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Michael Meskes
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‎src/interfaces/ecpg/ChangeLog

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

‎src/interfaces/ecpg/README.dynSQL

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

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How can one insert arrays from c variables?
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support for dynamic SQL with unknown number of variables with DESCRIPTORS
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What happens to the output variable during read if there was an
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indicator-error?
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‎src/interfaces/ecpg/include/Makefile

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

‎src/interfaces/ecpg/include/ecpgerrno.h

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

‎src/interfaces/ecpg/include/ecpglib.h

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#include <postgres.h>
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#include <libpq-fe.h>
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#ifdef __cplusplus
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extern "C"
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#define SQLCODE sqlca.sqlcode
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/* dynamic SQL */
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unsigned int ECPGDynamicType(Oid type);
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unsigned int ECPGDynamicType_DDT(Oid type);
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PGresult * ECPGresultByDescriptor(int line,const char *name);
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bool ECPGdo_descriptor(int line,const char *connection,
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const char *descriptor,const char *query);
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bool ECPGdeallocate_desc(int line,const char *name);
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bool ECPGallocate_desc(int line,const char *name);
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void ECPGraise(int line,int code);
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#ifdef __cplusplus
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}
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‎src/interfaces/ecpg/include/sql3types.h

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

‎src/interfaces/ecpg/lib/Makefile.in

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