Goal Find partial or case insensitive unique indexes. These implement uniqueness constraints that are impossible to enforce with the help of SQL's regular UNIQUE constraint.
Notes The query uses a system view and returns CREATE INDEX statements.
Type General (Overview of some aspect of the database.)
License MIT (opens in new tab)
Data Source INFORMATION_SCHEMA+system catalog
SQL Query 
SELECT schemaname, tablename, indexname, indexdef
FROM pg_catalog.pg_indexes
WHERE indexdef LIKE 'CREATE UNIQUE INDEX%' AND 
(indexdef LIKE '% WHERE %' OR
indexdef LIKE '%(upper(%' OR
indexdef LIKE '%(lower(%') AND
schemaname NOT IN (SELECT schema_name
FROM INFORMATION_SCHEMA.schemata
WHERE schema_name<>'public' AND
schema_owner='postgres' AND schema_name IS NOT NULL)
ORDER BY schemaname, tablename, indexname;

Collections

This query belongs to the following collections:

Find problems by overview

Queries that results point to different aspects of database that might have problems. A human reviewer has to decide based on the results as to whether there are problems or not .

NameDescription
Find problems by overviewQueries that results point to different aspects of database that might have problems. A human reviewer has to decide based on the results as to whether there are problems or not .

Categories

This query is classified under the following categories:

Case sensitivity vs. case insensitivity

Queries of this category provide information about case sensitivity/insensitivity of identifiers or user data.

Performance

Queries of this category provide information about indexes in a database.

Uniqueness

Queries of this category provide information about uniqueness constraints (PRIMARY KEY, UNIQUE, EXCLUDE) as well as unique indexes.

Validity and completeness

Queries of this category provide information about whether database design represents the world (domain) correctly (validity) and whether database design captures all the information about the world (domain) that is correct and relevant (completeness).

NameDescription
Case sensitivity vs. case insensitivityQueries of this category provide information about case sensitivity/insensitivity of identifiers or user data.
PerformanceQueries of this category provide information about indexes in a database.
UniquenessQueries of this category provide information about uniqueness constraints (PRIMARY KEY, UNIQUE, EXCLUDE) as well as unique indexes.
Validity and completenessQueries of this category provide information about whether database design represents the world (domain) correctly (validity) and whether database design captures all the information about the world (domain) that is correct and relevant (completeness).