json type

cozo-core/src/cozoscript.pest

@@ -114,7 +114,9 @@ unary_op = _{ minus | negate }
 minus = { "-" }
 negate = { "!" }
 
-term = _{ literal | param | grouping | apply | var | list }
+term = _{ literal | param | grouping | apply | var | list | object }
+object = { "{" ~ (object_pair ~ ",")* ~ object_pair? ~ "}" }
+object_pair = {expr ~ ":" ~ expr}
 list = { "[" ~ (expr ~ ",")* ~ expr? ~ "]" }
 grouping = { "(" ~ expr ~ ")" }
 
@@ -197,7 +199,10 @@ literal = _{ null | boolean | number | string}
 table_schema = {"{" ~ table_cols ~ ("=>" ~ table_cols)? ~ "}"}
 table_cols = {(table_col ~ ",")* ~ table_col?}
 table_col = {ident ~ (":" ~ col_type)? ~ (("default" ~ expr) | ("=" ~ out_arg))?}
-col_type = {(any_type | bool_type | int_type | float_type | string_type | bytes_type | uuid_type | validity_type | vec_type | list_type | tuple_type) ~ "?"?}
+col_type = {(
+    any_type | bool_type | int_type | float_type | string_type |
+    bytes_type | uuid_type | validity_type | vec_type |
+    json_type | list_type | tuple_type) ~ "?"?}
 col_type_with_term = {SOI ~ col_type ~ EOI}
 any_type = {"Any"}
 int_type = {"Int"}
@@ -206,6 +211,7 @@ string_type = {"String"}
 bytes_type = {"Bytes"}
 uuid_type = {"Uuid"}
 bool_type = {"Bool"}
+json_type = {"Json"}
 validity_type = {"Validity"}
 list_type = {"[" ~ col_type ~ (";" ~ expr)? ~ "]"}
 tuple_type = {"(" ~ (col_type ~ ",")* ~ col_type? ~ ")"}

cozo-core/src/data/functions.rs

@@ -21,6 +21,7 @@ use js_sys::Date;
 use miette::{bail, ensure, miette, Result};
 use num_traits::FloatConst;
 use rand::prelude::*;
+use serde_json::Value;
 use smartstring::SmartString;
 use unicode_normalization::UnicodeNormalization;
 use uuid::v1::Timestamp;
@@ -1602,6 +1603,14 @@ pub(crate) fn op_to_bool(args: &[DataValue]) -> Result<DataValue> {
         DataValue::Vec(_) => true,
         DataValue::Validity(vld) => vld.is_assert.0,
         DataValue::Bot => false,
+        DataValue::Json(json) => match &json.0 {
+            Value::Null => false,
+            Value::Bool(b) => *b,
+            Value::Number(n) => n.as_i64() != Some(0),
+            Value::String(s) => !s.is_empty(),
+            Value::Array(a) => !a.is_empty(),
+            Value::Object(o) => !o.is_empty(),
+        },
     }))
 }
 
@@ -1620,6 +1629,14 @@ pub(crate) fn op_to_unity(args: &[DataValue]) -> Result<DataValue> {
         DataValue::Vec(_) => 1,
         DataValue::Validity(vld) => i64::from(vld.is_assert.0),
         DataValue::Bot => 0,
+        DataValue::Json(json) => match &json.0 {
+            Value::Null => 0,
+            Value::Bool(b) => *b as i64,
+            Value::Number(n) => (n.as_i64() != Some(0)) as i64,
+            Value::String(s) => !s.is_empty() as i64,
+            Value::Array(a) => !a.is_empty() as i64,
+            Value::Object(o) => !o.is_empty() as i64,
+        },
     }))
 }
 

cozo-core/src/data/json.rs

@@ -11,7 +11,7 @@ use base64::Engine;
 use serde_json::json;
 pub(crate) use serde_json::Value as JsonValue;
 
-use crate::data::value::{Vector, DataValue, Num};
+use crate::data::value::{DataValue, Num, Vector};
 
 impl From<JsonValue> for DataValue {
     fn from(v: JsonValue) -> Self {
@@ -97,15 +97,14 @@ impl From<DataValue> for JsonValue {
             DataValue::Uuid(u) => {
                 json!(u.0)
             }
-            DataValue::Vec(arr) => {
-                match arr {
+            DataValue::Vec(arr) => match arr {
                 Vector::F32(a) => json!(a.as_slice().unwrap()),
                 Vector::F64(a) => json!(a.as_slice().unwrap()),
-                }
-            }
+            },
             DataValue::Validity(v) => {
                 json!([v.timestamp.0, v.is_assert])
             }
+            DataValue::Json(j) => j.0,
         }
     }
 }

cozo-core/src/data/memcmp.rs

@@ -14,7 +14,9 @@ use std::str::FromStr;
 use byteorder::{BigEndian, ByteOrder, WriteBytesExt};
 use regex::Regex;
 
