Squeal.PostgreSQL.Expression

Expressions are the atoms used to build statements.

Expression

newtype Expression (grp :: Grouping) (lat :: FromType) (with :: FromType) (db :: SchemasType) (params :: [NullType]) (from :: FromType) (ty :: NullType)

Expressions are used in a variety of contexts, such as in the target List of the select command, as new column values in insertInto or update, or in search Conditions in a number of commands.

The expression syntax allows the calculation of values from primitive expression using arithmetic, logical, and other operations.

The type parameters of Expression are

• lat :: FromType, the from clauses of any lat queries in which the Expression is a correlated subquery expression;
• with :: FromType, the CommonTableExpressions that are in scope for the Expression;
• grp :: Grouping, the Grouping of the from clause which may limit which columns may be referenced by alias;
• db :: SchemasType, the schemas of your database that are in scope for the Expression;
• from :: FromType, the from clause which the Expression may use to reference columns by alias;
• ty :: NullType, the type of the Expression.

Constructors

UnsafeExpression

Fields

• renderExpression :: ByteString

Instances

Aggregate AggregateArg (Expression (Grouped bys) :: FromType -> FromType -> SchemasType -> [NullType] -> FromType -> NullType -> Type)

Defined in Squeal.PostgreSQL.Expression.Aggregate

Methods

countStar :: Expression (Grouped bys) lat with db params from (NotNull PGint8)

count :: AggregateArg (ty ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (NotNull PGint8)

sum_ :: AggregateArg (null ty ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null (PGSum ty))

arrayAgg :: AggregateArg (ty ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null (PGvararray ty))

jsonAgg :: AggregateArg (ty ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGjson)

jsonbAgg :: AggregateArg (ty ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGjsonb)

bitAnd :: In int PGIntegral => AggregateArg (null int ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null int)

bitOr :: In int PGIntegral => AggregateArg (null int ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null int)

boolAnd :: AggregateArg (null PGbool ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGbool)

boolOr :: AggregateArg (null PGbool ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGbool)

every :: AggregateArg (null PGbool ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGbool)

max_ :: AggregateArg (null ty ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null ty)

min_ :: AggregateArg (null ty ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null ty)

avg :: AggregateArg (null ty ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null (PGAvg ty))

corr :: AggregateArg (null PGfloat8 ': (null PGfloat8 ': [])) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGfloat8)

covarPop :: AggregateArg (null PGfloat8 ': (null PGfloat8 ': [])) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGfloat8)

covarSamp :: AggregateArg (null PGfloat8 ': (null PGfloat8 ': [])) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGfloat8)

regrAvgX :: AggregateArg (null PGfloat8 ': (null PGfloat8 ': [])) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGfloat8)

regrAvgY :: AggregateArg (null PGfloat8 ': (null PGfloat8 ': [])) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGfloat8)

regrCount :: AggregateArg (null PGfloat8 ': (null PGfloat8 ': [])) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGint8)

regrIntercept :: AggregateArg (null PGfloat8 ': (null PGfloat8 ': [])) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGfloat8)

regrR2 :: AggregateArg (null PGfloat8 ': (null PGfloat8 ': [])) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGfloat8)

regrSlope :: AggregateArg (null PGfloat8 ': (null PGfloat8 ': [])) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGfloat8)

regrSxx :: AggregateArg (null PGfloat8 ': (null PGfloat8 ': [])) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGfloat8)

regrSxy :: AggregateArg (null PGfloat8 ': (null PGfloat8 ': [])) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGfloat8)

regrSyy :: AggregateArg (null PGfloat8 ': (null PGfloat8 ': [])) lat with db params from -> Expression (Grouped bys) lat with db params from (Null PGfloat8)

stddev :: AggregateArg (null ty ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null (PGAvg ty))

stddevPop :: AggregateArg (null ty ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null (PGAvg ty))

stddevSamp :: AggregateArg (null ty ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null (PGAvg ty))

variance :: AggregateArg (null ty ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null (PGAvg ty))

varPop :: AggregateArg (null ty ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null (PGAvg ty))

varSamp :: AggregateArg (null ty ': []) lat with db params from -> Expression (Grouped bys) lat with db params from (Null (PGAvg ty))

