*** empty log message ***

Author: Michael Meskes

src/interfaces/ecpg/ChangeLog

@@ -809,5 +809,10 @@ Tue Feb 15 17:39:19 CET 2000
 Wed Feb 16 11:57:02 CET 2000
 
 	- Fixed library to be able to input complete arrays.
+
+Wed Feb 16 17:04:41 CET 2000
+
+	- Apply patch by Christof Petig <christof.petig@wtal.de> that adds
+	  descriptors.
 	- Set library version to 3.1.0.
 	- Set ecpg version to 2.7.0.

src/interfaces/ecpg/README.dynSQL

@@ -0,0 +1,20 @@
+descriptor statements have the following shortcomings
+
+- up to now the only reasonable statement is
+	FETCH ... INTO SQL DESCRIPTOR <name>
+  no input variables allowed!
+  
+  Reason: to fully support dynamic SQL the frontend/backend communication
+  	should change to recognize input parameters.
+  	Since this is not likely to happen in the near future and you
+  	can cover the same functionality with the existing infrastructure
+  	I'll leave the work to someone else.
+
+- string buffer overflow does not always generate warnings 
+	(beware: terminating 0 may be missing because strncpy is used)
+	:var=data sets sqlwarn accordingly (but not indicator)
+
+- char variables pointing to NULL are not allocated on demand
+	
+- string truncation does not show up in indicator
+

src/interfaces/ecpg/TODO

@@ -18,8 +18,6 @@ cvariable for an array var
 
 How can one insert arrays from c variables?
 
-support for dynamic SQL with unknown number of variables with DESCRIPTORS
-
 What happens to the output variable during read if there was an
 indicator-error? 
 

src/interfaces/ecpg/include/Makefile

@@ -10,11 +10,13 @@ install::
 	$(INSTALL) $(INSTLOPTS) ecpglib.h $(HEADERDIR)	
 	$(INSTALL) $(INSTLOPTS) ecpgtype.h $(HEADERDIR)	
 	$(INSTALL) $(INSTLOPTS) sqlca.h $(HEADERDIR)	
+	$(INSTALL) $(INSTLOPTS) sql3types.h $(HEADERDIR)	
 
 uninstall::
 	rm -f $(HEADERDIR)/ecpgerrno.h
 	rm -f $(HEADERDIR)/ecpglib.h
 	rm -f $(HEADERDIR)/ecpgtype.h
 	rm -f $(HEADERDIR)/sqlca.h
+	rm -f $(HEADERDIR)/sql3types.h
 
 dep depend:

src/interfaces/ecpg/include/ecpgerrno.h

@@ -29,6 +29,10 @@
 
 #define ECPG_INVALID_STMT	-230
 
+/* dynamic SQL related */
+#define ECPG_UNKNOWN_DESCRIPTOR	-240
+#define ECPG_INVALID_DESCRIPTOR_INDEX	-241
+
 /* finally the backend error messages, they start at 400 */
 #define ECPG_PGSQL		-400
 #define ECPG_TRANS		-401

src/interfaces/ecpg/include/ecpglib.h

@@ -1,4 +1,5 @@
 #include <postgres.h>
+#include <libpq-fe.h>
 
 #ifdef __cplusplus
 extern		"C"
@@ -49,6 +50,17 @@ extern		"C"
 
 #define		  SQLCODE	 sqlca.sqlcode
 
+/* dynamic SQL */
+
+	unsigned int	ECPGDynamicType(Oid type);
+	unsigned int	ECPGDynamicType_DDT(Oid type);
+	PGresult *		ECPGresultByDescriptor(int line,const char *name);
+	bool			ECPGdo_descriptor(int line,const char *connection,
+							const char *descriptor,const char *query);
+	bool			ECPGdeallocate_desc(int line,const char *name);
+	bool			ECPGallocate_desc(int line,const char *name);
+	void			ECPGraise(int line,int code);
+
 #ifdef __cplusplus
 }
 

src/interfaces/ecpg/include/sql3types.h

@@ -0,0 +1,38 @@
+/* SQL3 dynamic type codes
+ *
+ * Copyright (c) 2000, Christof Petig <christof.petig@wtal.de>
+ *
+ * $Header: /cvsroot/pgsql/src/interfaces/ecpg/include/sql3types.h,v 1.1 2000/02/16 16:18:03 meskes Exp $
+ */
+
+/* chapter 13.1 table 2: Codes used for SQL data types in Dynamic SQL */
+
+enum { 	SQL3_CHARACTER=1,
+	SQL3_NUMERIC,
+	SQL3_DECIMAL,
+	SQL3_INTEGER,
+	SQL3_SMALLINT,
+	SQL3_FLOAT,
+	SQL3_REAL,
+	SQL3_DOUBLE_PRECISION,
+	SQL3_DATE_TIME_TIMESTAMP,
+	SQL3_INTERVAL, //10
+	SQL3_CHARACTER_VARYING=12,
+	SQL3_ENUMERATED,
+	SQL3_BIT,
+	SQL3_BIT_VARYING,
+	SQL3_BOOLEAN,
+	SQL3_abstract
+	// the rest is xLOB stuff
+     };
+
+/* chapter 13.1 table 3: Codes associated with datetime data types in Dynamic SQL */
+
+enum {	SQL3_DDT_DATE=1,
+	SQL3_DDT_TIME,
+	SQL3_DDT_TIMESTAMP,
+	SQL3_DDT_TIME_WITH_TIME_ZONE,
+	SQL3_DDT_TIMESTAMP_WITH_TIME_ZONE,
+	
+	SQL3_DDT_ILLEGAL /* not a datetime data type (not part of standard) */
+     };

src/interfaces/ecpg/lib/Makefile.in

@@ -6,7 +6,7 @@
 # Copyright (c) 1994, Regents of the University of California
 #
 # IDENTIFICATION
-#    $Header: /cvsroot/pgsql/src/interfaces/ecpg/lib/Attic/Makefile.in,v 1.57 2000/02/16 11:52:24 meskes Exp $
+#    $Header: /cvsroot/pgsql/src/interfaces/ecpg/lib/Attic/Makefile.in,v 1.58 2000/02/16 16:18:05 meskes Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -36,7 +36,7 @@ include $(SRCDIR)/Makefile.shlib
 install: install-lib $(install-shlib-dep)
 
 # Handmade dependencies in case make depend not done
-ecpglib.o : ecpglib.c ../include/ecpglib.h ../include/ecpgtype.h
+ecpglib.o : ecpglib.c ../include/ecpglib.h ../include/ecpgtype.h dynamic.c
 typename.o : typename.c ../include/ecpgtype.h