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Event store using PostgreSQL for persistence.
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lib/event_store/storage/delete_stream.ex
defmodule EventStore.Storage.DeleteStream do
@moduledoc false
require Logger
alias EventStore.Sql.Statements
def soft_delete(conn, stream_id, opts) do
{schema, opts} = Keyword.pop(opts, :schema)
query = Statements.soft_delete_stream(schema)
case Postgrex.query(conn, query, [stream_id], opts) do
{:ok, %Postgrex.Result{num_rows: 1}} ->
Logger.debug(fn -> "Soft deleted stream #{inspect(stream_id)}" end)
:ok
{:ok, %Postgrex.Result{num_rows: 0}} ->
Logger.warn(fn ->
"Failed to soft delete stream #{inspect(stream_id)} due to: stream not found"
end)
{:error, :stream_not_found}
{:error, error} = reply ->
Logger.warn(fn ->
"Failed to soft delete stream #{inspect(stream_id)} due to: " <> inspect(error)
end)
reply
end
end
def hard_delete(conn, stream_id, opts) do
{schema, opts} = Keyword.pop(opts, :schema)
query = Statements.hard_delete_stream(schema)
case Postgrex.query(conn, query, [stream_id], opts) do
{:ok, %Postgrex.Result{num_rows: 1, rows: [[^stream_id]]}} ->
Logger.debug(fn -> "Hard deleted stream #{inspect(stream_id)}" end)
:ok
{:ok, %Postgrex.Result{num_rows: 0}} ->
Logger.warn(fn ->
"Failed to hard delete stream #{inspect(stream_id)} due to: stream not found"
end)
{:error, :stream_not_found}
{:error, %Postgrex.Error{postgres: %{code: :feature_not_supported}} = error} ->
Logger.warn(fn ->
"Failed to hard delete stream #{inspect(stream_id)} due to: " <> inspect(error)
end)
{:error, :not_supported}
{:error, error} = reply ->
Logger.warn(fn ->
"Failed to hard delete stream #{inspect(stream_id)} due to: " <> inspect(error)
end)
reply
end
end
end