ddl-manager/TODO.md

store postgres procedures and triggers in files

+ cache name should be unique for table
+ cancel update rows from prev run (Migrator)
+ new command: update cache rows
+ fix long names > 64
    + fix signature (for detect changes)
    + fix object.toSQL 
    + log warning: name XXXX too long (> 64 symbols)
- test errors on:
    + hard select query
      + sub query
      + group by
      + with
      + union
      - no hard "order by" for aggregations
    + no column name in select
    - no columns
    + column name is not unique
    + exists same column name in another cache in another file
    - no universal triggers option: error on using universal triggers
+ diff: compare caches
+ Migrator: 
  + i can rename cache but, don't need recreate columns and update rows,
        need change only triggers
  + do not drop cache columns if no changes
  + do not drop cache columns if same columns exists in db
  + need REAL load schema
  + universal agg
  + first agg
  + last agg
  + date_or_null_agg
  + cache like are
    cache totals for companies (
      select companies.id * 2
    )
      ! before insert/update => need listen more fields in other caches
      => use after
+ other helper functions
+ don't create cache triggers for some tables
    cache totals for companies (
      select
        string_agg(distinct order_type.name) as orders_types_names
      from orders
      left join order_type on
        order_type.id = orders.id_order_type
    )
    without triggers on order_type

- fix renaming file or directory
- find and fix any TODO:
+ log building cache
+ log update cache columns
  + fix package number
+ when need drop function while trigger is frozen, but function not
+ when not all columns or trigger exists for cache, need rebuild cache
- timeline
- test triggers with: select limit 1 order by desc/asc
+ change sleep ms in tests
- remove unfreeze command
- PostgresDriver: add command: commentOn(obj, comment)
- split PostgresDrivers
- refactor: build database state from fs and compare two databases
- test string_agg(distinct some order by some)
- test string_agg(distinct some order by joined field)
- test string_agg(some) filter (where joined field)
- test all combinations for commutative triggers
  - create table with all variants
- test array_agg with id as bigint
+ replace all string_agg to UniversalAgg ?
+ remove filter from UniversalAgg 
  + and don't aggregate filter values
- filter by companies
+ fix condition: unit.operations && array[ operation.id ]::bigint[]
+ log migration in watcher mode
- test recreating cache after syntax error
- test not( null::text in ('car', 'truck') )

- one last row
  + before insert trigger
  + create helper column
  + test trigger working with Desc by id
  + test trigger working with Asc by id
  + test trigger working with Desc by mutable
  + test trigger working with Asc by mutable
  + test filling __first_auto_for_order flag
  - multi reference by array 
- test commutative cache working with insert/deleted ids
  - data fields change and reference fields change

1. autofix for 
bigint[] && integer[]

auto reverse conditions for index scan
    1. migrations
    2. cache search


2. fix twice build cache
cache orders_ids for request_currency_translation
    changes column type
    => need rebuild cache trigger 
    cache orders_numbers for request_currency_translation
parallel threads by min/max
combine same cache updates
disable all triggers
    update also deps caches
    rename database while pgMigrate
    rename database back on rollback