Commit graph

29 commits

Author SHA1 Message Date
Nick Alexander
d49f702512 Part 1: Expand Binding::val() into Binding::{into_*,as_*}.
This is simply for completeness: we should provide fundamental
conversion patterns even when they are mostly unused in our code base.
2018-07-05 16:45:42 -07:00
Grisha Kruglov
4e01929334 Convert src/ to failure. 2018-06-20 14:42:18 -07:00
Nick Alexander
47441f56dc Part 5: Push FindQuery into query-algebrizer; structure errors.
This is a big deck-chair re-arrangement.  This puts FindQuery into
query-algebrizer and puts the validation from ParsedFindQuery ->
FindQuery their as well.

Some tests were re-homed for this.

In addition, the little-used maplit crate dependency was replaced with
inline expressions.
2018-06-04 15:04:39 -07:00
Richard Newman
3dc68bcd38 Combine NamespacedKeyword and Keyword. (#689) r=nalexander
* Make properties on NamespacedKeyword/NamespacedSymbol private

* Use only a single String for NamespacedKeyword/NamespacedSymbol

* Review comments.

* Remove unsafe code in namespaced_name.

Benchmarking shows approximately zero change.

* Allow the types of ns and name to differ when constructing a NamespacedName.

* Make symbol namespaces optional.

* Normalize names of keyword/symbol constructors.

This will make the subsequent refactor much less painful.

* Use expect not unwrap.

* Merge Keyword and NamespacedKeyword.
2018-05-11 09:52:17 -07:00
Richard Newman
e21156a754
Implement simple pull expressions (#638) r=nalexander
* Refactor AttributeCache populator code for use from pull.

* Pre: add to_value_rc to Cloned.

* Pre: add From<StructuredMap> for Binding.

* Pre: clarify Store::open_empty.

* Pre: StructuredMap cleanup.

* Pre: clean up a doc test.

* Split projector crate. Pass schema to projector.

* CLI support for printing bindings.

* Add and use ConjoiningClauses::derive_types_from_find_spec.

* Define pull types.

* Implement pull on top of the attribute cache layer.

* Add pull support to the projector.

* Parse pull expressions.

* Add simple pull support to connection objects.

* Tests for pull.

* Compile with Rust 1.25.

The only choice involved in this commit is that of replacing the
anonymous lifetime '_ with a named lifetime for the cache; since we're
accepting a Known, which includes the cache in question, I think it's
clear that we expect the function to apply to any given cache
lifetime.

* Review comments.

* Bail on unnamed attribute.

* Make assert_parse_failure_contains safe to use.

* Rework query parser to report better errors for pull.

* Test for mixed wildcard and simple attribute.
2018-05-04 12:56:00 -07:00
Richard Newman
a2e13f624c
Add 'Binding', a structured value type to return from queries. (#657) r=nalexander
Bump to 0.7: breaking change.
2018-04-24 15:08:38 -07:00
Richard Newman
a74a2deffc
Introduce RelResult rather than Vec<Vec<TypedValue>>. (#639) r=nalexander
* Pre: clean up core/src/lib.rs.
* Pre: use indexmap 1.0 in db and query-projector.
* Change rel results to be a RelResult instance, not a Vec<Vec<TypedValue>>.

This avoids memory fragmentation and improves locality by using a single
heap-allocated vector for all bindings, rather than a separate
heap-allocated vector for each row.

We hide this abstraction behind the `RelResult` type, which tracks the
stride length (width) of each row.

* Don't allocate temporary vectors when projecting RelResults.
2018-04-24 15:04:00 -07:00
Richard Newman
f42ae35b70 Update cache on write. (#566) r=emily
* Use the cache to make constant queries super fast.
* Fix translate tests to match: we no longer generate SQL for many of them!
* Accumulate additions and removals into the cache.
    * Make attribute cache clone-on-write; store it in Metadata.
    * Allow caching of fulltext attributes, interning strings.
2018-03-06 09:01:20 -08:00
Richard Newman
e33fe71c47 Rework caching and use it inside the query engine. (#553) r=emily
This puts caching in mentat_db, adds a reverse lookup capability for
unique attributes, and populates bidirectional caches with a single
SQL cursor walk.

Differentiate between begin_read and begin_uncached_read.

Note that we still allow toggling within InProgress, because there might be
transient local state that makes starting a new transaction impossible.
2018-02-21 11:51:45 -08:00
Kit Cambridge
a6341f6fd6 Implement q_prepare with pre-bound variables. r=rnewman 2018-02-07 21:48:05 -08:00
Emily Toop
715d434945
Create generalized in-memory cache for attributes (#525)
* Nit: Alphabetical ordering of imports

* Create Cache and provide functions for calling it

* Get tests working. Move to using NamespacedKeyword over KnownEntid in function signature

* Add is_cached check to caching tests

* Move lazy and add/remove boolean flags to enums

* Move function definitions into generic trait and implement trait for AttributeCache

* Remove lazy cache and generalize cache

* Update tests

* Eager cache becomes simple key value store. AttributeMap handles attribute storing specifics

