https://stackoverflow.com › questions › 68809678

my_list (id int PRIMARY KEY UNIQUE NOT NULL DEFAULT nextval('my_list_id_seq'), mycardno); ALTER SEQUENCE my_list_id_seq OWNED BY my_list.id; I tried to use currval query to find the next sequence value (should be 1) but I get. SELECT currval('my_list_id_seq');

https://postgresql-tutorial.com › postgresql-how-to-get-current-and-next-values-of-sequence

Next Value (nextval): To get the next value of a sequence and increment the sequence, you can use the nextval function. Here’s the syntax: SELECT nextval('sequence_name'); Again, replace 'sequence_name' with the name of the sequence you want to retrieve the next value for.Example: SELECT nextval('my_sequence');

https://stackoverflow.com › questions › 18232714

To get the current value of a sequence without affecting it or needing a previous insert in the same session, you can use; SELECT last_value FROM tablename_fieldname_seq; An SQLfiddle to test with.

https://stackoverflow.com › questions › 13393604

To answer your question literally, here's how to get the next value of a sequence without incrementing it: SELECT CASE WHEN is_called THEN last_value + 1 ELSE last_value END FROM sequence_name

https://www.postgresql.org › docs › current › functions-sequence.html

The two-parameter form sets the sequence's last_value field to the specified value and sets its is_called field to true, meaning that the next nextval will advance the sequence before returning a value. The value that will be reported by currval is also set to the specified value.

https://database.guide › how-nextval-works-in-postgresql

In PostgreSQL, the nextval() function is used to advance sequence objects to their next value and return that value. We pass the name of the sequence when we call the function. This assumes that the sequence object exists. Syntax. The syntax goes like this: nextval ( regclass )

https://docs.postgresql.fr › current › functions-sequence.html

Cette section décrit les fonctions pour opérer sur des objets séquence, aussi appelés des générateurs de séquence ou plus simplement séquences. Les objets séquence sont des tables spéciales à une ligne créées avec l'ordre CREATE SEQUENCE.

https://docs.postgresql.fr › 9.6 › functions-sequence.html

La forme avec deux paramètres initialise le champ last_value de la séquence à la valeur précisée et initialise le champ is_called à true, signifiant que le prochain nextval avance la séquence avant de renvoyer une valeur.

https://www.postgresqltutorial.com › postgresql-tutorial › postgresql-sequences

To get the next value from the sequence, you use the nextval() function: SELECT nextval ('mysequence'); Code language: SQL (Structured Query Language) (sql)