From 00cee329bde326bde8ef2071b1ffc1970c5c328c Mon Sep 17 00:00:00 2001 From: Victoria Lim Date: Wed, 25 Jan 2023 12:50:19 -0800 Subject: [PATCH] pitfall when using combining input source (#13639) --- docs/ingestion/native-batch-input-source.md | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/docs/ingestion/native-batch-input-source.md b/docs/ingestion/native-batch-input-source.md index e2c7bd038b1..624f8fab194 100644 --- a/docs/ingestion/native-batch-input-source.md +++ b/docs/ingestion/native-batch-input-source.md @@ -756,6 +756,8 @@ Use the Combining input source only if all the delegates are splittable and can Similar to other input sources, the Combining input source supports a single `inputFormat`. Delegate input sources that require an `inputFormat` must have the same format for input data. +If you include the [Druid input source](#druid-input-source), the timestamp column is stored in the `__time` field. +To correctly combine the data from the Druid input source with another source, ensure that other delegate input sources also store the timestamp column in `__time`. |Property|Description|Required| |--------|-----------|---------| @@ -797,4 +799,4 @@ Set this value in `maxNumConcurrentSubTasks` in `tuningConfig` based on the seco - `range` or `single_dim` partitioning: greater than or equal to 1 - `hashed` or `dynamic` partitioning: greater than or equal to 2 -For more information on the `maxNumConcurrentSubTasks` field, see [Implementation considerations](native-batch.md#implementation-considerations). \ No newline at end of file +For more information on the `maxNumConcurrentSubTasks` field, see [Implementation considerations](native-batch.md#implementation-considerations).