dawidwys commented on a change in pull request #10763: [FLINK-14200][table] Fix
NPE for Temporal Table Function Join when left side is a query instead of a
source
URL: https://github.com/apache/flink/pull/10763#discussion_r363214928
##########
File path:
flink-table/flink-table-planner-blink/src/test/scala/org/apache/flink/table/planner/runtime/stream/sql/TemporalJoinITCase.scala
##########
@@ -158,11 +160,87 @@ class TemporalJoinITCase(state: StateBackendMode)
assertEquals(expectedOutput, sink.getAppendResults.toSet)
}
+
+ @Test
+ def testNestedTemporalJoin(): Unit = {
+ val env = StreamExecutionEnvironment.getExecutionEnvironment
+ val tEnv = StreamTableEnvironment.create(env, TableTestUtil.STREAM_SETTING)
+ env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime)
+
+ val sqlQuery =
+ """
+ |SELECT
+ | o.amount, r.rate, p.price
Review comment:
If we are using a real world example, could we make it more useful?
How about:
```
Orders
|- orderId: String
|- productId: String
|- amount: Long
|- timestamp: Timestamp
Rates
|- currency: String
|- rate: Double
|- timestamp: Timestamp
Prices
|- productId: String
|- currency: String
|- price: Double
|- timestamp: Timestamp
Query:
SELECT
o.orderId,
(o.amount * p.price * r.rate) as total_price
FROM
Orders AS o,
LATERAL TABLE (Rates(o.rowtime)) AS r,
LATERAL TABLE (Prices(o.rowtime)) AS p
WHERE
o.productId = p.productId AND
r.currency = p.currency
```
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