Fix interface example errors causes by backend changes.

Permaine Cheung

src/interfaces/libpgeasy/examples/pginsert.c

@@ -41,7 +41,7 @@ main(int argc, char **argv)
 			afloat 	float4, \
 			adouble float8, \
 			achar	char, \
-			achar16	char16, \
+			achar16	char(16), \
 			abpchar char(10), \
 			avarchar varchar(50), \
 			atext	text, \

src/interfaces/libpgeasy/examples/pgnulltest.c

@@ -52,7 +52,7 @@ main(int argc, char **argv)
             afloat  float4, \
             adouble float8, \
             achar   char, \
-            achar16 char16, \
+            achar16 char(16), \
             abpchar char(10), \
             avarchar varchar(50), \
             atext   text, \

src/interfaces/libpq++/examples/testlibpq4.sql

@@ -2,4 +2,4 @@ CREATE TABLE TBL1 (i int4);
 
 CREATE TABLE TBL2 (i int4);
 
-CREATE RULE r1 AS ON INSERT TO TBL1 DO [INSERT INTO TBL2 values (new.i); NOTIFY TBL2];
+CREATE RULE r1 AS ON INSERT TO TBL1 DO (INSERT INTO TBL2 values (new.i); NOTIFY TBL2);

src/interfaces/libpq++/examples/testlibpq6.cc

@@ -25,7 +25,7 @@ int main()
   else cout << "Connected to database '" << dbName << "'..." << endl;
 
   // Create a new table
-  if ( !data.ExecCommandOk("CREATE TABLE foo (a int4, b char16, d float8)") ) {
+  if ( !data.ExecCommandOk("CREATE TABLE foo (a int4, b char(16), d float8)") ) {
       cerr << "CREATE TABLE foo command failed" << endl;
       exit(1);
   }