########### suite/funcs_1/datadict/processlist_val.inc #################
#                                                                      #
# Testing of values within INFORMATION_SCHEMA.PROCESSLIST              #
#                                                                      #
# Ensure that the values fit to the current event of the connection    #
# and especially that they change if a connection does nothing or      #
# runs some SQL.                                                       #
# Examples:                                                            #
# - change the default database                                        #
# - send some time no SQL command to the server                        #
# - send a long running query                                          #
#                                                                      #
# Note(mleich):                                                        #
# 1. Please inform me if this test fails because of timing problems.   #
#    I tried to avoid instabilities but the values within the column   #
#    TIME are very sensible to fluctuations of the machine load.       #
#    I had to unify some TIME values with "--replace_result" in cases  #
#    where they are too unstable.                                      #
# 2. Storage engine variants of this test do not make sense.           #
#    -  I_S tables use the MEMORY storage engine whenever possible.    #
#    -  There are some I_S table which need column data types which    #
#       are not supported by MEMORY. Example: LONGTEXT/BLOB            #
#       MyISAM will be used for such tables.                           #
#       The column PROCESSLIST.INFO is of data type LONGTEXT           #
#           ----> MyISAM                                               #
#    -  There is no impact of the GLOBAL(server) or SESSION default    #
#       storage engine setting on the engine used for I_S tables.      #
#       That means we cannot get NDB or InnoDB instead.                #
# 3. The SHOW (FULL) PROCESSLIST command are for comparison.           #
#    The main test target is INFORMATION_SCHEMA.PROCESSLIST !          #
#                                                                      #
# Creation:                                                            #
# 2007-08-09 mleich Implement this test as part of                     #
#                   WL#3982 Test information_schema.processlist        #
# 2008-01-05 HHunger Changed time test and long statement test.        #
#                    It could happen that the long statement test      #
#                    fail due to timing problems.                      #          #                                                                      #
########################################################################

# Basic preparations
--disable_abort_on_error
DROP USER ddicttestuser1@'localhost';
--enable_abort_on_error
CREATE USER ddicttestuser1@'localhost';
GRANT ALL ON *.* TO ddicttestuser1@'localhost';
REVOKE PROCESS ON *.* FROM ddicttestuser1@'localhost';
SET PASSWORD FOR ddicttestuser1@'localhost' = PASSWORD('ddictpass');
--disable_warnings
DROP TABLE IF EXISTS test.t1;
--enable_warnings
CREATE TABLE test.t1 (f1 BIGINT);


# Show the definition of the PROCESSLIST table
#--------------------------------------------------------------------------
SHOW CREATE TABLE INFORMATION_SCHEMA.PROCESSLIST;


# Ensure that the values follow the changing default database and statement
#--------------------------------------------------------------------------
# - We have now exact one connection. -> One record
SELECT COUNT(*) FROM INFORMATION_SCHEMA.PROCESSLIST;
# - Other expected values
#   - USER = 'root'
#   - HOST = 'localhost'
#   - DB = 'test'
#   - Command = 'Query'
#   - TIME = 0, I hope the testing machines are all time fast enough
#   - State IS NULL
#   - INFO must contain the corresponding SHOW/SELECT PROCESSLIST
USE test;
--replace_column 1 <ID>
SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST;
--replace_column 1 <ID>
SHOW FULL PROCESSLIST;
#
# Expect to see now DB = 'information_schema'
USE information_schema;
--replace_column 1 <ID> 6 <TIME>
SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST;
--replace_column 1 <ID> 6 <TIME>
SHOW FULL PROCESSLIST;
#
# Expect to see now INFO = 'SELECT INFO FROM INFORMATION_SCHEMA.PROCESSLIST;'
SELECT INFO FROM INFORMATION_SCHEMA.PROCESSLIST;


