From 5f0e260cfbdd43556c5f867861216cba3692d8e4 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Fri, 23 Jul 2021 01:13:47 +0100
Subject: First cut replicating row inserts

---
 lib/output/pq/updateDatabase.cpp | 32 ++++++++++++++++++++++++++++++++
 lib/output/pq/updateDatabase.h   |  3 ++-
 2 files changed, 34 insertions(+), 1 deletion(-)

(limited to 'lib')

diff --git a/lib/output/pq/updateDatabase.cpp b/lib/output/pq/updateDatabase.cpp
index 65caf86..ebc3c43 100644
--- a/lib/output/pq/updateDatabase.cpp
+++ b/lib/output/pq/updateDatabase.cpp
@@ -319,4 +319,36 @@ namespace MyGrate::Output::Pq {
 			verify<ReplicationError>(out->deleteFrom->rows() == 1, "Wrong number of rows deleted.");
 		}
 	}
+
+	void
+	UpdateDatabase::insertRow(MariaDB_Event_Ptr e)
+	{
+		if (selected != tables.end()) {
+			auto & out = selected->second;
+			verify<std::runtime_error>(
+					e->event.rows.column_count == out->columns.size(), "Incorrect number of columns in row data");
+			if (!out->insertInto) {
+				std::stringstream ou;
+				std::size_t ordinal {0}, kordinal {out->columns.size()};
+
+				scprintf<"INSERT INTO %?.%? ">(ou, schema, selected->first);
+				for (const auto & col : out->columns) {
+					scprintf<"%? %?">(ou, !ordinal ? "(" : ", ", col->name);
+				}
+				ou << ") VALUES";
+				for (const auto & col : out->columns) {
+					scprintf<"%? $%?">(ou, !ordinal ? "(" : ", ", col->name);
+				}
+				ou << ")";
+
+				out->insertInto = prepare(ou.str().c_str(), kordinal);
+			}
+			std::vector<DbValue> updateValues;
+			updateValues.reserve(out->columns.size());
+			Row rp {e->event.rows, table_map->event.table_map};
+			std::copy(rp.begin(), rp.end(), std::back_inserter(updateValues));
+			out->insertInto->execute(updateValues);
+			verify<ReplicationError>(out->insertInto->rows() == 1, "Wrong number of rows updated.");
+		}
+	}
 }
diff --git a/lib/output/pq/updateDatabase.h b/lib/output/pq/updateDatabase.h
index 7641ada..89d9916 100644
--- a/lib/output/pq/updateDatabase.h
+++ b/lib/output/pq/updateDatabase.h
@@ -27,7 +27,7 @@ namespace MyGrate::Output::Pq {
 
 		std::vector<ColumnDefPtr> columns;
 		std::size_t keys;
-		DbPrepStmtPtr update, deleteFrom;
+		DbPrepStmtPtr update, deleteFrom, insertInto;
 	};
 	using TableDefPtr = std::unique_ptr<TableOutput>;
 
@@ -54,6 +54,7 @@ namespace MyGrate::Output::Pq {
 		// Replication events
 		void updateRow(MariaDB_Event_Ptr) override;
 		void deleteRow(MariaDB_Event_Ptr) override;
+		void insertRow(MariaDB_Event_Ptr) override;
 		void tableMap(MariaDB_Event_Ptr) override;
 
 		const uint64_t source;
-- 
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