MDEV-32331: json path crashes without a character set - #5433
Merged
Conversation
grooverdan
added
the
MariaDB Foundation
grooverdan
force-pushed
the
MDEV-32331
branch
2 times, most recently
from
July 22, 2026 05:37
092f549 to
6a6ae40
Compare
mariadb-RuchaDeodhar
approved these changes
Jul 31, 2026
Across a range of JSON functions taking a path argument there are SQL expressions that dont' have a character set. If these expressions don't have a character set fall back to the character set of the argument of the json function that represent the document being operated on. If this doesn't have a character set fall back to my_charset_utf8mb4_bin. This covers the 11.4 JSON_KEY_VALUE function also as it reuses the Json_path_extractor::extract method. Add nonnull and warn_unused_result to the json path functions to facilitate compiler and UBSAN catching of the problem early. As null values of s_p are incompatible with report_path_error, jump directly to a null return which is consistent with the defination of the JSON sql funciton.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Across a range of JSON functions taking a path argument there are SQL expressions that dont' have a character set. If these expressions don't have a character set fall back to the character set of the argument of the json function that represent the document being operated on. If this doesn't have a character set fall back to my_charset_utf8mb4_bin.
This covers the 11.4 JSON_KEY_VALUE function also as it reuses the Json_path_extractor::extract method.
Add nonnull and warn_unused_result to the json path functions to facilitate compiler and UBSAN catching of the problem early.
As null values of s_p are incompatible with report_path_error, jump directly to a null return which is consistent with the defination of the JSON sql funciton.