Initial commit of prepstmt, selects, record sets

This is full of holes, but all the basics are covered.

1 files changed, 57 insertions, 0 deletions

diff --git a/lib/output/pq/pqBindings.h b/lib/output/pq/pqBindings.h
new file mode 100644
index 0000000..ef0df84
--- /dev/null
+++ b/lib/output/pq/pqBindings.h
@@ -0,0 +1,57 @@
+#ifndef MYGRATE_OUTPUT_PQ_PQBINDINGS
+#define MYGRATE_OUTPUT_PQ_PQBINDINGS
+
+#include <dbTypes.h>
+#include <helpers.h>
+#include <initializer_list>
+#include <variant>
+#include <vector>
+
+namespace MyGrate::Output::Pq {
+	struct Bindings {
+		// NOLINTNEXTLINE(hicpp-explicit-conversions)
+		explicit Bindings(const std::initializer_list<DbValue> & vs)
+		{
+			bufs.reserve(vs.size());
+			values.reserve(vs.size());
+			lengths.reserve(vs.size());
+			for (const auto & v : vs) {
+				std::visit(*this, v);
+			}
+		}
+		template<Stringable T>
+		void
+		operator()(const T & v)
+		{
+			bufs.emplace_back(std::to_string(v));
+			const auto & vw {bufs.back()};
+			values.emplace_back(vw.data());
+			lengths.emplace_back(vw.length());
+		}
+		template<Viewable T>
+		void
+		operator()(const T & v)
+		{
+			values.emplace_back(v.data());
+			lengths.emplace_back(v.size());
+		}
+		template<typename T>
+		void
+		operator()(const T &)
+		{
+			throw std::runtime_error("Not implemented");
+		}
+		void
+		operator()(const std::nullptr_t &)
+		{
+			values.emplace_back(nullptr);
+			lengths.emplace_back(0);
+		}
+
+		std::vector<std::string> bufs;
+		std::vector<const char *> values;
+		std::vector<int> lengths;
+	};
+}
+
+#endif