Version 1.1. Better support of pg_dump utility

Author: afiskon

Makefile

@@ -1,6 +1,6 @@
 EXTENSION = zson
 MODULES = zson
-DATA = zson--1.0.sql
+DATA = zson--1.0.sql zson--1.0--1.1.sql
 OBJS = zson.o
 REGRESS = zson
 

zson--1.0--1.1.sql

@@ -0,0 +1,4 @@
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION zson" to load this file. \quit
+
+SELECT pg_catalog.pg_extension_config_dump('zson_dict', '');

zson.c

@@ -494,7 +494,7 @@ jsonb_to_zson(PG_FUNCTION_ARGS)
 			 errcode(ERRCODE_INTERNAL_ERROR),
 			 errmsg("Unable to compress jsonb"),
 			 errdetail("zson_dict is not initialized"),
-			 errhint("You probably forgot to execute zson_learn()")
+			 errhint("You probably forgot to execute zson_learn(). In case you are restoring from a backup made via pg_dump, just move the content of zson_dict table above the current line.")
 			));
 
 	pdict = dict_get(dict_id);

zson.control

@@ -1,4 +1,4 @@
 comment = 'ZSON: an extension for transparent JSONB compression'
-default_version = '1.0'
+default_version = '1.1'
 module_pathname = '$libdir/zson'
 relocatable = false