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postgres/src/include/commands/portalcmds.h

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The contents of command.c, creatinh.c, define.c, remove.c and rename.c have been divided according to the type of object manipulated - so ALTER TABLE code is in tablecmds.c, aggregate commands in aggregatecmds.c and so on. A few common support routines remain in define.c (prototypes in src/include/commands/defrem.h). No code has been changed except for includes to reflect the new files. The prototypes for aggregatecmds.c, functioncmds.c, operatorcmds.c, and typecmds.c remain in src/include/commands/defrem.h. From John Gray <jgray@azuli.co.uk>
24 years ago
/*-------------------------------------------------------------------------
*
* portalcmds.h
* prototypes for portalcmds.c.
*
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
pgindent run.
23 years ago
* $Id: portalcmds.h,v 1.11 2003/08/04 00:43:30 momjian Exp $
The contents of command.c, creatinh.c, define.c, remove.c and rename.c have been divided according to the type of object manipulated - so ALTER TABLE code is in tablecmds.c, aggregate commands in aggregatecmds.c and so on. A few common support routines remain in define.c (prototypes in src/include/commands/defrem.h). No code has been changed except for includes to reflect the new files. The prototypes for aggregatecmds.c, functioncmds.c, operatorcmds.c, and typecmds.c remain in src/include/commands/defrem.h. From John Gray <jgray@azuli.co.uk>
24 years ago
*
*-------------------------------------------------------------------------
*/
#ifndef PORTALCMDS_H
#define PORTALCMDS_H
#include "utils/portal.h"
Restructure parsetree representation of DECLARE CURSOR: now it's a utility statement (DeclareCursorStmt) with a SELECT query dangling from it, rather than a SELECT query with a few unusual fields in it. Add code to determine whether a planned query can safely be run backwards. If DECLARE CURSOR specifies SCROLL, ensure that the plan can be run backwards by adding a Materialize plan node if it can't. Without SCROLL, you get an error if you try to fetch backwards from a cursor that can't handle it. (There is still some discussion about what the exact behavior should be, but this is necessary infrastructure in any case.) Along the way, make EXPLAIN DECLARE CURSOR work.
23 years ago
pgindent run.
23 years ago
extern void PerformCursorOpen(DeclareCursorStmt * stmt);
Restructure parsetree representation of DECLARE CURSOR: now it's a utility statement (DeclareCursorStmt) with a SELECT query dangling from it, rather than a SELECT query with a few unusual fields in it. Add code to determine whether a planned query can safely be run backwards. If DECLARE CURSOR specifies SCROLL, ensure that the plan can be run backwards by adding a Materialize plan node if it can't. Without SCROLL, you get an error if you try to fetch backwards from a cursor that can't handle it. (There is still some discussion about what the exact behavior should be, but this is necessary infrastructure in any case.) Along the way, make EXPLAIN DECLARE CURSOR work.
23 years ago
Restructure command destination handling so that we pass around DestReceiver pointers instead of just CommandDest values. The DestReceiver is made at the point where the destination is selected, rather than deep inside the executor. This cleans up the original kluge implementation of tstoreReceiver.c, and makes it easy to support retrieving results from utility statements inside portals. Thus, you can now do fun things like Bind and Execute a FETCH or EXPLAIN command, and it'll all work as expected (e.g., you can Describe the portal, or use Execute's count parameter to suspend the output partway through). Implementation involves stuffing the utility command's output into a Tuplestore, which would be kind of annoying for huge output sets, but should be quite acceptable for typical uses of utility commands.
23 years ago
extern void PerformPortalFetch(FetchStmt *stmt, DestReceiver *dest,
pgindent run.
23 years ago
char *completionTag);
The contents of command.c, creatinh.c, define.c, remove.c and rename.c have been divided according to the type of object manipulated - so ALTER TABLE code is in tablecmds.c, aggregate commands in aggregatecmds.c and so on. A few common support routines remain in define.c (prototypes in src/include/commands/defrem.h). No code has been changed except for includes to reflect the new files. The prototypes for aggregatecmds.c, functioncmds.c, operatorcmds.c, and typecmds.c remain in src/include/commands/defrem.h. From John Gray <jgray@azuli.co.uk>
24 years ago
Extended query protocol: parse, bind, execute, describe FE/BE messages. Only lightly tested as yet, since libpq doesn't know anything about 'em.
23 years ago
extern void PerformPortalClose(const char *name);
The contents of command.c, creatinh.c, define.c, remove.c and rename.c have been divided according to the type of object manipulated - so ALTER TABLE code is in tablecmds.c, aggregate commands in aggregatecmds.c and so on. A few common support routines remain in define.c (prototypes in src/include/commands/defrem.h). No code has been changed except for includes to reflect the new files. The prototypes for aggregatecmds.c, functioncmds.c, operatorcmds.c, and typecmds.c remain in src/include/commands/defrem.h. From John Gray <jgray@azuli.co.uk>
24 years ago
Code review for holdable-cursors patch. Fix error recovery, memory context sloppiness, some other things. Includes Neil's mopup patch of 22-Apr.
23 years ago
extern void PortalCleanup(Portal portal, bool isError);
The contents of command.c, creatinh.c, define.c, remove.c and rename.c have been divided according to the type of object manipulated - so ALTER TABLE code is in tablecmds.c, aggregate commands in aggregatecmds.c and so on. A few common support routines remain in define.c (prototypes in src/include/commands/defrem.h). No code has been changed except for includes to reflect the new files. The prototypes for aggregatecmds.c, functioncmds.c, operatorcmds.c, and typecmds.c remain in src/include/commands/defrem.h. From John Gray <jgray@azuli.co.uk>
24 years ago
Portal and memory management infrastructure for extended query protocol. Both plannable queries and utility commands are now always executed within Portals, which have been revamped so that they can handle the load (they used to be good only for single SELECT queries). Restructure code to push command-completion-tag selection logic out of postgres.c, so that it won't have to be duplicated between simple and extended queries. initdb forced due to addition of a field to Query nodes.
23 years ago
extern void PersistHoldablePortal(Portal portal);
pgindent run.
24 years ago
#endif /* PORTALCMDS_H */