ColumnInfo(PRUnichar* aName, PRInt32 aType, PRInt32 aSize, PRInt32 aMod, nsIRDFResource* aProperty)
ColumnInfo(PRUnichar* aName, PRInt32 aType, PRInt32 aSize, PRInt32 aMod, PRBool aIsPrimaryKey, nsIRDFResource* aProperty)
    ColumnInfo(PRUnichar* aName, PRInt32 aType, PRInt32 aSize, PRInt32 aMod, nsIRDFResource* aProperty)      : mName(aName),        mType(aType),        mSize(aSize),        mMod(aMod),	mProperty(aProperty) {      NS_IF_ADDREF(mProperty);    }