Added explicit definition of si alias in metrics related to indexes

Author: dementii-priadko

config/pgwatch-prometheus/metrics.yml

@@ -1465,7 +1465,7 @@ metrics:
           join pg_class cr on cr.oid = i.indrelid and cr.relkind = 'r'
           join pg_namespace n on n.oid = ci.relnamespace
           join pg_constraint cn on cn.conrelid = cr.oid
-          left join pg_stat_user_indexes si on si.indexrelid = i.indexrelid
+          left join pg_stat_user_indexes as si on si.indexrelid = i.indexrelid
           where
             contype = 'f'
             and i.indisunique is false
@@ -1620,7 +1620,7 @@ metrics:
           join pg_class cr on cr.oid = i.indrelid and cr.relkind = 'r'
           join pg_namespace n on n.oid = ci.relnamespace
           join pg_constraint cn on cn.conrelid = cr.oid
-          left join pg_stat_user_indexes si on si.indexrelid = i.indexrelid
+          left join pg_stat_user_indexes as si on si.indexrelid = i.indexrelid
           where
             contype = 'f'
             and i.indisunique is false
@@ -1653,7 +1653,7 @@ metrics:
             join pg_class cr on cr.oid = i.indrelid and cr.relkind = 'r'
             join pg_namespace n on n.oid = ci.relnamespace
             join pg_am a ON ci.relam = a.oid
-            left join pg_stat_user_indexes si on si.indexrelid = i.indexrelid
+            left join pg_stat_user_indexes as si on si.indexrelid = i.indexrelid
           where
             i.indisunique = false
             and i.indisvalid = true
@@ -1732,7 +1732,7 @@ metrics:
           join pg_class cr on cr.oid = i.indrelid and cr.relkind = 'r'
           join pg_namespace n on n.oid = ci.relnamespace
           join pg_constraint cn on cn.conrelid = cr.oid
-          left join pg_stat_user_indexes si on si.indexrelid = i.indexrelid
+          left join pg_stat_user_indexes as si on si.indexrelid = i.indexrelid
           where
             contype = 'f'
             and i.indisunique is false
@@ -1767,7 +1767,7 @@ metrics:
             join pg_class cr on cr.oid = i.indrelid and cr.relkind = 'r'
             join pg_namespace n on n.oid = ci.relnamespace
             join pg_am a ON ci.relam = a.oid
-            left join pg_stat_user_indexes si on si.indexrelid = i.indexrelid
+            left join pg_stat_user_indexes as si on si.indexrelid = i.indexrelid
           where
             i.indisunique = false
             and i.indisvalid = true