clickhouse-cpp scanner

Author: lmangani

.gitmodules

@@ -8,3 +8,6 @@
 	url = https://github.com/duckdb/extension-ci-tools
 	branch = main
 	update = merge
+[submodule "contribs/clickhouse-cpp"]
+	path = contribs/clickhouse-cpp
+	url = https://github.com/ClickHouse/clickhouse-cpp.git

chsql/CMakeLists.txt

@@ -1,34 +1,70 @@
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.12)
+
 # Set extension name here
 set(TARGET_NAME chsql)
-# DuckDB's extension distribution supports vcpkg. As such, dependencies can be added in ./vcpkg.json and then
-# used in cmake with find_package. Feel free to remove or replace with other dependencies.
-# Note that it should also be removed from vcpkg.json to prevent needlessly installing it..
+
+project(${TARGET_NAME})
+
+# Configure clickhouse-cpp options
+set(CH_CPP_BUILD_SHARED OFF CACHE BOOL "Build shared library")
+set(CH_CPP_BUILD_STATICALY_LINKED_LIB ON CACHE BOOL "Build static library")
+set(CH_CPP_BUILD_ONLY_LIB ON CACHE BOOL "Build only library")
+set(CH_CPP_WITH_OPENSSL ON CACHE BOOL "Use OpenSSL")
+
+# Add clickhouse-cpp
+add_subdirectory(
+    ${CMAKE_CURRENT_SOURCE_DIR}/../contribs/clickhouse-cpp
+    ${CMAKE_CURRENT_BINARY_DIR}/clickhouse-cpp
+    EXCLUDE_FROM_ALL
+)
+
+# Find OpenSSL package
 find_package(OpenSSL REQUIRED)
+
 set(EXTENSION_NAME ${TARGET_NAME}_extension)
 set(LOADABLE_EXTENSION_NAME ${TARGET_NAME}_loadable_extension)
-project(${TARGET_NAME})
 
 include_directories(
-        ./src/include
-        ./src
-        ${CMAKE_CURRENT_SOURCE_DIR}/../duckdb/extension/parquet/include
-        ../duckdb/third_party/lz4
-        ../duckdb/third_party/parquet
-        ../duckdb/third_party/thrift
-        ../duckdb/third_party/snappy
-        ../duckdb/third_party/zstd/include
-        ../duckdb/third_party/mbedtls
-        ../duckdb/third_party/mbedtls/include
-        ../duckdb/third_party/brotli/include)
-set(EXTENSION_SOURCES src/chsql_extension.cpp src/duck_flock.cpp)
+    ./src/include
+    ./src
+    ${CMAKE_CURRENT_SOURCE_DIR}/../duckdb/extension/parquet/include
+    ../duckdb/third_party/lz4
+    ../duckdb/third_party/parquet
+    ../duckdb/third_party/thrift
+    ../duckdb/third_party/snappy
+    ../duckdb/third_party/zstd/include
+    ../duckdb/third_party/mbedtls
+    ../duckdb/third_party/mbedtls/include
+    ../duckdb/third_party/brotli/include
+    ${CMAKE_CURRENT_SOURCE_DIR}/../contribs/clickhouse-cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/../contribs/clickhouse-cpp/contrib/absl
+)
+
+# Update extension sources to include new file
+set(EXTENSION_SOURCES 
+    src/chsql_extension.cpp 
+    src/duck_flock.cpp
+    src/clickhouse_scan.cpp
+)
+
 build_static_extension(${TARGET_NAME} ${EXTENSION_SOURCES})
 build_loadable_extension(${TARGET_NAME} " " ${EXTENSION_SOURCES})
-# Link OpenSSL in both the static library as the loadable extension
-target_link_libraries(${EXTENSION_NAME} OpenSSL::SSL OpenSSL::Crypto)
-target_link_libraries(${LOADABLE_EXTENSION_NAME} OpenSSL::SSL OpenSSL::Crypto)
+
+# Link libraries using plain signature
+target_link_libraries(${EXTENSION_NAME} OpenSSL::SSL OpenSSL::Crypto clickhouse-cpp-lib)
+target_link_libraries(${LOADABLE_EXTENSION_NAME} OpenSSL::SSL OpenSSL::Crypto clickhouse-cpp-lib)
+
+# Install targets
 install(
-        TARGETS ${EXTENSION_NAME}
-        EXPORT "${DUCKDB_EXPORT_SET}"
-        LIBRARY DESTINATION "${INSTALL_LIB_DIR}"
-        ARCHIVE DESTINATION "${INSTALL_LIB_DIR}")
+    TARGETS ${EXTENSION_NAME} clickhouse-cpp-lib
+    EXPORT "${DUCKDB_EXPORT_SET}"
+    LIBRARY DESTINATION "${INSTALL_LIB_DIR}"
+    ARCHIVE DESTINATION "${INSTALL_LIB_DIR}"
+)
+
+# Make sure the export set includes clickhouse-cpp-lib
+export(
+    TARGETS ${EXTENSION_NAME} clickhouse-cpp-lib
+    NAMESPACE duckdb::
+    FILE DuckDBExports.cmake
+)