matthewmturner commented on issue #1488:
URL: 
https://github.com/apache/arrow-datafusion/issues/1488#issuecomment-1001305863


   @liukun4515 thanks for the help looking into this.
   
   I'm aligned with your thinking - but it does seem something else is still 
off.  below is the head of the csv file.  the float field is not quoted.
   
   ```
   $ head -n 25 J1_1e7_NA_0_0.csv
   id1,id2,id3,id4,id5,id6,v1
   10,5159,8771892,id10,id5159,id8771892,91.827108
   7,8469,6597185,id7,id8469,id6597185,48.147306
   6,7510,10742226,id6,id7510,id10742226,53.125234
   10,3114,4468842,id10,id3114,id4468842,96.488041
   3,6139,7725507,id3,id6139,id7725507,56.095139
   8,5330,3935410,id8,id5330,id3935410,0.349572
   10,9278,1617200,id10,id9278,id1617200,68.425456
   3,2328,9892050,id3,id2328,id9892050,62.356196
   4,4500,4713401,id4,id4500,id4713401,57.149024
   3,1782,2296556,id3,id1782,id2296556,94.777187
   3,8728,5951049,id3,id8728,id5951049,67.679287
   8,4718,9297336,id8,id4718,id9297336,24.238334
   11,8211,5318127,id11,id8211,id5318127,66.530629
   2,2709,8769384,id2,id2709,id8769384,52.903976
   3,5280,1083694,id3,id5280,id1083694,12.481477
   8,2883,9801933,id8,id2883,id9801933,49.100595
   2,8989,6380263,id2,id8989,id6380263,40.005564
   11,9768,9715707,id11,id9768,id9715707,40.54798
   5,10744,9149552,id5,id10744,id9149552,3.472602
   6,1194,6141889,id6,id1194,id6141889,3.986312
   5,1270,7381972,id5,id1270,id7381972,98.386565
   4,8238,1702432,id4,id8238,id1702432,81.020402
   4,8459,6190403,id4,id8459,id6190403,87.17891
   11,205,9363336,id11,id205,id9363336,94.937556
   ```


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