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ObjectClass is an enum whose values correspond to catalog OIDs. But the extra layer of redirection, which is used only in small parts of the code, and the similarity to ObjectType, are confusing and cumbersome. One advantage has been that some switches processing the OCLASS enum don't have "default:" cases. This is so that the compiler tells us when we fail to add support for some new object class. But you can also handle that with some assertions and proper test coverage. It's not even clear how strong this benefit is. For example, in AlterObjectNamespace_oid(), you could still put a new OCLASS into the "ignore object types that don't have schema-qualified names" case, and it might or might not be wrong. Also, there are already various OCLASS switches that do have a default case, so it's not even clear what the preferred coding style should be. Reviewed-by: jian he <jian.universality@gmail.com> Reviewed-by: Michael Paquier <michael@paquier.xyz> Discussion: https://www.postgresql.org/message-id/flat/CAGECzQT3caUbcCcszNewCCmMbCuyP7XNAm60J3ybd6PN5kH2Dw%40mail.gmail.com
92 lines
3.3 KiB
C
92 lines
3.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* event_trigger.h
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* Declarations for command trigger handling.
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*
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* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/commands/event_trigger.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef EVENT_TRIGGER_H
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#define EVENT_TRIGGER_H
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#include "catalog/dependency.h"
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#include "catalog/objectaddress.h"
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#include "catalog/pg_event_trigger.h"
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#include "nodes/parsenodes.h"
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#include "tcop/cmdtag.h"
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#include "tcop/deparse_utility.h"
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#include "utils/aclchk_internal.h"
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typedef struct EventTriggerData
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{
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NodeTag type;
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const char *event; /* event name */
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Node *parsetree; /* parse tree */
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CommandTag tag;
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} EventTriggerData;
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extern PGDLLIMPORT bool event_triggers;
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#define AT_REWRITE_ALTER_PERSISTENCE 0x01
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#define AT_REWRITE_DEFAULT_VAL 0x02
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#define AT_REWRITE_COLUMN_REWRITE 0x04
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#define AT_REWRITE_ACCESS_METHOD 0x08
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/*
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* EventTriggerData is the node type that is passed as fmgr "context" info
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* when a function is called by the event trigger manager.
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*/
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#define CALLED_AS_EVENT_TRIGGER(fcinfo) \
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((fcinfo)->context != NULL && IsA((fcinfo)->context, EventTriggerData))
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extern Oid CreateEventTrigger(CreateEventTrigStmt *stmt);
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extern Oid get_event_trigger_oid(const char *trigname, bool missing_ok);
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extern Oid AlterEventTrigger(AlterEventTrigStmt *stmt);
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extern ObjectAddress AlterEventTriggerOwner(const char *name, Oid newOwnerId);
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extern void AlterEventTriggerOwner_oid(Oid, Oid newOwnerId);
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extern bool EventTriggerSupportsObjectType(ObjectType obtype);
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extern bool EventTriggerSupportsObject(const ObjectAddress *object);
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extern void EventTriggerDDLCommandStart(Node *parsetree);
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extern void EventTriggerDDLCommandEnd(Node *parsetree);
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extern void EventTriggerSQLDrop(Node *parsetree);
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extern void EventTriggerTableRewrite(Node *parsetree, Oid tableOid, int reason);
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extern void EventTriggerOnLogin(void);
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extern bool EventTriggerBeginCompleteQuery(void);
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extern void EventTriggerEndCompleteQuery(void);
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extern bool trackDroppedObjectsNeeded(void);
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extern void EventTriggerSQLDropAddObject(const ObjectAddress *object,
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bool original, bool normal);
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extern void EventTriggerInhibitCommandCollection(void);
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extern void EventTriggerUndoInhibitCommandCollection(void);
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extern void EventTriggerCollectSimpleCommand(ObjectAddress address,
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ObjectAddress secondaryObject,
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Node *parsetree);
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extern void EventTriggerAlterTableStart(Node *parsetree);
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extern void EventTriggerAlterTableRelid(Oid objectId);
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extern void EventTriggerCollectAlterTableSubcmd(Node *subcmd,
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ObjectAddress address);
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extern void EventTriggerAlterTableEnd(void);
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extern void EventTriggerCollectGrant(InternalGrant *istmt);
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extern void EventTriggerCollectAlterOpFam(AlterOpFamilyStmt *stmt,
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Oid opfamoid, List *operators,
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List *procedures);
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extern void EventTriggerCollectCreateOpClass(CreateOpClassStmt *stmt,
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Oid opcoid, List *operators,
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List *procedures);
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extern void EventTriggerCollectAlterTSConfig(AlterTSConfigurationStmt *stmt,
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Oid cfgId, Oid *dictIds, int ndicts);
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extern void EventTriggerCollectAlterDefPrivs(AlterDefaultPrivilegesStmt *stmt);
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#endif /* EVENT_TRIGGER_H */
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