From 8cbbdddac18d5aaf9546342291fa9a20de4deee8 Mon Sep 17 00:00:00 2001
From: Robert Haas <rhaas@postgresql.org>
Date: Thu, 11 Apr 2013 16:38:56 +0000
Subject: [PATCH] Copy hack!

---
 src/backend/commands/copy.c  | 10 ++++++++++
 src/backend/utils/misc/guc.c | 11 +++++++++++
 src/include/miscadmin.h      |  2 ++
 3 files changed, 23 insertions(+)

diff --git a/src/backend/commands/copy.c b/src/backend/commands/copy.c
index 4eb94a43ad..3e44f094b3 100644
--- a/src/backend/commands/copy.c
+++ b/src/backend/commands/copy.c
@@ -2204,9 +2204,19 @@ CopyFrom(CopyState cstate)
 		/* Switch into its memory context */
 		MemoryContextSwitchTo(GetPerTupleMemoryContext(estate));
 
+		if (copy_hack > 1)
+		{
+			if (!CopyReadLine(cstate))
+				break;
+			continue;
+		}
+
 		if (!NextCopyFrom(cstate, econtext, values, nulls, &loaded_oid))
 			break;
 
+		if (copy_hack > 0)
+			continue;
+
 		/* And now we can form the input tuple. */
 		tuple = heap_form_tuple(tupDesc, values, nulls);
 
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 22ba35fef9..b9505eb9fd 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -138,6 +138,7 @@ extern bool optimize_bounded_sort;
 #endif
 
 static int	GUC_check_errcode_value;
+int			copy_hack;
 
 /* global variables for check hook support */
 char	   *GUC_check_errmsg_string;
@@ -2410,6 +2411,16 @@ static struct config_int ConfigureNamesInt[] =
 		NULL, NULL, NULL
 	},
 
+	{
+		{"copy_hack", PGC_USERSET, DEVELOPER_OPTIONS,
+			gettext_noop("Hacks COPY."),
+			NULL
+		},
+		&copy_hack,
+		0, 0, INT_MAX,
+		NULL, NULL, NULL
+	},
+
 	/* End-of-list marker */
 	{
 		{NULL, 0, 0, NULL, NULL}, NULL, 0, 0, 0, NULL, NULL, NULL
diff --git a/src/include/miscadmin.h b/src/include/miscadmin.h
index b69ffe59cd..6962a87175 100644
--- a/src/include/miscadmin.h
+++ b/src/include/miscadmin.h
@@ -445,4 +445,6 @@ extern bool has_rolreplication(Oid roleid);
 extern bool BackupInProgress(void);
 extern void CancelBackup(void);
 
+extern int copy_hack;
+
 #endif   /* MISCADMIN_H */
-- 
2.39.5