# Ensure that the values for an additional connection are correct
#--------------------------------------------------------------------------
SELECT ID INTO @my_proclist_id FROM INFORMATION_SCHEMA.PROCESSLIST;
--echo
--echo ----- establish connection ddicttestuser1 (user = ddicttestuser1) -----
connect (ddicttestuser1,localhost,ddicttestuser1,ddictpass,information_schema);
#
--echo
--echo ----- switch to connection default (user = root) -----
connection default;
# - We have now a second connection.
#   First working phase for this connection is "Connect".
#   This is a very short phase and the likelihood to meet it is
#   - nearly zero on average boxes with low parallel load
#   - around some percent on weak or overloaded boxes
#     (Bug#32153 Status output differs - scheduling ?)
#   Therefore we poll till we reach the long lasting phase with:
#   - USER = ddicttestuser1
#   - HOST = 'localhost'
#   - DB = 'information_schema'
#   - Command = 'Sleep'
#   - TIME >= 0  Overloaded boxes can cause that we do not hit TIME = 0.
#   - State IS NULL
#   - INFO must be empty
#
let $wait_condition= SELECT id,user,host,db,command,@time:=time,state,info FROM INFORMATION_SCHEMA.PROCESSLIST
        WHERE COMMAND = 'Sleep' AND TIME > 0;
--source include/wait_condition.inc
#
# Expect to hit TIME > 1.
SELECT @time > 0;
#
--echo # Sleep some time
# The value of TIME must increase and reach 2 after some sleeps.
let $wait_timeout= 4;
let $wait_condition= SELECT id,user,host,db,command,@time2:=time,state,info FROM INFORMATION_SCHEMA.PROCESSLIST
        WHERE TIME > @time;
--source include/wait_condition.inc
# 
# Expect to hit TIME > @time
SELECT @time < @time2;
#
#
# The second connection must have an ID = my ID + 1;
SELECT ID = @my_proclist_id + 1 FROM INFORMATION_SCHEMA.PROCESSLIST
WHERE USER = 'ddicttestuser1';


# Ensure that the user ddicttestuser1 sees only connections with his username
# because he has not the PROCESS privilege.
#----------------------------------------------------------------------------
--echo
--echo ----- switch to connection ddicttestuser1 (user = ddicttestuser1) -----
connection ddicttestuser1;
--replace_column 1 <ID> 6 <TIME>
SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST;
--replace_column 1 <ID> 6 <TIME>
SHOW FULL PROCESSLIST;


# Ensure that the user ddicttestuser1 sees all connections with his username.
#----------------------------------------------------------------------------
--echo
--echo ----- establish connection con2 (user = ddicttestuser1) ------
connect (con2,localhost,ddicttestuser1,ddictpass,information_schema);
#
# If the testing box is under heavy load we might see connection ddicttestuser1
# within the short phase INFO = 'SHOW FULL PROCESSLIST' and STATE = 'Writing to net'.
let $wait_condition= SELECT COUNT(*) FROM INFORMATION_SCHEMA.PROCESSLIST
        WHERE COMMAND = 'Sleep';
--source include/wait_condition.inc
--replace_column 1 <ID> 6 <TIME>
SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST;
--replace_column 1 <ID> 6 <TIME>
SHOW FULL PROCESSLIST;
#
--echo
--echo ----- switch to connection default (user = root) -----
connection default;
--echo ----- close connection con2 -----
disconnect con2;


# Ensure we see correct values if a connection is during work
#----------------------------------------------------------------------------
--echo
--echo ----- switch to connection ddicttestuser1 (user = ddicttestuser1) -----
connection ddicttestuser1;
# "Organise" a long running command to be observed by the root user
--echo
--echo
--echo # Send a long enough running statement to the server, but do not
--echo # wait till the result comes back. We will pull this later.
send SELECT sleep(2.5),'Command time';
#
--echo
--echo ----- switch to connection default (user = root) -----
connection default;
# Sleep a bit so that we can be nearly sure that we see the SELECT of ddicttestuser1.
# Expect to see within the processlist the other connection just during statement
# execution.
#   - USER = ddicttestuser1
#   - HOST = 'localhost'
#   - DB = 'information_schema'
#   - Command = 'Query'(run without --ps-protocol)/'Execute' (run --ps-protocol)
#   - TIME = 1, Attention: check with TIME = 0 is not stable
#   - State IS NULL
#   - INFO = "SELECT sleep(2.5),'Command time'"
--echo # Sleep some time
# The command must be after some time in work by the server.
# So poll till INFO is no more NULL and TIME > 0.
let $wait_condition= SELECT id,user,host,db,command,@time:=time,state,info FROM INFORMATION_SCHEMA.PROCESSLIST
        WHERE INFO IS NOT NULL AND TIME > 0;
--source include/wait_condition.inc
#
# Expect to see TIME > 0;
SELECT @time > 0;
#
--echo # Sleep some time
# The value of TIME must increase and reach 2 after some sleeps.
let $wait_timeout= 2;
let $wait_condition= SELECT id,user,host,db,command,@time2:=time,state,info FROM INFORMATION_SCHEMA.PROCESSLIST
        WHERE TIME > @time;
--source include/wait_condition.inc
#
# Expect to see @time < @time2
SELECT @time < @time2;
#
--echo
--echo ----- switch to connection ddicttestuser1 (user = ddicttestuser1) -----
connection ddicttestuser1;
--echo # Pull("reap") the result set from the statement executed with "send".
reap;


