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// Copyright 2015-2020 Aerospike, Inc.
//
// Portions may be licensed to Aerospike, Inc. under one or more contributor
// license agreements.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
//! Functions used for Filter Expressions. This module requires Aerospike Server version >= 5.2
pub mod bitwise;
pub mod hll;
pub mod lists;
pub mod maps;
pub mod regex_flag;
use crate::commands::buffer::Buffer;
use crate::errors::Result;
use crate::msgpack::encoder::{pack_array_begin, pack_integer, pack_raw_string, pack_value};
use crate::operations::cdt_context::CdtContext;
use crate::{ParticleType, Value};
use std::collections::HashMap;
use std::fmt::Debug;
/// Expression Data Types for usage in some `FilterExpressions` on for example Map and List
#[derive(Debug, Clone, Copy)]
pub enum ExpType {
/// NIL Expression Type
NIL = 0,
/// BOOLEAN Expression Type
BOOL = 1,
/// INTEGER Expression Type
INT = 2,
/// STRING Expression Type
STRING = 3,
/// LIST Expression Type
LIST = 4,
/// MAP Expression Type
MAP = 5,
/// BLOB Expression Type
BLOB = 6,
/// FLOAT Expression Type
FLOAT = 7,
/// GEO String Expression Type
GEO = 8,
/// HLL Expression Type
HLL = 9,
}
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub enum ExpOp {
Unknown = 0,
EQ = 1,
NE = 2,
GT = 3,
GE = 4,
LT = 5,
LE = 6,
Regex = 7,
Geo = 8,
And = 16,
Or = 17,
Not = 18,
Xor = 19,
Add = 20,
Sub = 21,
Mul = 22,
Div = 23,
Pow = 24,
Log = 25,
Mod = 26,
Abs = 27,
Floor = 28,
Ceil = 29,
ToInt = 30,
ToFloat = 31,
IntAnd = 32,
IntOr = 33,
IntXor = 34,
IntNot = 35,
IntLshift = 36,
IntRshift = 37,
IntARshift = 38,
IntCount = 39,
IntLscan = 40,
IntRscan = 41,
Min = 50,
Max = 51,
DigestModulo = 64,
DeviceSize = 65,
LastUpdate = 66,
SinceUpdate = 67,
VoidTime = 68,
TTL = 69,
SetName = 70,
KeyExists = 71,
IsTombstone = 72,
Key = 80,
Bin = 81,
BinType = 82,
Cond = 123,
Var = 124,
Let = 125,
Quoted = 126,
Call = 127,
}
#[doc(hidden)]
pub const MODIFY: i64 = 0x40;
#[derive(Debug, Clone)]
#[doc(hidden)]
pub enum ExpressionArgument {
Value(Value),
FilterExpression(FilterExpression),
Context(Vec<CdtContext>),
}
/// Filter expression, which can be applied to most commands, to control which records are
/// affected by the command. Filter expression are created using the functions in the
/// [expressions](crate::expressions) module and its submodules.
#[derive(Debug, Clone)]
pub struct FilterExpression {
/// The Operation code
cmd: Option<ExpOp>,
/// The Primary Value of the Operation
val: Option<Value>,
/// The Bin to use it on (REGEX for example)
bin: Option<Box<FilterExpression>>,
/// The additional flags for the Operation (REGEX or return_type of Module for example)
flags: Option<i64>,
/// The optional Module flag for Module operations or Bin Types
module: Option<ExpType>,
/// Sub commands for the CmdExp operation
exps: Option<Vec<FilterExpression>>,
/// Optional Arguments (CDT)
arguments: Option<Vec<ExpressionArgument>>,
}
#[doc(hidden)]
impl FilterExpression {
fn new(
cmd: Option<ExpOp>,
val: Option<Value>,
bin: Option<FilterExpression>,
flags: Option<i64>,
module: Option<ExpType>,
exps: Option<Vec<FilterExpression>>,
) -> FilterExpression {
let bin = bin.map(Box::new);
FilterExpression {
cmd,
val,
bin,
flags,
module,
exps,
arguments: None,
}
}
fn pack_expression(
&self,
exps: &[FilterExpression],
buf: &mut Option<&mut Buffer>,
) -> Result<usize> {
let mut size = 0;
if let Some(val) = &self.val {
// DEF expression
size += pack_raw_string(buf, &val.to_string())?;
size += exps[0].pack(buf)?;
} else {
// Normal Expressions
match self.cmd.unwrap() {
ExpOp::Let => {
// Let wire format: LET <defname1>, <defexp1>, <defname2>, <defexp2>, ..., <scope exp>
let count = (exps.len() - 1) * 2 + 2;
size += pack_array_begin(buf, count)?;
}
_ => {
size += pack_array_begin(buf, exps.len() + 1)?;
}
}
size += pack_integer(buf, self.cmd.unwrap() as i64)?;
for exp in exps {
size += exp.pack(buf)?;
}
}
Ok(size)
}
fn pack_command(&self, cmd: ExpOp, buf: &mut Option<&mut Buffer>) -> Result<usize> {
let mut size = 0;
match cmd {
ExpOp::Regex => {
size += pack_array_begin(buf, 4)?;
// The Operation
size += pack_integer(buf, cmd as i64)?;
// Regex Flags
size += pack_integer(buf, self.flags.unwrap())?;
// Raw String is needed instead of the msgpack String that the pack_value method would use.
