Commit graph

774 commits

Author SHA1 Message Date
Nick Alexander
f86b24001f Add top-level Conn. Fixes #296. (#342) r=rnewman
* Add top-level `Conn`. Fixes #296.

This is a little different than the API rnewman and I originally
discussed in https://public.etherpad-mozilla.org/p/db-conn-thoughts.
A few notes:

- I was led to make a `Schema` instance the thing that is shared,
  rather than a `db::DB`.  It's possible that queries will want to
  know the current transaction at some point (to prevent races, or to
  query historical data), but that can be a future consideration.

- The generation number just allows for a cheap comparison.  I don't
  care to handle races to transact just yet; the long term plan might
  be to make embedding applications responsible for avoiding races, or
  we might handle queuing transactions and yielding report futures in
  Mentat itself.

- The sharing of the partition maps is a little more subtle than
  expected.  Partition maps are volatile: a successful Mentat
  transaction always advances the :db.part/tx partition, so it's not
  worth passing references around.  This means that consumers must
  clone in order to maintain just a single clone per transaction.

Clean some cruft.

* Review comments.
2017-03-03 15:03:59 -08:00
Richard Newman
ecf56395b9 Add discussion of storage difficulties. r=nalexander (#344)
* Add discussion of storage difficulties.

* Replace mention of MVP with discussion of initial requirements.
2017-02-27 16:19:23 -08:00
Richard Newman
d7f323d15d Wire in the start of querying and error_chain at top level. (#349) r=nalexander 2017-02-27 16:17:25 -08:00
Richard Newman
48312e1ff0 Rebased conversion of mentat_query_parser to use error-chain. r=nalexander
This is a tiny bit simpler and more consistent.
2017-02-27 16:16:54 -08:00
Richard Newman
b2f22952c1 Convert mentat_sql to use error-chain. r=nalexander 2017-02-27 16:16:49 -08:00
Nick Alexander
dcd9bcb1ce Extract partial storage abstraction; use error-chain throughout. Fixes #328. r=rnewman (#341)
* Pre: Drop unneeded tx0 from search results.

* Pre: Don't require a schema in some of the DB code.

The idea is to separate the transaction applying code, which is
schema-aware, from the concrete storage code, which is just concerned
with getting bits onto disk.

* Pre: Only reference Schema, not DB, in debug module.

This is part of a larger separation of the volatile PartitionMap,
which is modified every transaction, from the stable Schema, which is
infrequently modified.

* Pre: Fix indentation.

* Extract part of DB to new SchemaTypeChecking trait.

* Extract part of DB to new PartitionMapping trait.

* Pre: Don't expect :db.part/tx partition to advance when tx fails.

This fails right now, because we allocate tx IDs even when we shouldn't.

* Sketch a db interface without DB.

* Add ValueParseError; use error-chain in tx-parser.

This can be simplified when
https://github.com/Marwes/combine/issues/86 makes it to a published
release, but this unblocks us for now.  This converts the `combine`
error type `ParseError<&'a [edn::Value]>` to a type with owned
`Vec<edn::Value>` collections, re-using `edn::Value::Vector` for
making them `Display`.

* Pre: Accept Borrow<Schema> instead of just &Schema in debug module.

This makes it easy to use Rc<Schema> or Arc<Schema> without inserting
&* sigils throughout the code.

* Use error-chain in query-parser.

There are a few things to point out here:

- the fine grained error types have been flattened into one crate-wide
  error type; it's pretty easy to regain the granularity as needed.

- edn::ParseError is automatically lifted to
  mentat_query_parser::errors::Error;

- we use mentat_parser_utils::ValueParser to maintain parsing error
  information from `combine`.

* Patch up top-level.

* Review comment: Only `borrow()` once.
2017-02-24 15:33:48 -08:00
Richard Newman
5e3cdd1fc2 Implement query-translator. (#301) r=nalexander 2017-02-23 18:39:49 -08:00
Richard Newman
91c75f26c8 Expand query algebrizer. r=nalexander 2017-02-23 18:39:49 -08:00
Richard Newman
76f51015d9 Support accumulating TypedValue instances into a SQL query. (#339) r=nalexander
These expand into a collection of named variables that should be
passed via bind parameters when the query is executed.

