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--source include/big_test.inc
--source include/have_debug.inc
# Actually this test is tailored for 4k,
# but it should pass for other sizes (8k, 16k) as well.
--source include/have_innodb_max_16k.inc
SET GLOBAL innodb_compression_level = 0;
CREATE TABLE t1 (j1 JSON) ENGINE=InnoDB ROW_FORMAT=compressed;
SHOW CREATE TABLE t1;
# Must be long enough to force external storage.
# Also the length must be so that json_doc last "page" of last stream
# is short enough to fit on fragment page.
# I've used trial end error with `--manual-debug --initialize=--innodb-page-size=4k`
# with conditional breakpoint inside z_insert_strm() for condition remain < size
# to see what is the remaining size in last iteration, and then picking a lob size
# such that the `remain` is smaller than 1991/4 which is a criterion used to decide
# if we should use a fragment page.
# This particular value (when run with --initialize=--innodb-page-size=4k) stores the
# [1]-th element of JSON array in a fragment page.
SET @long_str = REPEAT('abcdefghijklmnopqrstuvwxyz1234', 59921);
# must be long enough to force new version (as opposed to storing diff in the undo log),
# but must be short enough to not cause complete rewrite of the blob
SET @medium_str_1 = REPEAT('a', 200);
SET @medium_str_2 = REPEAT('b', 200);
SET @json_doc = CONCAT('["', @long_str, '","', @medium_str_1 ,'" ]');
BEGIN;
INSERT INTO t1 (j1) VALUES (@json_doc);
SELECT JSON_EXTRACT(j1, '$[1]') FROM t1;
# We need to generate enough fragments so that the index of fragments
# overflows first page and needs to allocate z_frag_node_page_t page.
--let i=0
while($i<50){
UPDATE t1 SET j1 = JSON_REPLACE(j1, '$[1]', @medium_str_2);
SELECT JSON_EXTRACT(j1, '$[1]') FROM t1;
UPDATE t1 SET j1 = JSON_REPLACE(j1, '$[1]', @medium_str_1);
SELECT JSON_EXTRACT(j1, '$[1]') FROM t1;
--inc $i
}
ROLLBACK;
DROP TABLE t1;
SET GLOBAL innodb_compression_level = default;
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