Jackie-Jiang commented on code in PR #13581:
URL: https://github.com/apache/pinot/pull/13581#discussion_r1719300091
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pinot-common/src/main/java/org/apache/pinot/common/function/scalar/MapFunctions.java:
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@@ -0,0 +1,67 @@
+package org.apache.pinot.common.function.scalar;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.apache.pinot.spi.annotations.ScalarFunction;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+
+public class MapFunctions {
+ private MapFunctions() {
+ }
+
+ /**
+ * Internal Helper Function to convert Json String Values to Java Maps
+ * @param jsonString
+ * @return converted Java Map from JSON String
+ */
+ public static Map stringToMap(String jsonString) {
Review Comment:
Any specific reason why you need a `LinkedHashMap`?
`JsonUtils.stringToObject()` can be used in order to deserialize to a custom
object
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