Postgres Heap Scan

* Switched from CMake to native Postgres build based on make. Debug version can be
  compiled with `QUACK_BUILD=Debug make` command. Otherwise release will be built.
* Multi-thread scan support. Number of threads per query can be set via
  `quack.max_threads_per_query` GUC variable (default is 1 thread).
* Added basic regression test

.github/workflows/build_and_test.yaml

@@ -0,0 +1,57 @@
+name: pg_quack Build and Test
+on:
+  push:
+  pull_request:
+jobs:
+  build-and-test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        version: [REL_16_STABLE]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Test details
+        run: echo Build and test pg_quack on ${{ matrix.os }} with PostgreSQL ${{ matrix.version }} branch
+
+      - name: Checkout and build PostgreSQL code
+        run: |
+          sudo apt-get update -qq
+          sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E298A3A825C0D65DFD57CBB651716619E084DAB9
+          sudo apt-get install -y build-essential libreadline-dev zlib1g-dev flex bison libxml2-dev libxslt-dev libssl-dev libxml2-utils xsltproc ccache pkg-config libc++-dev libc++abi-dev libglib2.0-dev libtinfo5 cmake libstdc++-12-dev
+          rm -rf postgres
+          git clone --branch ${{ matrix.version }} --single-branch --depth 1 https://github.com/postgres/postgres.git
+          pushd postgres
+          git branch
+          ./configure --prefix=$PWD/inst/  --enable-cassert --enable-debug --with-openssl
+          make -j4 install
+
+      - name: Start Postgres
+        run: |
+          pushd postgres
+          cd inst/bin
+          ./initdb -D data
+          ./pg_ctl -D data -l logfile start
+          popd
+
+      - name: Checkout pg_quack extension code
+        uses: actions/checkout@v4
+        with:
+          path: quack
+
+      - name: Build and test pg_quack extension
+        id: regression-tests
+        run: |
+          export PATH="${PWD}/postgres/inst/bin:$PATH"
+          pushd quack
+          git submodule update --init --recursive
+          make
+          make install
+          make installcheck
+          popd
+
+      - name: Print regression.diffs if regression tests failed
+        if: failure() && steps.regression-tests.outcome != 'success'
+        run: |
+          cat quack/regression.diffs

.gitignore

@@ -5,12 +5,12 @@
 .ccls
 compile_commands.json
 
-build/
-
 *.a
 *.so
 *.o
 *.bc
 *.dylib
 
-results
+results
+regression.diffs
+regression.out

Makefile

@@ -0,0 +1,84 @@
+.PHONY: duckdb install_duckdb clean_duckdb lintcheck
+
+MODULE_big = quack
+EXTENSION = quack
+DATA = quack.control $(wildcard quack--*.sql)
+
+SRCS = src/quack_heap_seq_scan.cpp \
+	   src/quack_heap_scan.cpp \
+	   src/quack_hooks.cpp \
+	   src/quack_select.cpp \
+	   src/quack_types.cpp \
+	   src/quack_memory_allocator.cpp \
+	   src/quack.cpp
+
+OBJS = $(subst .cpp,.o, $(SRCS))
+
+REGRESS = basic
+
+PG_CONFIG ?= pg_config
+
+PGXS := $(shell $(PG_CONFIG) --pgxs)
+PG_LIB := $(shell $(PG_CONFIG) --pkglibdir)
+INCLUDEDIR := ${shell $(PG_CONFIG) --includedir}
+INCLUDEDIR_SERVER := ${shell $(PG_CONFIG) --includedir-server}
+
+QUACK_BUILD_CXX_FLAGS=
+QUACK_BUILD_DUCKDB=
+
+ifeq ($(QUACK_BUILD), Debug)
+	QUACK_BUILD_CXX_FLAGS = -g -O0
+	QUACK_BUILD_DUCKDB = debug
+else
+	QUACK_BUILD_CXX_FLAGS =
+	QUACK_BUILD_DUCKDB = release
+endif
+
+override PG_CPPFLAGS += -Iinclude -Ithird_party/duckdb/src/include -std=c++17 ${QUACK_BUILD_CXX_FLAGS}
+
+SHLIB_LINK += -Wl,-rpath,$(PG_LIB)/ -lpq -L$(PG_LIB) -lduckdb -Lthird_party/duckdb/build/$(QUACK_BUILD_DUCKDB)/src -lstdc++
+
+COMPILE.cc.bc = $(CXX) -Wno-ignored-attributes -Wno-register $(BITCODE_CXXFLAGS) $(CXXFLAGS) $(PG_CPPFLAGS) -I$(INCLUDEDIR_SERVER) -emit-llvm -c
+
+%.bc : %.cpp
+	$(COMPILE.cc.bc) $(SHLIB_LINK) $(PG_CPPFLAGS) -I$(INCLUDE_SERVER) -o $@ $<
+
+# determine the name of the duckdb library that is built
+UNAME_S := $(shell uname -s)
+ifeq ($(UNAME_S),Darwin)
+	DUCKDB_LIB = libduckdb.dylib
+endif
+ifeq ($(UNAME_S),Linux)
+	DUCKDB_LIB = libduckdb.so
+endif
+
+all: duckdb $(OBJS)
+
+include $(PGXS)
+
+duckdb: third_party/duckdb third_party/duckdb/build/$(QUACK_BUILD_DUCKDB)/src/$(DUCKDB_LIB)
+
+third_party/duckdb:
+	git submodule update --init --recursive
+
+third_party/duckdb/build/$(QUACK_BUILD_DUCKDB)/src/$(DUCKDB_LIB):
+	$(MAKE) -C third_party/duckdb $(QUACK_BUILD_DUCKDB) DISABLE_SANITIZER=1 ENABLE_UBSAN=0 BUILD_UNITTESTS=OFF CMAKE_EXPORT_COMPILE_COMMANDS=1
+
+install_duckdb:
+	$(install_bin) -m 755 third_party/duckdb/build/$(QUACK_BUILD_DUCKDB)/src/$(DUCKDB_LIB) $(DESTDIR)$(PG_LIB)
+
+clean_duckdb:
+	rm -rf third_party/duckdb/build
+
+install: install_duckdb
+
+clean: clean_duckdb
+
+lintcheck:
+	clang-tidy $(SRCS) -- -I$(INCLUDEDIR) -I$(INCLUDEDIR_SERVER) -Iinclude $(CPPFLAGS) -std=c++17
+
+.depend:
+	$(RM) -f .depend
+	$(foreach SRC,$(SRCS),$(CXX) $(CPPFLAGS) -I$(INCLUDEDIR) -I$(INCLUDEDIR_SERVER) -MM -MT $(SRC:.cpp=.o) $(SRC) >> .depend;)
+
+include .depend