Why does PostgreSQL perform sequential scan on indexed column?

Why does PostgreSQL perform sequential scan on indexed column?

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postgresql

How to reset sequence in postgres and fill id column with new data?

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postgresql

Postgresql - Using subqueries with alter sequence expressions

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postgresql

Sequence does not reset after truncating the table

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postgresql

PostgreSQL gapless sequences

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postgresql

PostgreSQL next value of the sequences?

codeigniter postgresql sequence postgresql-9.1 nextval

postgresql

Mapping PostgreSQL serial type with Hibernate annotations

hibernate postgresql sequence auto-increment

postgresql

Specifying distinct sequence per table in Hibernate on subclasses

java hibernate postgresql sequence

postgresql

Deleting a table in PostgreSQL without deleting an associated sequence

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postgresql

Hibernate schema parameter doesn't work in @SequenceGenerator annotation

hibernate postgresql schema sequence jpa-2.0

postgresql

PHP Postgres: Get Last Insert ID

php sql postgresql sequence last-insert-id

postgresql

Doctrine2 doesn't set sequence to default for id column (postgres)

php postgresql sequence doctrine-orm

postgresql

Manual inserts on a postgres table with a primary key sequence

postgresql primary-key sequence

postgresql

SQL: Select a list of numbers from "nothing"

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postgresql

In-order sequence generation

postgresql sequence

postgresql