Interpreted with respect to the default database. Unqualified table or view names in the SELECT statement are They can also be expressions that use functions,Ĭonstant values, operators, and so forth. MariaDB > ALTER VIEW v AS SELECT * FROM t ĮRROR 6 (HY000): Error on delete of '.\test\arc/v.frm-0004' (Errcode: 2)Ĭolumns retrieved by the SELECT statement can be simple references to Mysqld is running, you will receive an error the next time you try to If you delete the arc subdirectory or its files while Is safe to remove these backup definitions, but only while mysqld is However, they are not needed for anythingīut to provide you with a backup of your previous view definition. Backed up view definitions are not preservedīy mysqldump, or any other such programs, but you can retain them The three latest view backupĭefinitions are stored. The backupįile for a view v is named v.frm-00001. Table's database directory, in a subdirectory named arc. Prior to MySQL 5.1.29, When you modify an existing view, theĬurrent view definition is backed up and saved. The number of names inĬolumn_list must be the same as the number of columns retrieved by the To define explicit namesįor the view columns, the optional column_list clause can be given asĪ list of comma-separated identifiers. Statement are used for the view column names. By default, the names of the columns retrieved by the SELECT Views must have unique column names with no duplicates, just like base CREATE VIEW test.v AS SELECT * FROM t īase tables and views share the same namespace within a database, so aĭatabase cannot contain a base table and a view that have the same Specify the name as db_name.view_name when you create it. To create the view explicitly in a given database, By default, a new view is created in theĭefault database. Must also have the DROP privilege for the view.Ī view belongs to a database. For columns used elsewhere in the SELECT statement you must View, and some privilege for each column selected by the SELECT The CREATE VIEW statement requires the CREATE VIEW privilege for the These clauses are described later in this section. OPTION clause can be given to constrain inserts or updates to rows in tables Used when checking access privileges at view invocation time. The DEFINER and SQL SECURITY clauses specify the security context to be The ALGORITHM clause affects how MariaDB processes the Later and the query may not be valid anymore. However, the base tables used by the views might be altered The view definition must be a query that does not return errors at viewĬreation times. Such queries are rewritten and column names are included in the view For example, if a view isĭefined as SELECT * on a table, new columns added to the table later do notīecome part of the view. Tables afterwards do not affect the view definition. The view definition is "frozen" at creation time, so changes to the underlying Statement.) select_statement can select from base tables or other views. (When you select from the view, you select in effect using the SELECT The select_statement is a SELECT statement that provides the definition of The CREATE VIEW statement creates a new view, or replaces an existing
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