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Make new event trigger facility actually do something.

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Commit 3855968f32 added syntax, pg_dump,
psql support, and documentation, but the triggers didn't actually fire.
With this commit, they now do.  This is still a pretty basic facility
overall because event triggers do not get a whole lot of information
about what the user is trying to do unless you write them in C; and
there's still no option to fire them anywhere except at the very
beginning of the execution sequence, but it's better than nothing,
and a good building block for future work.

Along the way, add a regression test for ALTER LARGE OBJECT, since
testing of event triggers reveals that we haven't got one.

Dimitri Fontaine and Robert Haas
This commit is contained in:
Robert Haas
2012-07-20 11:38:47 -04:00
parent be86e3dd5b
commit 3a0e4d36eb
28 changed files with 1087 additions and 197 deletions
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20
src/include/tcop/utility.h
View File

@@ -16,19 +16,27 @@
#include "tcop/tcopprot.h"
typedef enum
{
PROCESS_UTILITY_TOPLEVEL, /* toplevel interactive command */
PROCESS_UTILITY_QUERY, /* a complete query, but not toplevel */
PROCESS_UTILITY_SUBCOMMAND, /* a piece of a query */
PROCESS_UTILITY_GENERATED /* internally generated node query node */
} ProcessUtilityContext;
/* Hook for plugins to get control in ProcessUtility() */
typedef void (*ProcessUtility_hook_type) (Node *parsetree,
const char *queryString, ParamListInfo params, bool isTopLevel,
DestReceiver *dest, char *completionTag);
const char *queryString, ParamListInfo params,
DestReceiver *dest, char *completionTag,
ProcessUtilityContext context);
extern PGDLLIMPORT ProcessUtility_hook_type ProcessUtility_hook;
extern void ProcessUtility(Node *parsetree, const char *queryString,
ParamListInfo params, bool isTopLevel,
DestReceiver *dest, char *completionTag);
ParamListInfo params, DestReceiver *dest, char *completionTag,
ProcessUtilityContext context);
extern void standard_ProcessUtility(Node *parsetree, const char *queryString,
ParamListInfo params, bool isTopLevel,
DestReceiver *dest, char *completionTag);
ParamListInfo params, DestReceiver *dest,
char *completionTag, ProcessUtilityContext context);
extern bool UtilityReturnsTuples(Node *parsetree);