gatorsmile commented on a change in pull request #21479: [SPARK-23903][SQL] Add
support for date extract
URL: https://github.com/apache/spark/pull/21479#discussion_r409900080
##########
File path:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4
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@@ -592,6 +592,7 @@ primaryExpression
| identifier
#columnReference
| base=primaryExpression '.' fieldName=identifier
#dereference
| '(' expression ')'
#parenthesizedExpression
+ | EXTRACT '(' field=identifier FROM source=valueExpression ')'
#extract
Review comment:
@HyukjinKwon @maropu @wangyum @huaxingao Just realized EXTRACT is not
included in https://spark.apache.org/docs/latest/api/sql/index.html Could we
fix it in the upcoming built-in function doc page updates?
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