Github user mattyb149 commented on a diff in the pull request:
https://github.com/apache/nifi/pull/1652#discussion_r110397744
--- Diff:
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/QueryFlowFile.java
---
@@ -0,0 +1,550 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.nifi.processors.standard;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+import java.util.Set;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.function.Supplier;
+
+import org.apache.calcite.config.CalciteConnectionProperty;
+import org.apache.calcite.config.Lex;
+import org.apache.calcite.jdbc.CalciteConnection;
+import org.apache.calcite.schema.SchemaPlus;
+import org.apache.calcite.sql.parser.SqlParser;
+import org.apache.nifi.annotation.behavior.DynamicProperty;
+import org.apache.nifi.annotation.behavior.DynamicRelationship;
+import org.apache.nifi.annotation.behavior.EventDriven;
+import org.apache.nifi.annotation.behavior.InputRequirement;
+import org.apache.nifi.annotation.behavior.InputRequirement.Requirement;
+import org.apache.nifi.annotation.behavior.SideEffectFree;
+import org.apache.nifi.annotation.behavior.SupportsBatching;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.annotation.lifecycle.OnScheduled;
+import org.apache.nifi.annotation.lifecycle.OnStopped;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.ValidationContext;
+import org.apache.nifi.components.ValidationResult;
+import org.apache.nifi.components.Validator;
+import org.apache.nifi.flowfile.FlowFile;
+import org.apache.nifi.flowfile.attributes.CoreAttributes;
+import org.apache.nifi.processor.AbstractProcessor;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.ProcessSession;
+import org.apache.nifi.processor.ProcessorInitializationContext;
+import org.apache.nifi.processor.Relationship;
+import org.apache.nifi.processor.exception.ProcessException;
+import org.apache.nifi.processor.io.OutputStreamCallback;
+import org.apache.nifi.queryflowfile.FlowFileTable;
+import org.apache.nifi.serialization.RecordSetWriter;
+import org.apache.nifi.serialization.RecordSetWriterFactory;
+import org.apache.nifi.serialization.RowRecordReaderFactory;
+import org.apache.nifi.serialization.WriteResult;
+import org.apache.nifi.serialization.record.ResultSetRecordSet;
+import org.apache.nifi.util.StopWatch;
+
+@EventDriven
+@SideEffectFree
+@SupportsBatching
+@Tags({"sql", "query", "calcite", "route", "record", "transform",
"select", "update", "modify", "etl", "filter", "record", "csv", "json", "logs",
"text", "avro", "aggregate"})
+@InputRequirement(Requirement.INPUT_REQUIRED)
+@CapabilityDescription("Evaluates one or more SQL queries against the
contents of a FlowFile. The result of the "
+ + "SQL query then becomes the content of the output FlowFile. This can
be used, for example, "
+ + "for field-specific filtering, transformation, and row-level
filtering. "
+ + "Columns can be renamed, simple calculations and aggregations
performed, etc. "
+ + "The Processor is configured with a Record Reader Controller Service
and a Record Writer service so as to allow flexibility in incoming and outgoing
data formats. "
+ + "The Processor must be configured with at least one user-defined
property. The name of the Property "
+ + "is the Relationship to route data to, and the value of the Property
is a SQL SELECT statement that is used to specify how input data should be
transformed/filtered. "
+ + "The SQL statement must be valid ANSI SQL and is powered by Apache
Calcite. "
+ + "If the transformation fails, the original FlowFile is routed to the
'failure' relationship. Otherwise, the data selected will be routed to the
associated "
+ + "relationship. See the Processor Usage documentation for more
information.")
+@DynamicRelationship(name="<Property Name>", description="Each
user-defined property defines a new Relationship for this Processor.")
+@DynamicProperty(name = "The name of the relationship to route data to",
value="A SQL SELECT statement that is used to determine what data should be
routed to this "
+ + "relationship.", supportsExpressionLanguage=true,
description="Each user-defined property specifies a SQL SELECT statement to run
over the data, with the data "
+ + "that is selected being routed to the relationship whose name is
the property name")
+public class QueryFlowFile extends AbstractProcessor {
+ static final PropertyDescriptor RECORD_READER_FACTORY = new
PropertyDescriptor.Builder()
+ .name("Record Reader")
--- End diff --
The latest conventional wisdom has been to use a more machine-friendly name
like "query-ff-record-reader" for the name() and "Record Reader" as
displayName()
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
