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fix(database): cast extract(epoch)::double precision in active-connections query

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extract(epoch FROM now() - query_start) returns numeric (decimal) in
PostgreSQL, but the result was read as f64 via r.get(4). tokio-postgres
has no FromSql<f64> impl for the numeric type, so get_db_status panicked
at runtime with 'error deserializing column 4' (HTTP 500).

Cast to ::double precision (float8) to match query_duration_secs: Option<f64>.

Audited the remaining column mappings in status.rs to rule out further
type mismatches — all sound: reltuples::bigint->i64, native bigint size
columns->i64, last_vacuum/last_analyze timestamptz->DateTime<Utc>
(chrono feature enabled), schema_migrations.version TEXT->String,
count(*)::int->i32 (fixed previously).
This commit is contained in:
xfy 2026-06-30 13:51:48 +08:00
parent 116286f80f
commit 36168f26d7
1 changed files with 4 additions and 2 deletions
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6
src/api/database/status.rs
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@ -173,11 +173,13 @@ pub async fn get_db_status() -> Result<DbStatus, ServerFnError> {
}) })
.collect(); .collect();
// 活跃连接（过滤自身 pid，避免循环显示） // 活跃连接（过滤自身 pid，避免循环显示）。
// extract(epoch FROM ...) 原生返回 numeric(decimal)，tokio-postgres 无 FromSql<f64>
// 实现该类型；显式 ::double precision 转 float8 以匹配 query_duration_secs 的 f64。
let conn_rows = client let conn_rows = client
.query( .query(
"SELECT pid, usename, state, query, \ "SELECT pid, usename, state, query, \
extract(epoch FROM now() - query_start) \ extract(epoch FROM now() - query_start)::double precision \
FROM pg_stat_activity \ FROM pg_stat_activity \
WHERE datname = current_database() AND pid <> pg_backend_pid() \ WHERE datname = current_database() AND pid <> pg_backend_pid() \
ORDER BY query_start DESC NULLS LAST LIMIT 50", ORDER BY query_start DESC NULLS LAST LIMIT 50",