(Has tab (Join from lat) row, Has col row ty, GroupedBy tab col bys, columns ~ ((col ::: ty) ': ([] :: [(Symbol, NullType)]))) => IsQualified tab col (NP (Aliased (Expression (Grouped bys) lat with db params from)) columns)

Defined in Squeal.PostgreSQL.Expression

Methods

(!) :: Alias tab -> Alias col -> NP (Aliased (Expression (Grouped bys) lat with db params from)) columns

(Has tab (Join from lat) row, Has col row ty, GroupedBy tab col bys, column ~ (col ::: ty)) => IsQualified tab col (Aliased (Expression (Grouped bys) lat with db params from) column)

Defined in Squeal.PostgreSQL.Expression

Methods

(!) :: Alias tab -> Alias col -> Aliased (Expression (Grouped bys) lat with db params from) column

(Has tab (Join from lat) row, Has col row ty, GroupedBy tab col bys, tys ~ (ty ': ([] :: [NullType]))) => IsQualified tab col (NP (Expression (Grouped bys) lat with db params from) tys)

Defined in Squeal.PostgreSQL.Expression

Methods

(!) :: Alias tab -> Alias col -> NP (Expression (Grouped bys) lat with db params from) tys

(Has tab (Join from lat) row, Has col row ty, columns ~ ((col ::: ty) ': ([] :: [(Symbol, NullType)]))) => IsQualified tab col (NP (Aliased (Expression Ungrouped lat with db params from)) columns)

Defined in Squeal.PostgreSQL.Expression

Methods

(!) :: Alias tab -> Alias col -> NP (Aliased (Expression Ungrouped lat with db params from)) columns

(Has tab (Join from lat) row, Has col row ty, column ~ (col ::: ty)) => IsQualified tab col (Aliased (Expression Ungrouped lat with db params from) column)

Defined in Squeal.PostgreSQL.Expression

Methods

(!) :: Alias tab -> Alias col -> Aliased (Expression Ungrouped lat with db params from) column

(Has tab (Join from lat) row, Has col row ty, tys ~ (ty ': ([] :: [NullType]))) => IsQualified tab col (NP (Expression Ungrouped lat with db params from) tys)

Defined in Squeal.PostgreSQL.Expression

Methods

(!) :: Alias tab -> Alias col -> NP (Expression Ungrouped lat with db params from) tys

(Has tab (Join from lat) row, Has col row ty, GroupedBy tab col bys) => IsQualified tab col (Expression (Grouped bys) lat with db params from ty)

Defined in Squeal.PostgreSQL.Expression

Methods

(!) :: Alias tab -> Alias col -> Expression (Grouped bys) lat with db params from ty

(Has tab (Join from lat) row, Has col row ty) => IsQualified tab col (Expression Ungrouped lat with db params from ty)

Defined in Squeal.PostgreSQL.Expression

Methods

(!) :: Alias tab -> Alias col -> Expression Ungrouped lat with db params from ty

(HasUnique tab (Join from lat) row, Has col row ty, GroupedBy tab col bys, columns ~ ((col ::: ty) ': ([] :: [(Symbol, NullType)]))) => IsLabel col (NP (Aliased (Expression (Grouped bys) lat with db params from)) columns)

Defined in Squeal.PostgreSQL.Expression

Methods

fromLabel :: NP (Aliased (Expression (Grouped bys) lat with db params from)) columns

(HasUnique tab (Join from lat) row, Has col row ty, GroupedBy tab col bys, column ~ (col ::: ty)) => IsLabel col (Aliased (Expression (Grouped bys) lat with db params from) column)

Defined in Squeal.PostgreSQL.Expression

Methods

fromLabel :: Aliased (Expression (Grouped bys) lat with db params from) column

(HasUnique tab (Join from lat) row, Has col row ty, GroupedBy tab col bys, tys ~ (ty ': ([] :: [NullType]))) => IsLabel col (NP (Expression (Grouped bys) lat with db params from) tys)

Defined in Squeal.PostgreSQL.Expression

Methods

fromLabel :: NP (Expression (Grouped bys) lat with db params from) tys

(HasUnique tab (Join from lat) row, Has col row ty, columns ~ ((col ::: ty) ': ([] :: [(Symbol, NullType)]))) => IsLabel col (NP (Aliased (Expression Ungrouped lat with db params from)) columns)

