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https://github.com/isar/rusqlite.git
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Remove int_array module
Replaced by array module.
This commit is contained in:
gwenn
parent
1a1d41b4e4
commit
e040dc9e1f
@ -1,214 +0,0 @@
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//! Int array virtual table.
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//! Port of C ["intarray"](http://www.sqlite.org/cgi/src/finfo?name=src/test_intarray.h).
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use std::cell::RefCell;
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use std::default::Default;
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use std::os::raw::{c_char, c_int, c_void};
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use std::rc::Rc;
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use ffi;
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use vtab::{declare_vtab, escape_double_quote, Context, IndexInfo, VTab, VTabCursor, Values};
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use {Connection, Error, Result};
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/// Create a specific instance of an intarray object.
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/// The new intarray object is returned.
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///
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/// Each intarray object corresponds to a virtual table in the TEMP table
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/// with the specified `name`.
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pub fn create_int_array(conn: &Connection, name: &str) -> Result<Rc<RefCell<Vec<i64>>>> {
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let array = Rc::new(RefCell::new(Vec::new()));
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try!(conn.create_module(name, &INT_ARRAY_MODULE, Some(array.clone())));
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try!(conn.execute_batch(&format!(
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"CREATE VIRTUAL TABLE temp.\"{0}\" USING \"{0}\"",
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escape_double_quote(name)
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)));
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Ok(array)
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}
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/// Destroy the intarray object by dropping the virtual table.
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/// If not done explicitly by the application, the virtual table will be dropped implicitly
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/// by the system when the database connection is closed.
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/// In fact, the intarray is not destroy until the connection is closed
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/// because there is no other way to destroy the associated module.
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pub fn drop_int_array(conn: &Connection, name: &str) -> Result<()> {
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conn.execute_batch(&format!(
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"DROP TABLE temp.\"{0}\"",
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escape_double_quote(name)
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))
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// http://www.mail-archive.com/sqlite-users%40mailinglists.sqlite.org/msg08423.html
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// "Once a virtual table module has been created, it cannot be modified or destroyed, except by closing the database connection."
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// let aux: Option<()> = None;
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// conn.create_module(name, ptr::null() as *const ffi::sqlite3_module, aux)
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}
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eponymous_module!(
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INT_ARRAY_MODULE,
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IntArrayVTab,
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Rc<RefCell<Vec<i64>>>,
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IntArrayVTabCursor,
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Some(int_array_connect),
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int_array_connect,
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int_array_best_index,
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int_array_disconnect,
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Some(int_array_disconnect),
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int_array_open,
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int_array_close,
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int_array_filter,
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int_array_next,
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int_array_eof,
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int_array_column,
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int_array_rowid
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);
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#[repr(C)]
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struct IntArrayVTab {
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/// Base class
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base: ffi::sqlite3_vtab,
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array: *const Rc<RefCell<Vec<i64>>>,
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}
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impl VTab for IntArrayVTab {
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type Aux = Rc<RefCell<Vec<i64>>>;
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type Cursor = IntArrayVTabCursor;
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unsafe fn connect(
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db: *mut ffi::sqlite3,
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aux: *mut Rc<RefCell<Vec<i64>>>,
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_args: &[&[u8]],
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) -> Result<IntArrayVTab> {
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let array = aux as *const Rc<RefCell<Vec<i64>>>;
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let vtab = IntArrayVTab {
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base: Default::default(),
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array,
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};
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try!(declare_vtab(
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db,
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"CREATE TABLE x(value INTEGER PRIMARY KEY)"
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));
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Ok(vtab)
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}
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fn best_index(&self, _info: &mut IndexInfo) -> Result<()> {
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Ok(())
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}
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fn open(&self) -> Result<IntArrayVTabCursor> {
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Ok(IntArrayVTabCursor::new())
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}
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}
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#[derive(Default)]
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#[repr(C)]
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struct IntArrayVTabCursor {
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/// Base class
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base: ffi::sqlite3_vtab_cursor,
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/// Current cursor position
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i: usize,
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}
