo #    along with the expected checksum. However, if there is not a
--echo #    change in part 1 or 2, then we have changes in the SQL DDL
--echo #    semantics. This should be handled by changing the I_S initialization
--echo #    procedure to either tweak the view statements before execution
--echo #    by tweaking the generated low level meta data. Either way, the 
--echo #    result of the changes to the server code should be that
--echo #    this test stops failing.
--echo ########################################################################

--source include/have_debug.inc

# Total number of system views in MySQL server.
let $expected_system_view_count = 32;

--echo ########################################################################
--echo # PART 1
--echo # Verify the existence of the expected I_S system views, neither less
--echo ########################################################################
let $I_S_view_names = test.I_S_view_names;
# Create table to hold the I_S view names, they are needed later in this test.
eval CREATE TABLE $I_S_view_names (name VARCHAR(64) PRIMARY KEY);
--source include/i_s_schema_assert_and_fill_table_names.inc

--echo ########################################################################
--echo # PART 2. Verify the I_S_VERSION and the CREATE VIEW statements of the
--echo #         I_S system views.
--echo ########################################################################
# We also store the defs in following table in order to calculate the
# checksum later.
CREATE TABLE I_S_check_table (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
   t TEXT NOT NULL,
   row_hash VARCHAR(64) DEFAULT NULL);
--source include/i_s_schema_dump_table_defs_debug.inc

--echo ########################################################################
--echo # PART 3. Verify the checksum of the generated meta data associated with
--echo #         the current I_S version number.
--echo ########################################################################

SET debug = '+d,skip_dd_table_access_check';
--disable_query_log

# Verify number of system views stored in DD.
let $system_view_count_in_dd = `SELECT count(id) FROM mysql.tables
  WHERE type = 'SYSTEM VIEW' AND CHAR_LENGTH(view_definition_utf8)>0 AND
  name IN (SELECT name FROM $I_S_view_names)`;
let $assert_cond = "$system_view_count_in_dd" = "$expected_system_view_count";
--let $assert_text = Found expected number of system views in DD.
--source include/assert.inc

# Make sure that we have checksum of all system view definitions that are
# stored in I_S_check_table().
let $actual_system_view_count = `SELECT COUNT(*) from I_S_check_table`;
let $assert_cond = "$actual_system_view_count" = "$expected_system_view_count";
--let $assert_text = Found expected number of system views in I_S_check_table.
--source include/assert.inc

# Schema meta data excluding timestamps. Id is fixed even across versions.
INSERT INTO I_S_check_table(t)
  SELECT CONCAT(id, '-', catalog_id, '-',
    name, '-', default_collation_id, '-',
    IFNULL(options, 'NULL'))
  FROM mysql.schemata
  WHERE name = 'information_schema';

# Expression representing the I_S view ids
let $I_S_view_ids = SELECT id FROM mysql.tables
  WHERE type = 'SYSTEM VIEW' AND CHAR_LENGTH(view_definition_utf8)>0 AND
  name IN (SELECT name FROM $I_S_view_names);

# definitions from views
eval INSERT INTO I_S_check_table(t)
  SELECT CONCAT(id, '-', name, '-', type, '-',
    IFNULL(collation_id,'NULL'), '-',
    comment, '-', hidden, '-',
    view_check_option, '-',
    view_is_updatable, '-',
    view_algorithm, '-',
    view_security_type, '-',
    view_definer, '-',
    view_client_collation_id, '-',
    view_connection_collation_id, '-',
    IFNULL(view_column_names,'NULL'))
  FROM mysql.tables
  WHERE id IN ($I_S_view_ids)
  ORDER BY id;

