[Metricbeat][Postgresql][Database] Fix fields not being parsed correctly (#37720)

* change blk_read_time and blk_write_time from long to double type

* add changelog entry

* remove unnecessary changes

Author: kush-elastic

CHANGELOG.next.asciidoc

@@ -109,6 +109,7 @@ fields added to events containing the Beats version. {pull}37553[37553]
 
 *Metricbeat*
 
+- Fix fields not being parsed correctly in postgresql/database {issue}25301[25301] {pull}37720[37720]
 
 *Osquerybeat*
 

metricbeat/docs/fields.asciidoc

@@ -56448,7 +56448,7 @@ type: long
 Time spent reading data file blocks by backends in this database, in milliseconds.
 
 
-type: long
+type: double
 
 --
 
@@ -56458,7 +56458,7 @@ type: long
 Time spent writing data file blocks by backends in this database, in milliseconds.
 
 
-type: long
+type: double
 
 --
 

metricbeat/module/postgresql/database/_meta/fields.yml

@@ -36,12 +36,12 @@
         that a read was not necessary (this only includes hits in the PostgreSQL
         buffer cache, not the operating system's file system cache).
     - name: blocks.time.read.ms
-      type: long
+      type: double
       description: >
         Time spent reading data file blocks by backends in this database, in
         milliseconds.
     - name: blocks.time.write.ms
-      type: long
+      type: double
       description: >
         Time spent writing data file blocks by backends in this database, in
         milliseconds.

metricbeat/module/postgresql/database/data.go

@@ -37,8 +37,8 @@ var schema = s.Schema{
 		"read": c.Int("blks_read"),
 		"hit":  c.Int("blks_hit"),
 		"time": s.Object{
-			"read":  s.Object{"ms": c.Int("blk_read_time")},
-			"write": s.Object{"ms": c.Int("blk_write_time")},
+			"read":  s.Object{"ms": c.Float("blk_read_time")},
+			"write": s.Object{"ms": c.Float("blk_write_time")},
 		},
 	},
 	"rows": s.Object{