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The dbutil utility has been significantly enhanced as of B.07.00.
This document covers the new and improved functionality and
provides a complete description of the improved dbutil script
syntax.
With Eloquence B.07.00 the dbutil utility has been improved
substantially:
- Interactive mode
dbutil supports an interactive mode for database security
management. When run without passing a script file dbutil will
launch a dialog based user interface.
- Enhanced capabilities
The dbutil capabilities have been enhanced. The script syntax is
backwards compatible with the previous Eloquence A.06.3x version.
- Database structural maintenance
dbutil supports database structural maintenance. The dbutil
script language allows to modify the database schema.
The database server will restructure the database as necessary.
This functionality has been introduced with PR#8 and cannot
be used with older eloqdb6 versions.
usage: dbutil [options] [file|-]
options:
-help - show usage (this list)
-u name - user name (default "dba")
-p pswd - password
-h host - host name or ip address (and service)
-s service - service name or port number
-n - pretend (batch mode only)
-v - verbose (batch mode only)
-T - HP3000 TurboImage compatibility mode
If a file is specified, dbutil will process in batch mode
and process any statements in the batch file.
If the file argument is not specified dbutil runs in
interactive mode.
If the -n option is present, no changes will be made to the
database. Processing will end after checking the input file
and the analyse phase.
The -n and -v options are only available when used
in batch mode. The -n option causes dbutil to execute in test
mode. All changes are rolled-back and not applied to the database.
The -v option displays additional information during script
processing. If specified twice, every command in the script will be
echoed back to the user.
The -T option causes dbutil to interpret all item types and
sizes in TurboIMAGE format. By default, item types and sizes follow
the Eloquence conventions (ie. item sizes are in byte units).
The -h option can be specified with a [host][:service] syntax
where host defaults to the local system and service defaults to the
"eloqdb" service name. Alternatively, the EQ_DBSERVER environment
variable may be used.
User and password, specified with the -u and -p options,
can be a reference to a file if prepended by "file:". They may also be
defined by the EQ_DBUSER and EQ_DBPASSWORD environment variables.
Eloquence B.07.00 adds structural maintenance for
Eloquence databases. The new dbutil utility can be used to
specify structural changes by uploading a new schema for the
database to the server. The database server then makes
structural changes as required.
Eloquence database structural maintenance is very flexible.
Here are the current restrictions as of Eloquence B.07.00:
- The type of a data set cannot be changed (e.g. from detail
to master).
- The search item of a manual master set cannot be
modified in a way which might lead to duplicates.
For example, shortening a search item in a manual
master from X20 to X10 is not allowed.
- The order of data sets cannot be changed. New data sets are
appended to the existing list of data sets. The exceptions are
master sets which are inserted before the first related detail set.
- The order of items cannot be changed. New items are appended
to the existing list of items.
- The order of index items cannot be changed. New index items
are appended to the existing list of index items.
- If data is converted to a different data type the
conversion algorithm can currently not be specified.
The following conversion rules apply:
- Any truncation or precision loss is indicated with a single warning
message per item in a data set. This warning is written into the database
server log which by default is the syslog on HP-UX and Linux or the
event log on Windows. The database server log flags must contain
I1 at least to make these warning messages appear in the log.
- Conversion of negative values into an unsigned data type (K) currently
results in the absolute value, ie. the negative sign is lost.
- Conversion of floating point values into integral data types currently
truncate any post-decimal digits.
The DBUTIL program runs in interactive mode when no script file is
specified on the command line. The interactive user interface
provides a subset of the scripting capabilities which are
typically used to maintain a database. Currently this is mostly
limited to managing database security.
Pressing the F1 key (or selecting the Help function) provides
on-line help.
Please refer to the
dbutil interactive usage
description for more information.
The DBUTIL program will run in batch mode when a script file is specified
on the command line. The statements in the script file allow a variety
of database operations, ranging from database security management to
database structural maintenance. Please refer to the
dbutil syntax description
for more information.
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