GET_CACHE_TABLE

Description

The stored procedure GET_CACHE_TABLE returns the name of the table in the cache database that holds the cached data for a specific view. It also returns additional information about the cache configuration of the view.

You may also find useful the procedure GET_CACHE_COLUMNS.

Syntax

GET_CACHE_TABLE (
      input_database_name : text,
    , input_view_name : text
)
  • input_database_name: name of the database.
  • input_view_name: name of the view.

The procedure returns one row with these fields:

  • database_name: name of the database.
  • view_name: name of the view.
  • view_type: type of view. I.e. Base view, Select, Join, Interface, etc. When the type of the view is join, the value of this field includes the following information, in this order:
    • Type of join: it can be “Inner”, “Left outer”, “Right outer” or “Full outer”.
    • Join method: it can be “Any”, “Hash”, “Nested”, “Nested parallel” or “Merge”. “Any” means that the user did not select a method to execute the join when creating the view. Therefore, the Execution Engine will automatically select a method, unless one is selected in the “Execution plan” tab of the queried view.
    • Order of the join: it can be “Any”, “Ordered” or “Reverseorder”. “Any” means that the user did not select an order to execute the join when creating the view. Therefore, the Execution Engine will automatically select an order, unless one is selected in the “Execution plan” tab of the queried view.
  • cache_catalog_name: catalog of the table that stores the cached data.
  • cache_schema_name: schema of the table that stores the cached data.
  • cache_table_name: table that stores the cached data.
  • effective_ttl: Time To Live of the cached data. -1 if it is set to Never expire.
  • vdp_view_timezone: time zone of the view.
  • cache_timezone: time zone of the cache database.

It returns an error if the cache is not enabled on the view.

Privileges Required

You need to have at least Metadata privilege over the view input_view_name. If not, the procedure returns an error.