couchbase / couchbase/n1fty

need to support WHERE / Index.Cond()

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Dominant language
Go
Stars
2
Forks
4
PR merge metrics
No merged PRs in 30d

Description

An FTS Index that has type mappings is basically translatable, where each type mapping translates to another Index with a different WHERE or Index.Cond().

https://github.com/couchbase/n1fty/blob/7b74840ba11976e200eeecb98eb1c53081441876/index.go#L93

The idea, let's say I have an FTS index "myFTSIdx" on the beer-sample bucket that looks like...

  type: beer
      mapping of the beer fields
  type: brewery
      mapping of the brewery fields
  default:
      mapping of the fields that aren't "type" of beer nor brewery

So, that would get expressed as 3 different Indexes...

Index myFTSIdx-beer
   Cond() => "type = 'beer'"

Index myFTSIdx-brewery
   Cond() => "type = 'brewery'"

Index myFTSIdx-default
   Cond() => "type != 'beer' AND type != 'brewery'"

Also, better double-check with Sitaram that this is the correct expression.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with index.go at the linked location to understand how an FTS index with type mappings is translated. Confirm the intended WHERE or Index.Cond() expressions with Sitaram, including the default mapping case. Done means each type mapping is represented by a corresponding Index with the correct condition.

Written by the indexing model from the issue text.

Assessment

Tech stack
go
Domain
search
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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