Enum FunctionDispatch 

pub enum FunctionDispatch {
    NumericOperator(NumericOperator),
    Pattern {
        operator: PatternOperator,
        oid: Option<NonZeroU32>,
    },
    PatternEscape {
        similar: bool,
    },
    BooleanTest(BooleanTest),
    Collate {
        oid: Option<u32>,
    },
    CollationFor {
        collation_oid: u32,
        noncollatable_type_oid: Option<u32>,
    },
    NamedArgument,
    VariadicArgument,
    ArraySubscripts,
    ArraySlices,
    ArraySlicesWithBounds(ArraySliceBounds),
    Subscript,
    Slice,
    FieldSelect,
    AnyOperator,
    AllOperator,
    IsDistinct,
    ValueIsDistinct,
    ValueNullTest {
        negated: bool,
    },
    BetweenSymmetric,
    ToBinInt4,
    ToBinInt8,
    ToHexInt4,
    ToHexInt8,
    ToOctInt4,
    ToOctInt8,
    RandomInt4Range,
    RandomInt8Range,
    RandomNumericRange,
    ArraySortJson,
    Concat {
        oid: Option<u32>,
    },
    ArrayConcat,
    ArrayAppend,
    ArrayPrepend,
    JsonPath {
        as_text: bool,
        jsonb: bool,
    },
    JsonExtract {
        as_text: bool,
        path: bool,
    },
    Range {
        operation: RangeFunctionOperation,
        subtype: RangeSubtype,
        multirange: bool,
    },
    Enum {
        operation: EnumFunctionOperation,
        type_oid: u32,
    },
    MergeAction,
}

Structural identity for parser-owned expressions and overload-specific built-in implementations. These variants occupy no SQL function-name namespace.

Variants

NumericOperator(NumericOperator)

Pattern

SQL pattern syntax, retaining its selected binary operator after escape processing.

Fields

operator: PatternOperator

oid: Option<NonZeroU32>

PatternEscape

A parser-owned escape helper, evaluated and folded independently of the strict match operator.

Fields

similar: bool

BooleanTest(BooleanTest)

A non-strict SQL Boolean test, distinct from routine lookup and equality.

Collate

A collation clause, retaining its selected identity independently of its written name.

Fields

oid: Option<u32>

CollationFor

The selected argument metadata of pg_collation_for; the argument still executes before the observation.

Fields

collation_oid: u32

noncollatable_type_oid: Option<u32>

NamedArgument

VariadicArgument

ArraySubscripts

ArraySlices

ArraySlicesWithBounds(ArraySliceBounds)

Slice syntax with independently retained omitted endpoints.

Subscript

Slice

FieldSelect

(expression).field: the field of a composite value, or the key of a document map.

AnyOperator

AllOperator

IsDistinct

ValueIsDistinct

One selected DISTINCT comparison of complete field values; nested ROW constructors remain one record-valued operand.

ValueNullTest

The outer NULL test selected by DISTINCT against a bare NULL, without testing individual record fields or requiring equality.

Fields

negated: bool

BetweenSymmetric

ToBinInt4

ToBinInt8

ToHexInt4

ToHexInt8

ToOctInt4

ToOctInt8

RandomInt4Range

RandomInt8Range

RandomNumericRange

ArraySortJson

Concat

SQL concatenation syntax, with its selected catalog overload after operand analysis.

Fields

oid: Option<u32>

ArrayConcat

The selected array || overload, retained even when its arguments evaluate to NULL.

ArrayAppend

ArrayPrepend

JsonPath

A resolved JSON path function whose final argument is the declared text array.

Fields

as_text: bool

jsonb: bool

JsonExtract

Fields

as_text: bool

path: bool

Range

Fields

operation: RangeFunctionOperation

subtype: RangeSubtype

multirange: bool

Enum

An anyenum support function bound to one concrete enum type.

Fields

operation: EnumFunctionOperation

type_oid: u32

MergeAction

The current MERGE action, read from the executor-owned row attribute.

Implementations

impl FunctionDispatch

pub const fn is_concatenation(self) -> bool

Whether this expression retains SQL concatenation syntax and operand roles.

pub const fn label(self) -> &'static str

Human-readable expression label used only in diagnostics and serialized plans; dispatch is always selected by the enum variant.

pub const fn is_call_argument_marker(self) -> bool

pub const fn json_extraction_symbol(self) -> Option<&'static str>

The SQL spelling of a retained JSON extraction operator, independent of its diagnostic label.

Trait Implementations

impl Clone for FunctionDispatch

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FunctionDispatch

impl Debug for FunctionDispatch

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for FunctionDispatch

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for FunctionDispatch

impl PartialEq for FunctionDispatch

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for FunctionDispatch

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for FunctionDispatch