Function arrow_schema_from

pub fn arrow_schema_from(
    resut_set_metadata: &mut impl ResultSetMetadata,
    map_value_errors_to_null: bool,
) -> Result<Schema, Error>

Query the metadata to create an arrow schema. This method is invoked automatically for you by crate::OdbcReaderBuilder::build. You may want to call this method in situtation ther you want to create an arrow schema without creating the reader yet.

Example

use anyhow::Error;

use arrow_odbc::{arrow_schema_from, arrow::datatypes::Schema, odbc_api::Connection};

fn fetch_schema_for_table(
    table_name: &str,
    connection: &Connection<'_>
) -> Result<Schema, Error> {
    // Query column with values to get a cursor
    let sql = format!("SELECT * FROM {}", table_name);
    let mut prepared = connection.prepare(&sql)?;
     
    // Now that we have prepared statement, we want to use it to query metadata.
    let map_errors_to_null = false;
    let schema = arrow_schema_from(&mut prepared, map_errors_to_null)?;
    Ok(schema)
}