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improvement: log index names used

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This commit is contained in:
Greg Heartsfield 2023-01-06 12:39:40 -06:00
parent 66a55b55b9
commit 807d1aa384
1 changed files with 15 additions and 10 deletions
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25
src/db.rs
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@ -517,8 +517,8 @@ fn override_index(f: &ReqFilter) -> Option<String> {
None
}
/// Create a dynamic SQL subquery and params from a subscription filter.
fn query_from_filter(f: &ReqFilter) -> (String, Vec<Box<dyn ToSql>>) {
/// Create a dynamic SQL subquery and params from a subscription filter (and optional explicit index used)
fn query_from_filter(f: &ReqFilter) -> (String, Vec<Box<dyn ToSql>>, Option<String>) {
// build a dynamic SQL query. all user-input is either an integer
// (sqli-safe), or a string that is filtered to only contain
// hexadecimal characters. Strings that require escaping (tag
@ -535,7 +535,7 @@ fn query_from_filter(f: &ReqFilter) -> (String, Vec<Box<dyn ToSql>>) {
// check if the index needs to be overriden
let idx_name = override_index(&f);
if let Some(n) = &idx_name {
info!("using explicit index: {:?}", n);
debug!("using explicit index: {:?}", n);
}
let idx_stmt = idx_name.map_or_else(|| "".to_owned(), |i| format!("INDEXED BY {}",i));
let mut query = format!("SELECT e.content, e.created_at FROM event e {}", idx_stmt);
@ -672,19 +672,23 @@ fn query_from_filter(f: &ReqFilter) -> (String, Vec<Box<dyn ToSql>>) {
} else {
query.push_str(" ORDER BY e.created_at ASC")
}
(query, params)
(query, params, idx_name)
}
/// Create a dynamic SQL query string and params from a subscription.
fn query_from_sub(sub: &Subscription) -> (String, Vec<Box<dyn ToSql>>) {
fn query_from_sub(sub: &Subscription) -> (String, Vec<Box<dyn ToSql>>, Vec<String>) {
// build a dynamic SQL query for an entire subscription, based on
// SQL subqueries for filters.
let mut subqueries: Vec<String> = Vec::new();
let indexes = vec![];
// subquery params
let mut params: Vec<Box<dyn ToSql>> = vec![];
// for every filter in the subscription, generate a subquery
for f in sub.filters.iter() {
let (f_subquery, mut f_params) = query_from_filter(f);
let (f_subquery, mut f_params, index) = query_from_filter(f);
if let Some(i) = index {
indexes.push(i);
}
subqueries.push(f_subquery);
params.append(&mut f_params);
}
@ -694,7 +698,7 @@ fn query_from_sub(sub: &Subscription) -> (String, Vec<Box<dyn ToSql>>) {
.map(|s| format!("SELECT distinct content, created_at FROM ({})", s))
.collect();
let query: String = subqueries_selects.join(" UNION ");
(query, params)
(query, params,indexes)
}
/// Check if the pool is fully utilized
@ -814,8 +818,9 @@ pub async fn db_query(
let start = Instant::now();
let mut row_count: usize = 0;
// generate SQL query
let (q, p) = query_from_sub(&sub);
let (q, p, idxs) = query_from_sub(&sub);
let sql_gen_elapsed = start.elapsed();
if sql_gen_elapsed > Duration::from_millis(10) {
debug!("SQL (slow) generated in {:?}", start.elapsed());
}
@ -840,8 +845,8 @@ pub async fn db_query(
slow_first_event = first_event_elapsed >= slow_cutoff;
if first_result {
debug!(
"first result in {:?} (cid: {}, sub: {:?})",
first_event_elapsed, client_id, sub.id
"first result in {:?} (cid: {}, sub: {:?}) [used indexes: {:?}]",
first_event_elapsed, client_id, sub.id, idxs
);
first_result = false;
}