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Introduce IndexConstraintOp

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This commit is contained in:
gwenn 2016-08-14 12:26:05 +02:00
parent 4d2e881706
commit 3b5bd7abab
2 changed files with 39 additions and 13 deletions
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4
Cargo.toml
View File

@ -27,11 +27,11 @@ bitflags = "0.7"
lru-cache = "0.0.7"
libc = "~0.2"
chrono = { version = "~0.2", optional = true }
serde_json = { version = "0.6", optional = true }
serde_json = { version = "0.8", optional = true }
[dev-dependencies]
tempdir = "~0.3.4"
lazy_static = "~0.1"
lazy_static = "~0.2"
regex = "~0.1.41"
[dependencies.libsqlite3-sys]

48
src/vtab/mod.rs
View File

@ -51,6 +51,19 @@ pub trait VTab<C: VTabCursor<Self>>: Sized {
fn open(&self) -> Result<C>;
}
bitflags! {
#[doc = "Index constraint operator."]
#[repr(C)]
pub flags IndexConstraintOp: ::libc::c_uchar {
const SQLITE_INDEX_CONSTRAINT_EQ = 2,
const SQLITE_INDEX_CONSTRAINT_GT = 4,
const SQLITE_INDEX_CONSTRAINT_LE = 8,
const SQLITE_INDEX_CONSTRAINT_LT = 16,
const SQLITE_INDEX_CONSTRAINT_GE = 32,
const SQLITE_INDEX_CONSTRAINT_MATCH = 64,
}
}
pub struct IndexInfo(*mut ffi::sqlite3_index_info);
impl IndexInfo {
@ -62,23 +75,26 @@ impl IndexInfo {
pub fn constraint_column(&self, constraint_idx: usize) -> libc::c_int {
use std::slice;
unsafe {
let constraints = slice::from_raw_parts((*self.0).aConstraint, (*self.0).nConstraint as usize);
let constraints = slice::from_raw_parts((*self.0).aConstraint,
(*self.0).nConstraint as usize);
constraints[constraint_idx].iColumn
}
}
/// Constraint operator
pub fn constraint_operator(&self, constraint_idx: usize) -> u8 {
pub fn constraint_operator(&self, constraint_idx: usize) -> IndexConstraintOp {
use std::slice;
unsafe {
let constraints = slice::from_raw_parts((*self.0).aConstraint, (*self.0).nConstraint as usize);
constraints[constraint_idx].op
let constraints = slice::from_raw_parts((*self.0).aConstraint,
(*self.0).nConstraint as usize);
IndexConstraintOp::from_bits_truncate(constraints[constraint_idx].op)
}
}
/// True if this constraint is usable
pub fn constraint_usable(&self, constraint_idx: usize) -> bool {
use std::slice;
unsafe {
let constraints = slice::from_raw_parts((*self.0).aConstraint, (*self.0).nConstraint as usize);
let constraints = slice::from_raw_parts((*self.0).aConstraint,
(*self.0).nConstraint as usize);
constraints[constraint_idx].usable != 0
}
}
@ -108,7 +124,8 @@ impl IndexInfo {
pub fn set_argv_index(&mut self, constraint_idx: usize, argv_index: libc::c_int) {
use std::slice;
unsafe {
let mut constraint_usages = slice::from_raw_parts_mut((*self.0).aConstraintUsage, (*self.0).nConstraint as usize);
let mut constraint_usages = slice::from_raw_parts_mut((*self.0).aConstraintUsage,
(*self.0).nConstraint as usize);
constraint_usages[constraint_idx].argvIndex = argv_index;
}
}
@ -116,25 +133,34 @@ impl IndexInfo {
pub fn set_omit(&mut self, constraint_idx: usize, omit: bool) {
use std::slice;
unsafe {
let mut constraint_usages = slice::from_raw_parts_mut((*self.0).aConstraintUsage, (*self.0).nConstraint as usize);
let mut constraint_usages = slice::from_raw_parts_mut((*self.0).aConstraintUsage,
(*self.0).nConstraint as usize);
constraint_usages[constraint_idx].omit = if omit { 1 } else { 0 };
}
}
/// Number used to identify the index
pub fn set_idx_num(&mut self, idx_num: libc::c_int) {
unsafe { (*self.0).idxNum = idx_num; }
unsafe {
(*self.0).idxNum = idx_num;
}
}
/// True if output is already ordered
pub fn set_order_by_consumed(&mut self, order_by_consumed: bool) {
unsafe { (*self.0).orderByConsumed = if order_by_consumed { 1 } else { 0 }; }
unsafe {
(*self.0).orderByConsumed = if order_by_consumed { 1 } else { 0 };
}
}
/// Estimated cost of using this index
pub fn set_estimated_cost(&mut self, estimated_ost: f64) {
unsafe { (*self.0).estimatedCost = estimated_ost; }
unsafe {
(*self.0).estimatedCost = estimated_ost;
}
}
/// Estimated number of rows returned
pub fn set_estimated_rows(&mut self, estimated_rows: i64) {
unsafe { (*self.0).estimatedRows = estimated_rows; }
unsafe {
(*self.0).estimatedRows = estimated_rows;
}
}
}