Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/16918#discussion_r101160486
--- Diff: docs/structured-streaming-kafka-integration.md ---
@@ -187,50 +306,68 @@ The following options must be set for the Kafka
source.
The following configurations are optional:
<table class="table">
-<tr><th>Option</th><th>value</th><th>default</th><th>meaning</th></tr>
+<tr><th>Option</th><th>value</th><th>default</th><th>query
type</th><th>meaning</th></tr>
<tr>
<td>startingOffsets</td>
- <td>earliest, latest, or json string
- {"topicA":{"0":23,"1":-1},"topicB":{"0":-2}}
+ <td>"earliest", "latest" (streaming only), or json string
+ """ {"topicA":{"0":23,"1":-1},"topicB":{"0":-2}} """
</td>
- <td>latest</td>
+ <td>"latest" for streaming, "earliest" for batch</td>
+ <td>streaming and batch</td>
<td>The start point when a query is started, either "earliest" which is
from the earliest offsets,
"latest" which is just from the latest offsets, or a json string
specifying a starting offset for
each TopicPartition. In the json, -2 as an offset can be used to refer
to earliest, -1 to latest.
- Note: This only applies when a new Streaming query is started, and that
resuming will always pick
- up from where the query left off. Newly discovered partitions during a
query will start at
+ Note: For Batch queries, latest (either implicitly or by using -1 in
json) is not allowed.
--- End diff --
nit: why is B and S in Batch queries and Streaming queries randomly caps? I
dont think "batch query" is a proper name of any API, and neither is "streaming
query", unless you are referring the specific class "StreamingQuery".
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