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https://issues.apache.org/jira/browse/NIFI-981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15267940#comment-15267940
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ASF GitHub Bot commented on NIFI-981:
-------------------------------------
Github user bbende commented on a diff in the pull request:
https://github.com/apache/nifi/pull/384#discussion_r61832445
--- Diff:
nifi-nar-bundles/nifi-hive-bundle/nifi-hive-processors/src/main/java/org/apache/nifi/processors/hive/SelectHiveQL.java
---
@@ -52,15 +54,27 @@
@EventDriven
@InputRequirement(Requirement.INPUT_ALLOWED)
@Tags({"hive", "sql", "select", "jdbc", "query", "database"})
-@CapabilityDescription("Execute provided HiveQL SELECT query against a
Hive database connection. Query result will be converted to Avro format."
+@CapabilityDescription("Execute provided HiveQL SELECT query against a
Hive database connection. Query result will be converted to Avro or CSV format."
+ " Streaming is used so arbitrarily large result sets are
supported. This processor can be scheduled to run on "
+ "a timer, or cron expression, using the standard scheduling
methods, or it can be triggered by an incoming FlowFile. "
+ "If it is triggered by an incoming FlowFile, then attributes of
that FlowFile will be available when evaluating the "
+ "select query. FlowFile attribute 'executehiveql.row.count'
indicates how many rows were selected.")
-public class ExecuteHiveQL extends AbstractHiveQLProcessor {
+@WritesAttributes({
+ @WritesAttribute(attribute = "mime.type", description = "Sets the
MIME type for the outgoing flowfile to application/avro-binary for Avro or
text/csv for CSV."),
+ @WritesAttribute(attribute = "filename", description = "Adds .avro
or .csv to the filename attribute depending on which output format is
selected."),
+ @WritesAttribute(attribute = "executehiveql.row.count",
description = "Indicates how many rows were selected/returned by the query.")
--- End diff --
Nit-picking here, but given the rename of the processor, do we want this to
be selecthiveql.row.count?
> Add support for Hive JDBC / ExecuteSQL
> --------------------------------------
>
> Key: NIFI-981
> URL: https://issues.apache.org/jira/browse/NIFI-981
> Project: Apache NiFi
> Issue Type: New Feature
> Components: Extensions
> Reporter: Joseph Witt
> Assignee: Matt Burgess
>
> In this mailing list thread from September 2015 "NIFI DBCP connection pool
> not working for hive" the main thrust of the converstation is to provide
> proper support for delivering data to hive. Hive's jdbc driver appears to
> have dependencies on Hadoop libraries. We need to be careful/thoughtful
> about how to best support this so that different versions of Hadoop distros
> can be supported (potentially in parallel on the same flow).
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