Defined in Squeal.PostgreSQL.Expression

Methods

fromLabel :: NP (Aliased (Expression Ungrouped lat with db params from)) columns

(HasUnique tab (Join from lat) row, Has col row ty, column ~ (col ::: ty)) => IsLabel col (Aliased (Expression Ungrouped lat with db params from) column)

Defined in Squeal.PostgreSQL.Expression

Methods

fromLabel :: Aliased (Expression Ungrouped lat with db params from) column

(HasUnique tab (Join from lat) row, Has col row ty, tys ~ (ty ': ([] :: [NullType]))) => IsLabel col (NP (Expression Ungrouped lat with db params from) tys)

Defined in Squeal.PostgreSQL.Expression

Methods

fromLabel :: NP (Expression Ungrouped lat with db params from) tys

(HasUnique tab (Join from lat) row, Has col row ty, GroupedBy tab col bys) => IsLabel col (Expression (Grouped bys) lat with db params from ty)

Defined in Squeal.PostgreSQL.Expression

Methods

fromLabel :: Expression (Grouped bys) lat with db params from ty

(HasUnique tab (Join from lat) row, Has col row ty) => IsLabel col (Expression Ungrouped lat with db params from ty)

Defined in Squeal.PostgreSQL.Expression

Methods

fromLabel :: Expression Ungrouped lat with db params from ty

(KnownSymbol label, In label labels) => IsPGlabel label (Expression grp lat with db params from (null (PGenum labels)))

Defined in Squeal.PostgreSQL.Expression

Methods

label :: Expression grp lat with db params from (null (PGenum labels))

(KnownSymbol col, row ~ ((col ::: ty) ': ([] :: [(Symbol, NullType)]))) => Aliasable col (Expression grp lat with db params from ty) (Selection grp lat with db params from row)

Defined in Squeal.PostgreSQL.Query.Select

Methods

as :: Expression grp lat with db params from ty -> Alias col -> Selection grp lat with db params from row

Eq (Expression grp lat with db params from ty)

Defined in Squeal.PostgreSQL.Expression

Methods

(==) :: Expression grp lat with db params from ty -> Expression grp lat with db params from ty -> Bool

(/=) :: Expression grp lat with db params from ty -> Expression grp lat with db params from ty -> Bool

Floating (Expression grp lat with db params from (null PGnumeric))

Defined in Squeal.PostgreSQL.Expression

Methods

pi :: Expression grp lat with db params from (null PGnumeric)

exp :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

log :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

sqrt :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

(**) :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

logBase :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

sin :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

cos :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

tan :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

asin :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

acos :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

atan :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

sinh :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

cosh :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

tanh :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

asinh :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

acosh :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

atanh :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

log1p :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

expm1 :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

log1pexp :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

log1mexp :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

Floating (Expression grp lat with db params from (null PGfloat8))

Defined in Squeal.PostgreSQL.Expression

Methods

pi :: Expression grp lat with db params from (null PGfloat8)

exp :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

log :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

sqrt :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

(**) :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

logBase :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

sin :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

cos :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

tan :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

asin :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

acos :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

atan :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

sinh :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

cosh :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

tanh :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

asinh :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

acosh :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

atanh :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

log1p :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

expm1 :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

log1pexp :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

log1mexp :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

Floating (Expression grp lat with db params from (null PGfloat4))

Defined in Squeal.PostgreSQL.Expression

Methods

pi :: Expression grp lat with db params from (null PGfloat4)

exp :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

log :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

sqrt :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

(**) :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

logBase :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

sin :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

cos :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

tan :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

asin :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

acos :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

atan :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

sinh :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

cosh :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

tanh :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

asinh :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

acosh :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

atanh :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

log1p :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

expm1 :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

log1pexp :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

log1mexp :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

Fractional (Expression grp lat with db params from (null PGnumeric))

Defined in Squeal.PostgreSQL.Expression

Methods

(/) :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

recip :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

fromRational :: Rational -> Expression grp lat with db params from (null PGnumeric)

Fractional (Expression grp lat with db params from (null PGfloat8))

Defined in Squeal.PostgreSQL.Expression

Methods

(/) :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

recip :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

fromRational :: Rational -> Expression grp lat with db params from (null PGfloat8)

Fractional (Expression grp lat with db params from (null PGfloat4))

Defined in Squeal.PostgreSQL.Expression

Methods

(/) :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

recip :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

fromRational :: Rational -> Expression grp lat with db params from (null PGfloat4)

