system.query_condition_cache

Description

Affiche le contenu du cache des conditions de requête.

Colonnes

key_hash (UInt128) — Hachage de (table_uuid, part_name, condition_hash).
entry_size (UInt64) — Taille de l’entrée en octets.
matching_marks (String) — Marks correspondantes.

Exemple

Querysql

SELECT * FROM system.query_condition_cache FORMAT Vertical;

Responsetext

Row 1:
──────
table_uuid:     28270a24-ea27-49f6-99cd-97b9bee976ac
part_name:      all_1_1_0
condition:      or(equals(b, 10000_UInt16), equals(c, 10000_UInt16))
condition_hash: 5456494897146899690 -- 5.46 quintillion
entry_size:     40
matching_marks: 111111110000000000000000000000000000000000000000000000000111111110000000000000000

1 row in set. Elapsed: 0.004 sec.