size += pack_raw_string(buf, &self.val.clone().unwrap().to_string())?;
// The Bin
size += self.bin.clone().unwrap().pack(buf)?;
}
ExpOp::Call => {
// Packing logic for Module
size += pack_array_begin(buf, 5)?;
// The Operation
size += pack_integer(buf, cmd as i64)?;
// The Module Operation
size += pack_integer(buf, self.module.unwrap() as i64)?;
// The Module (List/Map or Bitwise)
size += pack_integer(buf, self.flags.unwrap())?;
// Encoding the Arguments
if let Some(args) = &self.arguments {
let mut len = 0;
for arg in args {
// First match to estimate the Size and write the Context
match arg {
ExpressionArgument::Value(_)
| ExpressionArgument::FilterExpression(_) => len += 1,
ExpressionArgument::Context(ctx) => {
if !ctx.is_empty() {
size += pack_array_begin(buf, 3)?;
size += pack_integer(buf, 0xff)?;
size += pack_array_begin(buf, ctx.len() * 2)?;
for c in ctx {
size += pack_integer(buf, i64::from(c.id))?;
size += pack_value(buf, &c.value)?;
}
}
}
}
}
size += pack_array_begin(buf, len)?;
// Second match to write the real values
for arg in args {
match arg {
ExpressionArgument::Value(val) => {
size += pack_value(buf, val)?;
}
ExpressionArgument::FilterExpression(cmd) => {
size += cmd.pack(buf)?;
}
_ => {}
}
}
} else {
// No Arguments
size += pack_value(buf, &self.val.clone().unwrap())?;
}
// Write the Bin
size += self.bin.clone().unwrap().pack(buf)?;
}
ExpOp::Bin => {
// Bin Encoder
size += pack_array_begin(buf, 3)?;
// The Bin Operation
size += pack_integer(buf, cmd as i64)?;
// The Bin Type (INT/String etc.)
size += pack_integer(buf, self.module.unwrap() as i64)?;
// The name - Raw String is needed instead of the msgpack String that the pack_value method would use.
size += pack_raw_string(buf, &self.val.clone().unwrap().to_string())?;
}
ExpOp::BinType | ExpOp::Var => {
// BinType/Var encoder
size += pack_array_begin(buf, 2)?;
// BinType/Var Operation
size += pack_integer(buf, cmd as i64)?;
// The name - Raw String is needed instead of the msgpack String that the pack_value method would use.
size += pack_raw_string(buf, &self.val.clone().unwrap().to_string())?;
}
_ => {
// Packing logic for all other Ops
if let Some(value) = &self.val {
// Operation has a Value
size += pack_array_begin(buf, 2)?;
// Write the Operation
size += pack_integer(buf, cmd as i64)?;
// Write the Value
size += pack_value(buf, value)?;
} else {
// Operation has no Value
size += pack_array_begin(buf, 1)?;
// Write the Operation
size += pack_integer(buf, cmd as i64)?;
}
}
}
Ok(size)
}
fn pack_value(&self, buf: &mut Option<&mut Buffer>) -> Result<usize> {
// Packing logic for Value based Ops
pack_value(buf, &self.val.clone().unwrap())
}
pub fn pack(&self, buf: &mut Option<&mut Buffer>) -> Result<usize> {
let mut size = 0;
if let Some(exps) = &self.exps {
size += self.pack_expression(exps, buf)?;
} else if let Some(cmd) = self.cmd {
size += self.pack_command(cmd, buf)?;
} else {
size += self.pack_value(buf)?;
}
Ok(size)
}
}
/// Create a record key expression of specified type.
/// ```
/// use aerospike::expressions::{ExpType, ge, int_val, key};
/// // Integer record key >= 100000
/// ge(key(ExpType::INT), int_val(10000));
/// ```
pub fn key(exp_type: ExpType) -> FilterExpression {
FilterExpression::new(
Some(ExpOp::Key),
Some(Value::from(exp_type as i64)),
None,
None,
None,
None,
)
}
/// Create function that returns if the primary key is stored in the record meta data
/// as a boolean expression. This would occur when `send_key` is true on record write.
/// ```
/// // Key exists in record meta data
/// use aerospike::expressions::key_exists;
/// key_exists();
/// ```
pub fn key_exists() -> FilterExpression {
FilterExpression::new(Some(ExpOp::KeyExists), None, None, None, None, None)
}
/// Create 64 bit int bin expression.
/// ```
/// // Integer bin "a" == 500
/// use aerospike::expressions::{int_bin, int_val, eq};
/// eq(int_bin("a".to_string()), int_val(500));
/// ```
pub fn int_bin(name: String) -> FilterExpression {
FilterExpression::new(
Some(ExpOp::Bin),
Some(Value::from(name)),
None,
None,
Some(ExpType::INT),
None,
)
}
/// Create string bin expression.
