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NikolaySNikolayS
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Merge pull request #35 from NikolayS/i3_fix
i3: Reformat SQL and fix collision with intarray #25
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‎sql/i3_non_indexed_fks.sql

+114-116
Original file line numberDiff line numberDiff line change
@@ -6,121 +6,119 @@
66
-- on the referencing side
77
-- or a bad index
88

9-
WITH fk_actions ( code, action ) AS (
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VALUES ( 'a', 'error' ),
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( 'r', 'restrict' ),
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( 'c', 'cascade' ),
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( 'n', 'set null' ),
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( 'd', 'set default' )
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),
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fk_list AS (
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SELECT pg_constraint.oid as fkoid, conrelid, confrelid as parentid,
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conname, relname, nspname,
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fk_actions_update.action as update_action,
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fk_actions_delete.action as delete_action,
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conkey as key_cols
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FROM pg_constraint
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JOIN pg_class ON conrelid = pg_class.oid
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JOIN pg_namespace ON pg_class.relnamespace = pg_namespace.oid
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JOIN fk_actions AS fk_actions_update ON confupdtype = fk_actions_update.code
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JOIN fk_actions AS fk_actions_delete ON confdeltype = fk_actions_delete.code
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WHERE contype = 'f'
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),
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fk_attributes AS (
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SELECT fkoid, conrelid, attname, attnum
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FROM fk_list
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JOIN pg_attribute
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ON conrelid = attrelid
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AND attnum = ANY( key_cols )
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ORDER BY fkoid, attnum
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),
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fk_cols_list AS (
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SELECT fkoid, array_agg(attname) as cols_list
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FROM fk_attributes
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GROUP BY fkoid
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),
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index_list AS (
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SELECT indexrelid as indexid,
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pg_class.relname as indexname,
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indrelid,
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indkey,
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indpred is not null as has_predicate,
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pg_get_indexdef(indexrelid) as indexdef
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FROM pg_index
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JOIN pg_class ON indexrelid = pg_class.oid
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WHERE indisvalid
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),
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fk_index_match AS (
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SELECT fk_list.*,
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indexid,
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indexname,
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indkey::int[] as indexatts,
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has_predicate,
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indexdef,
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array_length(key_cols, 1) as fk_colcount,
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array_length(indkey,1) as index_colcount,
62-
round(pg_relation_size(conrelid)/(1024^2)::numeric) as table_mb,
63-
cols_list
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FROM fk_list
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JOIN fk_cols_list USING (fkoid)
66-
LEFT OUTER JOIN index_list
67-
ON conrelid = indrelid
68-
AND (indkey::int2[])[0:(array_length(key_cols,1) -1)] @> key_cols
9+
with fk_actions ( code, action ) as (
10+
values ('a', 'error'),
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('r', 'restrict'),
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('c', 'cascade'),
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('n', 'set null'),
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('d', 'set default')
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), fk_list as (
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select
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pg_constraint.oid as fkoid, conrelid, confrelid as parentid,
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conname,
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relname,
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nspname,
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fk_actions_update.action as update_action,
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fk_actions_delete.action as delete_action,
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conkey as key_cols
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from pg_constraint
25+
join pg_class on conrelid = pg_class.oid
26+
join pg_namespace on pg_class.relnamespace = pg_namespace.oid
27+
join fk_actions as fk_actions_update on confupdtype = fk_actions_update.code
28+
join fk_actions as fk_actions_delete on confdeltype = fk_actions_delete.code
29+
where contype = 'f'
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), fk_attributes as (
31+
select fkoid, conrelid, attname, attnum
32+
from fk_list
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join pg_attribute on conrelid = attrelid and attnum = any(key_cols)
34+
order by fkoid, attnum
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), fk_cols_list as (
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select fkoid, array_agg(attname) as cols_list
37+
from fk_attributes
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group by fkoid
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), index_list as (
40+
select
41+
indexrelid as indexid,
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pg_class.relname as indexname,
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indrelid,
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indkey,
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indpred is not null as has_predicate,
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pg_get_indexdef(indexrelid) as indexdef
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from pg_index
48+
join pg_class on indexrelid = pg_class.oid
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where indisvalid
50+
), fk_index_match as (
51+
select
52+
fk_list.*,
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indexid,
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indexname,
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indkey::int[] as indexatts,
56+
has_predicate,
57+
indexdef,
58+
array_length(key_cols, 1) as fk_colcount,
59+
array_length(indkey,1) as index_colcount,
60+
round(pg_relation_size(conrelid)/(1024^2)::numeric) as table_mb,
61+
cols_list
62+
from fk_list
63+
join fk_cols_list using (fkoid)
64+
left join index_list on
65+
conrelid = indrelid
66+
and (indkey::int2[])[0:(array_length(key_cols,1) -1)] operator(pg_catalog.@>) key_cols
6967