# Ensure that SHOW/SELECT processlist can handle extreme long commands
#----------------------------------------------------------------------------
--echo
--echo
--echo # Send a long (21 KB code and runtime = 2 seconds) statement to the server,
--echo # but do not wait till the result comes back. We will pull this later.
# Please do not change the next statement.
# The annoying long line is intended. Many short lines would be a different test.
send SELECT sleep(2),'BEGIN this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very long statement.this is the representative of a very 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#
--echo
--echo ----- switch to connection default (user = root) -----
connection default;
--echo # Sleep some time
# The command must be after some time in work by the server.
# There is a short phase with STATE IS NULL followed by a longer phase
# with STATE = 'executing'.
# So poll till INFO is no more NULL AND STATE = 'executing'.
let $wait_timeout= 9;
let $wait_condition= SELECT COUNT(*) FROM INFORMATION_SCHEMA.PROCESSLIST
       WHERE INFO IS NOT NULL AND STATE = 'executing';
--source include/wait_condition.inc
#
# Expect to see that SELECT/SHOW PROCESSLIST can handle my statement monster.
--replace_column 1 <ID> 5 <COMMAND> 6 <TIME> 7 <STATE>
SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST;
--replace_column 1 <ID> 5 <COMMAND> 6 <TIME> 7 <STATE>
SHOW FULL PROCESSLIST;
# SHOW PROCESSLIST truncates INFO after 100 characters.
--replace_column 1 <ID> 5 <COMMAND> 6 <TIME> 7 <STATE>
SHOW PROCESSLIST;
--echo
--echo ----- switch to connection ddicttestuser1 (user = ddicttestuser1) -----
connection ddicttestuser1;
--echo # Pull("reap") the result set from the monster statement executed with "send".
reap;

# Ensure that we see that a connection "hangs" when colliding with a
# WRITE TABLE LOCK
#----------------------------------------------------------------------------
--echo
--echo ----- switch to connection default (user = root) -----
connection default;
LOCK TABLE test.t1 WRITE;
#
--echo
--echo ----- switch to connection ddicttestuser1 (user = ddicttestuser1) -----
connection ddicttestuser1;
--echo # Send a statement to the server, but do not wait till the result
--echo # comes back. We will pull this later.
send SELECT COUNT(*) FROM test.t1;
#
--echo
--echo ----- switch to connection default (user = root) -----
connection default;
--echo # Sleep some time
# The command must be after some time in work by the server.
# So poll till INFO is no more NULL.
let $wait_timeout= 4;
let $wait_condition= SELECT COUNT(*) FROM INFORMATION_SCHEMA.PROCESSLIST
        WHERE INFO IS NOT NULL AND STATE = 'Locked';
--source include/wait_condition.inc
#
# Expect to see the state 'Locked' for the second connection because the SELECT
# collides with the WRITE TABLE LOCK.
--replace_column 1 <ID> 6 <TIME>
SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST;
--replace_column 1 <ID> 6 <TIME>
SHOW FULL PROCESSLIST;
UNLOCK TABLES;
#
--echo
--echo ----- switch to connection ddicttestuser1 (user = ddicttestuser1) -----
connection ddicttestuser1;
--echo # Pull("reap") the result set from the statement executed with "send".
reap;


# Cleanup
--echo
--echo ----- switch to connection default (user = root) -----
connection default;
--echo
--echo ----- close connection ddicttestuser1 -----
disconnect ddicttestuser1;
DROP USER ddicttestuser1@'localhost';
DROP TABLE test.t1;
