1
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This code appends a boolean column to all documents in the birds collection.

db.birds
  .find()
  .snapshot()
  .forEach(function(el) {
    el.hi = true
    db.birds.save(el)
  })

Here's how the command is run in production.

mongo db_stuff/db_name -u username -p password theScript.js

This command runs very slowly. Should I look into the $set operator or something else that will speed this up?

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  • \$\begingroup\$ What does your db look like? Size? Columns? Types? A schema is usually required when asking about db optimisations. \$\endgroup\$ – Mast Feb 21 '18 at 9:48
-1
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This is a lot faster:

db. birds.updateMany(
   {},
   { $set:
      {
        hi: true
      }
   }
)
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  • 5
    \$\begingroup\$ That's great! But this is not a review :-( \$\endgroup\$ – t3chb0t Feb 19 '18 at 22:47
  • \$\begingroup\$ This is definitely the way to go. \$\endgroup\$ – Yitzchok Feb 20 '18 at 4:30

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