Github user twalthr commented on a diff in the pull request:

    https://github.com/apache/flink/pull/4373#discussion_r129239292
  
    --- Diff: 
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/time.scala
 ---
    @@ -355,26 +355,36 @@ case class TemporalOverlaps(
           rightT: RexNode,
           relBuilder: FlinkRelBuilder)
         : RexNode = {
    -    // leftT = leftP + leftT if leftT is an interval
    -    val convLeftT = if (isTimeInterval(leftTemporal.resultType)) {
    -        relBuilder.call(SqlStdOperatorTable.DATETIME_PLUS, leftP, leftT)
    -      } else {
    -        leftT
    -      }
    -    // rightT = rightP + rightT if rightT is an interval
    -    val convRightT = if (isTimeInterval(rightTemporal.resultType)) {
    -        relBuilder.call(SqlStdOperatorTable.DATETIME_PLUS, rightP, rightT)
    -      } else {
    -        rightT
    -      }
    -    // leftT >= rightP
    -    val leftPred = 
relBuilder.call(SqlStdOperatorTable.GREATER_THAN_OR_EQUAL, convLeftT, rightP)
    -    // rightT >= leftP
    -    val rightPred = 
relBuilder.call(SqlStdOperatorTable.GREATER_THAN_OR_EQUAL, convRightT, leftP)
    +    val convLeftT = convertOverlapsEnd(relBuilder, leftP, leftT, 
leftTemporal.resultType)
    --- End diff --
    
    Can you open a separate PR for this? It should be part of FLINK-7159. I 
think we can get this in before this PR.


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