MongoDB shell version: 3.2.6
connecting to: localhost/test
{
"_id" : ObjectId("57909e59888012cba24b0481"),
"c1" : 10000,
"c2" : 199999999,
"c3" : 223423423,
"c4" : 23423423
}
{
"_id" : ObjectId("57909e5e95474190b05b0e36"),
"c1" : NumberLong(10000),
"c2" : NumberLong(199999999),
"c3" : NumberLong(223423423),
"c4" : NumberLong(23423423)
}
{
"_id" : ObjectId("57909e797c6fa819adf3ce37"),
"c1" : 10000,
"c2" : 199999999,
"c3" : 223423423,
"c4" : 23423423
}
[mongod@localhost ~]$ mongoexport -d test -c longIntTest --type=csv -f c1,c2,c3,c4 -o longIntTest.csv
2016-07-21T18:06:37.017+0800 connected to: localhost
2016-07-21T18:06:37.019+0800 exported 3 records
[mongod@localhost ~]$ cat longIntTest.csv
c1,c2,c3,c4
10000,199999999,223423423,23423423
10000,199999999,223423423,23423423
10000,1.99999999e+08,2.23423423e+08,2.3423423e+07
[mongod@localhost ~]$ cat mongoexport_python.py
import pymongo
import sys
import csv
# establish a connection to the database
connection = pymongo.MongoClient("mongodb://localhost")
# get a handle to the school database
db=connection.test
col=db.longIntTest
try:
cursor = col.find({},{'_id':0})
except Exception as e:
print "Unexpected error:", type(e), e
with open('longIntTest_python.csv', 'w') as csvfile:
fieldnames = ['c1', 'c2','c3','c4']
writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
writer.writeheader()
for doc in cursor:
print doc
writer.writerow(doc)
[mongod@localhost ~]$ python mongoexport_python.py
{u'c3': 223423423, u'c2': 199999999, u'c1': 10000, u'c4': 23423423}
{u'c3': 223423423L, u'c2': 199999999L, u'c1': 10000L, u'c4': 23423423L}
{u'c3': 223423423.0, u'c2': 199999999.0, u'c1': 10000.0, u'c4': 23423423.0}
[mongod@localhost ~]$ cat longIntTest_python.csv
c1,c2,c3,c4
10000,199999999,223423423,23423423
10000,199999999,223423423,23423423
10000.0,199999999.0,223423423.0,23423423.0
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