2018-04-05 10:09:13 +00:00
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// Copyright 2018 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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use std::collections::{
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BTreeMap,
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};
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use mentat_core::{
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DateTime,
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Entid,
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2018-05-11 16:52:17 +00:00
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Keyword,
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Binding,
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TypedValue,
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Utc,
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ValueType,
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};
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use ::{
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HasSchema,
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Queryable,
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QueryInputs,
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QueryOutput,
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2018-04-24 22:04:00 +00:00
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RelResult,
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Store,
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Variable,
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};
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use errors::{
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ErrorKind,
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Result,
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};
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pub struct QueryBuilder<'a> {
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query: String,
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values: BTreeMap<Variable, TypedValue>,
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types: BTreeMap<Variable, ValueType>,
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store: &'a mut Store,
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}
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impl<'a> QueryBuilder<'a> {
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2018-05-14 15:20:36 +00:00
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pub fn new<T>(store: &'a mut Store, query: T) -> QueryBuilder where T: Into<String> {
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QueryBuilder { query: query.into(), values: BTreeMap::new(), types: BTreeMap::new(), store }
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2018-04-05 10:09:13 +00:00
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}
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pub fn bind_value<T>(&mut self, var: &str, value: T) -> &mut Self where T: Into<TypedValue> {
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self.values.insert(Variable::from_valid_name(var), value.into());
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self
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}
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2018-05-11 16:52:17 +00:00
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pub fn bind_ref_from_kw(&mut self, var: &str, value: Keyword) -> Result<&mut Self> {
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let entid = self.store.conn().current_schema().get_entid(&value).ok_or(ErrorKind::UnknownAttribute(value.to_string()))?;
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self.values.insert(Variable::from_valid_name(var), TypedValue::Ref(entid.into()));
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Ok(self)
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}
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pub fn bind_ref<T>(&mut self, var: &str, value: T) -> &mut Self where T: Into<Entid> {
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self.values.insert(Variable::from_valid_name(var), TypedValue::Ref(value.into()));
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self
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}
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pub fn bind_long(&mut self, var: &str, value: i64) -> &mut Self {
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self.values.insert(Variable::from_valid_name(var), TypedValue::Long(value));
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self
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}
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pub fn bind_instant(&mut self, var: &str, value: i64) -> &mut Self {
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self.values.insert(Variable::from_valid_name(var), TypedValue::instant(value));
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self
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}
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pub fn bind_date_time(&mut self, var: &str, value: DateTime<Utc>) -> &mut Self {
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self.values.insert(Variable::from_valid_name(var), TypedValue::Instant(value));
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self
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}
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pub fn bind_type(&mut self, var: &str, value_type: ValueType) -> &mut Self {
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self.types.insert(Variable::from_valid_name(var), value_type);
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self
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}
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pub fn execute(&mut self) -> Result<QueryOutput> {
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let values = ::std::mem::replace(&mut self.values, Default::default());
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let types = ::std::mem::replace(&mut self.types, Default::default());
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let query_inputs = QueryInputs::new(types, values)?;
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let read = self.store.begin_read()?;
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read.q_once(&self.query, query_inputs)
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}
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2018-04-24 22:08:38 +00:00
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pub fn execute_scalar(&mut self) -> Result<Option<Binding>> {
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let results = self.execute()?;
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results.into_scalar().map_err(|e| e.into())
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}
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2018-04-24 22:08:38 +00:00
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pub fn execute_coll(&mut self) -> Result<Vec<Binding>> {
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let results = self.execute()?;
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results.into_coll().map_err(|e| e.into())
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}
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2018-04-24 22:08:38 +00:00
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pub fn execute_tuple(&mut self) -> Result<Option<Vec<Binding>>> {
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let results = self.execute()?;
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results.into_tuple().map_err(|e| e.into())
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}
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2018-04-24 22:08:38 +00:00
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pub fn execute_rel(&mut self) -> Result<RelResult<Binding>> {
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let results = self.execute()?;
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results.into_rel().map_err(|e| e.into())
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}
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}
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#[cfg(test)]
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mod test {
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use super::{
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QueryBuilder,
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TypedValue,
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Store,
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};
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#[test]
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fn test_scalar_query() {
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let mut store = Store::open("").expect("store connection");
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store.transact(r#"[
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[:db/add "s" :db/ident :foo/boolean]
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[:db/add "s" :db/valueType :db.type/boolean]
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[:db/add "s" :db/cardinality :db.cardinality/one]
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]"#).expect("successful transaction");
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let report = store.transact(r#"[
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[:db/add "u" :foo/boolean true]
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[:db/add "p" :foo/boolean false]
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]"#).expect("successful transaction");
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let yes = report.tempids.get("u").expect("found it").clone();
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let entid = QueryBuilder::new(&mut store, r#"[:find ?x .
