*** src/backend/commands/analyze.c
--- src/backend/commands/analyze.c	2008-05-16 00:47:00.000000000 +0200
***************
*** 1321,1330 ****
  
  				arry = construct_array(stats->stavalues[k],
  									   stats->numvalues[k],
! 									   stats->attr->atttypid,
! 									   stats->attrtype->typlen,
! 									   stats->attrtype->typbyval,
! 									   stats->attrtype->typalign);
  				values[i++] = PointerGetDatum(arry);	/* stavaluesN */
  			}
  			else
--- 1321,1330 ----
  
  				arry = construct_array(stats->stavalues[k],
  									   stats->numvalues[k],
! 									   stats->statypid[k],
! 									   stats->statyplen[k],
! 									   stats->statypbyval[k],
! 									   stats->statypalign[k]);
  				values[i++] = PointerGetDatum(arry);	/* stavaluesN */
  			}
  			else
***************
*** 1854,1859 ****
--- 1854,1867 ----
  			stats->numnumbers[0] = num_mcv;
  			stats->stavalues[0] = mcv_values;
  			stats->numvalues[0] = num_mcv;
+ 			/*
+ 			 * MCV entries have the same element type as the analyzed
+ 			 * attribute.
+ 			 */
+ 			stats->statypid[0] = stats->attr->atttypid;
+ 			stats->statyplen[0] = stats->attrtype->typlen;
+ 			stats->statypbyval[0] = stats->attrtype->typbyval;
+ 			stats->statypalign[0] = stats->attrtype->typalign;
  		}
  	}
  	else if (null_cnt > 0)
***************
*** 2197,2202 ****
--- 2205,2218 ----
  			stats->numnumbers[slot_idx] = num_mcv;
  			stats->stavalues[slot_idx] = mcv_values;
  			stats->numvalues[slot_idx] = num_mcv;
+ 			/*
+ 			 * MCV entries have the same element type as the analyzed
+ 			 * attribute.
+ 			 */
+ 			stats->statypid[slot_idx] = stats->attr->atttypid;
+ 			stats->statyplen[slot_idx] = stats->attrtype->typlen;
+ 			stats->statypbyval[slot_idx] = stats->attrtype->typbyval;
+ 			stats->statypalign[slot_idx] = stats->attrtype->typalign;
  			slot_idx++;
  		}
  
***************
*** 2281,2286 ****
--- 2297,2310 ----
  			stats->staop[slot_idx] = mystats->ltopr;
  			stats->stavalues[slot_idx] = hist_values;
  			stats->numvalues[slot_idx] = num_hist;
+ 			/*
+ 			 * Histogram entries have the same element type as the analyzed
+ 			 * attribute.
+ 			 */
+ 			stats->statypid[slot_idx] = stats->attr->atttypid;
+ 			stats->statyplen[slot_idx] = stats->attrtype->typlen;
+ 			stats->statypbyval[slot_idx] = stats->attrtype->typbyval;
+ 			stats->statypalign[slot_idx] = stats->attrtype->typalign;
  			slot_idx++;
  		}
  
*** src/include/commands/vacuum.h
--- src/include/commands/vacuum.h	2008-05-16 00:47:09.000000000 +0200
***************
*** 94,99 ****
--- 94,119 ----
  	Datum	   *stavalues[STATISTIC_NUM_SLOTS];
  
  	/*
+ 	 * These fields describe the stavalues[n] element types. They will
+ 	 * typically be the same as the column's that's underlying the slot, but
+ 	 * sometimes a custom typanalyze function might want to store an array of
+ 	 * something other that the analyzed column's elements. This must be filled
+ 	 * in by the compute_stats routine.
+ 	 *
+ 	 * XXX or maybe fall back on attrtype-> stuff when these are NULL? That way
+ 	 * we won't break other people's custom typanalyze functions. Not sure if
+ 	 * any exist, though.
+ 	 *
+ 	 * Another concern is that typlen, typbyval and typalign are reduntant
+ 	 * given the OID. But the caller is in better position to cache this so
+ 	 * maybe we shouldn't worry about it?
+ 	 */
+ 	Oid			statypid[STATISTIC_NUM_SLOTS];
+ 	int2		statyplen[STATISTIC_NUM_SLOTS];
+ 	bool		statypbyval[STATISTIC_NUM_SLOTS];
+ 	char		statypalign[STATISTIC_NUM_SLOTS];
+ 
+ 	/*
  	 * These fields are private to the main ANALYZE code and should not be
  	 * looked at by type-specific functions.
  	 */