Num (Expression grp lat with db params from (null PGnumeric))

Defined in Squeal.PostgreSQL.Expression

Methods

(+) :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

(-) :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

(*) :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

negate :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

abs :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

signum :: Expression grp lat with db params from (null PGnumeric) -> Expression grp lat with db params from (null PGnumeric)

fromInteger :: Integer -> Expression grp lat with db params from (null PGnumeric)

Num (Expression grp lat with db params from (null PGfloat8))

Defined in Squeal.PostgreSQL.Expression

Methods

(+) :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

(-) :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

(*) :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

negate :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

abs :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

signum :: Expression grp lat with db params from (null PGfloat8) -> Expression grp lat with db params from (null PGfloat8)

fromInteger :: Integer -> Expression grp lat with db params from (null PGfloat8)

Num (Expression grp lat with db params from (null PGfloat4))

Defined in Squeal.PostgreSQL.Expression

Methods

(+) :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

(-) :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

(*) :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

negate :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

abs :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

signum :: Expression grp lat with db params from (null PGfloat4) -> Expression grp lat with db params from (null PGfloat4)

fromInteger :: Integer -> Expression grp lat with db params from (null PGfloat4)

Num (Expression grp lat with db params from (null PGint8))

Defined in Squeal.PostgreSQL.Expression

Methods

(+) :: Expression grp lat with db params from (null PGint8) -> Expression grp lat with db params from (null PGint8) -> Expression grp lat with db params from (null PGint8)

(-) :: Expression grp lat with db params from (null PGint8) -> Expression grp lat with db params from (null PGint8) -> Expression grp lat with db params from (null PGint8)

(*) :: Expression grp lat with db params from (null PGint8) -> Expression grp lat with db params from (null PGint8) -> Expression grp lat with db params from (null PGint8)

negate :: Expression grp lat with db params from (null PGint8) -> Expression grp lat with db params from (null PGint8)

abs :: Expression grp lat with db params from (null PGint8) -> Expression grp lat with db params from (null PGint8)

signum :: Expression grp lat with db params from (null PGint8) -> Expression grp lat with db params from (null PGint8)

fromInteger :: Integer -> Expression grp lat with db params from (null PGint8)

Num (Expression grp lat with db params from (null PGint4))

Defined in Squeal.PostgreSQL.Expression

Methods

(+) :: Expression grp lat with db params from (null PGint4) -> Expression grp lat with db params from (null PGint4) -> Expression grp lat with db params from (null PGint4)

(-) :: Expression grp lat with db params from (null PGint4) -> Expression grp lat with db params from (null PGint4) -> Expression grp lat with db params from (null PGint4)

(*) :: Expression grp lat with db params from (null PGint4) -> Expression grp lat with db params from (null PGint4) -> Expression grp lat with db params from (null PGint4)

negate :: Expression grp lat with db params from (null PGint4) -> Expression grp lat with db params from (null PGint4)

abs :: Expression grp lat with db params from (null PGint4) -> Expression grp lat with db params from (null PGint4)

signum :: Expression grp lat with db params from (null PGint4) -> Expression grp lat with db params from (null PGint4)

fromInteger :: Integer -> Expression grp lat with db params from (null PGint4)

Num (Expression grp lat with db params from (null PGint2))

Defined in Squeal.PostgreSQL.Expression

Methods

(+) :: Expression grp lat with db params from (null PGint2) -> Expression grp lat with db params from (null PGint2) -> Expression grp lat with db params from (null PGint2)

(-) :: Expression grp lat with db params from (null PGint2) -> Expression grp lat with db params from (null PGint2) -> Expression grp lat with db params from (null PGint2)

(*) :: Expression grp lat with db params from (null PGint2) -> Expression grp lat with db params from (null PGint2) -> Expression grp lat with db params from (null PGint2)

negate :: Expression grp lat with db params from (null PGint2) -> Expression grp lat with db params from (null PGint2)

abs :: Expression grp lat with db params from (null PGint2) -> Expression grp lat with db params from (null PGint2)

signum :: Expression grp lat with db params from (null PGint2) -> Expression grp lat with db params from (null PGint2)

fromInteger :: Integer -> Expression grp lat with db params from (null PGint2)

Ord (Expression grp lat with db params from ty)

