01: /*
02:
03: Derby - Class org.apache.derby.iapi.sql.LanguageProperties
04:
05: Licensed to the Apache Software Foundation (ASF) under one or more
06: contributor license agreements. See the NOTICE file distributed with
07: this work for additional information regarding copyright ownership.
08: The ASF licenses this file to you under the Apache License, Version 2.0
09: (the "License"); you may not use this file except in compliance with
10: the License. You may obtain a copy of the License at
11:
12: http://www.apache.org/licenses/LICENSE-2.0
13:
14: Unless required by applicable law or agreed to in writing, software
15: distributed under the License is distributed on an "AS IS" BASIS,
16: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17: See the License for the specific language governing permissions and
18: limitations under the License.
19:
20: */
21:
22: package org.apache.derby.iapi.sql;
23:
24: /**
25: * This is a holder of language properties that are
26: * exposed users. Consolodate all properties here.
27: */
28: public interface LanguageProperties {
29: /*
30: ** BulkFetch
31: **
32: ** The default size needs some explaining. As
33: ** of 7/14/98, the most efficient way for access
34: ** to return rows from a table is basically by
35: ** reading/qualifying/returning all the rows in
36: ** one page. If you are read in many many rows
37: ** at a time the performance gain is only marginally
38: ** better. Anyway, since even a small number of
39: ** rows per read helps, and since there is no good
40: ** way to get access to retrieve the rows page
41: ** by page, we use 16 totally arbitrarily. Ultimately,
42: ** this should be dynamically sized -- in which
43: ** case we wouldn't need this default.
44: */
45: static final String BULK_FETCH_PROP = "derby.language.bulkFetchDefault";
46: static final String BULK_FETCH_DEFAULT = "16";
47: static final int BULK_FETCH_DEFAULT_INT = 16;
48: }
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