Building arrow core via bazel

udf-runner-cpp/v2/BUILD.bazel

@@ -1,8 +1,55 @@
+load("@rules_cc//cc:cc_binary.bzl", "cc_binary")
 load("@rules_cc//cc:cc_library.bzl", "cc_library")
 load("@rules_cc//cc:cc_test.bzl", "cc_test")
 
 package(default_visibility = ["//visibility:public"])
 
+alias(
+    name = "arrow_core",
+    actual = "@v2_arrow//:arrow_core",
+)
+
+filegroup(
+    name = "arrow_c_data_demo_exports",
+    srcs = ["arrow_c_data_demo.exports.map"],
+)
+
+cc_binary(
+    name = "libarrow_c_data_demo.so",
+    srcs = ["arrow_c_data_demo.cc"],
+    additional_linker_inputs = [":arrow_c_data_demo_exports"],
+    copts = [
+        "-std=c++20",
+        "-fvisibility=hidden",
+        "-fvisibility-inlines-hidden",
+    ],
+    linkopts = [
+        "-Wl,--exclude-libs,ALL",
+        "-Wl,--exclude-libs,libarrow_core.a",
+        "-Wl,--version-script=$(location :arrow_c_data_demo_exports)",
+    ],
+    linkshared = 1,
+    deps = [":arrow_core"],
+)
+
+cc_test(
+    name = "arrow_core_test",
+    srcs = ["arrow_core_test.cc"],
+    copts = ["-std=c++20"],
+    deps = [":arrow_core"],
+)
+
+cc_test(
+    name = "arrow_c_data_demo_test",
+    srcs = ["arrow_c_data_demo_test.cc"],
+    copts = ["-std=c++20"],
+    data = [":libarrow_c_data_demo.so"],
+    args = ["$(location :libarrow_c_data_demo.so)"],
+    linkopts = ["-ldl"],
+    target_compatible_with = ["@platforms//os:linux"],
+    deps = [":arrow_core"],
+)
+
 cc_library(
     name = "json_schema",
     hdrs = ["include/exasol/udf/v2/json_schema.hpp"],

udf-runner-cpp/v2/MODULE.bazel

@@ -11,6 +11,34 @@ http_archive = use_repo_rule(
     "http_archive",
 )
 
+http_archive(
+    name = "v2_xsimd",
+    urls = ["https://github.com/xtensor-stack/xsimd/archive/14.2.0.tar.gz"],
+    sha256 = "21e841ab684b05331e81e7f782431753a029ef7b7d9d6d3ddab837e7782a40ee",
+    strip_prefix = "xsimd-14.2.0",
+    build_file_content = """
+load("@rules_cc//cc:cc_library.bzl", "cc_library")
+
+package(default_visibility = ["//visibility:public"])
+
+cc_library(
+    name = "xsimd",
+    hdrs = glob(["include/**/*.hpp"]),
+    includes = ["include"],
+)
+""",
+)
+
+http_archive(
+    name = "v2_arrow",
+    urls = ["https://github.com/apache/arrow/archive/refs/tags/apache-arrow-25.0.0.tar.gz"],
+    sha256 = "7ecdd404862c3d312601457861a11c30bb8f520328693e1323e3db1db985dbe5",
+    strip_prefix = "arrow-apache-arrow-25.0.0",
+    build_file = "//third_party/arrow:arrow.BUILD",
+    patches = ["//third_party/arrow:config_headers.patch"],
+    patch_args = ["-p1"],
+)
+
 http_archive(
     name = "v2_nlohmann_json",
     urls = ["https://github.com/nlohmann/json/archive/refs/tags/v3.12.0.tar.gz"],

