You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@pinot.apache.org by "chenboat (via GitHub)" <gi...@apache.org> on 2023/06/13 21:24:37 UTC

[GitHub] [pinot] chenboat commented on a diff in pull request #10885: Add clpDecode transform function for decoding CLP-encoded fields.

chenboat commented on code in PR #10885:
URL: https://github.com/apache/pinot/pull/10885#discussion_r1228711755


##########
pinot-core/src/main/java/org/apache/pinot/core/operator/transform/function/CLPDecodeTransformFunction.java:
##########
@@ -0,0 +1,120 @@
+/**
+ * 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.pinot.core.operator.transform.function;
+
+import com.google.common.base.Preconditions;
+import com.yscope.clp.compressorfrontend.BuiltInVariableHandlingRuleVersions;
+import com.yscope.clp.compressorfrontend.MessageDecoder;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import org.apache.pinot.common.function.TransformFunctionType;
+import org.apache.pinot.core.operator.ColumnContext;
+import org.apache.pinot.core.operator.blocks.ValueBlock;
+import org.apache.pinot.core.operator.transform.TransformResultMetadata;
+import org.apache.pinot.spi.data.FieldSpec;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static org.apache.pinot.spi.data.FieldSpec.DEFAULT_DIMENSION_NULL_VALUE_OF_STRING;
+
+
+/**
+ * Decodes a CLP-encoded column group into the original value. In Pinot, a CLP-encoded field is encoded into three
+ * Pinot columns, what we collectively refer to as a column group. E.g., A CLP-encoded "message" field would be
+ * stored in three columns: "message_logtype", "message_dictionaryVars", and "message_encodedVars".
+ * <p>
+ * Usage:
+ * <pre>
+ *   clpDecode("columnGroupName_logtype", "columnGroupName_dictionaryVars",
+ *             "columnGroupName_encodedVars"[, defaultValue])
+ * </pre>
+ * The "defaultValue" is optional and is used when a column group can't be decoded for some reason.
+ * <p>
+ * Sample queries
+ * <pre>
+ *   SELECT clpDecode("message_logtype", "message_dictionaryVars", "message_encodedVars") FROM table
+ *   SELECT clpDecode("message_logtype", "message_dictionaryVars", "message_encodedVars", 'null') FROM table

Review Comment:
   Can you add one example with an input and output of the transformation function?



-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: commits-unsubscribe@pinot.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org


---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscribe@pinot.apache.org
For additional commands, e-mail: commits-help@pinot.apache.org