Bind parameters are now only named.
2017-02-23 18:39:43 -08:00
Richard Newman
b0120aa446 Pre: fix query/Cargo.toml indenting. 2017-02-23 18:31:57 -08:00
Richard Newman
14972fa6d7 Pre: use Option::cloned() instead of a cloning closure. 2017-02-23 18:31:54 -08:00
Joe Walker
40bca2df6d Remove most uses of use foo::* 2017-02-23 14:09:54 +00:00
Joe Walker
60b2e6f885 Improve Debug output for ConjoiningClauses; r=rnewman
Fixes #317, and also removes the '::' exploration of rust style
2017-02-23 14:05:56 +00:00
Victor Porof
7fc2a22d68 Implement a basic edn matcher, r=ncalexan (#271) (#338)
Signed-off-by: Victor Porof <victor.porof@gmail.com>
2017-02-23 09:11:34 +01:00
Victor Porof
bf707acbc3 Lint for the clippy gods in the edn crate (#340)
Signed-off-by: Victor Porof <victor.porof@gmail.com>
2017-02-22 18:11:05 +01:00
Victor Porof
0d3b8e4b29 Avoid code duplication for common Value trait implementations, r=ncalexan
Signed-off-by: Victor Porof <victor.porof@gmail.com>
2017-02-22 08:36:45 +01:00
Victor Porof
1b26e23d02 Implement edn pretty printing using pretty.rs. Fixes #195. (#245)
* Implement pretty printing

Signed-off-by: Victor Porof <victor.porof@gmail.com>

* Rewrite pretty printing.

This does a few things.  First, it use pretty.rs directly, without the
layer of macro obfuscation.  The code is significantly simpler as a
result.

Second, it tightens the layout, using pretty.rs to group nested
layouts that fit on a single line.  This is Clojure's EDN style, more
or less.

Third, it drops "special format" support for queries.  This wasn't
completely implemented; if we want it, we can newtype
Query(edn::Value) and figure out how to really implement this idea.

* Rename to reflect functionality.

* Make write interface more Rust-like.

There isn't a clear standard in the stdlib, but a function that takes
ownership of a writer and then returns it back is definitely not
Rust-like.  That's what a (mutable) reference is for.

* Review comment: Use as_ref to avoid cloning strings.

* Post: Fix tests to use `without_spans()`.
2017-02-21 11:48:08 -08:00
Richard Newman
7476d0c0c8 More Rust notes. 2017-02-21 10:45:21 -08:00
Richard Newman
e18a0e9fdc Discuss Rust contributions. 2017-02-21 10:43:36 -08:00
Richard Newman
6fa907d2df Simplify .travis.yml to use cargo test --all. 2017-02-20 11:04:18 -08:00
Richard Newman
a10f68fdb7 Mark every project as being part of the workspace. r=nalexander
This allows `cargo test --all` to work.
2017-02-20 11:04:08 -08:00
Richard Newman
42ae26ab46 Add new stuff to Travis. 2017-02-17 17:54:35 -08:00
Richard Newman
9ecd02ef95 Begin serializing queries to SQL. r=nalexander 2017-02-17 17:54:07 -08:00
Richard Newman
a9cd9b1e87 Export symbols and string helpers from mentat_query_algebrizer. 2017-02-17 17:54:07 -08:00
Richard Newman
f890995202 Add a rudimentary SQL builder, based on parts of Diesel. (#273) r=nalexander
https://github.com/diesel-rs/diesel/
2017-02-17 17:53:50 -08:00
Jordan Santell
bc2b2ec4c8 Change to_namespaced_keyword(s) to return a Result rather than Option to (#333)
reduce error handling throughout db code. Fixes #331. r=nalexander
2017-02-17 16:10:34 -08:00
Jordan Santell
6f67f8563b TypedValue::Keyword now wraps a NamespacedKeyword rather than a String. Fixes #203. r=nalexander" (#329) 2017-02-17 14:07:57 -08:00
Jordan Santell
a59f9583ac Store Idents as NamespacedKeywords, rather than Strings. Fixes #291. (#300)
r=ncalexander
2017-02-17 13:55:36 -08:00
Jordan Santell
ec2bbb8e83 Ensure minimum rustc version in a build script. r=nalexander (#326)
Printing out failure to meet rustc version helps users during
setup with a helpful message if using an older rustc.
Rust version checking from http://stackoverflow.com/a/36607492.
2017-02-17 12:04:45 -08:00
Victor Porof
896d7f8f88 Add a span component to edn::Value, r=ncalexan
Signed-off-by: Victor Porof <victor.porof@gmail.com>
2017-02-17 18:31:26 +01:00
Joe Walker
d9b699b588 Fix the authors entry in Cargo.toml (#322) 2017-02-17 08:03:48 +01:00
Joe Walker
89949fb451 Update README for edn; r=me 2017-02-16 18:32:36 +00:00
Richard Newman
5af7082165 Partly flesh out query algebrizer. (#243) r=nalexander 2017-02-15 16:10:59 -08:00
Richard Newman
f36a78e61e Test mentat_core and mentat_query_algebrizer on Travis. 2017-02-15 16:01:22 -08:00
Richard Newman
42f03f55a2 Stub out query algebrizer. 2017-02-15 16:01:22 -08:00
Richard Newman
b165a0b2ad Implement Schema::attribute_for_ident. 2017-02-15 16:01:22 -08:00
Nick Alexander
16e9740d8a Implement upsert resolution algorithm. (#186, #283). r=rnewman, f=jsantell
* Pre: Implement batch [a v] pair lookup.

