Portability	non-portable
Stability	experimental
Maintainer	haskelldb-users@lists.sourceforge.net
Safe Haskell	None

Database.HaskellDB.DBSpec

Description

DBSpec is the new and improved way of specifying databases. It is designed to be able to describe a database in such a way that it can easily be converted to a DBDirect-spec OR directly into a database

Synopsis

Documentation

data DBInfo Source

Defines a database layout, top level

Constructors

DBInfo
Fields dbname :: String The name of the database opts :: DBOptions Any options (i.e whether to use Bounded Strings) tbls :: [TInfo] Tables this database contains

Instances

Show DBInfo

data TInfo Source

Constructors

TInfo
Fields tname :: String The name of the table cols :: [CInfo] The columns in this table

Instances

Eq TInfo
Show TInfo

data CInfo Source

Constructors

CInfo
Fields cname :: String The name of this column descr :: FieldDesc The description of this column

Instances

Eq CInfo
Show CInfo

data DBOptions Source

Constructors

DBOptions
Fields useBString :: Bool Use Bounded Strings? makeIdent :: MakeIdentifiers Conversion routines from Database identifiers to Haskell identifiers

Instances

Show DBOptions

type FieldDesc = (FieldType, Bool)Source

The type and nullable flag of a database column

data FieldType Source

A database column type

Constructors

StringT
IntT
IntegerT
DoubleT
BoolT
CalendarTimeT
LocalTimeT
BStrT Int

Instances

Eq FieldType
Ord FieldType
Read FieldType
Show FieldType

makeDBSpec Source

Arguments

:: String	The name of the Database
-> DBOptions	Options
-> [TInfo]	Tables
-> DBInfo	The generated DBInfo

Creates a DBInfo

makeTInfo Source

Arguments

:: String	The table name
-> [CInfo]	Columns
-> TInfo	The generated TInfo

Creates a TInfo

makeCInfo Source

Arguments

:: String	The column name
-> FieldDesc	What the column contains
-> CInfo	The generated CInfo

Creates a CInfo

constructNonClashingDBInfo :: DBInfo -> DBInfo Source

Constructs a DBInfo that doesn't cause nameclashes

ppDBInfo :: DBInfo -> Doc Source

Pretty prints a DBInfo

ppTInfo :: TInfo -> Doc Source

ppCInfo :: CInfo -> Doc Source

ppDBOptions :: DBOptions -> Doc Source

dbInfoToDoc :: DBInfo -> Doc Source

Creates a valid declaration of a DBInfo. The variable name will be the same as the database name

finalizeSpec :: DBInfo -> DBInfo Source

Does a final touching up of a DBInfo before it is used by i.e DBDirect. This converts any Bounded Strings to ordinary strings if that flag is set.

dbToDBSpec Source

Arguments

:: Bool	Use bounded strings?
-> MakeIdentifiers	style of generated Haskell identifiers, cOLUMN_NAME vs. columnName
-> String	the name our database should have
-> Database	the database connection
-> IO DBInfo	return a DBInfo

Connects to a database and generates a specification from it

dbSpecToDatabase Source

Arguments

:: Database	A Database
-> DBInfo	The DBInfo to generate from
-> IO ()

Converts a DBInfo to a real life Database, note that the database must exist for this to work