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CSVSource

connectorx::sources::csv

Struct CSVSource 

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pub struct CSVSource { /* private fields */ }

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impl Source for CSVSource

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const DATA_ORDERS: &'static [DataOrder]

Supported data orders, ordering by preference.
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type Partition = CSVSourcePartition

The partition type produced by partition. It is sent to a worker thread, so it must be Send.
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type TypeSystem = CSVTypeSystem

The type system this Source associated with.
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type Error = CSVSourceError

The error type returned by this source and its partitions.
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fn set_data_order( &mut self, data_order: DataOrder, ) -> Result<(), CSVSourceError>

Set the data order negotiated between this source and the destination, one of DATA_ORDERS. Return an error if the order is not supported.
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fn set_queries<Q: ToString>(&mut self, queries: &[CXQuery<Q>])

Set the partitioned queries. Each query becomes one SourcePartition.
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fn set_origin_query(&mut self, _query: Option<String>)

Set the original, unpartitioned query, if there is one. Sources can use it to count the rows of the whole result in result_rows.
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fn fetch_metadata(&mut self) -> Result<(), CSVSourceError>

Fetch the result schema (column names and types) of the queries, e.g. by preparing the statement or running a LIMIT 0 query. Called before names and schema.
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fn result_rows(&mut self) -> Result<Option<usize>, CSVSourceError>

Get total number of rows if available. Read more
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fn names(&self) -> Vec<String>

The column names of the result, available after fetch_metadata.
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fn schema(&self) -> Vec<Self::TypeSystem>

The column types of the result, available after fetch_metadata.
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fn partition(self) -> Result<Vec<Self::Partition>, CSVSourceError>

Consume the source and create one partition per query given to set_queries, in the same order.
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fn set_pre_execution_queries( &mut self, _pre_execution_queries: Option<&[String]>, )

Set queries to run on each connection before the partitioned queries. The default implementation panics; sources that support it override it.

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