Enum mz_expr::func::VariadicFunc

pub enum VariadicFunc {
    Coalesce,
    Greatest,
    Least,
    Concat,
    MakeTimestamp,
    PadLeading,
    Substr,
    Replace,
    JsonbBuildArray,
    JsonbBuildObject,
    ArrayCreate {
        elem_type: ScalarType,
    },
    ArrayToString {
        elem_type: ScalarType,
    },
    ArrayIndex {
        offset: usize,
    },
    ListCreate {
        elem_type: ScalarType,
    },
    RecordCreate {
        field_names: Vec<ColumnName>,
    },
    ListIndex,
    ListSliceLinear,
    SplitPart,
    RegexpMatch,
    HmacString,
    HmacBytes,
    ErrorIfNull,
    DateBinTimestamp,
    DateBinTimestampTz,
    And,
    Or,
}

Variants

Coalesce

Greatest

Least

Concat

MakeTimestamp

PadLeading

Substr

Replace

JsonbBuildArray

JsonbBuildObject

ArrayCreate

Fields

elem_type: ScalarType

ArrayToString

Fields

elem_type: ScalarType

ArrayIndex

Fields

offset: usize

ListCreate

Fields

elem_type: ScalarType

RecordCreate

Fields

field_names: Vec<ColumnName>

ListIndex

ListSliceLinear

SplitPart

RegexpMatch

HmacString

HmacBytes

ErrorIfNull

DateBinTimestamp

DateBinTimestampTz

And

Or

Implementations

impl VariadicFunc

pub fn eval<'a>(
    &'a self,
    datums: &[Datum<'a>],
    temp_storage: &'a RowArena,
    exprs: &'a [MirScalarExpr]
) -> Result<Datum<'a>, EvalError>

pub fn output_type(&self, input_types: Vec<ColumnType>) -> ColumnType

pub fn propagates_nulls(&self) -> bool

Whether the function output is NULL if any of its inputs are NULL.

pub fn introduces_nulls(&self) -> bool

Whether the function might return NULL even if none of its inputs are NULL.

This is presently conservative, and may indicate that a function introduces nulls even when it does not.

pub fn switch_and_or(&self) -> Self

pub fn is_infix_op(&self) -> bool

pub fn unit_of_and_or(&self) -> MirScalarExpr

Gives the unit (u) of OR or AND, such that u AND/OR x == x. Note that a 0-arg AND/OR evaluates to unit_of_and_or.

pub fn zero_of_and_or(&self) -> MirScalarExpr

Gives the zero (z) of OR or AND, such that z AND/OR x == z.

Trait Implementations

impl Arbitrary for VariadicFunc

An explicit Arbitrary implementation needed here because of a known proptest issue.

Revert to the derive-macro impementation once the issue¹ is fixed.

---

1. https://github.com/AltSysrq/proptest/issues/152 ↩

type Parameters = ()

The type of parameters that arbitrary_with accepts for configuration of the generated Strategy. Parameters must implement Default.

type Strategy = Union<BoxedStrategy<VariadicFunc>>

The type of Strategy used to generate values of type Self.

fn arbitrary_with(_: Self::Parameters) -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). The strategy is passed the arguments given in args.

fn arbitrary() -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self).

impl Clone for VariadicFunc

fn clone(&self) -> VariadicFunc

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for VariadicFunc

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for VariadicFunc

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Display for VariadicFunc

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for VariadicFunc

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl MzReflect for VariadicFunc

fn add_to_reflected_type_info(rti: &mut ReflectedTypeInfo)

Adds names and types of the fields of the struct or enum to rti.

impl Ord for VariadicFunc

fn cmp(&self, other: &VariadicFunc) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<VariadicFunc> for VariadicFunc

fn eq(&self, other: &VariadicFunc) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &VariadicFunc) -> bool

This method tests for !=.

impl PartialOrd<VariadicFunc> for VariadicFunc

fn partial_cmp(&self, other: &VariadicFunc) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for VariadicFunc

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.

impl Eq for VariadicFunc

impl StructuralEq for VariadicFunc

impl StructuralPartialEq for VariadicFunc