text: /*-------------------------------------------------------------------------
   *
   * hashdesc.c
   *	  rmgr descriptor routines for access/hash/hash.c
   *
   * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
   * Portions Copyright (c) 1994, Regents of the University of California
   *
   *
   * IDENTIFICATION
   *	  src/backend/access/rmgrdesc/hashdesc.c
   *
   *-------------------------------------------------------------------------
   */
  #include "postgres.h"
  
  #include "access/hash_xlog.h"
  
  void
  hash_desc(StringInfo buf, XLogReaderState *record)
  {
  	char	   *rec = XLogRecGetData(record);
  	uint8		info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
  
  	switch (info)
  	{
  		case XLOG_HASH_INIT_META_PAGE:
  			{
  				xl_hash_init_meta_page *xlrec = (xl_hash_init_meta_page *) rec;
  
  				appendStringInfo(buf, "num_tuples %g, fillfactor %d",
  								 xlrec->num_tuples, xlrec->ffactor);
  				break;
  			}
  		case XLOG_HASH_INIT_BITMAP_PAGE:
  			{
  				xl_hash_init_bitmap_page *xlrec = (xl_hash_init_bitmap_page *) rec;
  
  				appendStringInfo(buf, "bmsize %d", xlrec->bmsize);
  				break;
  			}
  		case XLOG_HASH_INSERT:
  			{
  				xl_hash_insert *xlrec = (xl_hash_insert *) rec;
  
  				appendStringInfo(buf, "off %u", xlrec->offnum);
  				break;
  			}
  		case XLOG_HASH_ADD_OVFL_PAGE:
  			{
  				xl_hash_add_ovfl_page *xlrec = (xl_hash_add_ovfl_page *) rec;
  
  				appendStringInfo(buf, "bmsize %d, bmpage_found %c",
  						   xlrec->bmsize, (xlrec->bmpage_found) ? 'T' : 'F');
  				break;
  			}
  		case XLOG_HASH_SPLIT_ALLOCATE_PAGE:
  			{
  				xl_hash_split_allocate_page *xlrec = (xl_hash_split_allocate_page *) rec;
  
  				appendStringInfo(buf, "new_bucket %u, meta_page_masks_updated %c, issplitpoint_changed %c",
  								 xlrec->new_bucket,
  					(xlrec->flags & XLH_SPLIT_META_UPDATE_MASKS) ? 'T' : 'F',
  								 (xlrec->flags & XLH_SPLIT_META_UPDATE_SPLITPOINT) ? 'T' : 'F');
  				break;
  			}
  		case XLOG_HASH_SPLIT_COMPLETE:
  			{
  				xl_hash_split_complete *xlrec = (xl_hash_split_complete *) rec;
  
  				appendStringInfo(buf, "old_bucket_flag %u, new_bucket_flag %u",
  							 xlrec->old_bucket_flag, xlrec->new_bucket_flag);
  				break;
  			}
  		case XLOG_HASH_MOVE_PAGE_CONTENTS:
  			{
  				xl_hash_move_page_contents *xlrec = (xl_hash_move_page_contents *) rec;
  
  				appendStringInfo(buf, "ntups %d, is_primary %c",
  								 xlrec->ntups,
  								 xlrec->is_prim_bucket_same_wrt ? 'T' : 'F');
  				break;
  			}
  		case XLOG_HASH_SQUEEZE_PAGE:
  			{
  				xl_hash_squeeze_page *xlrec = (xl_hash_squeeze_page *) rec;
  
  				appendStringInfo(buf, "prevblkno %u, nextblkno %u, ntups %d, is_primary %c",
  								 xlrec->prevblkno,
  								 xlrec->nextblkno,
  								 xlrec->ntups,
  								 xlrec->is_prim_bucket_same_wrt ? 'T' : 'F');
  				break;
  			}
  		case XLOG_HASH_DELETE:
  			{
  				xl_hash_delete *xlrec = (xl_hash_delete *) rec;
  
  				appendStringInfo(buf, "clear_dead_marking %c, is_primary %c",
  								 xlrec->clear_dead_marking ? 'T' : 'F',
  								 xlrec->is_primary_bucket_page ? 'T' : 'F');
  				break;
  			}
  		case XLOG_HASH_UPDATE_META_PAGE:
  			{
  				xl_hash_update_meta_page *xlrec = (xl_hash_update_meta_page *) rec;
  
  				appendStringInfo(buf, "ntuples %g",
  								 xlrec->ntuples);
  				break;
  			}
  		case XLOG_HASH_VACUUM_ONE_PAGE:
  			{
  				xl_hash_vacuum_one_page *xlrec = (xl_hash_vacuum_one_page *) rec;
  
  				appendStringInfo(buf, "ntuples %d",
  								 xlrec->ntuples);
  				break;
  			}
  	}
  }
  
  const char *
  hash_identify(uint8 info)
  {
  	const char *id = NULL;
  
  	switch (info & ~XLR_INFO_MASK)
  	{
  		case XLOG_HASH_INIT_META_PAGE:
  			id = "INIT_META_PAGE";
  			break;
  		case XLOG_HASH_INIT_BITMAP_PAGE:
  			id = "INIT_BITMAP_PAGE";
  			break;
  		case XLOG_HASH_INSERT:
  			id = "INSERT";
  			break;
  		case XLOG_HASH_ADD_OVFL_PAGE:
  			id = "ADD_OVFL_PAGE";
  			break;
  		case XLOG_HASH_SPLIT_ALLOCATE_PAGE:
  			id = "SPLIT_ALLOCATE_PAGE";
  			break;
  		case XLOG_HASH_SPLIT_PAGE:
  			id = "SPLIT_PAGE";
  			break;
  		case XLOG_HASH_SPLIT_COMPLETE:
  			id = "SPLIT_COMPLETE";
  			break;
  		case XLOG_HASH_MOVE_PAGE_CONTENTS:
  			id = "MOVE_PAGE_CONTENTS";
  			break;
  		case XLOG_HASH_SQUEEZE_PAGE:
  			id = "SQUEEZE_PAGE";
  			break;
  		case XLOG_HASH_DELETE:
  			id = "DELETE";
  			break;
  		case XLOG_HASH_SPLIT_CLEANUP:
  			id = "SPLIT_CLEANUP";
  			break;
  		case XLOG_HASH_UPDATE_META_PAGE:
  			id = "UPDATE_META_PAGE";
  			break;
  		case XLOG_HASH_VACUUM_ONE_PAGE:
  			id = "VACUUM_ONE_PAGE";
  	}
  
  	return id;
  }
  