yaooqinn commented on code in PR #50101:
URL: https://github.com/apache/spark/pull/50101#discussion_r1974707704


##########
sql/core/src/main/scala/org/apache/spark/sql/jdbc/PostgresDialect.scala:
##########
@@ -303,12 +303,27 @@ private case class PostgresDialect()
 
   class PostgresSQLBuilder extends JDBCSQLBuilder {
     override def visitExtract(field: String, source: String): String = {
-      field match {
-        case "DAY_OF_YEAR" => s"EXTRACT(DOY FROM $source)"
-        case "YEAR_OF_WEEK" => s"EXTRACT(YEAR FROM $source)"
-        case "DAY_OF_WEEK" => s"EXTRACT(DOW FROM $source)"
-        case _ => super.visitExtract(field, source)
+      // SECOND, MINUTE, HOUR, QUARTER, YEAR, DAY are identical on postgres 
and spark
+      // MONTH        is different, postgres returns 0-11, spark returns 1-12.

Review Comment:
   Yeah, I believe they shall be identical as they all came from the work 
within the Postgres feature parity umbrella ticket.
   
   I appreciate the confirmation. 



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