1 files changed, 51 insertions, 0 deletions
diff --git a/src/backend/utils/misc/pg_config.c b/src/backend/utils/misc/pg_config.c
new file mode 100644
index 0000000..5819653
--- /dev/null
+++ b/src/backend/utils/misc/pg_config.c
@@ -0,0 +1,51 @@
+/*-------------------------------------------------------------------------
+ *
+ * pg_config.c
+ *		Expose same output as pg_config except as an SRF
+ *
+ * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * IDENTIFICATION
+ *	  src/backend/utils/misc/pg_config.c
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#include "postgres.h"
+
+#include "catalog/pg_type.h"
+#include "common/config_info.h"
+#include "funcapi.h"
+#include "miscadmin.h"
+#include "port.h"
+#include "utils/builtins.h"
+
+Datum
+pg_config(PG_FUNCTION_ARGS)
+{
+	ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
+	ConfigData *configdata;
+	size_t		configdata_len;
+	int			i = 0;
+
+	/* initialize our tuplestore */
+	InitMaterializedSRF(fcinfo, 0);
+
+	configdata = get_configdata(my_exec_path, &configdata_len);
+	for (i = 0; i < configdata_len; i++)
+	{
+		Datum		values[2];
+		bool		nulls[2];
+
+		memset(values, 0, sizeof(values));
+		memset(nulls, 0, sizeof(nulls));
+
+		values[0] = CStringGetTextDatum(configdata[i].name);
+		values[1] = CStringGetTextDatum(configdata[i].setting);
+
+		tuplestore_putvalues(rsinfo->setResult, rsinfo->setDesc, values, nulls);
+	}
+
+	return (Datum) 0;
+}