should be it

external/duckdb/third_party/tpce-tool/include/main/BaseLoader.h

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+/*
+ * Legal Notice
+ *
+ * This document and associated source code (the "Work") is a part of a
+ * benchmark specification maintained by the TPC.
+ *
+ * The TPC reserves all right, title, and interest to the Work as provided
+ * under U.S. and international laws, including without limitation all patent
+ * and trademark rights therein.
+ *
+ * No Warranty
+ *
+ * 1.1 TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE INFORMATION
+ *     CONTAINED HEREIN IS PROVIDED "AS IS" AND WITH ALL FAULTS, AND THE
+ *     AUTHORS AND DEVELOPERS OF THE WORK HEREBY DISCLAIM ALL OTHER
+ *     WARRANTIES AND CONDITIONS, EITHER EXPRESS, IMPLIED OR STATUTORY,
+ *     INCLUDING, BUT NOT LIMITED TO, ANY (IF ANY) IMPLIED WARRANTIES,
+ *     DUTIES OR CONDITIONS OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR
+ *     PURPOSE, OF ACCURACY OR COMPLETENESS OF RESPONSES, OF RESULTS, OF
+ *     WORKMANLIKE EFFORT, OF LACK OF VIRUSES, AND OF LACK OF NEGLIGENCE.
+ *     ALSO, THERE IS NO WARRANTY OR CONDITION OF TITLE, QUIET ENJOYMENT,
+ *     QUIET POSSESSION, CORRESPONDENCE TO DESCRIPTION OR NON-INFRINGEMENT
+ *     WITH REGARD TO THE WORK.
+ * 1.2 IN NO EVENT WILL ANY AUTHOR OR DEVELOPER OF THE WORK BE LIABLE TO
+ *     ANY OTHER PARTY FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO THE
+ *     COST OF PROCURING SUBSTITUTE GOODS OR SERVICES, LOST PROFITS, LOSS
+ *     OF USE, LOSS OF DATA, OR ANY INCIDENTAL, CONSEQUENTIAL, DIRECT,
+ *     INDIRECT, OR SPECIAL DAMAGES WHETHER UNDER CONTRACT, TORT, WARRANTY,
+ *     OR OTHERWISE, ARISING IN ANY WAY OUT OF THIS OR ANY OTHER AGREEMENT
+ *     RELATING TO THE WORK, WHETHER OR NOT SUCH AUTHOR OR DEVELOPER HAD
+ *     ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
+ *
+ * Contributors
+ * - Sergey Vasilevskiy
+ * - Doug Johnson
+ */
+
+/*
+ *   Base interface for all loader classes.
+ */
+
+#ifndef BASE_LOADER_H
+#define BASE_LOADER_H
+
+namespace TPCE {
+
+template <typename T> class CBaseLoader {
+
+public:
+	/*
+	 *  Virtual destructor. Provided so that a sponsor-specific
+	 *  destructor can be called on destruction from the base-class pointer.
+	 *
+	 *  PARAMETERS:
+	 *           none.
+	 *
+	 *  RETURNS:
+	 *           not applicable.
+	 */
+	virtual ~CBaseLoader(){};
+
+	/*
+	 *  This function is provided to reset the loader to
+	 *  a clean state. "Clean state" here means a sequence of
+	 *  WriteNextRecord(), followed by Commit(), followed by FinishLoad()
+	 *  can be called.
+	 *
+	 *  PARAMETERS:
+	 *           none.
+	 *
+	 *  RETURNS:
+	 *           none.
+	 */
+	virtual void Init(){}; // default implementation is empty
+
+	/*
+	 *  Receive a new record to be loaded into the database.
+	 *  This is the main function that is called
+	 *  for every generated record.
+	 *
+	 *  Note: the records are not guaranteed to actually be inserted
+	 *  into the database after this call. It is Commit() that ensures that
+	 *  all records received by WriteNextRecord are persisted in the database.
+	 *
+	 *  PARAMETERS:
+	 *           IN  next_record          - a pointer to a structure, containing
+	 * the record
+	 *
+	 *  RETURNS:
+	 *           none.
+	 */
+	virtual void WriteNextRecord(const T &next_record) {
+		printf("BaseLoader - const ref\n");
+	};
+
+	/*
+	 *  Commit any records that might have been kept in temporary
+	 *  storage to the database. After this call, all records received
+	 *  by WriteNextRecord should be present in the database.
+	 *
+	 *  PARAMETERS:
+	 *           none.
+	 *
+	 *  RETURNS:
+	 *           none.
+	 */
+	virtual void Commit(){}; // default implementation is empty
+
+	/*
+	 *  Release any resources held for loading.
+	 *  Also, commit any records that might have been kept in temporary
+	 *  storage to the database.
+	 *  This function is called once, after the last record has been loaded.
+	 *
+	 *  PARAMETERS:
+	 *           none.
+	 *
+	 *  RETURNS:
+	 *           none.
+	 */
+	virtual void FinishLoad() = 0; // must be defined in subclasses
+};
+
+} // namespace TPCE
+
+#endif // #ifndef BASE_LOADER_H