jackye1995 commented on code in PR #6617:
URL: https://github.com/apache/iceberg/pull/6617#discussion_r1082118486
##########
spark/v3.3/spark-extensions/src/main/antlr/org.apache.spark.sql.catalyst.parser.extensions/IcebergSqlExtensions.g4:
##########
@@ -168,34 +175,77 @@ fieldList
;
nonReserved
- : ADD | ALTER | AS | ASC | BY | CALL | DESC | DROP | FIELD | FIRST | LAST
| NULLS | ORDERED | PARTITION | TABLE | WRITE
- | DISTRIBUTED | LOCALLY | UNORDERED | REPLACE | WITH | IDENTIFIER_KW |
FIELDS | SET
+ : ADD | ALTER | AS | ASC | BRANCH | BY | CALL | CREATE | DAYS | DESC |
DROP | FIELD | FIRST | HOURS | LAST | NULLS | OF | ORDERED | PARTITION | TABLE
| WRITE
+ | DISTRIBUTED | LOCALLY | MINUTES | MONTHS | UNORDERED | REPLACE | RETAIN
| VERSION | WITH | IDENTIFIER_KW | FIELDS | SET | SNAPSHOT | SNAPSHOTS
| TRUE | FALSE
| MAP
;
+snapshotId
+ : number
+ ;
+
+numSnapshots
+ : number
+ ;
+
+snapshotRetain
+ : number
+ ;
+
+snapshotRefRetain
+ : number
+ ;
+
+snapshotRefRetainTimeUnit
+ : timeUnit
+ ;
+
+snapshotRetainTimeUnit
+ : timeUnit
+ ;
+
+timeUnit
+ : MONTHS
+ | DAYS
+ | HOURS
+ | MINUTES
Review Comment:
sure, I am fine with minute level. We can always add more if needed.
##########
spark/v3.3/spark-extensions/src/main/scala/org/apache/spark/sql/catalyst/parser/extensions/IcebergSqlExtensionsAstBuilder.scala:
##########
@@ -267,6 +286,12 @@ class IcebergSqlExtensionsAstBuilder(delegate:
ParserInterface) extends IcebergS
private def typedVisit[T](ctx: ParseTree): T = {
ctx.accept(this).asInstanceOf[T]
}
+
+ private def timeRetain(unit: String, duration: Long): Long =
unit.toUpperCase(Locale.ENGLISH) match {
+ case "MONTHS" => 30 * TimeUnit.DAYS.toMillis(duration)
Review Comment:
hmm, good point, there is not exactly always 30 days in a month. That's
probably why it is not supported by `TimeUnit`. So I would say in that case
let's remove MONTHS from the time unit in parser and just support DAYS, HOURS
and MINUTES.
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