Defined in Squeal.PostgreSQL.Expression

Methods

compare :: Expression grp lat with db params from ty -> Expression grp lat with db params from ty -> Ordering

(<) :: Expression grp lat with db params from ty -> Expression grp lat with db params from ty -> Bool

(<=) :: Expression grp lat with db params from ty -> Expression grp lat with db params from ty -> Bool

(>) :: Expression grp lat with db params from ty -> Expression grp lat with db params from ty -> Bool

(>=) :: Expression grp lat with db params from ty -> Expression grp lat with db params from ty -> Bool

max :: Expression grp lat with db params from ty -> Expression grp lat with db params from ty -> Expression grp lat with db params from ty

min :: Expression grp lat with db params from ty -> Expression grp lat with db params from ty -> Expression grp lat with db params from ty

Show (Expression grp lat with db params from ty)

Defined in Squeal.PostgreSQL.Expression

Methods

showsPrec :: Int -> Expression grp lat with db params from ty -> ShowS

show :: Expression grp lat with db params from ty -> String

showList :: [Expression grp lat with db params from ty] -> ShowS

IsString (Expression grp lat with db params from (null PGtsquery))

Defined in Squeal.PostgreSQL.Expression

Methods

fromString :: String -> Expression grp lat with db params from (null PGtsquery)

IsString (Expression grp lat with db params from (null PGtsvector))

Defined in Squeal.PostgreSQL.Expression

Methods

fromString :: String -> Expression grp lat with db params from (null PGtsvector)

IsString (Expression grp lat with db params from (null PGtext))

Defined in Squeal.PostgreSQL.Expression

Methods

fromString :: String -> Expression grp lat with db params from (null PGtext)

Generic (Expression grp lat with db params from ty)

Defined in Squeal.PostgreSQL.Expression

Associated Types

type Rep (Expression grp lat with db params from ty) :: Type -> Type

Methods

from :: Expression grp lat with db params from ty -> Rep (Expression grp lat with db params from ty) x

to :: Rep (Expression grp lat with db params from ty) x -> Expression grp lat with db params from ty

Semigroup (Expression grp lat with db params from (null PGtsvector))

Defined in Squeal.PostgreSQL.Expression

Methods

(<>) :: Expression grp lat with db params from (null PGtsvector) -> Expression grp lat with db params from (null PGtsvector) -> Expression grp lat with db params from (null PGtsvector)

sconcat :: NonEmpty (Expression grp lat with db params from (null PGtsvector)) -> Expression grp lat with db params from (null PGtsvector)

stimes :: Integral b => b -> Expression grp lat with db params from (null PGtsvector) -> Expression grp lat with db params from (null PGtsvector)

Semigroup (Expression grp lat with db params from (null PGtext))

Defined in Squeal.PostgreSQL.Expression

Methods

(<>) :: Expression grp lat with db params from (null PGtext) -> Expression grp lat with db params from (null PGtext) -> Expression grp lat with db params from (null PGtext)

sconcat :: NonEmpty (Expression grp lat with db params from (null PGtext)) -> Expression grp lat with db params from (null PGtext)

stimes :: Integral b => b -> Expression grp lat with db params from (null PGtext) -> Expression grp lat with db params from (null PGtext)

Semigroup (Expression grp lat with db params from (null PGjsonb))

Defined in Squeal.PostgreSQL.Expression

Methods

(<>) :: Expression grp lat with db params from (null PGjsonb) -> Expression grp lat with db params from (null PGjsonb) -> Expression grp lat with db params from (null PGjsonb)

sconcat :: NonEmpty (Expression grp lat with db params from (null PGjsonb)) -> Expression grp lat with db params from (null PGjsonb)

stimes :: Integral b => b -> Expression grp lat with db params from (null PGjsonb) -> Expression grp lat with db params from (null PGjsonb)

Semigroup (Expression grp lat with db params from (null (PGvararray ty)))

Defined in Squeal.PostgreSQL.Expression

Methods

(<>) :: Expression grp lat with db params from (null (PGvararray ty)) -> Expression grp lat with db params from (null (PGvararray ty)) -> Expression grp lat with db params from (null (PGvararray ty))

sconcat :: NonEmpty (Expression grp lat with db params from (null (PGvararray ty))) -> Expression grp lat with db params from (null (PGvararray ty))

stimes :: Integral b => b -> Expression grp lat with db params from (null (PGvararray ty)) -> Expression grp lat with db params from (null (PGvararray ty))

