fix: GROUP_CONCAT returns incorrect result for JSON type (#23462) #23573
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…n#23462) The GROUP_CONCAT function was using concatVar for JSON type which directly appends raw bytejson binary format instead of readable JSON string. Added dedicated concatJson function to properly decode bytejson and convert to JSON string output.
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ouyuanning
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Jan 22, 2026
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Merge Queue Status✅ The pull request has been merged at 94b79ec This pull request spent 5 seconds in the queue, with no time running CI. Required conditions to merge
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What type of PR is this?
Which issue(s) this PR fixes:
issue #23462
What this PR does / why we need it:
The GROUP_CONCAT function was using concatVar for JSON type which directly appends raw bytejson binary format instead of readable JSON string. Added dedicated concatJson function to properly decode bytejson and convert to JSON string output.