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:in ?v
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:where [?x :foo/boolean ?v]]"#)
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.bind_value("?v", true)
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.execute_scalar().expect("ScalarResult")
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.map_or(None, |t| t.into_entid());
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assert_eq!(entid, Some(yes));
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}
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#[test]
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fn test_coll_query() {
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let mut store = Store::open("").expect("store connection");
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store.transact(r#"[
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[:db/add "s" :db/ident :foo/boolean]
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[:db/add "s" :db/valueType :db.type/boolean]
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[:db/add "s" :db/cardinality :db.cardinality/one]
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[:db/add "t" :db/ident :foo/long]
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[:db/add "t" :db/valueType :db.type/long]
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[:db/add "t" :db/cardinality :db.cardinality/one]
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]"#).expect("successful transaction");
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let report = store.transact(r#"[
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[:db/add "l" :foo/boolean true]
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[:db/add "l" :foo/long 25]
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[:db/add "m" :foo/boolean false]
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[:db/add "m" :foo/long 26]
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[:db/add "n" :foo/boolean true]
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[:db/add "n" :foo/long 27]
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[:db/add "p" :foo/boolean false]
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[:db/add "p" :foo/long 24]
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[:db/add "u" :foo/boolean true]
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[:db/add "u" :foo/long 23]
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]"#).expect("successful transaction");
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let u_yes = report.tempids.get("u").expect("found it").clone();
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let l_yes = report.tempids.get("l").expect("found it").clone();
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let n_yes = report.tempids.get("n").expect("found it").clone();
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let entids: Vec<i64> = QueryBuilder::new(&mut store, r#"[:find [?x ...]
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:in ?v
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:where [?x :foo/boolean ?v]]"#)
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.bind_value("?v", true)
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.execute_coll().expect("CollResult")
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.into_iter()
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.map(|v| v.into_entid().expect("val"))
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.collect();
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assert_eq!(entids, vec![l_yes, n_yes, u_yes]);
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}
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#[test]
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fn test_coll_query_by_row() {
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let mut store = Store::open("").expect("store connection");
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store.transact(r#"[
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[:db/add "s" :db/ident :foo/boolean]
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[:db/add "s" :db/valueType :db.type/boolean]
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[:db/add "s" :db/cardinality :db.cardinality/one]
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[:db/add "t" :db/ident :foo/long]
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[:db/add "t" :db/valueType :db.type/long]
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[:db/add "t" :db/cardinality :db.cardinality/one]
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]"#).expect("successful transaction");
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let report = store.transact(r#"[
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[:db/add "l" :foo/boolean true]
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[:db/add "l" :foo/long 25]
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[:db/add "m" :foo/boolean false]
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[:db/add "m" :foo/long 26]
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[:db/add "n" :foo/boolean true]
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[:db/add "n" :foo/long 27]
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[:db/add "p" :foo/boolean false]
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[:db/add "p" :foo/long 24]
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[:db/add "u" :foo/boolean true]
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[:db/add "u" :foo/long 23]
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]"#).expect("successful transaction");
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let n_yes = report.tempids.get("n").expect("found it").clone();
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let results = QueryBuilder::new(&mut store, r#"[:find [?x ...]
