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MDEV-26724 Endless loop in json_escape_to_string upon ... empty string

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.. part#2: correctly pass the charset to JSON [un]escape functions
This commit is contained in:
Sergei Petrunia
2021-10-01 20:50:43 +03:00
parent 43a8d9f156
commit 5d66eeb3a1
3 changed files with 50 additions and 7 deletions
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28
mysql-test/main/statistics_json.result
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@ -7898,6 +7898,34 @@ a
b
drop table t1;
create table t1 (a char(1)) character set latin1;
insert into t1 values (0xD1);
select hex(a) from t1;
hex(a)
D1
set histogram_type='json_hb';
analyze table t1 persistent for all;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
select decode_histogram(hist_type, histogram)
from mysql.column_stats
where db_name=database() and table_name='t1';
decode_histogram(hist_type, histogram)
{
"histogram_hb_v2": [
{
"start": "Ñ",
"end": "Ñ",
"size": 1,
"ndv": 1
}
]
}
select * from t1;
a
Ñ
drop table t1;
#
# ASAN use-after-poison my_strnxfrm_simple_internal / Histogram_json_hb::range_selectivity ...
# (Just the testcase)