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chore: accept a counter option in prepare_query/3 #4714

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chore: accept a counter option in prepare_query/3 #4714

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386f47f
chore: accept a `counter` option in `prepare_query/3`
zachdaniel Apr 5, 2026
a1ec0b8
chore: PR feedabck, include index in query cache key
zachdaniel Apr 7, 2026
06cf74b
Apply suggestion from @josevalim
josevalim Apr 7, 2026
8e8b215
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josevalim Apr 7, 2026
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3 changes: 2 additions & 1 deletion lib/ecto/adapter/queryable.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -104,13 +104,14 @@ defmodule Ecto.Adapter.Queryable do
def prepare_query(operation, repo_name_or_pid, queryable, opts \\ []) do
%{adapter: adapter, cache: cache} = Ecto.Repo.Registry.lookup(repo_name_or_pid)

counter = Keyword.get(opts, :counter, 0)
query_cache? = Keyword.get(opts, :query_cache, true)

{_meta, prepared, _cast_params, dump_params} =
queryable
|> Ecto.Queryable.to_query()
|> Ecto.Query.Planner.ensure_select(operation == :all)
|> Ecto.Query.Planner.query(operation, cache, adapter, 0, query_cache?)
|> Ecto.Query.Planner.query(operation, cache, adapter, counter, query_cache?)

{prepared, dump_params}
end
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2 changes: 1 addition & 1 deletion lib/ecto/query/planner.ex
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Expand Up @@ -136,7 +136,7 @@ defmodule Ecto.Query.Planner do
def query(query, operation, cache, adapter, counter, query_cache?) do
{query, params, key} = plan(query, operation, adapter)
{cast_params, dump_params} = Enum.unzip(params)
key = if query_cache?, do: key, else: :nocache
key = if query_cache?, do: {key, counter}, else: :nocache
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@josevalim josevalim Apr 7, 2026

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@zachdaniel I thought it would be better to always add the counter, to reduce the number of branches, but it seems that either using a list is wrong or we are messing with the key in an incompatible way. Can you please take a deeper look?

query_with_cache(key, query, operation, cache, adapter, counter, cast_params, dump_params)
end

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