[CP] Fix global index issues: after drop/truncate partition, global index can not rereplicate

src/rootserver/ob_balance_info.h

@@ -1229,9 +1229,7 @@ int TenantBalanceStat::fill_partition_entity(const uint64_t schema_id, const SCH
   } else if (OB_FAIL(build_readonly_at_all_info(schema_id, schema))) {
     RS_LOG(WARN, "fail to build readonly at all info", K(ret), K(schema_id));
   } else {
-    bool can_do_rereplicate =
-        !schema.is_global_index_table() || (schema.is_global_index_table() && schema.can_read_index()) ||
-        (schema.is_global_index_table() && schema.is_mock_global_index_invalid() && !schema.can_read_index());
+    bool can_do_rereplicate = !schema.is_global_index_table() || schema.can_rereplicate_global_index_table();
     share::ObPartitionInfo info;
     int64_t partition_idx = OB_INVALID_INDEX;
     bool check_dropped_partition = true;

src/share/schema/ob_schema_struct.cpp

@@ -7743,6 +7743,12 @@ const char* ob_view_check_option_str(const ViewCheckOption option)
   return ret;
 }
 
+bool can_rereplicate_index_status(const ObIndexStatus &idst)
+{
+  // unusable index can also rereplicate
+  return INDEX_STATUS_AVAILABLE == idst || INDEX_STATUS_UNUSABLE == idst;
+}
+
 const char* ob_index_status_str(ObIndexStatus status)
 {
   const char* ret = "invalid";

src/share/schema/ob_schema_struct.h

@@ -247,6 +247,8 @@ enum ObIndexStatus {
   INDEX_STATUS_MAX = 8,
 };
 
+bool can_rereplicate_index_status(const ObIndexStatus &idst);
+
 enum ObPartitionStatus {
   PARTITION_STATUS_INVALID = -1,
   PARTITION_STATUS_ACTIVE = 0,
@@ -3267,6 +3269,10 @@ public:
   {
     return true;
   }
+  inline bool can_rereplicate_global_index_table() const
+  {
+    return true;
+  }
 
   DECLARE_VIRTUAL_TO_STRING;
 

src/share/schema/ob_table_schema.h

@@ -639,6 +639,13 @@ public:
   {
     return INDEX_STATUS_AVAILABLE == index_status && !is_dropped_schema;
   }
+  inline bool can_rereplicate_global_index_table() const
+  {
+    // 1. index which can rereplicate
+    // 2. is mocked invalid for standby cluster
+    return is_global_index_table() && !is_dropped_schema() &&
+           (can_rereplicate_index_status(index_status_) || is_mock_global_index_invalid());
+  }
   inline bool is_final_invalid_index() const;
   inline void set_index_status(const ObIndexStatus index_status)
   {