Started to create different error codes for different backend messages.

src/interfaces/ecpg/ChangeLog

@@ -1569,6 +1569,16 @@ Wed Jul  9 11:45:02 CEST 2003
 	- Made all Informix functions honor Informix NULLs.
 	- Extended compatibility functions for INFORMIX handling of DECLARE
 	  statement to work with indicators.
+	  
+Mon Jul 14 09:34:04 CEST 2003
+
+	- Synced preproc.y with gram.y
+	- Init sqlca in ECPGprepare().
+	- Added CLOSE DATABASE for Informix compatibility.
+	
+Tue Jul 15 14:28:53 CEST 2003
+
+	_ Started to add error codes for backend error messages.
 	- Set ecpg version to 3.0.0
 	- Set ecpg library to 4.0.0
 	- Set pgtypes library to 1.0.0

src/interfaces/ecpg/ecpglib/connect.c

@@ -1,4 +1,4 @@
-/* $Header: /cvsroot/pgsql/src/interfaces/ecpg/ecpglib/connect.c,v 1.11 2003/07/08 07:13:48 meskes Exp $ */
+/* $Header: /cvsroot/pgsql/src/interfaces/ecpg/ecpglib/connect.c,v 1.12 2003/07/15 12:38:38 meskes Exp $ */
 
 #define POSTGRES_ECPG_INTERNAL
 #include "postgres_fe.h"
@@ -68,7 +68,6 @@ ecpg_finish(struct connection * act)
 		struct ECPGtype_information_cache *cache,
 				   *ptr;
 
-		ECPGlog("ecpg_finish: finishing %s.\n", act->name);
 		PQfinish(act->connection);
 
 		/* no need to lock connections_mutex - we're always called
@@ -90,6 +89,8 @@ ecpg_finish(struct connection * act)
 		if (actual_connection == act)
 			actual_connection = all_connections;
 
+		ECPGlog("ecpg_finish: Connection %s closed.\n", act->name);
+
 		for (cache = act->cache_head; cache; ptr = cache, cache = cache->next, ECPGfree(ptr));
 		ECPGfree(act->name);
 		ECPGfree(act);
@@ -481,10 +482,9 @@ ECPGconnect(int lineno, int c, const char *name, const char *user, const char *p
 
 	if (PQstatus(this->connection) == CONNECTION_BAD)
 	{
-        const char *errmsg = PQerrorMessage(this->connection);
+         	const char *errmsg = PQerrorMessage(this->connection);
-        char *db = realname ? realname : "<DEFAULT>";
+	        char *db = realname ? realname : "<DEFAULT>";
 
-        set_backend_err(errmsg, lineno);
 		ecpg_finish(this);
 #ifdef USE_THREADS
 		pthread_mutex_unlock(&connections_mutex);

src/interfaces/ecpg/ecpglib/error.c

@@ -1,4 +1,4 @@
-/* $Header: /cvsroot/pgsql/src/interfaces/ecpg/ecpglib/error.c,v 1.2 2003/06/15 04:07:58 momjian Exp $ */
+/* $Header: /cvsroot/pgsql/src/interfaces/ecpg/ecpglib/error.c,v 1.3 2003/07/15 12:38:38 meskes Exp $ */
 
 #define POSTGRES_ECPG_INTERNAL
 #include "postgres_fe.h"
@@ -11,10 +11,6 @@
 #include "extern.h"
 #include "sqlca.h"
 
-/* This should hold the back-end error message from 
- * the last back-end operation. */
-static char *ECPGerr;
-
 void
 ECPGraise(int line, int code, const char *str)
 {
@@ -142,6 +138,11 @@ ECPGraise(int line, int code, const char *str)
 					slen--;
 				snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
 						 "'%.*s' in line %d.", slen, str, line);
+				if (strncmp(str, "ERROR:  Cannot insert a duplicate key", strlen("ERROR:  Cannot insert a duplicate key")) == 0)
+						sqlca->sqlcode = ECPG_DUPLICATE_KEY;
+				else if (strncmp(str, "ERROR:  More than one tuple returned by a subselect", strlen("ERROR:  More than one tuple returned by a subselect")) == 0)
+						sqlca->sqlcode = ECPG_SUBSELECT_NOT_ONE;
+				
 				break;
 			}
 
