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Introduce VTabConnection and OrderBy

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This commit is contained in:
gwenn
2018-07-09 18:53:52 +02:00
parent ce0c9a6344
commit ce39b9a3c0
4 changed files with 82 additions and 27 deletions
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18
src/vtab/series.rs
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@@ -6,7 +6,7 @@ use std::os::raw::{c_char, c_int, c_void};
use error::error_from_sqlite_code;
use ffi;
use types::Type;
use vtab::{self, Context, IndexInfo, Module, VTab, VTabCursor, Values};
use vtab::{self, Context, IndexInfo, Module, VTab, VTabConnection, VTabCursor, Values};
use {Connection, Error, Result};
/// Register the "generate_series" module.
@@ -47,7 +47,7 @@ impl Module for Series {
}
fn connect(
_: &mut ffi::sqlite3,
_: &mut VTabConnection,
_aux: Option<&()>,
_args: &[&[u8]],
) -> Result<(String, SeriesTab)> {
@@ -155,10 +155,18 @@ impl VTab for SeriesTab {
},
));
info.set_estimated_rows(1000);
if info.num_of_order_by() == 1 {
if info.is_order_by_desc(0) {
idx_num |= QueryPlanFlags::DESC;
let order_by_consumed = {
let mut order_bys = info.order_bys();
if let Some(order_by) = order_bys.next() {
if order_by.is_order_by_desc() {
idx_num |= QueryPlanFlags::DESC;
}
true
} else {
false
}
};
if order_by_consumed {
info.set_order_by_consumed(true);
}
} else {