/// ```
/// // String bin "a" == "views"
/// use aerospike::expressions::{eq, string_bin, string_val};
/// eq(string_bin("a".to_string()), string_val("views".to_string()));
/// ```
pub fn string_bin(name: String) -> FilterExpression {
FilterExpression::new(
Some(ExpOp::Bin),
Some(Value::from(name)),
None,
None,
Some(ExpType::STRING),
None,
)
}
/// Create blob bin expression.
/// ```
/// // String bin "a" == [1,2,3]
/// use aerospike::expressions::{eq, blob_bin, blob_val};
/// let blob: Vec<u8> = vec![1,2,3];
/// eq(blob_bin("a".to_string()), blob_val(blob));
/// ```
pub fn blob_bin(name: String) -> FilterExpression {
FilterExpression::new(
Some(ExpOp::Bin),
Some(Value::from(name)),
None,
None,
Some(ExpType::BLOB),
None,
)
}
/// Create 64 bit float bin expression.
/// ```
/// use aerospike::expressions::{float_val, float_bin, eq};
/// // Integer bin "a" == 500.5
/// eq(float_bin("a".to_string()), float_val(500.5));
/// ```
pub fn float_bin(name: String) -> FilterExpression {
FilterExpression::new(
Some(ExpOp::Bin),
Some(Value::from(name)),
None,
None,
Some(ExpType::FLOAT),
None,
)
}
/// Create geo bin expression.
/// ```
/// // String bin "a" == region
/// use aerospike::expressions::{eq, geo_bin, string_val};
/// let region = "{ \"type\": \"AeroCircle\", \"coordinates\": [[-122.0, 37.5], 50000.0] }";
/// eq(geo_bin("a".to_string()), string_val(region.to_string()));
/// ```
pub fn geo_bin(name: String) -> FilterExpression {
FilterExpression::new(
Some(ExpOp::Bin),
Some(Value::from(name)),
None,
None,
Some(ExpType::GEO),
None,
)
}
/// Create list bin expression.
/// ```
/// use aerospike::expressions::{ExpType, eq, int_val, list_bin};
/// use aerospike::operations::lists::ListReturnType;
/// use aerospike::expressions::lists::get_by_index;
/// // String bin a[2] == 3
/// eq(get_by_index(ListReturnType::Values, ExpType::INT, int_val(2), list_bin("a".to_string()), &[]), int_val(3));
/// ```
pub fn list_bin(name: String) -> FilterExpression {
FilterExpression::new(
Some(ExpOp::Bin),
Some(Value::from(name)),
None,
None,
Some(ExpType::LIST),
None,
)
}
/// Create map bin expression.
///
/// ```
/// // Bin a["key"] == "value"
/// use aerospike::expressions::{ExpType, string_val, map_bin, eq};
/// use aerospike::MapReturnType;
/// use aerospike::expressions::maps::get_by_key;
///
/// eq(
/// get_by_key(MapReturnType::Value, ExpType::STRING, string_val("key".to_string()), map_bin("a".to_string()), &[]),
/// string_val("value".to_string()));
/// ```
pub fn map_bin(name: String) -> FilterExpression {
FilterExpression::new(
Some(ExpOp::Bin),
Some(Value::from(name)),
None,
None,
Some(ExpType::MAP),
None,
)
}
/// Create a HLL bin expression
///
/// ```
/// use aerospike::expressions::{gt, list_val, hll_bin, int_val};
/// use aerospike::operations::hll::HLLPolicy;
/// use aerospike::Value;
/// use aerospike::expressions::hll::add;
///
/// // Add values to HLL bin "a" and check count > 7
/// let list = vec![Value::from(1)];
/// gt(add(HLLPolicy::default(), list_val(list), hll_bin("a".to_string())), int_val(7));
/// ```
pub fn hll_bin(name: String) -> FilterExpression {
FilterExpression::new(
Some(ExpOp::Bin),
Some(Value::from(name)),
None,
None,
Some(ExpType::HLL),
None,
)
}
/// Create function that returns if bin of specified name exists.
/// ```
/// // Bin "a" exists in record
/// use aerospike::expressions::bin_exists;
/// bin_exists("a".to_string());
/// ```
pub fn bin_exists(name: String) -> FilterExpression {
ne(bin_type(name), int_val(ParticleType::NULL as i64))
}
/// Create function that returns bin's integer particle type.
/// ```
/// use aerospike::ParticleType;
/// use aerospike::expressions::{eq, bin_type, int_val};
/// // Bin "a" particle type is a list
/// eq(bin_type("a".to_string()), int_val(ParticleType::LIST as i64));
/// ```
pub fn bin_type(name: String) -> FilterExpression {
FilterExpression::new(
Some(ExpOp::BinType),
Some(Value::from(name)),
None,
None,
None,
None,
)
}
/// Create function that returns record set name string.
