Add jsonpath support for json type

Author: Nikita Glukhov

src/backend/utils/adt/Makefile

@@ -17,7 +17,7 @@ OBJS = acl.o amutils.o arrayfuncs.o array_expanded.o array_selfuncs.o \
 	float.o format_type.o formatting.o genfile.o \
 	geo_ops.o geo_selfuncs.o geo_spgist.o inet_cidr_ntop.o inet_net_pton.o \
 	int.o int8.o json.o jsonb.o jsonb_gin.o jsonb_op.o jsonb_util.o \
-	jsonfuncs.o jsonpath_gram.o jsonpath_scan.o jsonpath.o jsonpath_exec.o \
+	jsonfuncs.o jsonpath_gram.o jsonpath_scan.o jsonpath.o jsonpath_exec.o jsonpath_json.o \
 	like.o lockfuncs.o mac.o mac8.o misc.o name.o \
 	network.o network_gist.o network_selfuncs.o network_spgist.o \
 	numeric.o numutils.o oid.o oracle_compat.o \
@@ -42,6 +42,8 @@ jsonpath_gram.h: jsonpath_gram.c ;
 # Force these dependencies to be known even without dependency info built:
 jsonpath_gram.o jsonpath_scan.o jsonpath_parser.o: jsonpath_gram.h
 
+jsonpath_json.o: jsonpath_exec.c
+
 # jsonpath_gram.c, jsonpath_gram.h, and jsonpath_scan.c are in the distribution
 # tarball, so they are not cleaned here.
 clean distclean maintainer-clean: