dzcxzl created SPARK-23603:
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Summary: When the length of the json is in a range,get_json_object
will result in missing tail data
Key: SPARK-23603
URL: https://issues.apache.org/jira/browse/SPARK-23603
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.3.0, 2.2.0, 2.0.0
Reporter: dzcxzl
Jackson(>=2.7.7) fixes the possibility of missing tail data when the length of
the value is in a range
[https://github.com/FasterXML/jackson/wiki/Jackson-Release-2.7.7]
[https://github.com/FasterXML/jackson-core/issues/307]
spark-shell:
{code:java}
val value = "x" * 3000
val json = s"""{"big": "$value"}"""
spark.sql("select length(get_json_object(\'"+json+"\','$.big'))" ).collect
res0: Array[org.apache.spark.sql.Row] = Array([2991])
{code}
correct result : 3000
There are two solutions
One is
bump jackson version to 2.7.7
The other one is
Replace writeRaw(char[] text, int offset, int len) with writeRaw(String text)
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