Struct VectorRef 

pub struct VectorRef<'a> { /* private fields */ }

Read and write views over a single column of a DataChunkHandle, plus the ScalarArg/ScalarRet marshalling traits. A read-only view of one column of a data chunk.

Built from &DataChunkHandle, so multiple VectorRefs over different (or the same) columns may coexist freely — they only ever read.

Implementations

impl<'a> VectorRef<'a>

pub fn is_null(&self, row: usize) -> bool

Returns true if the value at row is NULL.

pub fn get<T: ScalarArg<'a>>(&self, row: usize) -> UdfResult<T>

Reads the value at row as T.

Errors

Returns an error if the underlying value cannot be converted to T.

pub fn as_duck_value(&self, row: usize) -> Result<DuckValue>

Reads the value at row as a dynamically-typed DuckValue, reusing the same decoder used for ordinary query results.

Errors

Returns an error if the value cannot be decoded.