postgres: Add postgres statement rewriting support

Signed-off-by: Christian Decker <decker.christian@gmail.com>

wallet/db_postgres.c

@@ -0,0 +1,36 @@
+#include <wallet/db_common.h>
+#include "gen_db_postgres.c"
+#include <ccan/ccan/tal/str/str.h>
+#include <lightningd/log.h>
+#include <sqlite3.h>
+#include <stdio.h>
+
+#if HAVE_POSTGRES
+
+struct db_config db_postgres_config = {
+	.name = "postgres",
+	.queries = NULL,
+	.num_queries = DB_POSTGRES_QUERY_COUNT,
+	.exec_fn = NULL,
+	.query_fn = NULL,
+	.step_fn = NULL,
+	.begin_tx_fn = NULL,
+	.commit_tx_fn = NULL,
+	.stmt_free_fn = NULL,
+
+	.column_is_null_fn = NULL,
+	.column_u64_fn = NULL,
+	.column_int_fn = NULL,
+	.column_bytes_fn = NULL,
+	.column_blob_fn = NULL,
+	.column_text_fn = NULL,
+
+	.last_insert_id_fn = NULL,
+	.count_changes_fn = NULL,
+	.setup_fn = NULL,
+	.teardown_fn = NULL,
+};
+
+AUTODATA(db_backends, &db_postgres_config);
+
+#endif