# Subset of definitions from columns, not including
# default_values.
eval INSERT INTO I_S_check_table(t)
  SELECT CONCAT(id, '-', table_id, '-', name, '-',
    ordinal_position, '-', type, '-', is_nullable, '-',
    IFNULL(is_zerofill, 'NULL'), '-',
    IFNULL(is_unsigned, 'NULL'), '-',
    IFNULL(char_length, 'NULL'), '-',
    IFNULL(numeric_precision, 'NULL'), '-',
    IFNULL(numeric_scale, 'NULL'), '-',
    IFNULL(datetime_precision, 'NULL'), '-',
    IFNULL(collation_id, 'NULL'), '-',
    IFNULL(default_option, 'NULL'), '-',
    IFNULL(update_option, 'NULL'), '-',
    IFNULL(is_auto_increment, 'NULL'), '-',
    comment, '-',
    hidden, '-',
    IFNULL(options, 'NULL'), '-',
    IFNULL(se_private_data, 'NULL'))
  FROM mysql.columns
  WHERE table_id IN ($I_S_view_ids)
  ORDER BY id;


# Create checksums for each row.
UPDATE I_S_check_table SET row_hash = SHA2(t, 256);

# And then a checksum of all rows. We need about 1500 rows of varchar(64)
# concatenated.
SET @old_group_concat_max_len = @@group_concat_max_len;
SET group_concat_max_len = 100000;

CREATE TABLE whole_schema(row_checksums LONGTEXT, checksum VARCHAR(64));
INSERT INTO whole_schema (row_checksums)
  SELECT GROUP_CONCAT(row_hash ORDER BY id)
    FROM I_S_check_table;
UPDATE whole_schema SET checksum = SHA2(row_checksums, 256);

let $assert_cond = "[SELECT LENGTH(row_checksums) FROM whole_schema]"
                    < @@group_concat_max_len;
--let $assert_text = The group concat max length is sufficient.
--source include/assert.inc

# Insert historical records of I_S version numbers and checksums. For a
# new I_S version, add a new row below. Please read the comments at the
# beginning of the test file to make sure this is done correctly. Note
# that the checksums are different depending on case sensitivity of the
# underlying file system. Hence, the lctn field is used as a discriminator
# (lctn = lower case table names).

CREATE TABLE I_S_published_schema(
  version VARCHAR(20),
  lctn BOOL,
  checksum VARCHAR(64),
  PRIMARY KEY (version, lctn));

# Checksums with ids.
INSERT INTO I_S_published_schema
  VALUES ('80017', 0,
    '172ff4fb1366414e3fb16c0175eefe861a493dab30d59e299f6186f4abc8d13a');
INSERT INTO I_S_published_schema
  VALUES ('80017', 1,
    '23dbc025dda0dfba52a9e9f09061290347c868735a01258396a55525e894b69b');
INSERT INTO I_S_published_schema
  VALUES ('80018', 0,
    'b0077c83e03d640dcf26fc717accd5081269ea7ff3e6c3282914380a1246c1af');
INSERT INTO I_S_published_schema
  VALUES ('80018', 1,
    'ca7b69e91a233bab7856f491e7dab6caff7f0fd4f56218ece438e95375ff2392');

SELECT IFNULL(CONCAT('The schema checksum corresponds to I_S version ',
                     version, '.'),
              CONCAT('No I_S version found with schema checksum ',
                     whole_schema.checksum, '.')) AS CHECK_STATUS
  FROM I_S_published_schema
    RIGHT OUTER JOIN whole_schema
    ON I_S_published_schema.checksum= whole_schema.checksum;

# Please read the comments at the beginning of the test file to make sure an
# error in the assert below is handled correctly.

let $assert_cond = "[SELECT COUNT(version)
                       FROM I_S_published_schema, whole_schema
                       WHERE I_S_published_schema.checksum =
                             whole_schema.checksum
                       AND lctn = @@global.lower_case_file_system]" = 1;
--let $assert_text = The schema checksum corresponds to a known I_S version.
--source include/assert.inc

SET group_concat_max_len = @old_group_concat_max_len;
eval DROP TABLES I_S_check_table, whole_schema, I_S_published_schema,
            $I_S_view_names;
SET debug = '-d,skip_dd_table_access_check';

--enable_query_log