fix/database-base-ttl:

 Refactor error handling and update documentation comments

 - Update comment to reflect retrieval of schema options instead of metadata
 - Introduce new error type `GetSchemaMetadataSnafu` for schema metadata retrieval failures
 - Implement error handling for schema metadata retrieval in `find_ttl` function

src/common/meta/src/key/schema_metadata_manager.rs

@@ -47,7 +47,7 @@ impl SchemaMetadataManager {
         }
     }
 
-    /// Gets schema metadata by table id.
+    /// Gets schema options by table id.
     pub async fn get_schema_options_by_table_id(
         &self,
         table_id: TableId,

src/mito2/src/compaction.rs

@@ -49,8 +49,8 @@ use crate::compaction::picker::{new_picker, CompactionTask};
 use crate::compaction::task::CompactionTaskImpl;
 use crate::config::MitoConfig;
 use crate::error::{
-    CompactRegionSnafu, Error, RegionClosedSnafu, RegionDroppedSnafu, RegionTruncatedSnafu,
-    RemoteCompactionSnafu, Result, TimeRangePredicateOverflowSnafu,
+    CompactRegionSnafu, Error, GetSchemaMetadataSnafu, RegionClosedSnafu, RegionDroppedSnafu,
+    RegionTruncatedSnafu, RemoteCompactionSnafu, Result, TimeRangePredicateOverflowSnafu,
 };
 use crate::metrics::COMPACTION_STAGE_ELAPSED;
 use crate::read::projection::ProjectionMapper;
@@ -434,6 +434,7 @@ impl PendingCompaction {
     }
 }
 
+/// Finds TTL of table by first examine table options then database options.
 async fn find_ttl(
     table_id: TableId,
     table_ttl: Option<Duration>,
@@ -446,7 +447,7 @@ async fn find_ttl(
     let ttl = schema_metadata_manager
         .get_schema_options_by_table_id(table_id)
         .await
-        .expect("Failed to get table ")
+        .context(GetSchemaMetadataSnafu)?
         .and_then(|options| options.ttl);
     Ok(ttl)
 }

src/mito2/src/error.rs

@@ -870,6 +870,13 @@ pub enum Error {
         #[snafu(implicit)]
         location: Location,
     },
+
+    #[snafu(display("Failed to get schema metadata"))]
+    GetSchemaMetadata {
+        source: common_meta::error::Error,
+        #[snafu(implicit)]
+        location: Location,
+    },
 }
 
 pub type Result<T, E = Error> = std::result::Result<T, E>;
@@ -1002,6 +1009,7 @@ impl ErrorExt for Error {
             | ApplyFulltextIndex { source, .. } => source.status_code(),
             DecodeStats { .. } | StatsNotPresent { .. } => StatusCode::Internal,
             RegionBusy { .. } => StatusCode::RegionBusy,
+            GetSchemaMetadata { source, .. } => source.status_code(),
         }
     }