Safe Haskell	None
Language	Haskell2010

Database.Persist.SqlBackend.StatementCache

Synopsis

Documentation

A statement cache used to lookup statements that have already been prepared for a given query.

Since: 2.13.3

Construct a StatementCacheKey from a raw SQL query.

Configuration parameters for creating a custom statement cache

Since: 2.13.3

Constructors

Fields

statementCacheLookup :: StatementCacheKey -> IO ( Maybe Statement )

Retrieve a statement from the cache, or return nothing if it is not found.

Since: 2.13.3
statementCacheInsert :: StatementCacheKey -> Statement -> IO ()

Put a new statement into the cache. An immediate lookup of the statement MUST return the inserted statement for the given cache key. Depending on the implementation, the statement cache MAY choose to evict other statements from the cache within this function.

Since: 2.13.3
statementCacheClear :: IO ()

Remove all statements from the cache. Implementations of this should be sure to call stmtFinalize on all statements removed from the cache.

Since: 2.13.3
statementCacheSize :: IO Int

Get the current size of the cache.

Since: 2.13.3

Make a simple statement cache that will cache statements if they are not currently cached.

Since: 2.13.3

Create a statement cache.

Since: 2.13.0