this.uniqueWithDuplicateNulls = irg.isUniqueWithDuplicateNulls();
this.hasDeferrableChecking = false; // N/A such indexes are not shared
this.uniqueDeferrable = false; // N/A
this.initiallyDeferred = false; // N/A
this.constraintType = -1; // N/A
this.indexType = irg.indexType();
this.columnNames = srcCD.getColumnNames();
this.isAscending = irg.isAscending();
this.isConstraint = srcCD.isConstraint();
this.conglomerateUUID = srcCD.getUUID();
this.properties = properties;