* Update tests to test presence of correct values in cache

* Move EagerCache, AttributeValueProvider and ValueProvider into mentat_db

* Add test for get_for_entid

* Add test for lookup attribute

* Make caches cloneable. Add value_for alongside values_for

* Use cache in attribute lookups

* Split test for values and value and add cardinality

* address review feedback r=rnewman
2018-02-07 10:56:12 -08:00
Richard Newman
66e6fef75e Define Store, use TabWriter in the CLI for aligning columnar output. (#540) r=emily
* Define Store, which is a simple container for a SQLite connection and a Conn.
  This is a breaking change.
* Return the FindSpec as part of QueryOutput, not just results.
* Switch to using stderr in appropriate places in CLI.
* Print columns in CLI output.
2018-02-01 09:29:07 -08:00
Richard Newman
4acc6d0658 InProgressRead, KnownEntid. r=nalexander,emily
Improve naming of read-only transactions.
    Implement entid_for_type.
    Simplify get_attribute.
    Name ignored var in algebrizer.
    Comment attribute_for_ident.
    Make KnownEntid a core concept.
    Expose lookup_value_for_attribute.
    Implement HasSchema and a new query encapsulation on Conn.
    Pre: export Queryable.
2018-01-23 08:40:18 -08:00
Richard Newman
6797a606b5 Preliminary work for vocabulary management. r=emily,nalexander
Pre: export AttributeBuilder from mentat_db.
Pre: fix module-level comment for tx/src/entities.rs.
Pre: rename some `to_` conversions to `into_`.
Pre: make AttributeBuilder::unique less verbose.
Pre: split out a HasSchema trait to abstract over Schema.
Pre: rename SchemaMap/schema_map to AttributeMap/attribute_map.
Pre: TypedValue/NamespacedKeyword conversions.
Pre: turn Unique and ValueType into TypedValue::Keyword.
Pre: export IntoResult.
Pre: export NamespacedKeyword from mentat_core.
Pre: use intern_set in tx.
Pre: add InternSet::len.
Pre: comment gardening.
Pre: remove inaccurate TODO from TxReport comment.
2018-01-23 08:25:32 -08:00
Thom
023fd9b70b
Add a command to the CLI that displays the SQL and query plan for a query. Fixes #428. (#523) r=rnewman 2018-01-19 19:44:39 -05:00
Richard Newman
e8ec59e464
Implement a simple direct lookup API. Fixes #111 (#503) r=grisha
* Add some helpers and refactor how queries are run (once).
* Implement lookup_value_for_attribute.
* Add a multi-value test for lookup_value_for_attribute.
2017-12-11 11:08:10 -08:00
Richard Newman
a3b8fd3022 Add results type unwrapping helpers. 2017-12-06 14:47:29 -08:00
Richard Newman
df90c366af
Partial work from simple aggregates work (#497) r=nalexander
* Pre: make FindQuery, FindSpec, and Element non-Clone.
* Pre: make query translator return a Result.
* Pre: make projection return a Result.
* Pre: refactor query parser in preparation for parsing aggregates.
* Pre: rename PredicateFn -> QueryFunction.
* Pre: expose more about bound variables from CC.
* Pre: move ValueTypeSet to core.
2017-11-30 15:02:07 -08:00
Richard Newman
bc63744aba Add :limit to queries (#420) r=nalexander
* Pre: put query parts in alphabetical order.
* Pre: rename 'input' to 'query' in translate tests.
* Part 1: parse :limit.
* Part 2: validate and escape variable parameters in SQL.
* Part 3: algebrize and translate limits.
2017-04-19 16:16:19 -07:00
Richard Newman
60c082b61e Part 4: pass inputs through algebrizing and execution. (#418)
This also adds a test that an `UnboundVariables` error is raised if a
variable mentioned in the `:in` clause isn't bound.
2017-04-18 13:19:50 -07:00
Richard Newman
8ddbc834ae Pre: take Variables instead of Strings in public API, for now. 2017-04-18 13:19:50 -07:00
Richard Newman
a5023c70cb Use Rc for TypedValue, Variable, and query Ident keywords. (#395) r=nalexander
Part 1, core: use Rc for String and Keyword.
Part 2, query: use Rc for Variable.
Part 3, sql: use Rc for args in SQLiteQueryBuilder.
Part 4, query-algebrizer: use Rc.
Part 5, db: use Rc.
Part 6, query-parser: use Rc.
Part 7, query-projector: use Rc.
Part 8, query-translator: use Rc.
Part 9, top level: use Rc.
Part 10: intern Ident and IdentOrKeyword.
2017-04-02 21:38:36 -07:00
Richard Newman
97749833d0 Algebrize and translate numeric constraints. (#306) r=nalexander 2017-03-22 10:19:47 -07:00
Richard Newman
bf38105fef (#362) Part 4: handle unknown attributes by expanding type codes. r=nalexander
Also, don't run any SQL at all if an algebrized query is known to return no results.
2017-03-08 17:44:27 -08:00
Richard Newman
e898df8842 Implement basic query limits. (#361) r=nalexander 2017-03-08 17:41:42 -08:00
Richard Newman
70b112801c Implement projection and querying. (#353) r=nalexander
* Add a failing test for EDN parsing '…'.
* Expose a SQLValueType trait to get value_type_tag values out of a ValueType.
* Add accessors to FindSpec.
* Implement querying.
* Implement rudimentary projection.
* Export mentat_db::new_connection.
* Export symbols from mentat.
* Add rudimentary end-to-end query tests.
2017-03-06 14:40:10 -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
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
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