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impl IntArrayVTabCursor {
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fn new() -> IntArrayVTabCursor {
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IntArrayVTabCursor {
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base: Default::default(),
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i: 0,
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}
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}
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}
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impl VTabCursor for IntArrayVTabCursor {
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type Table = IntArrayVTab;
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fn vtab(&self) -> &IntArrayVTab {
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unsafe { &*(self.base.pVtab as *const IntArrayVTab) }
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}
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fn filter(&mut self, _idx_num: c_int, _idx_str: Option<&str>, _args: &Values) -> Result<()> {
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self.i = 0;
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Ok(())
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}
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fn next(&mut self) -> Result<()> {
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self.i += 1;
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Ok(())
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}
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fn eof(&self) -> bool {
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let vtab = self.vtab();
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unsafe {
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let array = (*vtab.array).borrow();
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self.i >= array.len()
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}
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}
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fn column(&self, ctx: &mut Context, _i: c_int) -> Result<()> {
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let vtab = self.vtab();
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unsafe {
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let array = (*vtab.array).borrow();
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ctx.set_result(&array[self.i])
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}
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}
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fn rowid(&self) -> Result<i64> {
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Ok(self.i as i64)
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}
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}
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#[cfg(test)]
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mod test {
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use vtab::int_array;
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use Connection;
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#[test]
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#[cfg_attr(rustfmt, rustfmt_skip)]
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fn test_int_array_module() {
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let db = Connection::open_in_memory().unwrap();
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db.execute_batch("CREATE TABLE t1 (x INT);
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INSERT INTO t1 VALUES (1);
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INSERT INTO t1 VALUES (3);
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CREATE TABLE t2 (y INT);
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INSERT INTO t2 VALUES (11);
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CREATE TABLE t3 (z INT);
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INSERT INTO t3 VALUES (-5);").unwrap();
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let p1 = int_array::create_int_array(&db, "ex1").unwrap();
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let p2 = int_array::create_int_array(&db, "ex2").unwrap();
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let p3 = int_array::create_int_array(&db, "ex3").unwrap();
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let mut s = db.prepare("SELECT * FROM t1, t2, t3
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WHERE t1.x IN ex1
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AND t2.y IN ex2
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AND t3.z IN ex3").unwrap();
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p1.borrow_mut().append(&mut vec![1, 2, 3, 4]);
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p2.borrow_mut().append(&mut vec![5, 6, 7, 8, 9, 10, 11]);
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p3.borrow_mut().append(&mut vec![-1, -5, -10]);
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{
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s.query_map(&[], |row| {
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let i1: i64 = row.get(0);
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assert!(i1 == 1 || i1 == 3);
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assert_eq!(11, row.get::<_, i32>(1));
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assert_eq!(-5, row.get::<_, i32>(2));
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}).unwrap();
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}
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p1.borrow_mut().clear();
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p2.borrow_mut().clear();
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p3.borrow_mut().clear();
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p1.borrow_mut().append(&mut vec![1]);
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p2.borrow_mut().append(&mut vec![7, 11]);
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p3.borrow_mut().append(&mut vec![-5, -10]);
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{
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let mut rows = s.query(&[]).unwrap();
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let row = rows.next().unwrap().unwrap();
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assert_eq!(1, row.get::<_, i32>(0));
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assert_eq!(11, row.get::<_, i32>(1));
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assert_eq!(-5, row.get::<_, i32>(2));
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}
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p2.borrow_mut().clear();
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p3.borrow_mut().clear();
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p2.borrow_mut().append(&mut vec![3, 4, 5]);
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p3.borrow_mut().append(&mut vec![0, -5]);
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let mut rows = s.query(&[]).unwrap();
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assert!(rows.next().is_none());
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int_array::drop_int_array(&db, "ex1").unwrap();
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int_array::drop_int_array(&db, "ex2").unwrap();
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int_array::drop_int_array(&db, "ex3").unwrap();
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}
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}
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@ -779,7 +779,6 @@ pub fn mprintf(err_msg: &str) -> *mut c_char {
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pub mod array;
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#[cfg(feature = "csvtab")]
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pub mod csvtab;
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pub mod int_array;
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#[cfg(feature = "bundled")]
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pub mod series; // SQLite >= 3.9.0
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