1. fix optional field related issues 2. add static casting for constant records

git-svn-id: https://asterixdb.googlecode.com/svn/branches/asterix_opentype@280 eaa15691-b419-025a-1212-ee371bd00084
diff --git a/asterix-app/src/test/resources/runtimets/queries/failure/insert.aql b/asterix-app/src/test/resources/runtimets/queries/failure/insert.aql
index 3f1daad..a0ce842 100644
--- a/asterix-app/src/test/resources/runtimets/queries/failure/insert.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/failure/insert.aql
@@ -47,7 +47,7 @@
 	where $l.l_orderkey<1000
 	return {
 		"l_orderkey": $l.l_orderkey,
-		"l_partkey": $l.l_linenumber,
+		"l_linenumber": $l.l_linenumber,
 		"l_suppkey": $l.l_partkey
 	}
 );
@@ -58,7 +58,7 @@
 	die after 1000
 	return {
 		"l_orderkey": $l.l_orderkey,
-		"l_partkey": $l.l_linenumber,
+		"l_linenumber": $l.l_linenumber,
 		"l_suppkey": $l.l_partkey
 	}
 );