udf-runner-cpp/v2/arrow_c_data_demo.cc

@@ -0,0 +1,124 @@
+#include <arrow/api.h>
+#include <arrow/c/bridge.h>
+
+#include <cstring>
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#if defined(_WIN32)
+#define UDF_RUNNER_CPP_V2_EXPORT __declspec(dllexport)
+#else
+#define UDF_RUNNER_CPP_V2_EXPORT __attribute__((visibility("default")))
+#endif
+
+namespace {
+
+thread_local std::string g_last_error;
+
+void SetLastError(const arrow::Status& status) {
+    g_last_error = status.ToString();
+}
+
+arrow::Result<std::shared_ptr<arrow::RecordBatch>> MakeDemoRecordBatch() {
+    arrow::Int64Builder id_builder;
+    arrow::StringBuilder name_builder;
+
+    ARROW_RETURN_NOT_OK(id_builder.Append(1));
+    ARROW_RETURN_NOT_OK(id_builder.Append(2));
+    ARROW_RETURN_NOT_OK(id_builder.Append(3));
+    ARROW_RETURN_NOT_OK(id_builder.Append(4));
+
+    ARROW_RETURN_NOT_OK(name_builder.Append("alpha"));
+    ARROW_RETURN_NOT_OK(name_builder.Append("beta"));
+    ARROW_RETURN_NOT_OK(name_builder.Append("gamma"));
+    ARROW_RETURN_NOT_OK(name_builder.Append("delta"));
+
+    std::shared_ptr<arrow::Array> ids;
+    std::shared_ptr<arrow::Array> names;
+    ARROW_RETURN_NOT_OK(id_builder.Finish(&ids));
+    ARROW_RETURN_NOT_OK(name_builder.Finish(&names));
+    const int64_t num_rows = ids->length();
+
+    auto schema = arrow::schema({
+        arrow::field("id", arrow::int64()),
+        arrow::field("name", arrow::utf8()),
+    });
+    return arrow::RecordBatch::Make(schema, num_rows, {std::move(ids), std::move(names)});
+}
+
+arrow::Status ExportDemoRecordBatch(ArrowArray* out_array, ArrowSchema* out_schema) {
+    if (out_array == nullptr || out_schema == nullptr) {
+        return arrow::Status::Invalid("output ArrowArray and ArrowSchema pointers must not be null");
+    }
+
+    std::memset(out_array, 0, sizeof(*out_array));
+    std::memset(out_schema, 0, sizeof(*out_schema));
+
+    auto maybe_batch = MakeDemoRecordBatch();
+    if (!maybe_batch.ok()) {
+        return maybe_batch.status();
+    }
+    ARROW_RETURN_NOT_OK(arrow::ExportRecordBatch(*maybe_batch.ValueOrDie(), out_array, out_schema));
+    return arrow::Status::OK();
+}
+
+arrow::Status ConsumeDemoRecordBatch(ArrowArray* array, ArrowSchema* schema,
+                                     int64_t* out_row_count, int64_t* out_id_sum) {
+    if (array == nullptr || schema == nullptr || out_row_count == nullptr ||
+        out_id_sum == nullptr) {
+        return arrow::Status::Invalid("input and output pointers must not be null");
+    }
+
+    ARROW_ASSIGN_OR_RAISE(auto batch, arrow::ImportRecordBatch(array, schema));
+    if (batch->num_columns() != 2) {
+        return arrow::Status::Invalid("expected two columns");
+    }
+    if (batch->schema()->field(0)->name() != "id" ||
+        batch->schema()->field(1)->name() != "name") {
+        return arrow::Status::Invalid("unexpected schema");
+    }
+
+    auto ids = std::static_pointer_cast<arrow::Int64Array>(batch->column(0));
+    int64_t sum = 0;
+    for (int64_t index = 0; index < ids->length(); ++index) {
+        if (!ids->IsNull(index)) {
+            sum += ids->Value(index);
+        }
+    }
+
+    *out_row_count = batch->num_rows();
+    *out_id_sum = sum;
+    return arrow::Status::OK();
+}
+
+}  // namespace
+
+extern "C" UDF_RUNNER_CPP_V2_EXPORT int udf_runner_cpp_v2_demo_export_record_batch(
+    ArrowArray* out_array, ArrowSchema* out_schema) {
+    const arrow::Status status = ExportDemoRecordBatch(out_array, out_schema);
+    if (!status.ok()) {
+        SetLastError(status);
+        return 1;
+    }
+    g_last_error.clear();
+    return 0;
+}
+
+extern "C" UDF_RUNNER_CPP_V2_EXPORT int udf_runner_cpp_v2_demo_consume_record_batch(
+    ArrowArray* array, ArrowSchema* schema, int64_t* out_row_count,
+    int64_t* out_id_sum) {
+    const arrow::Status status =
+        ConsumeDemoRecordBatch(array, schema, out_row_count, out_id_sum);
+    if (!status.ok()) {
+        SetLastError(status);
+        return 1;
+    }
+    g_last_error.clear();
+    return 0;
+}
+
+extern "C" UDF_RUNNER_CPP_V2_EXPORT const char* udf_runner_cpp_v2_demo_last_error(void) {
+    return g_last_error.c_str();
+}

udf-runner-cpp/v2/arrow_c_data_demo.exports.map

@@ -0,0 +1,9 @@
+{
+  global:
+    udf_runner_cpp_v2_demo_export_record_batch;
+    udf_runner_cpp_v2_demo_consume_record_batch;
+    udf_runner_cpp_v2_demo_last_error;
+  local:
+    *;
+};
+

udf-runner-cpp/v2/arrow_c_data_demo.h

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <arrow/c/abi.h>
+
+#include <stdint.h>
+
+#if defined(_WIN32)
+#define UDF_RUNNER_CPP_V2_EXPORT __declspec(dllexport)
+#else
+#define UDF_RUNNER_CPP_V2_EXPORT __attribute__((visibility("default")))
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+UDF_RUNNER_CPP_V2_EXPORT int udf_runner_cpp_v2_demo_export_record_batch(
+    struct ArrowArray* out_array, struct ArrowSchema* out_schema);
+
+UDF_RUNNER_CPP_V2_EXPORT int udf_runner_cpp_v2_demo_consume_record_batch(
+    struct ArrowArray* array, struct ArrowSchema* schema, int64_t* out_row_count,
+    int64_t* out_id_sum);
+
+UDF_RUNNER_CPP_V2_EXPORT const char* udf_runner_cpp_v2_demo_last_error(void);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+