feat: introduce SetIndexes and UnsetIndexes (#253)

proto/greptime/v1/ddl.proto

@@ -112,9 +112,13 @@ message AlterTableExpr {
     ModifyColumnTypes modify_column_types = 7;
     SetTableOptions set_table_options = 8;
     UnsetTableOptions unset_table_options = 11;
+    // Deprecated: use set_indexes instead.
     SetIndex set_index = 12;
+    // Deprecated: use unset_indexes instead.
     UnsetIndex unset_index = 13;
     DropDefaults drop_defaults = 14;
+    SetIndexes set_indexes = 15;
+    UnsetIndexes unset_indexes = 16;
   }
 }
 
@@ -122,6 +126,14 @@ message DropDefault {
   string column_name = 1;
 }
 
+message SetIndexes {
+  repeated SetIndex set_indexes = 1;
+}
+
+message UnsetIndexes {
+  repeated UnsetIndex unset_indexes = 1;
+}
+
 message SetIndex {
   oneof options {
     SetFulltext fulltext = 1;

proto/greptime/v1/region/server.proto

@@ -158,9 +158,13 @@ message AlterRequest {
     ModifyColumnTypes modify_column_types = 5;
     SetTableOptions set_table_options = 6;
     UnsetTableOptions unset_table_options = 9;
+    // Deprecated: use set_indexes instead.
     SetIndex set_index = 10;
+    // Deprecated: use unset_indexes instead.
     UnsetIndex unset_index = 11;
     DropDefaults drop_defaults = 12;
+    SetIndexes set_indexes = 13;
+    UnsetIndexes unset_indexes = 14;
   }
   // The version of the schema before applying the alteration.
   uint64 schema_version = 4;