covering index of btree interior pages (#9)

with sqlite_web_vfs' new .dbi feature as a force multiplier

Author: mlin

CMakeLists.txt

@@ -29,7 +29,7 @@ include_directories(${sqlitecpp_SOURCE_DIR}/include)
 FetchContent_Declare(
     sqlite_web_vfs
     GIT_REPOSITORY  https://github.com/mlin/sqlite_web_vfs.git
-    GIT_TAG         41cc28c
+    GIT_TAG         84a8286
 )
 FetchContent_MakeAvailable(sqlite_web_vfs)
 FetchContent_MakeAvailable(concurrentqueue)

README.md

@@ -17,7 +17,7 @@ Standalone instructions follow.
 Prerequisites:
 
 * C++11 compiler, CMake >= 3.11
-* *Up-to-date* packages for SQLite3 and Zstandard development, e.g. Ubuntu 20.04 `sqlite3 libsqlite3-dev libzstd-dev`
+* *Up-to-date* packages for SQLite3, Zstandard, and libcurl development, e.g. Ubuntu 20.04 `sqlite3 libsqlite3-dev libzstd-dev libcurl4-openssl-dev`
 
 Fetch source code and compile the [SQLite loadable extension](https://www.sqlite.org/loadext.html):