Micro-opt: replace calls like

    appendStringInfo(buf, "%s", str);
with
    appendStringInfoString(buf, str);
as the latter form is slightly faster.

src/backend/commands/explain.c

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1994-5, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/commands/explain.c,v 1.118 2003/11/29 19:51:47 pgsql Exp $
+ *	  $PostgreSQL: pgsql/src/backend/commands/explain.c,v 1.119 2004/01/31 05:09:40 neilc Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1002,7 +1002,7 @@ show_sort_keys(List *tlist, int nkeys, AttrNumber *keycols,
 		/* And add to str */
 		if (keyno > 0)
 			appendStringInfo(str, ", ");
-		appendStringInfo(str, "%s", exprstr);
+		appendStringInfoString(str, exprstr);
 	}
 
 	appendStringInfo(str, "\n");

src/backend/nodes/outfuncs.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.231 2004/01/22 00:34:31 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.232 2004/01/31 05:09:40 neilc Exp $
  *
  * NOTES
  *	  Every node type that can appear in stored rules' parsetrees *must*
@@ -1427,7 +1427,7 @@ _outValue(StringInfo str, Value *value)
 			 * We assume the value is a valid numeric literal and so does
 			 * not need quoting.
 			 */
-			appendStringInfo(str, "%s", value->val.str);
+			appendStringInfoString(str, value->val.str);
 			break;
 		case T_String:
 			appendStringInfoChar(str, '"');
@@ -1436,7 +1436,7 @@ _outValue(StringInfo str, Value *value)
 			break;
 		case T_BitString:
 			/* internal representation already has leading 'b' */
-			appendStringInfo(str, "%s", value->val.str);
+			appendStringInfoString(str, value->val.str);
 			break;
 		default:
 			elog(ERROR, "unrecognized node type: %d", (int) value->type);

src/backend/utils/adt/regproc.c

@@ -13,7 +13,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/regproc.c,v 1.85 2003/11/29 19:51:59 pgsql Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/regproc.c,v 1.86 2004/01/31 05:09:40 neilc Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -340,7 +340,7 @@ format_procedure(Oid procedure_oid)
 
 			if (i > 0)
 				appendStringInfoChar(&buf, ',');
-			appendStringInfo(&buf, "%s", format_type_be(thisargtype));
+			appendStringInfoString(&buf, format_type_be(thisargtype));
 		}
 		appendStringInfoChar(&buf, ')');
 

src/backend/utils/adt/ruleutils.c

@@ -3,7 +3,7 @@
  *				back to source text
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.161 2003/12/28 21:57:37 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.162 2004/01/31 05:09:40 neilc Exp $
  *
  *	  This software is copyrighted by Jan Wieck - Hamburg.
  *
@@ -752,7 +752,7 @@ pg_get_indexdef_worker(Oid indexrelid, int colno, int prettyFlags)
 
 			attname = get_relid_attribute_name(indrelid, attnum);
 			if (!colno || colno == keyno + 1)
-				appendStringInfo(&buf, "%s", quote_identifier(attname));
+				appendStringInfoString(&buf, quote_identifier(attname));
 			keycoltype = get_atttype(indrelid, attnum);
 		}
 		else
@@ -772,7 +772,7 @@ pg_get_indexdef_worker(Oid indexrelid, int colno, int prettyFlags)
 				/* Need parens if it's not a bare function call */
 				if (indexkey && IsA(indexkey, FuncExpr) &&
 					((FuncExpr *) indexkey)->funcformat == COERCE_EXPLICIT_CALL)
-					appendStringInfo(&buf, "%s", str);
+					appendStringInfoString(&buf, str);
 				else
 					appendStringInfo(&buf, "(%s)", str);
 			}
@@ -947,7 +947,7 @@ pg_get_constraintdef_worker(Oid constraintId, int prettyFlags)
 						string = "";	/* keep compiler quiet */
 						break;
 				}
-				appendStringInfo(&buf, "%s", string);
+				appendStringInfoString(&buf, string);
 
 				/* Add ON UPDATE and ON DELETE clauses, if needed */
 				switch (conForm->confupdtype)
@@ -1126,11 +1126,9 @@ decompile_column_index_array(Datum column_index_array, Oid relId,
 		colName = get_relid_attribute_name(relId, DatumGetInt16(keys[j]));
 
 		if (j == 0)
-			appendStringInfo(buf, "%s",
-							 quote_identifier(colName));
+			appendStringInfoString(buf, quote_identifier(colName));
 		else
-			appendStringInfo(buf, ", %s",
-							 quote_identifier(colName));
+			appendStringInfo(buf, ", %s", quote_identifier(colName));
 	}
 }
 
