feat(expr): add json path functions

proto/expr.proto

@@ -253,6 +253,10 @@ message ExprNode {
     TO_JSONB = 617;
     JSONB_BUILD_ARRAY = 618;
     JSONB_BUILD_OBJECT = 619;
+    JSONB_PATH_EXISTS = 620;
+    JSONB_PATH_MATCH = 621;
+    JSONB_PATH_QUERY_ARRAY = 622;
+    JSONB_PATH_QUERY_FIRST = 623;
 
     // Non-pure functions below (> 1000)
     // ------------------------
@@ -295,6 +299,7 @@ message TableFunction {
     JSONB_EACH = 12;
     JSONB_EACH_TEXT = 13;
     JSONB_OBJECT_KEYS = 14;
+    JSONB_PATH_QUERY = 15;
     // User defined table function
     UDTF = 100;
   }

src/common/src/types/jsonb.rs

@@ -235,9 +235,14 @@ impl<'a> JsonbRef<'a> {
         buf
     }
 
+    /// Returns a jsonb `null` value.
+    pub fn null() -> Self {
+        Self(ValueRef::Null)
+    }
+
     /// Returns true if this is a jsonb `null`.
     pub fn is_jsonb_null(&self) -> bool {
-        self.0.as_null().is_some()
+        self.0.is_null()
     }
 
     /// Returns true if this is a jsonb null, boolean, number or string.
@@ -250,12 +255,12 @@ impl<'a> JsonbRef<'a> {
 
     /// Returns true if this is a jsonb array.
     pub fn is_array(&self) -> bool {
-        matches!(self.0, ValueRef::Array(_))
+        self.0.is_array()
     }
 
     /// Returns true if this is a jsonb object.
     pub fn is_object(&self) -> bool {
-        matches!(self.0, ValueRef::Object(_))
+        self.0.is_object()
     }
 
     /// Returns the type name of this jsonb.

src/expr/impl/Cargo.toml

@@ -42,9 +42,13 @@ serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 sha1 = "0.10"
 sha2 = "0.10"
+sql-json-path = { git = "https://github.com/risingwavelabs/sql-json-path.git", rev = "95a06aa", features = [
+    "jsonbb",
+] }
 thiserror = "1"
 tokio = { version = "0.2", package = "madsim-tokio", features = ["time"] }
 tracing = "0.1"
+# sql-json-path = { path = "../../../../sql-json-path", features = ["jsonbb"] }
 
 [target.'cfg(not(madsim))'.dependencies]
 workspace-hack = { path = "../../workspace-hack" }