daca8def57
* Pre: unused import in translate.rs. * Part 2: take a dependency on rusqlite for query arguments. * Part 1: flatten V2 schema into V1. Add UUID and URI. Bump expected ident and bootstrap datom count in tests. * Part 5: parse edn::Value::Uuid. * Part 3: extend ValueType and TypedValue to include Uuid. * Part 4: add Uuid to query arguments. * Part 6: extend db to support Uuid. * Part 8: add a tx-parser test for #f NaN and #uuid. * Part 7: parse and algebrize UUIDs in queries. * Part 1: parse #inst in EDN and throughout query engine. * Part 3: handle instants in db. * Part 2: instants never matches integers in queries. * Part 4: use DateTime for tx_instants. * Add a test for adding and querying UUIDs and instants. * Review comments.
102 lines
2.7 KiB
Rust
102 lines
2.7 KiB
Rust
// Copyright 2016 Mozilla
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
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// this file except in compliance with the License. You may obtain a copy of the
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// License at http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software distributed
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// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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// CONDITIONS OF ANY KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations under the License.
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#[macro_use]
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extern crate error_chain;
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extern crate itertools;
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#[macro_use]
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extern crate lazy_static;
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extern crate rusqlite;
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extern crate tabwriter;
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extern crate time;
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#[macro_use]
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extern crate edn;
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extern crate mentat_core;
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extern crate mentat_tx;
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extern crate mentat_tx_parser;
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use std::iter::repeat;
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use itertools::Itertools;
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use mentat_core::{
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DateTime,
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UTC,
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};
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pub use errors::{Error, ErrorKind, ResultExt, Result};
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pub mod db;
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mod bootstrap;
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pub mod debug;
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mod add_retract_alter_set;
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mod entids;
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pub mod errors;
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mod metadata;
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mod schema;
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mod types;
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mod internal_types;
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mod upsert_resolution;
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mod tx;
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pub use db::{
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TypedSQLValue,
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new_connection,
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};
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pub use tx::transact;
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pub use types::{
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DB,
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PartitionMap,
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TxReport,
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};
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use edn::symbols;
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pub fn to_namespaced_keyword(s: &str) -> Result<symbols::NamespacedKeyword> {
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let splits = [':', '/'];
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let mut i = s.split(&splits[..]);
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let nsk = match (i.next(), i.next(), i.next(), i.next()) {
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(Some(""), Some(namespace), Some(name), None) => Some(symbols::NamespacedKeyword::new(namespace, name)),
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_ => None,
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};
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// TODO Use custom ErrorKind https://github.com/brson/error-chain/issues/117
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nsk.ok_or(ErrorKind::NotYetImplemented(format!("InvalidNamespacedKeyword: {}", s)).into())
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}
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/// Prepare an SQL `VALUES` block, like (?, ?, ?), (?, ?, ?).
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///
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/// The number of values per tuple determines `(?, ?, ?)`. The number of tuples determines `(...), (...)`.
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///
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/// # Examples
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///
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/// ```rust
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/// # use mentat_db::{repeat_values};
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/// assert_eq!(repeat_values(1, 3), "(?), (?), (?)".to_string());
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/// assert_eq!(repeat_values(3, 1), "(?, ?, ?)".to_string());
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/// assert_eq!(repeat_values(2, 2), "(?, ?), (?, ?)".to_string());
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/// ```
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pub fn repeat_values(values_per_tuple: usize, tuples: usize) -> String {
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assert!(values_per_tuple >= 1);
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assert!(tuples >= 1);
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// Like "(?, ?, ?)".
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let inner = format!("({})", repeat("?").take(values_per_tuple).join(", "));
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// Like "(?, ?, ?), (?, ?, ?)".
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let values: String = repeat(inner).take(tuples).join(", ");
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values
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}
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/// Return the current time as a UTC `DateTime` instance.
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pub fn now() -> DateTime<UTC> {
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UTC::now()
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}
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