Major - P3 Starting with MongoDB 5.0.4, db.serverStatus() adds counters for match operators.
The entry for 'metrics.operatorCounters.match' looks like:
"match": {
"$all": 0,
...
"$or": 4249,
"$regex": 21,
"$sampleRate": 0,
"$size": 0,
"$text": 0,
"$type": 7,
"$where": 0
}
The problem is with the "$regex" field that is rejected by the BSON library.
Here is short program showing the failure.
#!python
# works
regex_str_doc = """
{
"$regex": "10"
}
"""
# fails
regex_int_doc = """
{
"$regex": 10
}
"""
import bson.json_util
import pymongo
o = bson.json_util.loads(regex_str_doc) # works
#o = bson.json_util.loads(regex_int_doc) # fails