pg_dump: Reorganize dumpBaseType()

Along the same lines as ed2c7f6 and daa9fe8, reduce code duplication
by having just one copy of the parts of the query that are the same
across all server versions; and make the conditionals control the
smallest possible amount of code.  This is in preparation for adding
another dumpable field to pg_type.

Author: tglsfdc

src/bin/pg_dump/pg_dump.c

@@ -10810,79 +10810,47 @@ dumpBaseType(Archive *fout, TypeInfo *tyinfo)
 	bool		typdefault_is_literal = false;
 
 	/* Fetch type-specific details */
+	appendPQExpBufferStr(query, "SELECT typlen, "
+						 "typinput, typoutput, typreceive, typsend, "
+						 "typreceive::pg_catalog.oid AS typreceiveoid, "
+						 "typsend::pg_catalog.oid AS typsendoid, "
+						 "typanalyze, "
+						 "typanalyze::pg_catalog.oid AS typanalyzeoid, "
+						 "typdelim, typbyval, typalign, typstorage, ");
+
+	if (fout->remoteVersion >= 80300)
+		appendPQExpBufferStr(query,
+							 "typmodin, typmodout, "
+							 "typmodin::pg_catalog.oid AS typmodinoid, "
+							 "typmodout::pg_catalog.oid AS typmodoutoid, ");
+	else
+		appendPQExpBufferStr(query,
+							 "'-' AS typmodin, '-' AS typmodout, "
+							 "0 AS typmodinoid, 0 AS typmodoutoid, ");
+
+	if (fout->remoteVersion >= 80400)
+		appendPQExpBufferStr(query,
+							 "typcategory, typispreferred, ");
+	else
+		appendPQExpBufferStr(query,
+							 "'U' AS typcategory, false AS typispreferred, ");
+
 	if (fout->remoteVersion >= 90100)
-	{
-		appendPQExpBuffer(query, "SELECT typlen, "
-						  "typinput, typoutput, typreceive, typsend, "
-						  "typmodin, typmodout, typanalyze, "
-						  "typreceive::pg_catalog.oid AS typreceiveoid, "
-						  "typsend::pg_catalog.oid AS typsendoid, "
-						  "typmodin::pg_catalog.oid AS typmodinoid, "
-						  "typmodout::pg_catalog.oid AS typmodoutoid, "
-						  "typanalyze::pg_catalog.oid AS typanalyzeoid, "
-						  "typcategory, typispreferred, "
-						  "typdelim, typbyval, typalign, typstorage, "
-						  "(typcollation <> 0) AS typcollatable, "
-						  "pg_catalog.pg_get_expr(typdefaultbin, 0) AS typdefaultbin, typdefault "
-						  "FROM pg_catalog.pg_type "
-						  "WHERE oid = '%u'::pg_catalog.oid",
-						  tyinfo->dobj.catId.oid);
-	}
-	else if (fout->remoteVersion >= 80400)
-	{
-		appendPQExpBuffer(query, "SELECT typlen, "
-						  "typinput, typoutput, typreceive, typsend, "
-						  "typmodin, typmodout, typanalyze, "
-						  "typreceive::pg_catalog.oid AS typreceiveoid, "
-						  "typsend::pg_catalog.oid AS typsendoid, "
-						  "typmodin::pg_catalog.oid AS typmodinoid, "
-						  "typmodout::pg_catalog.oid AS typmodoutoid, "
-						  "typanalyze::pg_catalog.oid AS typanalyzeoid, "
-						  "typcategory, typispreferred, "
-						  "typdelim, typbyval, typalign, typstorage, "
-						  "false AS typcollatable, "
-						  "pg_catalog.pg_get_expr(typdefaultbin, 0) AS typdefaultbin, typdefault "
-						  "FROM pg_catalog.pg_type "
-						  "WHERE oid = '%u'::pg_catalog.oid",
-						  tyinfo->dobj.catId.oid);
-	}
-	else if (fout->remoteVersion >= 80300)
-	{
-		/* Before 8.4, pg_get_expr does not allow 0 for its second arg */
-		appendPQExpBuffer(query, "SELECT typlen, "
-						  "typinput, typoutput, typreceive, typsend, "
-						  "typmodin, typmodout, typanalyze, "
-						  "typreceive::pg_catalog.oid AS typreceiveoid, "
-						  "typsend::pg_catalog.oid AS typsendoid, "
-						  "typmodin::pg_catalog.oid AS typmodinoid, "
-						  "typmodout::pg_catalog.oid AS typmodoutoid, "
-						  "typanalyze::pg_catalog.oid AS typanalyzeoid, "
-						  "'U' AS typcategory, false AS typispreferred, "
-						  "typdelim, typbyval, typalign, typstorage, "
-						  "false AS typcollatable, "
-						  "pg_catalog.pg_get_expr(typdefaultbin, 'pg_catalog.pg_type'::pg_catalog.regclass) AS typdefaultbin, typdefault "
-						  "FROM pg_catalog.pg_type "
-						  "WHERE oid = '%u'::pg_catalog.oid",
-						  tyinfo->dobj.catId.oid);
-	}
+		appendPQExpBufferStr(query, "(typcollation <> 0) AS typcollatable, ");
 	else
-	{
-		appendPQExpBuffer(query, "SELECT typlen, "
-						  "typinput, typoutput, typreceive, typsend, "
-						  "'-' AS typmodin, '-' AS typmodout, "
-						  "typanalyze, "
-						  "typreceive::pg_catalog.oid AS typreceiveoid, "
-						  "typsend::pg_catalog.oid AS typsendoid, "
-						  "0 AS typmodinoid, 0 AS typmodoutoid, "
-						  "typanalyze::pg_catalog.oid AS typanalyzeoid, "
-						  "'U' AS typcategory, false AS typispreferred, "
-						  "typdelim, typbyval, typalign, typstorage, "
-						  "false AS typcollatable, "
-						  "pg_catalog.pg_get_expr(typdefaultbin, 'pg_catalog.pg_type'::pg_catalog.regclass) AS typdefaultbin, typdefault "
-						  "FROM pg_catalog.pg_type "
-						  "WHERE oid = '%u'::pg_catalog.oid",
-						  tyinfo->dobj.catId.oid);
-	}
+		appendPQExpBufferStr(query, "false AS typcollatable, ");
+
+	/* Before 8.4, pg_get_expr does not allow 0 for its second arg */
+	if (fout->remoteVersion >= 80400)
+		appendPQExpBufferStr(query,
+							 "pg_catalog.pg_get_expr(typdefaultbin, 0) AS typdefaultbin, typdefault ");
+	else
+		appendPQExpBufferStr(query,
+							 "pg_catalog.pg_get_expr(typdefaultbin, 'pg_catalog.pg_type'::pg_catalog.regclass) AS typdefaultbin, typdefault ");
+
+	appendPQExpBuffer(query, "FROM pg_catalog.pg_type "
+					  "WHERE oid = '%u'::pg_catalog.oid",
+					  tyinfo->dobj.catId.oid);
 
 	res = ExecuteSqlQueryForSingleRow(fout, query->data);