Struct ExportBuilder 

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

Available on crate feature etl only.

A builder for an ETL EXPORT job.

This builder allows configuring various options for the EXPORT job, such as the source, number of readers, and CSV formatting options.

Once configured, the ExportBuilder::build method will create the EXPORT query and return a tuple containing the EtlQuery future and a Vec<ExaReader> of workers. The future must be awaited to drive the job to completion, while the workers are used to read the exported data.

Implementations

impl<'a> ExportBuilder<'a>

pub fn new_from_query(query: &'a str) -> ExportBuilder<'a>

pub fn new_from_table( name: &'a str, schema: Option<&'a str>, ) -> ExportBuilder<'a>

pub async fn build<'c>( &'a self, con: &'c mut ExaConnection, ) -> Result<(EtlQuery<'c>, Vec<ExaExport>), Error>

where 'c: 'a,

Builds the EXPORT job.

The output will be a future to await the result of the EXPORT query and the workers that can be used for ETL IO.

Errors

Returns an error if getting the nodes IPs from Exasol fails or if the worker sockets could not be connected.

pub fn num_readers(&mut self, num_readers: usize) -> &mut ExportBuilder<'a>

Sets the number of reader jobs that will be started.

If set to 0, then as many as possible will be used (one per node). Providing a number bigger than the number of nodes is the same as providing 0.

pub fn compression(&mut self, enabled: bool) -> &mut ExportBuilder<'a>

Available on crate feature compression only.

pub fn comment(&mut self, comment: &'a str) -> &mut ExportBuilder<'a>

pub fn encoding(&mut self, encoding: &'a str) -> &mut ExportBuilder<'a>

pub fn null(&mut self, null: &'a str) -> &mut ExportBuilder<'a>

pub fn row_separator( &mut self, separator: RowSeparator, ) -> &mut ExportBuilder<'a>

pub fn column_separator(&mut self, separator: &'a str) -> &mut ExportBuilder<'a>

pub fn column_delimiter(&mut self, delimiter: &'a str) -> &mut ExportBuilder<'a>

pub fn with_column_names(&mut self, flag: bool) -> &mut ExportBuilder<'a>

Trait Implementations

impl<'a> Debug for ExportBuilder<'a>

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

Formats the value using the given formatter.