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81 lines
3.6 KiB
Plaintext
81 lines
3.6 KiB
Plaintext
********************************************************************************
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LIST OF KNOWN INCOMPATIBILITIES
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between versions 2.x and 2.5
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********************************************************************************
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This document describes all the changes that make v2.5 incompatible in any way
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as compared with the previous releases and hence could affect your databases and
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applications.
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Please read the below descriptions carefully before upgrading your software to
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the new Firebird version.
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INSTALLATION/CONFIGURATION
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--------------------------
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* The database migration process might require some special steps. If the
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database restore fails with the error "malformed string" for you, please
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pay attention to the files in the /misc/upgrade/metadata directory of your
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installation and use the new -fix_fss_data and -fix_fss_metadata command
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line switches of GBAK.
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* Priorly deprecated parameters OldParameterOrdering and CreateInternalWindow
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of firebird.conf are not supported anymore and have been removed.
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* Parameters LockSemCount and LockSignal of firebird.conf don't require tuning
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in the new lock manager implementation, so they have been removed as well.
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* Now Firebird is relocatable in POSIX environments. That means the installation
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directory is based on Firebird executables and libraries, and libraries are not
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hard-coded loaded from /opt/firebird/lib. If you used to copy utilities to
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different places and rely on libraries being loaded from /opt/firebird, that
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will not work any more. The correct approach would be the creation of symbolic
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links.
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SQL SYNTAX
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--------------------------
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* A number of new reserved keywords are introduced. The full list is available
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here: /doc/sql.extentions/README.keywords. Please ensure your DSQL
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statements and procedure/trigger sources don't contain those keywords as
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identifiers. Otherwise, you'll need to either use them quoted (in Dialect 3
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only) or rename them.
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SQL EXECUTION RESULTS
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--------------------------
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* Malformed UNICODE_FSS strings and blobs are no longer allowed.
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* Prior to Firebird 2.5 the SET clause of the UPDATE statement assigned
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columns in the user-defined order with the NEW column values being
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immediately accessible to the subsequent assignments. This did not
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conform to the SQL standard. Starting with Firebird 2.5, only OLD column
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values are accessible to all the assignments of the SET clause.
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You can revert back to the legacy behavior via the OldSetClauseSemantics
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parameter of firebird.conf, if required. Please be aware that this parameter
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is provided as a temporary solution for backward compatibility issues and
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will be deprecated in future Firebird versions.
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UTILITIES
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--------------------------
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* fb_lock_print now requires a database path name in order to print the lock table.
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Use a "-d <path name>" command line switch to specify a database to analyze.
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API
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--------------------------
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* Inappropriate TPB (transaction parameter buffer) contents is now rejected
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by isc_start_transaction() and isc_start_multiple() API routines. For example,
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it's not allowed to specify "no wait" and non-zero "wait timeout" options
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together, neither it's possible to specify "no record version" mode along
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with "snapshot" transaction isolation mode, etc.
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SECURITY
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--------------------------
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* Members of administrative Windows groups are not mapped to SYSDBA any more
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by default. Mapping is controlled on per-database basis using SQL command
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ALTER ROLE RDB$ADMIN SET/DROP AUTO ADMIN MAPPING.
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See README.trusted_authentication for details.
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