HyukjinKwon commented on code in PR #37431:
URL: https://github.com/apache/spark/pull/37431#discussion_r949741781
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sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala:
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@@ -2924,6 +2924,18 @@ object SQLConf {
.stringConf
.createWithDefault("csv,json,orc,parquet")
+ val JSON_GENERATOR_WRITE_NULL_IF_WITH_DEFAULT_VALUE =
+ buildConf("spark.sql.jsonGenerator.writeNullIfWithDefaultValue")
+ .internal()
+ .doc("When true, when writing NULL values to columns of JSON tables with
explicit DEFAULT " +
+ "values using INSERT, UPDATE, or MERGE commands, never skip writing
the NULL values to " +
+ "storage, overriding spark.sql.jsonGenerator.ignoreNullFields or the
ignoreNullFields " +
Review Comment:
nit but we could use `JSON_GENERATOR_IGNORE_NULL_FIELDS.key` instead of
`spark.sql.jsonGenerator.ignoreNullFields`
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