fix: allow physical region alter region options (#5046)

allow physical region alter region options

tests/cases/standalone/common/alter/alter_table_options.result

@@ -281,3 +281,54 @@ DROP TABLE ato;
 
 Affected Rows: 0
 
+CREATE TABLE phy (ts timestamp time index, val double) engine=metric with ("physical_metric_table" = "");
+
+Affected Rows: 0
+
+ALTER TABLE phy set ttl='2years';
+
+Affected Rows: 0
+
+SHOW CREATE TABLE phy;
+
++-------+------------------------------------+
+| Table | Create Table                       |
++-------+------------------------------------+
+| phy   | CREATE TABLE IF NOT EXISTS "phy" ( |
+|       |   "ts" TIMESTAMP(3) NOT NULL,      |
+|       |   "val" DOUBLE NULL,               |
+|       |   TIME INDEX ("ts")                |
+|       | )                                  |
+|       |                                    |
+|       | ENGINE=metric                      |
+|       | WITH(                              |
+|       |   physical_metric_table = '',      |
+|       |   ttl = '2years'                   |
+|       | )                                  |
++-------+------------------------------------+
+
+ALTER TABLE phy UNSET 'ttl';
+
+Affected Rows: 0
+
+SHOW CREATE TABLE phy;
+
++-------+------------------------------------+
+| Table | Create Table                       |
++-------+------------------------------------+
+| phy   | CREATE TABLE IF NOT EXISTS "phy" ( |
+|       |   "ts" TIMESTAMP(3) NOT NULL,      |
+|       |   "val" DOUBLE NULL,               |
+|       |   TIME INDEX ("ts")                |
+|       | )                                  |
+|       |                                    |
+|       | ENGINE=metric                      |
+|       | WITH(                              |
+|       |   physical_metric_table = ''       |
+|       | )                                  |
++-------+------------------------------------+
+
+DROP TABLE phy;
+
+Affected Rows: 0
+

tests/cases/standalone/common/alter/alter_table_options.sql

@@ -60,3 +60,15 @@ SHOW CREATE TABLE ato;
 SHOW CREATE TABLE ato;
 
 DROP TABLE ato;
+
+CREATE TABLE phy (ts timestamp time index, val double) engine=metric with ("physical_metric_table" = "");
+
+ALTER TABLE phy set ttl='2years';
+
+SHOW CREATE TABLE phy;
+
+ALTER TABLE phy UNSET 'ttl';
+
+SHOW CREATE TABLE phy;
+
+DROP TABLE phy;