Implement sqlite3_column_name and helper function to return column names

This commit is contained in:
Jayson Reis 2018-06-22 15:38:53 +02:00
parent e0793a38a6
commit fce61e13ad
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GPG Key ID: 32CAA472083D88E2
2 changed files with 20 additions and 1 deletions

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@ -55,6 +55,21 @@ impl<'l> Statement<'l> {
unsafe { ffi::sqlite3_column_count(self.raw.0) as usize }
}
/// Return the name of a column in the statement
#[inline]
pub fn column_name(&self, i: usize) -> String {
unsafe {
let ret = ffi::sqlite3_column_name(self.raw.0, i as c_int);
c_str_to_string!(ret)
}
}
/// Return column names in the statement
#[inline]
pub fn column_names(&self) -> Vec<String> {
(0..self.columns()).map(|i| self.column_name(i)).collect()
}
/// Return the type of a column.
///
/// The type is revealed after the first step has been taken.

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@ -137,11 +137,15 @@ fn cursor_workflow() {
#[test]
fn statement_columns() {
let connection = setup_users(":memory:");
let statement = "SELECT * FROM users";
let statement = "SELECT id, name, age, photo as user_photo FROM users";
let mut statement = ok!(connection.prepare(statement));
assert_eq!(statement.columns(), 4);
let column_names = statement.column_names();
assert_eq!(column_names, vec!["id", "name", "age", "user_photo"]);
assert_eq!("user_photo", statement.column_name(3));
assert_eq!(ok!(statement.next()), State::Row);
assert_eq!(statement.columns(), 4);