MINI MINI MANI MO

# The include statement below is a temp one for tests that are yet to
#be ported to run with InnoDB,
#but needs to be kept for tests that would need MyISAM in future.
--source include/force_myisam_default.inc

#
# Test of pushed joins, aka SPJ, or AQL.
# (Test with defaults + 'batched_key_access=on')
#
# NOTE: BKA will turn of lots of pushed join, we 
#       are unsure if this is the best strategy, or
#       if its better/possible to sacrify the BKA
#

--source include/have_ndb.inc
if (!`select locate('batched_key_access', @@global.optimizer_switch) > 0`)
{
  skip Need batched_key_access;
}

set @@global.optimizer_switch='batched_key_access=on';

--source ndb_join_pushdown.inc 

################################
# BKA specific test cases / bugs
#

#Bug#32774281  MULTI-RANGE LOOKUP FAILS,
#              ERROR 4316 'KEY ATTRIBUTES ARE NOT ALLOWED TO BE NULL'
#
# The MRR flag HA_MRR_NO_NULL_ENDPOINTS was specified even if
# such a guarantee could not be made: If the join condition
# contained a IS NULL predicate, or the '<=>' 'NULL-safe' equal
# operator was used in the predicate, NULL values keys _are_
# generated during execution.
#
# Note1: The HA_MRR_NO_NULL_ENDPOINTS flag is only used by the
#         ha_ndcluster handler.
#
# Note2: HA_MRR_NO_NULL_ENDPOINTS is only checked for a
#        'UNIQUE KEY   ... USING HASH'

CREATE TABLE f (
  col_int_key int DEFAULT NULL
) ENGINE=ndbcluster;

CREATE TABLE p (
  col_int int DEFAULT NULL,
  col_int_unique int DEFAULT NULL,
  UNIQUE KEY ix1 (col_int,col_int_unique) USING HASH
) ENGINE=ndbcluster;

insert into f values (1),(NULL);
insert into p values (NULL,1);

# A IS NULL predicate will generate MRR NULL value keys
# -> A BKA access should not be generated
let $query=
SELECT * FROM f AS table2
  STRAIGHT_JOIN p AS table4 ON table4.col_int IS NULL
                           AND table4.col_int_unique = table2.col_int_key;

eval explain $query;
--sorted_result
eval $query;

# Using a literal instead will -> BKA access
let $query=
SELECT * FROM f AS table2
  STRAIGHT_JOIN p AS table4 ON table4.col_int = 1
                           AND table4.col_int_unique = table2.col_int_key;

eval explain $query;
--sorted_result
eval $query;


# Similar test cases with '<=>' vs '='
# Only '=' guarantee HA_MRR_NO_NULL_ENDPOINTS
let $query=
SELECT * FROM f AS table2
  STRAIGHT_JOIN p AS table4 ON table4.col_int <=> table2.col_int_key
                           AND table4.col_int_unique = table2.col_int_key;
eval explain $query;
--sorted_result
eval $query;

let $query=
SELECT * FROM f AS table2
  STRAIGHT_JOIN p AS table4 ON table4.col_int = table2.col_int_key
                           AND table4.col_int_unique <=> table2.col_int_key;
eval explain $query;
--sorted_result
eval $query;

let $query=
SELECT * FROM f AS table2
  STRAIGHT_JOIN p AS table4 ON table4.col_int = table2.col_int_key
                           AND table4.col_int_unique = table2.col_int_key;
eval explain $query;
--sorted_result
eval $query;

DROP TABLE f,p;


set @@global.optimizer_switch=default;