Struct ProcedureSignature 

pub struct ProcedureSignature {
    pub inputs: Vec<String>,
    pub input_types: Vec<String>,
    pub outputs: Vec<String>,
}

A procedure’s declared shape – everything Executor needs to validate a CALL at the point it’s about to run (arity, coarse argument-type compatibility, output column names for YIELD), before ever asking ProcedureProvider::call to actually produce rows.

Fields

inputs: Vec<String>

Declared input parameter names, in order – used both for the InvalidNumberOfArguments arity check and for resolving a standalone call’s implicit arguments (CALL proc, no parens) from same-named $params.

input_types: Vec<String>

Each input’s declared type, in the same order as inputs – one of INTEGER/FLOAT/NUMBER/STRING/BOOLEAN (optionally suffixed with ? for nullable, which every real procedure signature is in practice; the ? doesn’t change compatibility checking here since Value::Null is always accepted regardless of declared type). Unrecognized type names are tolerated (treated as “accept anything”) rather than rejected – this is a coarse compile-time sanity check, not a full type system.

outputs: Vec<String>

Declared output column names, in order – what YIELD */an unqualified YIELD name (no AS) binds, and what call’s own returned rows are positionally shaped as.

Trait Implementations

impl Clone for ProcedureSignature

fn clone(&self) -> ProcedureSignature

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ProcedureSignature

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

Formats the value using the given formatter.