Symbian3/PDK/Source/GUID-F5B0FE6A-6DE6-56B5-89A5-684CD2602B40.dita
author Dominic Pinkman <Dominic.Pinkman@Nokia.com>
Thu, 11 Mar 2010 18:02:22 +0000
changeset 3 46218c8b8afa
parent 1 25a17d01db0c
child 5 f345bda72bc4
permissions -rw-r--r--
week 10 bug fix submission (SF PDK version): Bug 1892, Bug 1897, Bug 1319. Also 3 or 4 documents were found to contain code blocks with SFL, which has been fixed. Partial fix for broken links, links to Forum Nokia, and the 'Symbian platform' terminology issues.

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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
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<!-- Initial Contributors:
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<!DOCTYPE concept
  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
<concept xml:lang="en" id="GUID-F5B0FE6A-6DE6-56B5-89A5-684CD2602B40"><title>Implementation limits</title><prolog><metadata><keywords/></metadata></prolog><conbody><p>The number of tables in a database is limited only by available resources.</p> <p>The number of columns in a table is usually limited by a maximum record size of 8200 bytes (just over 8Kb), e.g. a table could have 64K not-null <codeph>Bit</codeph> columns, 32 <codeph>Text8[255]</codeph> columns, 100 <codeph>Text8[80]</codeph> columns, or 32 <codeph>LongText8</codeph> columns. </p> <p>Each table can have up to 32 indexes. Index keys can contain any number of key columns, but the total size of the key must not exceed 248 bytes for unique indexes, and 244 bytes for non-unique indexes.</p> <p>The number of rows in a table is practically limited by available resources.</p> <p>The maximum size of a transaction is limited by available memory.</p> <section><title>See also</title> <p><xref href="GUID-47419CFB-163D-5A4E-8A00-C73773353BDF.dita">Column type characteristics</xref> and <xref href="GUID-785B2F0B-E7E6-5DAE-98F1-6C32BED25964.dita">Database storage overhead</xref>.</p> </section> </conbody></concept>