fix: support append-only physical table

src/metric-engine/src/engine/create.rs

@@ -33,6 +33,7 @@ use store_api::metric_engine_consts::{
     METADATA_SCHEMA_VALUE_COLUMN_INDEX, METADATA_SCHEMA_VALUE_COLUMN_NAME,
     PHYSICAL_TABLE_METADATA_KEY,
 };
+use store_api::mito_engine_options::{APPEND_MODE_KEY, TTL_KEY};
 use store_api::region_engine::RegionEngine;
 use store_api::region_request::{AffectedRows, RegionCreateRequest, RegionRequest};
 use store_api::storage::consts::ReservedColumnId;
@@ -426,9 +427,10 @@ impl MetricEngineInner {
         // concat region dir
         let metadata_region_dir = join_dir(&request.region_dir, METADATA_REGION_SUBDIR);
 
-        // remove TTL option
+        // remove TTL and APPEND_MODE option
         let mut options = request.options.clone();
-        options.remove("ttl");
+        options.remove(TTL_KEY);
+        options.remove(APPEND_MODE_KEY);
 
         RegionCreateRequest {
             engine: MITO_ENGINE_NAME.to_string(),

src/store-api/src/mito_engine_options.rs

@@ -21,6 +21,8 @@ use common_wal::options::WAL_OPTIONS_KEY;
 pub const APPEND_MODE_KEY: &str = "append_mode";
 /// Option key for merge mode.
 pub const MERGE_MODE_KEY: &str = "merge_mode";
+/// Option key for TTL(time-to-live)
+pub const TTL_KEY: &str = "ttl";
 
 /// Returns true if the `key` is a valid option key for the mito engine.
 pub fn is_mito_engine_option_key(key: &str) -> bool {

tests/cases/standalone/common/create/create_metric_table.result

@@ -169,3 +169,53 @@ DROP TABLE `auT`;
 
 Affected Rows: 0
 
+-- append-only metric table
+CREATE TABLE
+  phy (ts timestamp time index, val double) engine = metric
+with
+(
+  "physical_metric_table" = "",
+  "append_mode" = "true"
+);
+
+Affected Rows: 0
+
+CREATE TABLE t1(ts timestamp time index, val double, host string primary key) engine=metric with ("on_physical_table" = "phy");
+
+Affected Rows: 0
+
+INSERT INTO t1 (ts, val, host) VALUES 
+  ('2022-01-01 00:00:00', 1.23, 'example.com'),
+  ('2022-01-02 00:00:00', 4.56, 'example.com'),
+  ('2022-01-03 00:00:00', 7.89, 'example.com'),
+  ('2022-01-01 00:00:00', 1.23, 'example.com'),
+  ('2022-01-02 00:00:00', 4.56, 'example.com'),
+  ('2022-01-03 00:00:00', 7.89, 'example.com');
+
+Affected Rows: 6
+
+SELECT * FROM t1;
+
++-------------+---------------------+------+
+| host        | ts                  | val  |
++-------------+---------------------+------+
+| example.com | 2022-01-01T00:00:00 | 1.23 |
+| example.com | 2022-01-01T00:00:00 | 1.23 |
+| example.com | 2022-01-02T00:00:00 | 4.56 |
+| example.com | 2022-01-02T00:00:00 | 4.56 |
+| example.com | 2022-01-03T00:00:00 | 7.89 |
+| example.com | 2022-01-03T00:00:00 | 7.89 |
++-------------+---------------------+------+
+
+DROP TABLE t1;
+
+Affected Rows: 0
+
+DESC TABLE t1;
+
+Error: 4001(TableNotFound), Table not found: t1
+
+DROP TABLE phy;
+
+Affected Rows: 0
+

tests/cases/standalone/common/create/create_metric_table.sql

@@ -59,3 +59,30 @@ CREATE TABLE `auT`(
 DESC TABLE `auT`;
 
 DROP TABLE `auT`;
+
+-- append-only metric table
+CREATE TABLE
+  phy (ts timestamp time index, val double) engine = metric
+with
+(
+  "physical_metric_table" = "",
+  "append_mode" = "true"
+);
+
+CREATE TABLE t1(ts timestamp time index, val double, host string primary key) engine=metric with ("on_physical_table" = "phy");
+
+INSERT INTO t1 (ts, val, host) VALUES 
+  ('2022-01-01 00:00:00', 1.23, 'example.com'),
+  ('2022-01-02 00:00:00', 4.56, 'example.com'),
+  ('2022-01-03 00:00:00', 7.89, 'example.com'),
+  ('2022-01-01 00:00:00', 1.23, 'example.com'),
+  ('2022-01-02 00:00:00', 4.56, 'example.com'),
+  ('2022-01-03 00:00:00', 7.89, 'example.com');
+
+SELECT * FROM t1;
+
+DROP TABLE t1;
+
+DESC TABLE t1;
+
+DROP TABLE phy;