/// ```
/// use aerospike::expressions::{eq, set_name, string_val};
/// // Record set name == "myset
/// eq(set_name(), string_val("myset".to_string()));
/// ```
pub fn set_name() -> FilterExpression {
FilterExpression::new(Some(ExpOp::SetName), None, None, None, None, None)
}
/// Create function that returns record size on disk.
/// If server storage-engine is memory, then zero is returned.
/// ```
/// use aerospike::expressions::{ge, device_size, int_val};
/// // Record device size >= 100 KB
/// ge(device_size(), int_val(100*1024));
/// ```
pub fn device_size() -> FilterExpression {
FilterExpression::new(Some(ExpOp::DeviceSize), None, None, None, None, None)
}
/// Create function that returns record last update time expressed as 64 bit integer
/// nanoseconds since 1970-01-01 epoch.
/// ```
/// // Record last update time >=2020-08-01
/// use aerospike::expressions::{ge, last_update, float_val};
/// ge(last_update(), float_val(1.5962E+18));
/// ```
pub fn last_update() -> FilterExpression {
FilterExpression::new(Some(ExpOp::LastUpdate), None, None, None, None, None)
}
/// Create expression that returns milliseconds since the record was last updated.
/// This expression usually evaluates quickly because record meta data is cached in memory.
///
/// ```
/// // Record last updated more than 2 hours ago
/// use aerospike::expressions::{gt, int_val, since_update};
/// gt(since_update(), int_val(2 * 60 * 60 * 1000));
/// ```
pub fn since_update() -> FilterExpression {
FilterExpression::new(Some(ExpOp::SinceUpdate), None, None, None, None, None)
}
/// Create function that returns record expiration time expressed as 64 bit integer
/// nanoseconds since 1970-01-01 epoch.
/// ```
/// // Expires on 2020-08-01
/// use aerospike::expressions::{and, ge, last_update, float_val, lt};
/// and(vec![ge(last_update(), float_val(1.5962E+18)), lt(last_update(), float_val(1.5963E+18))]);
/// ```
pub fn void_time() -> FilterExpression {
FilterExpression::new(Some(ExpOp::VoidTime), None, None, None, None, None)
}
/// Create function that returns record expiration time (time to live) in integer seconds.
/// ```
/// // Record expires in less than 1 hour
/// use aerospike::expressions::{lt, ttl, int_val};
/// lt(ttl(), int_val(60*60));
/// ```
pub fn ttl() -> FilterExpression {
FilterExpression::new(Some(ExpOp::TTL), None, None, None, None, None)
}
/// Create expression that returns if record has been deleted and is still in tombstone state.
/// This expression usually evaluates quickly because record meta data is cached in memory.
///
/// ```
/// // Deleted records that are in tombstone state.
/// use aerospike::expressions::{is_tombstone};
/// is_tombstone();
/// ```
pub fn is_tombstone() -> FilterExpression {
FilterExpression::new(Some(ExpOp::IsTombstone), None, None, None, None, None)
}
/// Create function that returns record digest modulo as integer.
/// ```
/// // Records that have digest(key) % 3 == 1
/// use aerospike::expressions::{int_val, eq, digest_modulo};
/// eq(digest_modulo(3), int_val(1));
/// ```
pub fn digest_modulo(modulo: i64) -> FilterExpression {
FilterExpression::new(
Some(ExpOp::DigestModulo),
Some(Value::from(modulo)),
None,
None,
None,
None,
)
}
/// Create function like regular expression string operation.
/// ```
/// use aerospike::RegexFlag;
/// use aerospike::expressions::{regex_compare, string_bin};
/// // Select string bin "a" that starts with "prefix" and ends with "suffix".
/// // Ignore case and do not match newline.
/// regex_compare("prefix.*suffix".to_string(), RegexFlag::ICASE as i64 | RegexFlag::NEWLINE as i64, string_bin("a".to_string()));
/// ```
pub fn regex_compare(regex: String, flags: i64, bin: FilterExpression) -> FilterExpression {
FilterExpression::new(
Some(ExpOp::Regex),
Some(Value::from(regex)),
Some(bin),
Some(flags),
None,
None,
)
}
/// Create compare geospatial operation.
/// ```
/// use aerospike::expressions::{geo_compare, geo_bin, geo_val};
/// // Query region within coordinates.
