Contrib module implements toaster for non-compressed bytea columns, which allows fast appending to existing bytea value. Appended tail stored directly in toaster pointer, if there is enough place to do it.

Note: patch modifies byteacat() to support contrib toaster.

Added varlena changes for bytea_appendable_toaster and added bytea toaster to makefile
0005_bytea_appendable_toaster patch

Author: Nikita Malakhov

contrib/Makefile

@@ -14,6 +14,7 @@ SUBDIRS = \
 		bloom		\
 		btree_gin	\
 		btree_gist	\
+		bytea_toaster	\
 		citext		\
 		cube		\
 		dblink		\

contrib/bytea_toaster/Makefile

@@ -0,0 +1,23 @@
+# contrib/bytea_toaster/Makefile
+
+MODULE_big = bytea_toaster
+OBJS = \
+	$(WIN32RES) \
+	bytea_toaster.o
+
+EXTENSION = bytea_toaster
+DATA = bytea_toaster--1.0.sql
+PGFILEDESC = "bytea_toaster - appendable bytea toaster"
+
+REGRESS = bytea_toaster
+
+ifdef USE_PGXS
+PG_CONFIG = pg_config
+PGXS := $(shell $(PG_CONFIG) --pgxs)
+include $(PGXS)
+else
+subdir = contrib/bytea_toaster
+top_builddir = ../..
+include $(top_builddir)/src/Makefile.global
+include $(top_srcdir)/contrib/contrib-global.mk
+endif

contrib/bytea_toaster/bytea_toaster--1.0.sql

@@ -0,0 +1,13 @@
+/* contrib/bytea_toaster/bytea_toaster--1.0.sql */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION bytea_toaster" to load this file. \quit
+
+CREATE FUNCTION bytea_toaster_handler(internal)
+RETURNS toaster_handler
+AS 'MODULE_PATHNAME'
+LANGUAGE C;
+
+CREATE TOASTER bytea_toaster  HANDLER bytea_toaster_handler;
+
+COMMENT ON TOASTER bytea_toaster IS 'bytea_toaster is a appendable bytea toaster';