Assuming that you need to look up for John Doe’s phone number on a phone book. An index cannot have an owner different from its table's owner. ALTER INDEX is in fact just an alias for the forms of ALTER TABLE that apply to indexes. Summary: in this tutorial, you will learn about indexes and how to use the PostgreSQL CREATE INDEX statement to define a new index for a table.. Phonebook analogy and index. In PostgreSQL, ALTER INDEX command changes the definition of an existing index. Synopsis ALTER INDEX [ IF EXISTS ] name RENAME TO new_name ALTER INDEX [ IF EXISTS ] name SET TABLESPACE tablespace_name ALTER INDEX name DEPENDS ON EXTENSION extension_name ALTER INDEX [ IF EXISTS ] name SET ( storage_parameter = value [, ... ] ) ALTER INDEX [ IF …

ALTER INDEX changes the definition of an existing index. ALTER INDEX changes the definition of an existing index. Notez que les tables et index placés dans d'autres tablespaces ne sont pas affectés. The REBUILD clause reconstructs an index, replacing the old copy of the index with an updated version based on the index's table. 名前 ALTER INDEX -- インデックス定義を変更する. This form changes the index's tablespace to the specified tablespace and moves the data file (s) associated with the index to the new tablespace. ALTER DATABASE modifie les attributs d ... Cette commande déplace physiquement toutes tables et index actuellement dans l'ancien tablespace par défaut de la base de données vers le nouveau tablespace. Note that the lock level required may differ for each subform. There are several subforms described below. Description. ALTER INDEX - changer la définition d'un index . A normal DROP INDEX acquires exclusive lock on the table, blocking other accesses until the index drop can be completed. Auparavant, il existait une variante ALTER INDEX OWNER mais elle est maintenant ignorée (avec un message d'avertissement). The RENAME form changes the name of the index.
Changing the table's owner automatically changes the index as well. ALTER INDEX is in fact just an alias for the forms of ALTER TABLE that apply to indexes. ALTER INDEX is in fact just an alias for the forms of ALTER TABLE that apply to indexes. Alter Index in PostgreSQL, Oracle, SQL Server. There was formerly an ALTER INDEX OWNER variant, but this is now ignored (with a warning). In this article we give an overview of the types of indexes available, and explain different ways of using and maintaining the most common index type: B-Trees. Modifier le propriétaire de la table modifie automatiquement celui de l'index.

ALTER INDEX.
Syntax. When multiple subcommands are listed, the lock held will be the strictest one required from any subcommand. Un index ne peut pas avoir un propriétaire différent de celui de la table. Changing the table's owner automatically changes the index … The RENAME clause changes the name of the index. PostgreSQL 9.4.5文書; 前のページ: 上に戻る: 次のページ: ALTER INDEX.

There are several subforms: RENAME. When multiple subcommands are given, the lock acquired will be the strictest one required by any subcommand.

An index is a way to efficiently retrieve a relatively small number of rows from a table. An ACCESS EXCLUSIVE lock is held unless explicitly noted. ALTER INDEX n'est en fait qu'un alias pour les formes d' ALTER TABLE qui s'appliquent aux index. Alter Index in PostgreSQL 9.3.13. An ACCESS EXCLUSIVE lock is acquired unless explicitly noted. ALTER INDEX changes the definition of an existing index. Il est interdit de modifier toute partie d'un index du catalogue système. The PostgreSQL ALTER TABLE command is used to add, delete or modify columns in an existing table.. You would also use ALTER TABLE command to add and drop various constraints on an existing table. Changing any part of a system catalog index is not permitted. PostgreSQL 10 . There was formerly an ALTER INDEX OWNER variant, but this is now ignored (with a warning). There was formerly an ALTER INDEX OWNER variant, but this is now ignored (with a warning). ALTER INDEX changes the definition of an existing index. An index cannot have an owner different from its table's owner. This form changes the index's tablespace to the specified tablespace and moves the data file (s) associated with the index to the new tablespace. ALTER TABLE changes the definition of an existing table.