@@ -2134,7 +2132,7 @@ get_insert_query_def(Query *query, deparse_context *context)
 
 		appendStringInfo(buf, sep);
 		sep = ", ";
-		appendStringInfo(buf, "%s",
+		appendStringInfoString(buf,
 							   quote_identifier(get_relid_attribute_name(rte->relid,
 																		 tle->resdom->resno)));
 	}
@@ -2753,7 +2751,7 @@ get_rule_expr(Node *node, deparse_context *context,
 										 quote_identifier(refname));
 				}
 				if (attname)
-					appendStringInfo(buf, "%s", quote_identifier(attname));
+					appendStringInfoString(buf, quote_identifier(attname));
 				else
 					appendStringInfo(buf, "*");
 			}
@@ -3763,7 +3761,7 @@ get_from_clause_item(Node *jtnode, Query *query, deparse_context *context)
 				{
 					if (col != rte->alias->colnames)
 						appendStringInfo(buf, ", ");
-					appendStringInfo(buf, "%s",
+					appendStringInfoString(buf,
 										   quote_identifier(strVal(lfirst(col))));
 				}
 				appendStringInfoChar(buf, ')');
@@ -3902,7 +3900,7 @@ get_from_clause_item(Node *jtnode, Query *query, deparse_context *context)
 				{
 					if (col != j->using)
 						appendStringInfo(buf, ", ");
-					appendStringInfo(buf, "%s",
+					appendStringInfoString(buf,
 								quote_identifier(strVal(lfirst(col))));
 				}
 				appendStringInfoChar(buf, ')');
@@ -3934,7 +3932,7 @@ get_from_clause_item(Node *jtnode, Query *query, deparse_context *context)
 				{
 					if (col != j->alias->colnames)
 						appendStringInfo(buf, ", ");
-					appendStringInfo(buf, "%s",
+					appendStringInfoString(buf,
 								  quote_identifier(strVal(lfirst(col))));
 				}
 				appendStringInfoChar(buf, ')');
@@ -4164,7 +4162,7 @@ quote_qualified_identifier(const char *namespace,
 	initStringInfo(&buf);
 	if (namespace)
 		appendStringInfo(&buf, "%s.", quote_identifier(namespace));
-	appendStringInfo(&buf, "%s", quote_identifier(ident));
+	appendStringInfoString(&buf, quote_identifier(ident));
 	return buf.data;
 }
 
@@ -4316,7 +4314,7 @@ generate_operator_name(Oid operid, Oid arg1, Oid arg2)
 		appendStringInfo(&buf, "OPERATOR(%s.", quote_identifier(nspname));
 	}
 
-	appendStringInfo(&buf, "%s", oprname);
+	appendStringInfoString(&buf, oprname);
 
 	if (nspname)
 		appendStringInfoChar(&buf, ')');
@@ -4338,7 +4336,7 @@ print_operator_name(StringInfo buf, List *opname)
 	int			nnames = length(opname);
 
 	if (nnames == 1)
-		appendStringInfo(buf, "%s", strVal(lfirst(opname)));
+		appendStringInfoString(buf, strVal(lfirst(opname)));
 	else
 	{
 		appendStringInfo(buf, "OPERATOR(");

src/backend/utils/adt/varlena.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/varlena.c,v 1.110 2004/01/31 00:45:21 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/varlena.c,v 1.111 2004/01/31 05:09:40 neilc Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -2232,7 +2232,7 @@ array_to_text(PG_FUNCTION_ARGS)
 		if (i > 0)
 			appendStringInfo(result_str, "%s%s", fldsep, value);
 		else
-			appendStringInfo(result_str, "%s", value);
+			appendStringInfoString(result_str, value);
 
 		p = att_addlength(p, typlen, PointerGetDatum(p));
 		p = (char *) att_align(p, typalign);

src/backend/utils/misc/guc.c

@@ -10,7 +10,7 @@
  * Written by Peter Eisentraut <peter_e@gmx.net>.
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.181 2004/01/26 22:35:32 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.182 2004/01/31 05:09:41 neilc Exp $
  *
  *--------------------------------------------------------------------
  */
@@ -3259,7 +3259,7 @@ flatten_set_variable_args(const char *name, List *args)
 				break;
 			case T_Float:
 				/* represented as a string, so just copy it */
-				appendStringInfo(&buf, "%s", strVal(&arg->val));
+				appendStringInfoString(&buf, strVal(&arg->val));
 				break;
 			case T_String:
 				val = strVal(&arg->val);
@@ -3293,9 +3293,9 @@ flatten_set_variable_args(const char *name, List *args)
 					 * mode, quote it if it's not a vanilla identifier.
 					 */
 					if (flags & GUC_LIST_QUOTE)
-						appendStringInfo(&buf, "%s", quote_identifier(val));
+						appendStringInfoString(&buf, quote_identifier(val));
 					else
-						appendStringInfo(&buf, "%s", val);
+						appendStringInfoString(&buf, val);
 				}
 				break;
 			default: