Jackie-Jiang commented on a change in pull request #5746:
URL: https://github.com/apache/incubator-pinot/pull/5746#discussion_r460436632
##########
File path:
pinot-core/src/main/java/org/apache/pinot/core/data/recordtransformer/PinotDataType.java
##########
@@ -632,4 +721,22 @@ public static PinotDataType getPinotDataType(FieldSpec
fieldSpec) {
"Unsupported data type: " + dataType + " in field: " +
fieldSpec.getName());
}
}
+
+ public static PinotDataType getSpecificMapDataTypeFromMap(Map<Object,
Object> map) {
+ Iterator<Object> iterator = map.values().iterator();
+ Object obj = iterator.next();
+ if (obj instanceof Integer) {
+ return PinotDataType.INTEGER_MAP;
+ } else if (obj instanceof Long) {
+ return PinotDataType.LONG_MAP;
+ } else if (obj instanceof Float) {
+ return PinotDataType.FLOAT_MAP;
+ } else if (obj instanceof Double) {
+ return PinotDataType.DOUBLE_MAP;
+ } else if (obj instanceof String) {
+ return PinotDataType.STRING_MAP;
+ } else {
+ throw new IllegalStateException(String.format("'%s' isn't supported in
the hash map.", obj.getClass()));
Review comment:
How about nested Map? How about single-entry map with multi-valued value
(e.g. `Object[]`)?
##########
File path:
pinot-core/src/main/java/org/apache/pinot/core/data/recordtransformer/DataTypeTransformer.java
##########
@@ -56,6 +56,7 @@
MULTI_VALUE_TYPE_MAP.put(Float.class, PinotDataType.FLOAT_ARRAY);
MULTI_VALUE_TYPE_MAP.put(Double.class, PinotDataType.DOUBLE_ARRAY);
MULTI_VALUE_TYPE_MAP.put(String.class, PinotDataType.STRING_ARRAY);
+ MULTI_VALUE_TYPE_MAP.put(HashMap.class, PinotDataType.MAP);
Review comment:
`HashMap` is not good enough, should use `instanceof Map` instead
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