[CALCITE-6026] MongoDB: Column is not quoted in "order by" clause and throws JsonParseException #3443
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… throws JsonParseException
The following query fails with a `JsonParseException`:
```sql
select state as "STATE", avg(pop) as "AVG(pop)"
from zips
group by "STATE"
order by "AVG(pop)"
```
Stack trace:
```
org.bson.json.JsonParseException: JSON reader was expecting ':' but found '('.
at org.bson.json.JsonReader.readBsonType(JsonReader.java:150)
at org.bson.codecs.BsonDocumentCodec.decode(BsonDocumentCodec.java:85)
at org.bson.codecs.BsonDocumentCodec.decode(BsonDocumentCodec.java:42)
at org.bson.codecs.BsonDocumentCodec.readValue(BsonDocumentCodec.java:104)
at org.bson.codecs.BsonDocumentCodec.decode(BsonDocumentCodec.java:87)
at org.bson.BsonDocument.parse(BsonDocument.java:66)
at org.apache.calcite.adapter.mongodb.MongoTable.aggregate(MongoTable.java:138)
at org.apache.calcite.adapter.mongodb.MongoTable.access$200(MongoTable.java:53)
at org.apache.calcite.adapter.mongodb.MongoTable$MongoQueryable.aggregate(MongoTable.java:189)
```
This is caused by the column name in the `order by` clause not being escaped.
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The following query fails with a
JsonParseException:Stack trace:
This is caused by the column name in the
order byclause not being escaped.