From 4b1397d61f8615add1eb42d132102c123d3bb19c Mon Sep 17 00:00:00 2001
From: Nikolai Vaganov <electron17@yandex.ru>
Date: Mon, 23 Sep 2024 23:18:25 +0300
Subject: [PATCH] fix converting NULL to uint64 is unsupported in size table
Signed-off-by: Nikolai Vaganov <electron17@yandex.ru>
---
collector/pg_wal.go | 25 ++++++++++++++++++++-----
1 file changed, 20 insertions(+), 5 deletions(-)
diff --git a/collector/pg_wal.go b/collector/pg_wal.go
index afa8fcef..4cbb1793 100644
--- a/collector/pg_wal.go
+++ b/collector/pg_wal.go
@@ -15,7 +15,7 @@ package collector
import (
"context"
-
+ "database/sql"
"github.com/prometheus/client_golang/prometheus"
)
@@ -66,19 +66,34 @@ func (c PGWALCollector) Update(ctx context.Context, instance *instance, ch chan<
pgWALQuery,
)
- var segments uint64
- var size uint64
+ var segments sql.NullInt64
+ var size sql.NullInt64
err := row.Scan(&segments, &size)
if err != nil {
return err
}
+
+ var segmentsValue float64
+ if segments.Valid {
+ segmentsValue = float64(segments.Int64)
+ } else {
+ segmentsValue = 0
+ }
+
+ var sizeValue float64
+ if size.Valid {
+ sizeValue = float64(size.Int64)
+ } else {
+ sizeValue = 0
+ }
+
ch <- prometheus.MustNewConstMetric(
pgWALSegments,
- prometheus.GaugeValue, float64(segments),
+ prometheus.GaugeValue, segmentsValue,
)
ch <- prometheus.MustNewConstMetric(
pgWALSize,
- prometheus.GaugeValue, float64(size),
+ prometheus.GaugeValue, sizeValue,
)
return nil
}