tunning len hints

wlqm · wlqm · commit fc1e87e32863 · 2025-12-03T14:11:49.000+08:00
diff --git a/core/Cargo.toml b/core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "vsdb_core"
-version = "6.0.0"
+version = "6.0.1"
 authors = ["hui.fan@mail.ru"]
 edition = "2024"
 description = "A std-collection-like database"
diff --git a/core/src/common/engines/parity_backend.rs b/core/src/common/engines/parity_backend.rs
@@ -268,10 +268,11 @@ impl Engine for ParityEngine {
     }
 
     fn get_instance_len_hint(&self, instance_prefix: PreBytes) -> u64 {
-        crate::parse_int!(
-            self.hdr.get(META_COLID, &instance_prefix).unwrap().unwrap(),
-            u64
-        )
+        self.hdr
+            .get(META_COLID, &instance_prefix)
+            .unwrap()
+            .map(|v| crate::parse_int!(v, u64))
+            .unwrap_or(0)
     }
 
     fn set_instance_len_hint(&self, instance_prefix: PreBytes, new_len: u64) {
diff --git a/core/src/common/engines/rocks_backend.rs b/core/src/common/engines/rocks_backend.rs
@@ -258,7 +258,11 @@ impl Engine for RocksEngine {
     }
 
     fn get_instance_len_hint(&self, instance_prefix: PreBytes) -> u64 {
-        crate::parse_int!(self.meta.get(instance_prefix).unwrap().unwrap(), u64)
+        self.meta
+            .get(instance_prefix)
+            .unwrap()
+            .map(|v| crate::parse_int!(v, u64))
+            .unwrap_or(0)
     }
 
     fn set_instance_len_hint(&self, instance_prefix: PreBytes, new_len: u64) {

Original file line number	Diff line number	Diff line change
`@@ -268,10 +268,11 @@ impl Engine for ParityEngine {`
`268`	`268`	`}`
`269`	`269`
`270`	`270`	`fn get_instance_len_hint(&self, instance_prefix: PreBytes) -> u64 {`
`271`		`- crate::parse_int!(`
`272`		`- self.hdr.get(META_COLID, &instance_prefix).unwrap().unwrap(),`
`273`		`- u64`
`274`		`- )`
	`271`	`+ self.hdr`
	`272`	`+ .get(META_COLID, &instance_prefix)`
	`273`	`+ .unwrap()`
	`274`	`+ .map(\|v\| crate::parse_int!(v, u64))`
	`275`	`+ .unwrap_or(0)`
`275`	`276`	`}`
`276`	`277`
`277`	`278`	`fn set_instance_len_hint(&self, instance_prefix: PreBytes, new_len: u64) {`
Original file line number	Diff line number	Diff line change
`@@ -258,7 +258,11 @@ impl Engine for RocksEngine {`
`258`	`258`	`}`
`259`	`259`
`260`	`260`	`fn get_instance_len_hint(&self, instance_prefix: PreBytes) -> u64 {`
`261`		`- crate::parse_int!(self.meta.get(instance_prefix).unwrap().unwrap(), u64)`
	`261`	`+ self.meta`
	`262`	`+ .get(instance_prefix)`
	`263`	`+ .unwrap()`
	`264`	`+ .map(\|v\| crate::parse_int!(v, u64))`
	`265`	`+ .unwrap_or(0)`
`262`	`266`	`}`
`263`	`267`
`264`	`268`	`fn set_instance_len_hint(&self, instance_prefix: PreBytes, new_len: u64) {`