greenplumn IMDTrigger 源码
greenplumn IMDTrigger 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/md/IMDTrigger.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// IMDTrigger.h
//
// @doc:
// Interface for triggers in the metadata cache
//---------------------------------------------------------------------------
#ifndef GPMD_IMDTrigger_H
#define GPMD_IMDTrigger_H
#include "gpos/base.h"
#include "naucrates/md/IMDCacheObject.h"
namespace gpmd
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// IMDTrigger
//
// @doc:
// Interface for triggers in the metadata cache
//
//---------------------------------------------------------------------------
class IMDTrigger : public IMDCacheObject
{
public:
// object type
Emdtype
MDType() const override
{
return EmdtTrigger;
}
// does trigger execute on a row-level
virtual BOOL ExecutesOnRowLevel() const = 0;
// is this a before trigger
virtual BOOL IsBefore() const = 0;
// is this an insert trigger
virtual BOOL IsInsert() const = 0;
// is this a delete trigger
virtual BOOL IsDelete() const = 0;
// is this an update trigger
virtual BOOL IsUpdate() const = 0;
// relation mdid
virtual IMDId *GetRelMdId() const = 0;
// function mdid
virtual IMDId *FuncMdId() const = 0;
// is trigger enabled
virtual BOOL IsEnabled() const = 0;
};
} // namespace gpmd
#endif // !GPMD_IMDTrigger_H
// EOF
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