70-
),
71-
fk_perfect_match AS (
72-
SELECT fkoid
73-
FROM fk_index_match
74-
WHERE (index_colcount - 1) <= fk_colcount
75-
AND NOT has_predicate
76-
AND indexdef LIKE '%USING btree%'
77-
),
78-
fk_index_check AS (
79-
SELECT 'no index' as issue, *, 1 as issue_sort
80-
FROM fk_index_match
81-
WHERE indexid IS NULL
82-
UNION ALL
83-
SELECT 'questionable index' as issue, *, 2
84-
FROM fk_index_match
85-
WHERE indexid IS NOT NULL
86-
AND fkoid NOT IN (
87-
SELECT fkoid
88-
FROM fk_perfect_match)
89-
),
90-
parent_table_stats AS (
91-
SELECT fkoid, tabstats.relname as parent_name,
92-
(n_tup_ins + n_tup_upd + n_tup_del + n_tup_hot_upd) as parent_writes,
93-
round(pg_relation_size(parentid)/(1024^2)::numeric) as parent_mb
94-
FROM pg_stat_user_tables AS tabstats
95-
JOIN fk_list
96-
ON relid = parentid
97-
),
98-
fk_table_stats AS (
99-
SELECT fkoid,
100-
(n_tup_ins + n_tup_upd + n_tup_del + n_tup_hot_upd) as writes,
101-
seq_scan as table_scans
102-
FROM pg_stat_user_tables AS tabstats
103-
JOIN fk_list
104-
ON relid = conrelid
68+
), fk_perfect_match as (
69+
select fkoid
70+
from fk_index_match
71+
where
72+
(index_colcount - 1) <= fk_colcount
73+
and not has_predicate
74+
and indexdef like '%USING btree%'
75+
), fk_index_check as (
76+
select 'no index' as issue, *, 1 as issue_sort
77+
from fk_index_match
78+
where indexid is null
79+
union all
80+
select 'questionable index' as issue, *, 2
81+
from fk_index_match
82+
where
83+
indexid is not null
84+
and fkoid not in (select fkoid from fk_perfect_match)
85+
), parent_table_stats as (
86+
select
87+
fkoid,
88+
tabstats.relname as parent_name,
89+
(n_tup_ins + n_tup_upd + n_tup_del + n_tup_hot_upd) as parent_writes,
90+
round(pg_relation_size(parentid)/(1024^2)::numeric) as parent_mb
91+
from pg_stat_user_tables as tabstats
92+
join fk_list on relid = parentid
93+
), fk_table_stats as (
94+
select
95+
fkoid,
96+
(n_tup_ins + n_tup_upd + n_tup_del + n_tup_hot_upd) as writes,
97+
seq_scan as table_scans
98+
from pg_stat_user_tables as tabstats
99+
join fk_list on relid = conrelid
105100
)
106-
SELECT nspname as schema_name,
107-
relname as table_name,
108-
conname as fk_name,
109-
issue,
110-
table_mb,
111-
writes,
112-
table_scans,
113-
parent_name,
114-
parent_mb,
115-
parent_writes,
116-
cols_list,
117-
indexdef
118-
FROM fk_index_check
119-
JOIN parent_table_stats USING (fkoid)
120-
JOIN fk_table_stats USING (fkoid)
121-
WHERE table_mb > 9
122-
AND ( writes > 1000
123-
OR parent_writes > 1000
124-
OR parent_mb > 10 )
125-
ORDER BY issue_sort, table_mb DESC, table_name, fk_name;
126-
101+
select
102+
nspname as schema_name,
103+
relname as table_name,
104+
conname as fk_name,
105+
issue,
106+
table_mb,
107+
writes,
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table_scans,
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parent_name,
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parent_mb,
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parent_writes,
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cols_list,
113+
indexdef
114+
from fk_index_check
115+
join parent_table_stats using (fkoid)
116+
join fk_table_stats using (fkoid)
117+
where
118+
table_mb > 9
119+
and (
120+
writes > 1000
121+
or parent_writes > 1000
122+
or parent_mb > 10
123+
)
124+
order by issue_sort, table_mb desc, table_name, fk_name;

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