The list of all the queries

FOR UPDATE in derived tables

Query goal: Find derived tables that subquery uses FOR UPDATE construct. Reading a data element shouldn't block other read operations of the same element. Thus, you shouldn't use exclusive locking command in a view.
Notes about the query: In the returned subquery of view/materialized view the query replaces each newline character with the line break (br) tag for the better readability in case the query result is displayed in a web browser.
Query type: Problem detection (Each row in the result could represent a flaw in the design)
Query reliability: High (Few or no false-positive results)
Query license: MIT License
Fixing suggestion: Drop the view and recreate it without using FOR UPDATE in the subquery.
Data source: INFORMATION_SCHEMA+system catalog
SQL query: Click on query to copy it

SELECT
table_schema,
table_name,
type,
view_definition
FROM (SELECT 
views.table_schema, 
views.table_name, 
'VIEW' AS type,
views.view_definition
FROM 
information_schema.views
WHERE table_schema NOT IN (SELECT schema_name
FROM INFORMATION_SCHEMA.schemata
WHERE schema_name<>'public' AND
schema_owner='postgres' AND schema_name IS NOT NULL)
UNION SELECT schemaname, matviewname, 'MATERIALIZED VIEW' AS type, regexp_replace(definition,'[\r\n]','<br>','g') AS definition
FROM pg_catalog.pg_matviews) AS foo
WHERE view_definition ~*'[[:space:]]+for[[:space:]]+update'
ORDER BY table_schema, table_name;

SQL statements for generating SQL statements that help us to fix the problem

SQL queryDescription
SELECT format('DROP VIEW %1$I.%2$I;', views.table_schema, views.table_name) AS statements
FROM information_schema.views
WHERE table_schema NOT IN (SELECT schema_name
FROM INFORMATION_SCHEMA.schemata
WHERE schema_name<>'public' AND
schema_owner='postgres' AND schema_name IS NOT NULL)
AND view_definition ~*'^.+[[:space:]]+for[[:space:]]+update.*$'
ORDER BY table_schema, table_name;
Drop the view.
SELECT format('DROP MATERIALIZED VIEW %1$I.%2$I;', schemaname, matviewname) AS statements
FROM pg_catalog.pg_matviews
WHERE definition ~*'^.+[[:space:]]+for[[:space:]]+update.*$'
ORDER BY schemaname, matviewname;
Drop the materialized view.

Collections where the query belongs to

Collection nameCollection description
Find problems automaticallyQueries, that results point to problems in the database. Each query in the collection produces an initial assessment. However, a human reviewer has the final say as to whether there is a problem or not .

Categories where the query belongs to

Category nameCategory description
Concurrency controlQueries of this category provide information about concurrency control.
Derived tablesQueries of this category provide information about the derived tables (views, materialized views), which are used to implement virtual data layer.
PerformanceQueries of this category provide information about indexes in a database.

Reference materials for further reading

Reference
https://devcenter.heroku.com/articles/postgresql-concurrency
https://dba.stackexchange.com/questions/189240/how-does-select-for-update-behave-with-views-in-postgresql

The list of all the queries