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2018-04-06 09:02:42 +00:00
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:in ?v
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:where [?x :foo/boolean ?v]]"#)
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2018-04-05 10:09:13 +00:00
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.bind_value("?v", true)
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.execute_coll().expect("CollResult");
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let entid = results.get(1).map_or(None, |t| t.to_owned().into_entid()).expect("entid");
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assert_eq!(entid, n_yes);
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}
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#[test]
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fn test_tuple_query_result_by_column() {
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let mut store = Store::open("").expect("store connection");
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store.transact(r#"[
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[:db/add "s" :db/ident :foo/boolean]
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[:db/add "s" :db/valueType :db.type/boolean]
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[:db/add "s" :db/cardinality :db.cardinality/one]
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[:db/add "t" :db/ident :foo/long]
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[:db/add "t" :db/valueType :db.type/long]
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[:db/add "t" :db/cardinality :db.cardinality/one]
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]"#).expect("successful transaction");
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let report = store.transact(r#"[
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[:db/add "l" :foo/boolean true]
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[:db/add "l" :foo/long 25]
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[:db/add "m" :foo/boolean false]
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[:db/add "m" :foo/long 26]
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[:db/add "n" :foo/boolean true]
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[:db/add "n" :foo/long 27]
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[:db/add "p" :foo/boolean false]
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[:db/add "p" :foo/long 24]
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[:db/add "u" :foo/boolean true]
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[:db/add "u" :foo/long 23]
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]"#).expect("successful transaction");
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let n_yes = report.tempids.get("n").expect("found it").clone();
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let results = QueryBuilder::new(&mut store, r#"[:find [?x, ?i]
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2018-04-06 09:02:42 +00:00
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:in ?v ?i
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:where [?x :foo/boolean ?v]
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[?x :foo/long ?i]]"#)
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2018-04-05 10:09:13 +00:00
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.bind_value("?v", true)
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.bind_long("?i", 27)
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.execute_tuple().expect("TupleResult").expect("Vec<TypedValue>");
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let entid = results.get(0).map_or(None, |t| t.to_owned().into_entid()).expect("entid");
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let long_val = results.get(1).map_or(None, |t| t.to_owned().into_long()).expect("long");
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assert_eq!(entid, n_yes);
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assert_eq!(long_val, 27);
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}
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#[test]
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fn test_tuple_query_result_by_iter() {
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let mut store = Store::open("").expect("store connection");
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store.transact(r#"[
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[:db/add "s" :db/ident :foo/boolean]
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[:db/add "s" :db/valueType :db.type/boolean]
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[:db/add "s" :db/cardinality :db.cardinality/one]
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[:db/add "t" :db/ident :foo/long]
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[:db/add "t" :db/valueType :db.type/long]
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[:db/add "t" :db/cardinality :db.cardinality/one]
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]"#).expect("successful transaction");
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let report = store.transact(r#"[
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[:db/add "l" :foo/boolean true]
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[:db/add "l" :foo/long 25]
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[:db/add "m" :foo/boolean false]
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[:db/add "m" :foo/long 26]
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[:db/add "n" :foo/boolean true]
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[:db/add "n" :foo/long 27]