@@ -168,29 +169,6 @@ ECPGraise(int line, int code, const char *str)
 	ECPGfree_auto_mem();
 }
 
-/* Set the error message string from the backend */
-void
-set_backend_err(const char *err, int lineno)
-{
-	if (ECPGerr)
-		ECPGfree(ECPGerr);
-
-	if (!err)
-	{
-		ECPGerr = NULL;
-		return;
-	}
-
-	ECPGerr = ECPGstrdup(err, lineno);
-}
-
-/* Retrieve the error message from the backend. */
-char *
-ECPGerrmsg(void)
-{
-	return ECPGerr;
-}
-	
 /* print out an error message */
 void
 sqlprint(void)

src/interfaces/ecpg/ecpglib/execute.c

@@ -1,4 +1,4 @@
-/* $Header: /cvsroot/pgsql/src/interfaces/ecpg/ecpglib/execute.c,v 1.18 2003/07/08 12:11:29 meskes Exp $ */
+/* $Header: /cvsroot/pgsql/src/interfaces/ecpg/ecpglib/execute.c,v 1.19 2003/07/15 12:38:38 meskes Exp $ */
 
 /*
  * The aim is to get a simpler inteface to the database routines.
@@ -1131,7 +1131,6 @@ ECPGexecute(struct statement * stmt)
 		errmsg = PQerrorMessage(stmt->connection->connection);
 		ECPGlog("ECPGexecute line %d: error: %s", stmt->lineno, errmsg);
 		ECPGraise(stmt->lineno, ECPG_PGSQL, errmsg);
-		set_backend_err(errmsg, stmt->lineno);
 	}
 	else
 
@@ -1144,7 +1143,6 @@ ECPGexecute(struct statement * stmt)
 		struct sqlca_t *sqlca = ECPGget_sqlca();
 
 		errmsg = PQresultErrorMessage(results);
-		set_backend_err(errmsg, stmt->lineno);
 		
 		var = stmt->outlist;
 		switch (PQresultStatus(results))

src/interfaces/ecpg/ecpglib/extern.h

@@ -10,13 +10,6 @@ enum COMPAT_MODE { ECPG_COMPAT_PGSQL = 0, ECPG_COMPAT_INFORMIX, ECPG_COMPAT_INFO
 
 /* Here are some methods used by the lib. */
 
-/* Stores the backend error message for client access */
-void set_backend_err(const char *err, int lineon);
-
-/* Store and retrieve the backend error message for client access */
-void set_backend_err(const char *err, int lineon);
-char *ECPGerrmsg(void);
-
 /* Returns a pointer to a string containing a simple type name. */
 void		ECPGadd_mem(void *ptr, int lineno);
 

src/interfaces/ecpg/include/ecpgerrno.h

@@ -47,6 +47,8 @@
 #define ECPG_PGSQL			-400
 #define ECPG_TRANS			-401
 #define ECPG_CONNECT			-402
+#define ECPG_DUPLICATE_KEY		-403
+#define ECPG_SUBSELECT_NOT_ONE		-404
 
 /* backend WARNINGs, starting at 600 */
 #define ECPG_WARNING_UNRECOGNIZED	   -600

src/interfaces/ecpg/test/test_informix.pgc

@@ -17,8 +17,18 @@ int main()
 
 	rsetnull(CDECIMALTYPE, (char *)&j);
 	$insert into test (i, j) values (7, :j);
+	$commit;
+	
+	$insert into test (i, j) values (7, 2);
+	printf("%ld: %s\n", sqlca.sqlcode, sqlca.sqlerrm.sqlerrmc);
+	if (sqlca.sqlcode != 0) $rollback;
+
 	$insert into test (i, j) values (:i, 1);
 
+	$select i from test where j=(select j from test);
+	printf("%ld: %s\n", sqlca.sqlcode, sqlca.sqlerrm.sqlerrmc);
+	if (sqlca.sqlcode != 0) $rollback;
+
 	$declare c cursor for select * from test where i <= :i;
 	openit();