Caché Upgrade Checklists - InterSystems Documentation

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Caché 2007.1 Upgrade Checklist 2.2.2.5 TuneTable And KeepUpToDate Flag Caché provides the ability to gather statistics about the contents of a table to assist in optimizing queries. The method that can be invoked by applications at runtime is: $SYSTEM.SQL.TuneTable. The fifth parameter of $SYSTEM.SQL.TuneTable is the KeepUpToDate flag. If this flag is set to 1, Caché des not mark the classes and tables as out of date when it modifies the values for ExtentSize and the Selectivity. In Version 2007.1, KeepUpToDate has been extended to influence cached queries. If KeepUpToDate is set to 1, Caché will not purge cached queries as part of the TuneTable. If the flag is 0, the default, then the class is marked as not up to date and all cached queries based on the table are purged. Running TuneTable on a live system with KeepUpToDate = 0 can cause application errors if the appllication is using any queries that are removed from the cache. 2.2.2.6 Changes For Sybase / SQL Server Compatibility The following changes have been made to Caché for compatibility with Sybase and SQL Server: • the command, TRUNCATE TABLE, has been added • six new functions are now available for use in expressions: CHARINDEX, DATALENGTH, REPLACE, STUFF, and SYSDATE • two additions have been made to the list of reserved words: SYSDATE, and STATISTICS 2.2.2.7 New DDL Datatype Mappings As of this version, the following new datatype mappings have been added to the system set of datatype maps: External Type BINARY VARYING BINARY CHAR VARYING CHARACTER VARYING NATIONAL CHAR VARYING NATIONAL CHARACTER VARYING NATIONAL VARCHAR VARBINARY VARCHAR Maps In Caché To %Library.Binary(MAXLEN=1) %Library.Binary(MAXLEN=1) %Library.String(MAXLEN=1) %Library.String(MAXLEN=1) %Library.String(MAXLEN=1) %Library.String(MAXLEN=1) %Library.String(MAXLEN=1) %Library.Binary(MAXLEN=1) %Library.String(MAXLEN=1) 18 Caché Upgrade Checklists
Developers 2.2.2.8 Statement Changes The following is a short list of changes to statement parsing. Please refer to the SQL Reference manual for further information. • The INTO keyword is now optional on an INSERT statement • The UPDATE and DELETE statements now allow a new FROM clause to support multi-table selection criteria • The FROM keyword is now optional in a DELETE statement 2.2.2.9 Operator / Predicate Changes The following are new in version 2007.1: • The LIKE predicate supports letter case collation • %CONTAINSTERM has been added as a new comparison operator • 2.2.2.10 New Comment Syntax Caché SQL now supports multiline comments with the same /* ... */ syntax used bu Caché Objectscript. 2.2.3 Changes to %Text Class Stemming The %Text.English class uses the Porter stemmer, which is a widely used published algorithm for stemming English words. The published algorithm includes an amended method for stemming “-ed” word endings that has been used in all versions of the %Text.English class. In this version of Caché, the algorithm has been changed to restore the behavior of the originally published algorithm, because the amended algorithm does an inferior job on most words ending in “-ed” . This change affects what terms go into an index based on the %Text.English class, so any index that is not rebuilt across versions may experience slight differences with respect to text predicates on words ending in “-ed” . Important: It is recommended that you rebuild %Text.English text indexes that were created on prior versions of Caché. Otherwise, a word that could end in “-ed” might fail to match a different form of the word already in the index. Caché Upgrade Checklists 19
Page 1 and 2: Caché Upgrade Checklists Version 2
Page 3 and 4: Table of Contents Preface .........
Page 5 and 6: 4.2.6 Class Changes ...............
Page 7: Preface Purpose The purpose of this
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Page 17 and 18: Administrators 2.1.4 Increased Maxi
Page 19 and 20: Administrators Classname %SYS.Globa
Page 21 and 22: page table entry for every 4KB of m
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Page 29 and 30: First, CSP session data is no longe
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Page 35 and 36: Administrators An advantage of this
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Page 39 and 40: Administrators 4.1.9 Web Server Cha
Page 41 and 42: Administrators User data exported b
Page 43 and 44: Administrators • changed the defa
Page 45 and 46: Administrators 4.1.15.2 Compatible
Page 47 and 48: Administrators 4.1.18 Collation for
Page 49 and 50: This is insufficient to read the Ca
Page 51 and 52: %LegacyUnknownUser role or its remo
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Developers • If the stream is an
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Developers 4.2.6.19 Required Relati
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For those customers that have progr
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^mcq(“init code”) Execution Ord
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Developers REVOKE %THRESHOLD FROM S
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When looking at the list of procedu
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Developers 4.2.9.3 Globals Reorgani
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Developers Command Set View Permiss
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Developers Function Number 5 58 69
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Developers Function Number —1 —
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Developers - Retrieval Code 4.2.12
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Developers 4.2.15 Callin And Callou
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Operators 4.3.5 Cluster Member Star
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