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[:db/add "p" :foo/boolean false]
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[:db/add "p" :foo/long 24]
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[:db/add "u" :foo/boolean true]
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[:db/add "u" :foo/long 23]
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]"#).expect("successful transaction");
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let n_yes = report.tempids.get("n").expect("found it").clone();
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2018-04-24 22:08:38 +00:00
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let results: Vec<_> = QueryBuilder::new(&mut store, r#"[:find [?x, ?i]
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:in ?v ?i
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:where [?x :foo/boolean ?v]
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[?x :foo/long ?i]]"#)
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2018-04-05 10:09:13 +00:00
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.bind_value("?v", true)
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.bind_long("?i", 27)
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.execute_tuple().expect("TupleResult").unwrap_or(vec![]);
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2018-04-24 22:08:38 +00:00
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let entid = TypedValue::Ref(n_yes.clone()).into();
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let long_val = TypedValue::Long(27).into();
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2018-04-05 10:09:13 +00:00
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assert_eq!(results, vec![entid, long_val]);
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}
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#[test]
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fn test_rel_query_result() {
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let mut store = Store::open("").expect("store connection");
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store.transact(r#"[
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|
|
[:db/add "s" :db/ident :foo/boolean]
|
|
|
|
[:db/add "s" :db/valueType :db.type/boolean]
|
|
|
|
[:db/add "s" :db/cardinality :db.cardinality/one]
|
|
|
|
[:db/add "t" :db/ident :foo/long]
|
|
|
|
[:db/add "t" :db/valueType :db.type/long]
|
|
|
|
[:db/add "t" :db/cardinality :db.cardinality/one]
|
|
|
|
]"#).expect("successful transaction");
|
|
|
|
|
|
|
|
let report = store.transact(r#"[
|
|
|
|
[:db/add "l" :foo/boolean true]
|
|
|
|
[:db/add "l" :foo/long 25]
|
|
|
|
[:db/add "m" :foo/boolean false]
|
|
|
|
[:db/add "m" :foo/long 26]
|
|
|
|
[:db/add "n" :foo/boolean true]
|
|
|
|
[:db/add "n" :foo/long 27]
|
|
|
|
]"#).expect("successful transaction");
|
|
|
|
|
|
|
|
let l_yes = report.tempids.get("l").expect("found it").clone();
|
|
|
|
let m_yes = report.tempids.get("m").expect("found it").clone();
|
|
|
|
let n_yes = report.tempids.get("n").expect("found it").clone();
|
|
|
|
|
|
|
|
#[derive(Debug, PartialEq)]
|
|
|
|
struct Res {
|
|
|
|
entid: i64,
|
|
|
|
boolean: bool,
|
|
|
|
long_val: i64,
|
|
|
|
};
|
|
|
|
|
|
|
|
let mut results: Vec<Res> = QueryBuilder::new(&mut store, r#"[:find ?x ?v ?i
|
2018-04-06 09:02:42 +00:00
|
|
|
:where [?x :foo/boolean ?v]
|
|
|
|
[?x :foo/long ?i]]"#)
|
2018-04-05 10:09:13 +00:00
|
|
|
.execute_rel().expect("RelResult")
|
|
|
|
.into_iter()
|
|
|
|
.map(|row| {
|
|
|
|
Res {
|
|
|
|
entid: row.get(0).map_or(None, |t| t.to_owned().into_entid()).expect("entid"),
|
|
|
|
boolean: row.get(1).map_or(None, |t| t.to_owned().into_boolean()).expect("boolean"),
|
|
|
|
long_val: row.get(2).map_or(None, |t| t.to_owned().into_long()).expect("long"),
|
|
|
|
}
|
|
|
|
})
|
|
|
|
.collect();
|
|
|
|
|
|
|
|
let res1 = results.pop().expect("res");
|
|
|
|
assert_eq!(res1, Res { entid: n_yes, boolean: true, long_val: 27 });
|
|
|
|
let res2 = results.pop().expect("res");
|
|
|
|
assert_eq!(res2, Res { entid: m_yes, boolean: false, long_val: 26 });
|
|
|
|
let res3 = results.pop().expect("res");
|
|
|
|
assert_eq!(res3, Res { entid: l_yes, boolean: true, long_val: 25 });
|
|
|
|
assert_eq!(results.pop(), None);
|
|
|
|
}
|
|
|
|
|
|
|
|
#[test]
|
|
|
|
fn test_bind_ref() {
|
|
|
|
let mut store = Store::open("").expect("store connection");
|
|
|
|
store.transact(r#"[
|
|
|
|
[:db/add "s" :db/ident :foo/boolean]
|
|
|
|
[:db/add "s" :db/valueType :db.type/boolean]
|
|
|
|
[:db/add "s" :db/cardinality :db.cardinality/one]
|
|
|
|
[:db/add "t" :db/ident :foo/long]
|
|
|
|
[:db/add "t" :db/valueType :db.type/long]
|
|
|
|
[:db/add "t" :db/cardinality :db.cardinality/one]
|
|
|
|
]"#).expect("successful transaction");
|
|
|
|
|
|
|
|
let report = store.transact(r#"[
|
|
|
|
[:db/add "l" :foo/boolean true]
|
|
|
|
[:db/add "l" :foo/long 25]
|
|
|
|
[:db/add "m" :foo/boolean false]
|
|
|
|
[:db/add "m" :foo/long 26]
|
|
|
|
[:db/add "n" :foo/boolean true]
|
|
|
|
[:db/add "n" :foo/long 27]
|
|
|
|
]"#).expect("successful transaction");
|
|
|
|
|
|
|
|
let l_yes = report.tempids.get("l").expect("found it").clone();
|
|
|
|
|
|
|
|
let results = QueryBuilder::new(&mut store, r#"[:find [?v ?i]
|
2018-04-06 09:02:42 +00:00
|
|
|
:in ?x
|
|
|
|
:where [?x :foo/boolean ?v]
|
|
|
|
[?x :foo/long ?i]]"#)
|
2018-04-05 10:09:13 +00:00
|
|
|
.bind_ref("?x", l_yes)
|
|
|
|
.execute_tuple().expect("TupleResult")
|
|
|
|
.unwrap_or(vec![]);
|
|
|
|
assert_eq!(results.get(0).map_or(None, |t| t.to_owned().into_boolean()).expect("boolean"), true);
|
|
|
|
assert_eq!(results.get(1).map_or(None, |t| t.to_owned().into_long()).expect("long"), 25);
|
|
|
|
}
|
|
|
|
}
|