Monoid (Expression grp lat with db params from (null PGtsvector))

Defined in Squeal.PostgreSQL.Expression

Methods

mempty :: Expression grp lat with db params from (null PGtsvector)

mappend :: Expression grp lat with db params from (null PGtsvector) -> Expression grp lat with db params from (null PGtsvector) -> Expression grp lat with db params from (null PGtsvector)

mconcat :: [Expression grp lat with db params from (null PGtsvector)] -> Expression grp lat with db params from (null PGtsvector)

Monoid (Expression grp lat with db params from (null PGtext))

Defined in Squeal.PostgreSQL.Expression

Methods

mempty :: Expression grp lat with db params from (null PGtext)

mappend :: Expression grp lat with db params from (null PGtext) -> Expression grp lat with db params from (null PGtext) -> Expression grp lat with db params from (null PGtext)

mconcat :: [Expression grp lat with db params from (null PGtext)] -> Expression grp lat with db params from (null PGtext)

NFData (Expression grp lat with db params from ty)

Defined in Squeal.PostgreSQL.Expression

Methods

rnf :: Expression grp lat with db params from ty -> ()

RenderSQL (Expression grp lat with db params from ty)

Defined in Squeal.PostgreSQL.Expression

Methods

renderSQL :: Expression grp lat with db params from ty -> ByteString

type Rep (Expression grp lat with db params from ty)

Defined in Squeal.PostgreSQL.Expression

type Rep (Expression grp lat with db params from ty) = D1 (MetaData "Expression" "Squeal.PostgreSQL.Expression" "squeal-postgresql-0.7.0.1-33cXMmdyUeW5J6FQU4gmil" True) (C1 (MetaCons "UnsafeExpression" PrefixI True) (S1 (MetaSel (Just "renderExpression") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 ByteString)))

type Expr x

Arguments

 = Expression grp lat with db params from x

cannot reference aliases

An Expr is a closed Expression. It is a FRankNType but don't be scared. Think of it as an expression which sees no namespaces, so you can't use parameters or alias references. It can be used as a simple piece of more complex Expressions.

Function

type (-->) x y = forall db. Fun db x y

A RankNType for functions with a single argument. These could be either function calls or unary operators. This is a subtype of the usual Haskell function type ->, indeed a subcategory as it is closed under the usual . and id.

type Fun db x y

Arguments

 = Expression grp lat with db params from x

input

-> Expression grp lat with db params from y

output

Like --> but depends on the schemas of the database

unsafeFunction :: ByteString -> x --> y

>>> printSQL $ unsafeFunction "f" true
f(TRUE)

function

Arguments

:: (Has sch db schema, Has fun schema (Function ('[x] :=> Returns y)))

=> QualifiedAlias sch fun

function name

-> Fun db x y

Call a user defined function of a single variable

>>> type Fn = '[ 'Null 'PGint4] :=> 'Returns ('NotNull 'PGnumeric)
>>> type Schema = '["fn" ::: 'Function Fn]
>>> :{
let
  fn :: Fun (Public Schema) ('Null 'PGint4) ('NotNull 'PGnumeric)
  fn = function #fn
in
  printSQL (fn 1)
:}
"fn"((1 :: int4))

unsafeLeftOp :: ByteString -> x --> y

>>> printSQL $ unsafeLeftOp "NOT" true
(NOT TRUE)

unsafeRightOp :: ByteString -> x --> y

>>> printSQL $ true & unsafeRightOp "IS NOT TRUE"
(TRUE IS NOT TRUE)

Operator

type Operator x1 x2 y = forall db. OperatorDB db x1 x2 y

A RankNType for binary operators.

type OperatorDB db x1 x2 y

Arguments

 = Expression grp lat with db params from x1

left input

-> Expression grp lat with db params from x2

right input

-> Expression grp lat with db params from y

output

Like Operator but depends on the schemas of the database

unsafeBinaryOp :: ByteString -> Operator ty0 ty1 ty2

>>> printSQL $ unsafeBinaryOp "OR" true false
(TRUE OR FALSE)

class PGSubset ty where

Contained by operators

Minimal complete definition

Nothing

Methods

(@>) :: Operator (null0 ty) (null1 ty) (Null PGbool)

