executor: add conversion to opaque value for json_objectagg and json_arrayagg

[YangKeao]

Signed-off-by: YangKeao yangkeao@chunibyo.icu

What problem does this PR solve?

Issue Number: close #25053

Problem Summary:

The behavior of json_objectagg and json_arrayagg are different with MySQL, about the binary opaque value.

What is changed and how it works?

Add a condition for the binary values, and convert them to the JSON Opaque. It needs to notice that:

1. The value cannot be directly casted into JSON. The cast json behavior will try to cast a string to json, which is not expected.
2. The key could contain control character (e.g. \t, \n). The MySQL also has the same behavior, though JSON path cannot contain control character.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

drop table if exists test;
create table test (col_2 int, col_3 varbinary(163));
insert into test values (1,'o');
select json_objectagg( col_2, col_3 ) from test;

drop table if exists test;
create table test (col_2 int, col_3 binary(163));
insert into test values (1,'o');
select json_objectagg( col_2, col_3 ) from test;

drop table if exists test;
create table test (col_2 int, col_3 blob);
insert into test values (1,'o');
select json_objectagg( col_2, col_3 ) from test;

select json_objectagg( 'a', b'1010111' ) from test;

Release note

Fix the issue that the json_objectagg and json_arrayagg is not compatible with MySQL on binary value.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• xhebox
• xiongjiwei

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[ti-chi-bot]

Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/f93c3fa75903e7fed39e0e757b95487ccfdb78b8

[YangKeao]

PTAL @xiongjiwei

[xiongjiwei]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 9f1ed95

[sre-bot]

TiDB MergeCI notify

✅ Well Done! New fixed [2] after this pr merged.

CI Name	Result	Duration	Compare with Parent commit
idc-jenkins-ci-tidb/common-test	🔴 failed 1, success 10, total 11	16 min	Existing failure
idc-jenkins-ci-tidb/integration-common-test	✅ all 17 tests passed	20 min	Fixed
idc-jenkins-ci-tidb/integration-ddl-test	✅ all 6 tests passed	6 min 18 sec	Fixed
idc-jenkins-ci/integration-cdc-test	🟢 all 36 tests passed	31 min	Existing passed
idc-jenkins-ci-tidb/tics-test	🟢 all 1 tests passed	9 min 18 sec	Existing passed
idc-jenkins-ci-tidb/sqllogic-test-2	🟢 all 28 tests passed	7 min 18 sec	Existing passed
idc-jenkins-ci-tidb/sqllogic-test-1	🟢 all 26 tests passed	6 min 48 sec	Existing passed
idc-jenkins-ci-tidb/integration-compatibility-test	🟢 all 1 tests passed	4 min 40 sec	Existing passed
idc-jenkins-ci-tidb/mybatis-test	🟢 all 1 tests passed	3 min 36 sec	Existing passed
idc-jenkins-ci-tidb/plugin-test	🟢 build success, plugin test success	4min	Existing passed