Github user hyunsik commented on a diff in the pull request:
https://github.com/apache/tajo/pull/1016#discussion_r63132603
--- Diff:
tajo-catalog/tajo-catalog-common/src/main/java/org/apache/tajo/catalog/statistics/TableStats.java
---
@@ -85,13 +88,17 @@ public TableStats(CatalogProtos.TableStatsProto proto) {
this.columnStatses = new ArrayList<>();
for (CatalogProtos.ColumnStatsProto colProto : proto.getColStatList())
{
- if (colProto.getColumn().getDataType().getType() ==
TajoDataTypes.Type.PROTOBUF) {
+ if (peekType(colProto.getColumn().getType()) == PROTOBUF) {
continue;
}
columnStatses.add(new ColumnStats(colProto));
}
}
+ private static TajoDataTypes.Type peekType(TypeProto proto) {
+ return proto.getElements(proto.getElementsCount() - 1).getKind();
--- End diff --
A TypeProto consists of a number of TypeElements, sorted in a depth-first
order of nested types. The last element means its actual type instead of nested
or children types. For example, a map type ```map<text, int>``` will be stored
in the list of TypeElement as follows: ```[TEXT, INT, MAP]```. ```peekType()```
will just return ```MAP```.
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