sunxiaoguang commented on code in PR #49452:
URL: https://github.com/apache/spark/pull/49452#discussion_r1916230916
##########
sql/core/src/main/scala/org/apache/spark/sql/jdbc/OracleDialect.scala:
##########
@@ -61,6 +61,34 @@ private case class OracleDialect() extends JdbcDialect with
SQLConfHelper with N
} else {
super.visitAggregateFunction(funcName, isDistinct, inputs)
}
+
+ private def compareBlob(lhs: Expression, operator: String, rhs:
Expression): String = {
+ val l = inputToSQL(lhs)
+ val r = inputToSQL(rhs)
+ val op = if (operator == "<=>") "=" else operator
+ val compare = s"DBMS_LOB.COMPARE($l, $r) $op 0"
+ if (operator == "<=>") {
+ s"(($l IS NOT NULL AND $r IS NOT NULL AND $compare) OR ($l IS NULL AND
$r IS NULL))"
Review Comment:
Yes, it's dirty. Fortunately, we only found Oracle requires a special
function to compare blob values.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
