wankunde commented on pull request #27030:
URL: https://github.com/apache/spark/pull/27030#issuecomment-622933702
@ayudovin @dongjoon-hyun @HyukjinKwon
Can you emit `LoadPartitionEvent` and `LoadDynamicPartitionsEvent` ?
Now the user does not know which partitions are loaded, if
`LoadDynamicPartitionsEvent` events are emitted to the listener, the user will
know the changed partitions and add a custom callback function.
```
def calculateDynamicPartitions(
loadPath: Path,
partitionSpec: TablePartitionSpec,
numDP: Int): Array[TablePartitionSpec] = {
assert(numDP > 0)
try {
val fs = loadPath.getFileSystem(new Configuration())
fs.listStatus(loadPath).flatMap { fileStatus =>
val dirName = fileStatus.getPath.getName
if (dirName.contains("=")) {
val Array(partitionColumn, partitionValue) = dirName.split("=")
val newPartitionSpec = partitionSpec + (partitionColumn ->
partitionValue)
if (numDP == 1) {
Array[TablePartitionSpec](newPartitionSpec)
} else {
calculateDynamicPartitions(fileStatus.getPath, newPartitionSpec,
numDP - 1)
}
} else {
Array[TablePartitionSpec]()
}
}
} catch {
case ex: Exception => Array[TablePartitionSpec]()
}
} }
```
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