#
# This test performs zero-sum queries, that is, queries after which the average value of all integers in the table remains the same.
# Some queries move values within a single row, others between rows and some insert new values or delete existing ones.#
# The values in the first 10 rows are updated so that values from one row may move into another row. This makes those rows unsuitable for random
# insertions and deletions.
#
# Rows beyond the 10th are just inserted and delted randomly because each row in that part of the table is self-contained
#

query_init:
	SET AUTOCOMMIT=OFF ; START TRANSACTION ;

query:
	START TRANSACTION ; body ; commit_rollback ;

body:
	update_between |
	update_in ;

commit_rollback:
	ROLLBACK
;

update_between:
	SET @var = half_digit ; UPDATE _table SET update_both WHERE `pk` >= @var AND `pk` <= @var + 1 |
	SET @var = half_digit ; UPDATE _table SET update_both WHERE `pk` BETWEEN @var AND @var + 1 ;
	
update_in:
	UPDATE _table SET update_one_half  + IF(`pk` % 2 = 1 , 30, -30) WHERE `pk` IN ( even_odd ) ;

update_both:
	`int_key` = `int_key` - 20, `int` = `int` + 20 |
	`int` = `int` + 30, `int_key` = `int_key` - 30 ;

update_one_half:
	`int_key` = `int_key` |
	`int` = `int` ;

value:
	_digit;

half_digit:
	1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 ;

even_odd:
	odd , even | even , odd ;

odd:
	1 | 3 | 5 | 7 | 9 ;

even:
	2 | 4 | 6 | 8 ;

small:
	1 | 2 | 3 | 4 ;

big:
	5 | 6 | 7 | 8 | 9 ;

_digit:
	1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 ;