-use crate::data::value::{Vector, DataValue, Num, RegexWrapper, UuidWrapper, Validity, ValidityTs};
+use crate::data::value::{
+    DataValue, JsonData, Num, RegexWrapper, UuidWrapper, Validity, ValidityTs, Vector,
+};
 
 const INIT_TAG: u8 = 0x00;
 const NULL_TAG: u8 = 0x01;
@@ -29,6 +31,7 @@ const REGEX_TAG: u8 = 0x09;
 const LIST_TAG: u8 = 0x0A;
 const SET_TAG: u8 = 0x0B;
 const VLD_TAG: u8 = 0x0C;
+const JSON_TAG: u8 = 0x0D;
 const BOT_TAG: u8 = 0xFF;
 
 const VEC_F32: u8 = 0x01;
@@ -74,6 +77,11 @@ pub(crate) trait MemCmpEncoder: Write {
                 self.write_u8(STR_TAG).unwrap();
                 self.encode_bytes(s.as_bytes());
             }
+            DataValue::Json(j) => {
+                self.write_u8(JSON_TAG).unwrap();
+                let s = j.0.to_string();
+                self.encode_bytes(s.as_bytes());
+            }
             DataValue::Bytes(b) => {
                 self.write_u8(BYTES_TAG).unwrap();
                 self.encode_bytes(b)
@@ -262,6 +270,13 @@ impl DataValue {
                 let s = unsafe { String::from_utf8_unchecked(bytes) };
                 (DataValue::Str(s.into()), remaining)
             }
+            JSON_TAG => {
+                let (bytes, remaining) = decode_bytes(remaining);
+                (
+                    DataValue::Json(JsonData(serde_json::from_slice(&bytes).unwrap())),
+                    remaining,
+                )
+            }
             BYTES_TAG => {
                 let (bytes, remaining) = decode_bytes(remaining);
                 (DataValue::Bytes(bytes), remaining)
@@ -345,7 +360,7 @@ impl DataValue {
                         }
                         (DataValue::Vec(Vector::F64(res_arr)), rest)
                     }
-                    _ => unreachable!()
+                    _ => unreachable!(),
                 }
             }
             _ => unreachable!("{:?}", bs),

cozo-core/src/data/relation.rs

@@ -15,11 +15,13 @@ use base64::Engine;
 use chrono::DateTime;
 use itertools::Itertools;
 use miette::{bail, ensure, Diagnostic, Result};
+use serde_json::json;
 use smartstring::{LazyCompact, SmartString};
 use thiserror::Error;
 
 use crate::data::expr::Expr;
-use crate::data::value::{DataValue, UuidWrapper, Validity, ValidityTs, Vector};
+use crate::data::value::{DataValue, JsonData, UuidWrapper, Validity, ValidityTs, Vector};
+use crate::Num;
 
 #[derive(Debug, Clone, Eq, PartialEq, serde_derive::Deserialize, serde_derive::Serialize)]
 pub struct NullableColType {
@@ -66,6 +68,9 @@ impl Display for NullableColType {
                 write!(f, ";{len}")?;
                 f.write_str(">")?;
             }
+            ColType::Json => {
+                f.write_str("Json")?;
+            }
         }
         if self.nullable {
             f.write_str("?")?;
@@ -93,9 +98,12 @@ pub enum ColType {
     },
     Tuple(Vec<NullableColType>),
     Validity,
+    Json,
 }
 