/// let region = "{\"type\": \"Polygon\", \"coordinates\": [ [[-122.500000, 37.000000],[-121.000000, 37.000000], [-121.000000, 38.080000],[-122.500000, 38.080000], [-122.500000, 37.000000]] ] }";
/// geo_compare(geo_bin("a".to_string()), geo_val(region.to_string()));
/// ```
pub fn geo_compare(left: FilterExpression, right: FilterExpression) -> FilterExpression {
FilterExpression::new(
Some(ExpOp::Geo),
None,
None,
None,
None,
Some(vec![left, right]),
)
}
/// Creates 64 bit integer value
pub fn int_val(val: i64) -> FilterExpression {
FilterExpression::new(None, Some(Value::from(val)), None, None, None, None)
}
/// Creates a Boolean value
pub fn bool_val(val: bool) -> FilterExpression {
FilterExpression::new(None, Some(Value::from(val)), None, None, None, None)
}
/// Creates String bin value
pub fn string_val(val: String) -> FilterExpression {
FilterExpression::new(None, Some(Value::from(val)), None, None, None, None)
}
/// Creates 64 bit float bin value
pub fn float_val(val: f64) -> FilterExpression {
FilterExpression::new(None, Some(Value::from(val)), None, None, None, None)
}
/// Creates Blob bin value
pub fn blob_val(val: Vec<u8>) -> FilterExpression {
FilterExpression::new(None, Some(Value::from(val)), None, None, None, None)
}
/// Create List bin Value
pub fn list_val(val: Vec<Value>) -> FilterExpression {
FilterExpression::new(
Some(ExpOp::Quoted),
Some(Value::from(val)),
None,
None,
None,
None,
)
}
/// Create Map bin Value
#[allow(clippy::implicit_hasher)]
pub fn map_val(val: HashMap<Value, Value>) -> FilterExpression {
FilterExpression::new(None, Some(Value::from(val)), None, None, None, None)
}
/// Create geospatial json string value.
pub fn geo_val(val: String) -> FilterExpression {
FilterExpression::new(None, Some(Value::from(val)), None, None, None, None)
}
/// Create a Nil Value
pub fn nil() -> FilterExpression {
FilterExpression::new(None, Some(Value::Nil), None, None, None, None)
}
/// Create "not" operator expression.
/// ```
/// // ! (a == 0 || a == 10)
/// use aerospike::expressions::{not, or, eq, int_bin, int_val};
/// not(or(vec![eq(int_bin("a".to_string()), int_val(0)), eq(int_bin("a".to_string()), int_val(10))]));
/// ```
pub fn not(exp: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Not),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![exp]),
arguments: None,
}
}
/// Create "and" (&&) operator that applies to a variable number of expressions.
/// ```
/// // (a > 5 || a == 0) && b < 3
/// use aerospike::expressions::{and, or, gt, int_bin, int_val, eq, lt};
/// and(vec![or(vec![gt(int_bin("a".to_string()), int_val(5)), eq(int_bin("a".to_string()), int_val(0))]), lt(int_bin("b".to_string()), int_val(3))]);
/// ```
pub const fn and(exps: Vec<FilterExpression>) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::And),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(exps),
arguments: None,
}
}
/// Create "or" (||) operator that applies to a variable number of expressions.
/// ```
/// // a == 0 || b == 0
/// use aerospike::expressions::{or, eq, int_bin, int_val};
/// or(vec![eq(int_bin("a".to_string()), int_val(0)), eq(int_bin("b".to_string()), int_val(0))]);
/// ```
pub const fn or(exps: Vec<FilterExpression>) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Or),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(exps),
arguments: None,
}
}
/// Create equal (==) expression.
/// ```
/// // a == 11
/// use aerospike::expressions::{eq, int_bin, int_val};
/// eq(int_bin("a".to_string()), int_val(11));
/// ```
pub fn eq(left: FilterExpression, right: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::EQ),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![left, right]),
arguments: None,
}
}
/// Create not equal (!=) expression
/// ```
/// // a != 13
/// use aerospike::expressions::{ne, int_bin, int_val};
/// ne(int_bin("a".to_string()), int_val(13));
/// ```
pub fn ne(left: FilterExpression, right: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::NE),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![left, right]),
arguments: None,
}
}
/// Create greater than (>) operation.
/// ```
/// // a > 8
/// use aerospike::expressions::{gt, int_bin, int_val};
/// gt(int_bin("a".to_string()), int_val(8));
/// ```
pub fn gt(left: FilterExpression, right: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::GT),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![left, right]),
arguments: None,
}
}
/// Create greater than or equal (>=) operation.
/// ```
/// use aerospike::expressions::{ge, int_bin, int_val};
/// // a >= 88
/// ge(int_bin("a".to_string()), int_val(88));
/// ```
pub fn ge(left: FilterExpression, right: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::GE),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![left, right]),
arguments: None,
}
}
/// Create less than (<) operation.
/// ```
/// // a < 1000
/// use aerospike::expressions::{lt, int_bin, int_val};
/// lt(int_bin("a".to_string()), int_val(1000));
/// ```
pub fn lt(left: FilterExpression, right: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::LT),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![left, right]),
arguments: None,
}
}
/// Create less than or equals (<=) operation.
/// ```
/// use aerospike::expressions::{le, int_bin, int_val};
/// // a <= 1
/// le(int_bin("a".to_string()), int_val(1));
/// ```
pub fn le(left: FilterExpression, right: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::LE),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![left, right]),
arguments: None,
}
}
/// Create "add" (+) operator that applies to a variable number of expressions.
/// Return sum of all `FilterExpressions` given. All arguments must resolve to the same type (integer or float).
/// Requires server version 5.6.0+.
/// ```
/// use aerospike::expressions::{eq, num_add, int_bin, int_val};
/// // a + b + c == 10
/// eq(num_add(vec![int_bin("a".to_string()), int_bin("b".to_string()), int_bin("c".to_string())]), int_val(10));
/// ```
pub const fn num_add(exps: Vec<FilterExpression>) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Add),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(exps),
arguments: None,
}
}
/// Create "subtract" (-) operator that applies to a variable number of expressions.