(<@) :: Operator (null0 ty) (null1 ty) (Null PGbool)

Instances

PGSubset PGjsonb

Defined in Squeal.PostgreSQL.Expression

Methods

(@>) :: Operator (null0 PGjsonb) (null1 PGjsonb) (Null PGbool)

(<@) :: Operator (null0 PGjsonb) (null1 PGjsonb) (Null PGbool)

PGSubset PGtsquery

Defined in Squeal.PostgreSQL.Expression

Methods

(@>) :: Operator (null0 PGtsquery) (null1 PGtsquery) (Null PGbool)

(<@) :: Operator (null0 PGtsquery) (null1 PGtsquery) (Null PGbool)

PGSubset (PGvararray ty :: PGType)

Defined in Squeal.PostgreSQL.Expression

Methods

(@>) :: Operator (null0 (PGvararray ty)) (null1 (PGvararray ty)) (Null PGbool)

(<@) :: Operator (null0 (PGvararray ty)) (null1 (PGvararray ty)) (Null PGbool)

PGSubset (PGrange ty :: PGType)

Defined in Squeal.PostgreSQL.Expression

Methods

(@>) :: Operator (null0 (PGrange ty)) (null1 (PGrange ty)) (Null PGbool)

(<@) :: Operator (null0 (PGrange ty)) (null1 (PGrange ty)) (Null PGbool)

class PGIntersect ty where

Intersection operator

Minimal complete definition

Nothing

Methods

(@&&) :: Operator (null0 ty) (null1 ty) (Null PGbool)

Instances

PGIntersect (PGvararray ty :: PGType)

Defined in Squeal.PostgreSQL.Expression

Methods

(@&&) :: Operator (null0 (PGvararray ty)) (null1 (PGvararray ty)) (Null PGbool)

PGIntersect (PGrange ty :: PGType)

Defined in Squeal.PostgreSQL.Expression

Methods

(@&&) :: Operator (null0 (PGrange ty)) (null1 (PGrange ty)) (Null PGbool)

Multivariable Function

type FunctionVar x0 x1 y

Arguments

 = [Expression grp lat with db params from x0]

inputs

-> Expression grp lat with db params from x1

must have at least 1 input

-> Expression grp lat with db params from y

output

A RankNType for functions with a variable-length list of homogeneous arguments and at least 1 more argument.

unsafeFunctionVar :: ByteString -> FunctionVar x0 x1 y

>>> printSQL (unsafeFunctionVar "greatest" [true, null_] false)
greatest(TRUE, NULL, FALSE)

type (--->) xs y = forall db. FunN db xs y

A RankNType for functions with a fixed-length list of heterogeneous arguments. Use the *: operator to end your argument lists, like so.

>>> printSQL (unsafeFunctionN "fun" (true :* false :* localTime *: true))
fun(TRUE, FALSE, LOCALTIME, TRUE)

type FunN db xs y

Arguments

 = NP (Expression grp lat with db params from) xs

inputs

-> Expression grp lat with db params from y

output

Like ---> but depends on the schemas of the database

unsafeFunctionN :: SListI xs => ByteString -> xs ---> y

>>> printSQL $ unsafeFunctionN "f" (currentTime :* localTimestamp :* false *: inline 'a')
f(CURRENT_TIME, LOCALTIMESTAMP, FALSE, (E'a' :: char(1)))

functionN

Arguments

:: (Has sch db schema, Has fun schema (Function (xs :=> Returns y)), SListI xs)

=> QualifiedAlias sch fun

function alias

-> FunN db xs y

Call a user defined multivariable function

>>> type Fn = '[ 'Null 'PGint4, 'Null 'PGbool] :=> 'Returns ('NotNull 'PGnumeric)
>>> type Schema = '["fn" ::: 'Function Fn]
>>> :{
let
  fn :: FunN (Public Schema) '[ 'Null 'PGint4, 'Null 'PGbool] ('NotNull 'PGnumeric)
  fn = functionN #fn
in
  printSQL (fn (1 *: true))
:}
"fn"((1 :: int4), TRUE)

Re-export

(&) :: a -> (a -> b) -> b infixl 1

& is a reverse application operator. This provides notational convenience. Its precedence is one higher than that of the forward application operator $, which allows & to be nested in $.

>>> 5 & (+1) & show
"6"

Since: base-4.8.0.0