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash, serde_derive::Deserialize, serde_derive::Serialize)]
+#[derive(
+    Debug, Copy, Clone, Eq, PartialEq, Hash, serde_derive::Deserialize, serde_derive::Serialize,
+)]
 pub enum VecElementType {
     F32,
     F64,
@@ -242,8 +250,7 @@ impl NullableColType {
                     bail!(make_err())
                 }
             }
-            ColType::Vec { eltype, len } => {
-                match &data {
+            ColType::Vec { eltype, len } => match &data {
                 DataValue::List(l) => {
                     if l.len() != *len {
                         bail!(BadListLength(self.clone(), l.len()))
@@ -251,7 +258,9 @@ impl NullableColType {
                     match eltype {
                         VecElementType::F32 => {
                             let mut res_arr = ndarray::Array1::zeros(*len);
-                                for (mut row, el) in res_arr.axis_iter_mut(ndarray::Axis(0)).zip(l.iter()) {
+                            for (mut row, el) in
+                                res_arr.axis_iter_mut(ndarray::Axis(0)).zip(l.iter())
+                            {
                                 let f = el.get_float().ok_or_else(make_err)? as f32;
                                 row.fill(f);
                             }
@@ -259,7 +268,9 @@ impl NullableColType {
                         }
                         VecElementType::F64 => {
                             let mut res_arr = ndarray::Array1::zeros(*len);
-                                for (mut row, el) in res_arr.axis_iter_mut(ndarray::Axis(0)).zip(l.iter()) {
+                            for (mut row, el) in
+                                res_arr.axis_iter_mut(ndarray::Axis(0)).zip(l.iter())
+                            {
                                 let f = el.get_float().ok_or_else(make_err)?;
                                 row.fill(f);
                             }
@@ -275,8 +286,7 @@ impl NullableColType {
                     }
                 }
                 _ => bail!(make_err()),
-                }
-            }
+            },
             ColType::Tuple(typ) => {
                 if let DataValue::List(l) = data {
                     ensure!(typ.len() == l.len(), BadListLength(self.clone(), l.len()));
@@ -347,6 +357,71 @@ impl NullableColType {
                     v => bail!(InvalidValidity(v)),
                 }
             }
+            ColType::Json => DataValue::Json(JsonData(match data {
+                DataValue::Null => {
+                    json!(null)
+                }
+                DataValue::Bool(b) => {
+                    json!(b)
+                }
+                DataValue::Num(n) => match n {
+                    Num::Int(i) => {
+                        json!(i)
+                    }
+                    Num::Float(f) => {
+                        json!(f)
+                    }
+                },
+                DataValue::Str(s) => {
+                    json!(s)
+                }
+                DataValue::Bytes(b) => {
+                    json!(b)
+                }
+                DataValue::Uuid(u) => {
+                    json!(u.0.as_bytes())
+                }
+                DataValue::Regex(r) => {
+                    json!(r.0.as_str())
+                }
+                DataValue::List(l) => {
+                    let mut arr = Vec::with_capacity(l.len());
+                    for el in l {
+                        arr.push(self.coerce(el, cur_vld)?);
+                    }
+                    arr.into()
+                }
+                DataValue::Set(l) => {
+                    let mut arr = Vec::with_capacity(l.len());
+                    for el in l {
+                        arr.push(self.coerce(el, cur_vld)?);
+                    }
+                    arr.into()
+                }
+                DataValue::Vec(v) => {
+                    let mut arr = Vec::with_capacity(v.len());
+                    match v {
+                        Vector::F32(a) => {
+                            for el in a {
+                                arr.push(json!(el));
+                            }
+                        }
+                        Vector::F64(a) => {
+                            for el in a {
+                                arr.push(json!(el));
+                            }
+                        }
+                    }
+                    arr.into()
+                }
+                DataValue::Json(j) => j.0,
+                DataValue::Validity(vld) => {
+                    json!([vld.timestamp.0, vld.is_assert.0])
+                }
+                DataValue::Bot => {
+                    json!(null)
+                }
+            })),
         })
     }
 }

cozo-core/src/data/value.rs

@@ -13,7 +13,9 @@ use std::cmp::{Ordering, Reverse};
 use std::collections::BTreeSet;
 use std::fmt::{Debug, Display, Formatter};
 use std::hash::{Hash, Hasher};
+use std::ops::Deref;
 
+use crate::data::json::JsonValue;
 use crate::data::relation::VecElementType;
 use ordered_float::OrderedFloat;
 use regex::Regex;
@@ -154,12 +156,43 @@ pub enum DataValue {
     Set(BTreeSet<DataValue>),
     /// Array, mainly for proximity search
     Vec(Vector),
+    /// Json
+    Json(JsonData),
     /// validity,
     Validity(Validity),
     /// bottom type, used internally only
     Bot,
 }
 
+#[derive(Clone, PartialEq, Eq, serde_derive::Deserialize, serde_derive::Serialize)]
+pub struct JsonData(pub JsonValue);
+
+impl PartialOrd<Self> for JsonData {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+impl Ord for JsonData {
+    fn cmp(&self, other: &Self) -> Ordering {
+        self.0.to_string().cmp(&other.0.to_string())
+    }
+}
+
+impl Deref for JsonData {
+    type Target = JsonValue;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl Hash for JsonData {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.0.to_string().hash(state)
+    }
+}
+
 /// Vector of floating numbers
 #[derive(Debug, Clone)]
 pub enum Vector {
@@ -573,6 +606,9 @@ impl Display for DataValue {
                     write!(f, "vec({:?}, \"F64\")", a.to_vec())
                 }
             },
+            DataValue::Json(j) => {
+                write!(f, "json({})", j.0)
+            }
         }
     }
 }