pub struct ArrowBuilder {
columns: Vec<ArrowColumn>,
row_size_bytes: usize,
}
Fields§
§columns: Vec<ArrowColumn>
§row_size_bytes: usize
A crude estimate of the size of the data in the builder based on the size of the rows added to it.
Implementations§
Source§impl ArrowBuilder
impl ArrowBuilder
Sourcepub fn validate_desc(desc: &RelationDesc) -> Result<(), Error>
pub fn validate_desc(desc: &RelationDesc) -> Result<(), Error>
Helper to validate that a RelationDesc can be encoded into Arrow.
Sourcepub fn new(
desc: &RelationDesc,
item_capacity: usize,
data_capacity: usize,
) -> Result<Self, Error>
pub fn new( desc: &RelationDesc, item_capacity: usize, data_capacity: usize, ) -> Result<Self, Error>
Initializes a new ArrowBuilder with the schema of the provided RelationDesc.
item_capacity
is used to initialize the capacity of each column’s builder which defines
the number of values that can be appended to each column before reallocating.
data_capacity
is used to initialize the buffer size of the string and binary builders.
Errors if the relation contains an unimplemented type.
Sourcepub fn to_record_batch(self) -> Result<RecordBatch, ArrowError>
pub fn to_record_batch(self) -> Result<RecordBatch, ArrowError>
Converts the ArrowBuilder into an arrow RecordBatch.
Sourcepub fn add_row(&mut self, row: &Row) -> Result<(), Error>
pub fn add_row(&mut self, row: &Row) -> Result<(), Error>
Appends a row to the builder. Errors if the row contains an unimplemented or out-of-range value.
pub fn row_size_bytes(&self) -> usize
Auto Trait Implementations§
impl Freeze for ArrowBuilder
impl !RefUnwindSafe for ArrowBuilder
impl Send for ArrowBuilder
impl Sync for ArrowBuilder
impl Unpin for ArrowBuilder
impl !UnwindSafe for ArrowBuilder
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