* Pre: Add InternSet for sharing ref-counted handles to large values.

* Pre: Derive more for Entity.

* Pre: Return DB from creating; return TxReport from transact.

I explicitly am not supporting opening existing databases yet, let
alone upgrading databases from earlier versions.  That can follow fast
once basic transactions are supported.

* Pre: Parse string temporary ID entities; remove ValueOrLookupRef.

This adds TempId entities, but we can't disambiguate String temporary
IDs from values without the use of the schema, so there's no new value
branch.  Similarly, we can't disambiguate lookup-ref values from two
element list values without a schema, so we remove this entirely.
We'll handle the ambiguity later in the transactor.

* Persist partitions to SQL store; allocate transaction ID. (#186)

* Post: Test upserting with vectors.

This converts an existing test to EDN:
84a80f40f5/test/datomish/db_test.cljc (L193).

* Implement tempid upsert resolution algorithm. (#184)

* Post: Separate Tx out of DB.

This is very preliminary, since we don't have a real connection type
to manage transactions and their metadata yet.

* Post: Comment on implementation choices in the transactor.

* Review comment: Put long use lists on separate lines.

* Review comment: Accept String: Borrow<S> instead of just String.

* Review comment: Address nits.
2017-02-14 16:50:40 -08:00
Richard Newman
bfb62302cb Add docstrings for Schema methods. 2017-02-13 19:39:47 -08:00
Richard Newman
a87e5a3ec7 Move Schema from mentat_db to mentat_core, improve API. (#290)
* Move Schema from mentat_db to mentat_core.
* Define SchemaMap in terms of Entid, not i64.
* Add Schema::{is_attribute,identifies_attribute}.
* Add pointer to #291.
* Don't pass around 64-bit pointers to 64-bit integers.
2017-02-13 19:20:20 -08:00
Richard Newman
2e303f4837 Stub out mentat::q_once. (#289) r=nalexander
* Leave a pointer to issue 288.
* Re-export mentat_db::types::DB from mentat_db.
* Parse EDN strings in the query parser.
* Export 'public' API from mentat_query_parser's top level.
* Stub out mentat::q_once.
2017-02-13 10:30:02 -08:00
Jordan Santell
4e81733eed Change expecteddatoms and expectedtransaction to their kebab-case counterparts, for valid EDN style. Fixes #270. r=nalexander (#287) 2017-02-11 12:06:09 -08:00
Jordan Santell
4f5c94891a Add octal, hexadecimal, and arbitrary base integers to the EDN parser. Fixes #277. r=rnewman (#286) 2017-02-10 16:03:35 -08:00
Jordan Santell
6ce5d526a3 Store a bitfield in temporary search tables and expand to bit flags in the datoms table to investigate performance difference. Fixes #226. r=nalexander (#242) 2017-02-10 12:03:49 -08:00
Joe Walker
f591c90738 Use mentat-parser-utils in tx-parser. Fixes #235; r=rnewman,victorporof
Move macros query-parser/…/parser_utils.rs → parser-utils/…/query.rs

Signed-off-by: Joe Walker <jwalker@mozilla.com>
2017-02-10 18:30:03 +00:00
Jordan Santell
1deed24f42 Remove usage of global imports in db module. Fixes #251. r=nalexander (#253) 2017-02-10 09:09:13 -08:00
Victor Porof
49f91b05b0 Expose EDN into_ methods that consume the edn value, r=jwalker. Fixes 256
Signed-off-by: Victor Porof <victor.porof@gmail.com>
2017-02-10 14:58:38 +01:00
Joe Walker
cb40a0f581 Expose EDN as_ methods that return copied values, not references; r=ncalexan,jwalker 2017-02-10 12:09:13 +00:00
Richard Newman
8e2359d3ab Implement TypedValue::is_congruent_with and ::matches_type. r=jsantell 2017-02-09 18:45:50 -08:00
Richard Newman
b56b7c2a3f ValueType is Copy. r=jsantell 2017-02-09 18:45:46 -08:00
Richard Newman
fc73bfce75 Implement NonIntegerConstant::into_typed_value. r=jsantell 2017-02-09 18:45:46 -08:00