/// If only one `FilterExpressions` is provided, return the negation of that argument.
/// Otherwise, return the sum of the 2nd to Nth `FilterExpressions` subtracted from the 1st
/// `FilterExpressions`. All `FilterExpressions` must resolve to the same type (integer or float).
/// Requires server version 5.6.0+.
/// ```
/// use aerospike::expressions::{gt, num_sub, int_bin, int_val};
/// // a - b - c > 10
/// gt(num_sub(vec![int_bin("a".to_string()), int_bin("b".to_string()), int_bin("c".to_string())]), int_val(10));
/// ```
pub const fn num_sub(exps: Vec<FilterExpression>) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Sub),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(exps),
arguments: None,
}
}
/// Create "multiply" (*) operator that applies to a variable number of expressions.
/// Return the product of all `FilterExpressions`. If only one `FilterExpressions` is supplied, return
/// that `FilterExpressions`. All `FilterExpressions` must resolve to the same type (integer or float).
/// Requires server version 5.6.0+.
/// ```
/// use aerospike::expressions::{lt, num_mul, int_val, int_bin};
/// // a * b * c < 100
/// lt(num_mul(vec![int_bin("a".to_string()), int_bin("b".to_string()), int_bin("c".to_string())]), int_val(100));
/// ```
pub const fn num_mul(exps: Vec<FilterExpression>) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Mul),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(exps),
arguments: None,
}
}
/// Create "divide" (/) operator that applies to a variable number of expressions.
/// If there is only one `FilterExpressions`, returns the reciprocal for that `FilterExpressions`.
/// Otherwise, return the first `FilterExpressions` divided by the product of the rest.
/// All `FilterExpressions` must resolve to the same type (integer or float).
/// Requires server version 5.6.0+.
/// ```
/// use aerospike::expressions::{lt, int_val, int_bin, num_div};
/// // a / b / c > 1
/// lt(num_div(vec![int_bin("a".to_string()), int_bin("b".to_string()), int_bin("c".to_string())]), int_val(1));
/// ```
pub const fn num_div(exps: Vec<FilterExpression>) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Div),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(exps),
arguments: None,
}
}
/// Create "power" operator that raises a "base" to the "exponent" power.
/// All arguments must resolve to floats.
/// Requires server version 5.6.0+.
/// ```
/// // pow(a, 2.0) == 4.0
/// use aerospike::expressions::{eq, num_pow, float_bin, float_val};
/// eq(num_pow(float_bin("a".to_string()), float_val(2.0)), float_val(4.0));
/// ```
pub fn num_pow(base: FilterExpression, exponent: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Pow),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![base, exponent]),
arguments: None,
}
}
/// Create "log" operator for logarithm of "num" with base "base".
/// All arguments must resolve to floats.
/// Requires server version 5.6.0+.
/// ```
/// // log(a, 2.0) == 4.0
/// use aerospike::expressions::{eq, float_bin, float_val, num_log};
/// eq(num_log(float_bin("a".to_string()), float_val(2.0)), float_val(4.0));
/// ```
pub fn num_log(num: FilterExpression, base: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Log),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![num, base]),
arguments: None,
}
}
/// Create "modulo" (%) operator that determines the remainder of "numerator"
/// divided by "denominator". All arguments must resolve to integers.
/// Requires server version 5.6.0+.
/// ```
/// // a % 10 == 0
/// use aerospike::expressions::{eq, num_mod, int_val, int_bin};
/// eq(num_mod(int_bin("a".to_string()), int_val(10)), int_val(0));
/// ```
pub fn num_mod(numerator: FilterExpression, denominator: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Mod),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![numerator, denominator]),
arguments: None,
}
}
/// Create operator that returns absolute value of a number.
/// All arguments must resolve to integer or float.
/// Requires server version 5.6.0+.
/// ```
/// // abs(a) == 1
/// use aerospike::expressions::{eq, int_val, int_bin, num_abs};
/// eq(num_abs(int_bin("a".to_string())), int_val(1));
/// ```
pub fn num_abs(value: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Abs),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![value]),
arguments: None,
}
}
/// Create expression that rounds a floating point number down to the closest integer value.
/// The return type is float.
// Requires server version 5.6.0+.
/// ```
/// // floor(2.95) == 2.0
/// use aerospike::expressions::{eq, num_floor, float_val};
/// eq(num_floor(float_val(2.95)), float_val(2.0));
/// ```
pub fn num_floor(num: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Floor),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![num]),
arguments: None,
}
}
/// Create expression that rounds a floating point number up to the closest integer value.
/// The return type is float.
/// Requires server version 5.6.0+.
/// ```
/// // ceil(2.15) == 3.0
/// use aerospike::expressions::{float_val, num_ceil, ge};
/// ge(num_ceil(float_val(2.15)), float_val(3.0));
/// ```
pub fn num_ceil(num: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Ceil),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![num]),
arguments: None,
}
}
/// Create expression that converts an integer to a float.
