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MDEV-17001 JSON_MERGE returns nullwhen merging empty array.

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Don't add the comma if nothing appended to the array.
This commit is contained in:
Alexey Botchkov
2018-09-13 13:42:09 +04:00
parent 2b46dca5d7
commit f54485eadb
4 changed files with 24 additions and 20 deletions
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6
mysql-test/r/func_json.result
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@ -804,3 +804,9 @@ SELECT JSON_SEARCH(@`json`, 'one', @`value`);
JSON_SEARCH(@`json`, 'one', @`value`)
"$[2].C"
SET @`json` := NULL, @`value` := NULL;
#
# MDEV-17001 JSON_MERGE returns nullwhen merging empty array.
#
SELECT JSON_MERGE('[1]', '[]');
JSON_MERGE('[1]', '[]')
[1]