/// Requires server version 5.6.0+.
/// ```
/// // int(2.5) == 2
/// use aerospike::expressions::{float_val, eq, to_int, int_val};
/// eq(to_int(float_val(2.5)), int_val(2));
/// ```
pub fn to_int(num: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::ToInt),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![num]),
arguments: None,
}
}
/// Create expression that converts a float to an integer.
/// Requires server version 5.6.0+.
/// ```
/// // float(2) == 2.0
/// use aerospike::expressions::{float_val, eq, to_float, int_val};
/// eq(to_float(int_val(2)), float_val(2.0));
/// ```
pub fn to_float(num: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::ToFloat),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![num]),
arguments: None,
}
}
/// Create integer "and" (&) operator that is applied to two or more integers.
/// All arguments must resolve to integers.
/// Requires server version 5.6.0+.
/// ```
/// // a & 0xff == 0x11
/// use aerospike::expressions::{eq, int_val, int_and, int_bin};
/// eq(int_and(vec![int_bin("a".to_string()), int_val(0xff)]), int_val(0x11));
/// ```
pub const fn int_and(exps: Vec<FilterExpression>) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::IntAnd),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(exps),
arguments: None,
}
}
/// Create integer "xor" (^) operator that is applied to two or more integers.
/// All arguments must resolve to integers.
/// Requires server version 5.6.0+.
/// ```
/// // a ^ b == 16
/// use aerospike::expressions::{eq, int_val, int_xor, int_bin};
/// eq(int_xor(vec![int_bin("a".to_string()), int_bin("b".to_string())]), int_val(16));
/// ```
pub const fn int_xor(exps: Vec<FilterExpression>) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::IntXor),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(exps),
arguments: None,
}
}
/// Create integer "not" (~) operator.
/// Requires server version 5.6.0+.
/// ```
/// // ~a == 7
/// use aerospike::expressions::{eq, int_val, int_not, int_bin};
/// eq(int_not(int_bin("a".to_string())), int_val(7));
/// ```
pub fn int_not(exp: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::IntNot),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![exp]),
arguments: None,
}
}
/// Create integer "left shift" (<<) operator.
/// Requires server version 5.6.0+.
/// ```
/// // a << 8 > 0xff
/// use aerospike::expressions::{int_val, int_bin, gt, int_lshift};
/// gt(int_lshift(int_bin("a".to_string()), int_val(8)), int_val(0xff));
/// ```
pub fn int_lshift(value: FilterExpression, shift: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::IntLshift),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![value, shift]),
arguments: None,
}
}
/// Create integer "logical right shift" (>>>) operator.
/// Requires server version 5.6.0+.
/// ```
/// // a >> 8 > 0xff
/// use aerospike::expressions::{int_val, int_bin, gt, int_rshift};
/// gt(int_rshift(int_bin("a".to_string()), int_val(8)), int_val(0xff));
/// ```
pub fn int_rshift(value: FilterExpression, shift: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::IntRshift),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![value, shift]),
arguments: None,
}
}
/// Create integer "arithmetic right shift" (>>) operator.
/// The sign bit is preserved and not shifted.
/// Requires server version 5.6.0+.
/// ```
/// // a >>> 8 > 0xff
/// use aerospike::expressions::{int_val, int_bin, gt, int_arshift};
/// gt(int_arshift(int_bin("a".to_string()), int_val(8)), int_val(0xff));
/// ```
pub fn int_arshift(value: FilterExpression, shift: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::IntARshift),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![value, shift]),
arguments: None,
}
}
/// Create expression that returns count of integer bits that are set to 1.
/// Requires server version 5.6.0+.
/// ```
/// // count(a) == 4
/// use aerospike::expressions::{int_val, int_bin, int_count, eq};
/// eq(int_count(int_bin("a".to_string())), int_val(4));
/// ```
pub fn int_count(exp: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::IntCount),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![exp]),
arguments: None,
}
}
/// Create expression that scans integer bits from left (most significant bit) to
/// right (least significant bit), looking for a search bit value. When the
/// search value is found, the index of that bit (where the most significant bit is
/// index 0) is returned. If "search" is true, the scan will search for the bit
/// value 1. If "search" is false it will search for bit value 0.
/// Requires server version 5.6.0+.
/// ```
/// // lscan(a, true) == 4
/// use aerospike::expressions::{int_val, int_bin, eq, int_lscan, bool_val};
/// eq(int_lscan(int_bin("a".to_string()), bool_val(true)), int_val(4));
/// ```
pub fn int_lscan(value: FilterExpression, search: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::IntLscan),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![value, search]),
arguments: None,
}
}
/// Create expression that scans integer bits from right (least significant bit) to
/// left (most significant bit), looking for a search bit value. When the
/// search value is found, the index of that bit (where the most significant bit is
/// index 0) is returned. If "search" is true, the scan will search for the bit
/// value 1. If "search" is false it will search for bit value 0.
/// Requires server version 5.6.0+.
/// ```
/// // rscan(a, true) == 4
/// use aerospike::expressions::{int_val, int_bin, eq, int_rscan, bool_val};
/// eq(int_rscan(int_bin("a".to_string()), bool_val(true)), int_val(4));
/// ```
pub fn int_rscan(value: FilterExpression, search: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::IntRscan),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(vec![value, search]),
arguments: None,
}
}
/// Create expression that returns the minimum value in a variable number of expressions.
/// All arguments must be the same type (integer or float).
/// Requires server version 5.6.0+.
/// ```
/// // min(a, b, c) > 0
/// use aerospike::expressions::{int_val, int_bin, gt, min};
/// gt(min(vec![int_bin("a".to_string()),int_bin("b".to_string()),int_bin("c".to_string())]), int_val(0));
/// ```
pub const fn min(exps: Vec<FilterExpression>) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Min),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(exps),
arguments: None,
}
}
/// Create expression that returns the maximum value in a variable number of expressions.
/// All arguments must be the same type (integer or float).
/// Requires server version 5.6.0+.
/// ```
/// // max(a, b, c) > 100
/// use aerospike::expressions::{int_val, int_bin, gt, max};
/// gt(max(vec![int_bin("a".to_string()),int_bin("b".to_string()),int_bin("c".to_string())]), int_val(100));
/// ```
pub const fn max(exps: Vec<FilterExpression>) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Max),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(exps),
arguments: None,
}
}
//--------------------------------------------------
// Variables
//--------------------------------------------------
/// Conditionally select an expression from a variable number of expression pairs
/// followed by default expression action.
/// Requires server version 5.6.0+.
/// ```
/// // Args Format: bool exp1, action exp1, bool exp2, action exp2, ..., action-default
/// // Apply operator based on type.
///
/// use aerospike::expressions::{cond, int_bin, eq, int_val, num_add, num_sub, num_mul};
/// cond(
/// vec![
/// eq(int_bin("type".to_string()), int_val(0)), num_add(vec![int_bin("val1".to_string()), int_bin("val2".to_string())]),
/// eq(int_bin("type".to_string()), int_val(1)), num_sub(vec![int_bin("val1".to_string()), int_bin("val2".to_string())]),
/// eq(int_bin("type".to_string()), int_val(2)), num_mul(vec![int_bin("val1".to_string()), int_bin("val2".to_string())]),
/// int_val(-1)
/// ]
/// );
/// ```
pub const fn cond(exps: Vec<FilterExpression>) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Cond),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(exps),
arguments: None,
}
}
/// Define variables and expressions in scope.
/// Requires server version 5.6.0+.
/// ```
/// // 5 < a < 10
/// use aerospike::expressions::{exp_let, def, int_bin, and, lt, int_val, var};
/// exp_let(
/// vec![
/// def("x".to_string(), int_bin("a".to_string())),
/// and(vec![
/// lt(int_val(5), var("x".to_string()),),
/// lt(var("x".to_string()), int_val(10))
/// ])
/// ]
/// );
/// ```
pub const fn exp_let(exps: Vec<FilterExpression>) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Let),
val: None,
bin: None,
flags: None,
module: None,
exps: Some(exps),
arguments: None,
}
}
/// Assign variable to an expression that can be accessed later.
/// Requires server version 5.6.0+.
/// ```
/// // 5 < a < 10
/// use aerospike::expressions::{exp_let, def, int_bin, and, lt, int_val, var};
/// exp_let(
/// vec![
/// def("x".to_string(), int_bin("a".to_string())),
/// and(vec![
/// lt(int_val(5), var("x".to_string()),),
/// lt(var("x".to_string()), int_val(10))
/// ])
/// ]
/// );
/// ```
pub fn def(name: String, value: FilterExpression) -> FilterExpression {
FilterExpression {
cmd: None,
val: Some(Value::from(name)),
bin: None,
flags: None,
module: None,
exps: Some(vec![value]),
arguments: None,
}
}
/// Retrieve expression value from a variable.
/// Requires server version 5.6.0+.
pub fn var(name: String) -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Var),
val: Some(Value::from(name)),
bin: None,
flags: None,
module: None,
exps: None,
arguments: None,
}
}
/// Create unknown value. Used to intentionally fail an expression.
/// The failure can be ignored with `ExpWriteFlags` `EVAL_NO_FAIL`
/// or `ExpReadFlags` `EVAL_NO_FAIL`.
/// Requires server version 5.6.0+.
///
/// ```
/// // double v = balance - 100.0;
/// // return (v > 0.0)? v : unknown;
/// use aerospike::expressions::{exp_let, def, num_sub, float_bin, float_val, cond, ge, var, unknown};
/// exp_let(
/// vec![
/// def("v".to_string(), num_sub(vec![float_bin("balance".to_string()), float_val(100.0)])),
/// cond(vec![ge(var("v".to_string()), float_val(0.0)), var("v".to_string())]),
/// unknown()
/// ]
/// );
/// ```
pub const fn unknown() -> FilterExpression {
FilterExpression {
cmd: Some(ExpOp::Unknown),
val: None,
bin: None,
flags: None,
module: None,
exps: None,
arguments: None,
}
}