This fix changes the character set used within the
IBMDB2I handler to hash table names to information
about open tables. Previously, tables with names
that differed only in letter case would hash to the
same data structure. This caused incorrect behavior
or errors when two such tables were in use simultaneously.
Recently, the "#define" directives mapping the old names to the new ones
have been removed, so now all callers must use the new names.
This change was missing in the DB2 storage handler modules.
With ibmdb2i_create_index_option set to 1, creating an IBMDB2I table
with a primary key should produce an additional index that uses EBCDIC
hexadecimal sorting. However, this does not work. Adding indexes that
are not primary keys does work. The ibmdb2i_create_index_option should
be honoured when creating a table with a primary key.
This patch adds code to the create() function to check for the value
of the ibmdb2i_create_index_option variable and, when appropriate, to
generate a *HEX-based shadow index in DB2 for the primary key. Previously
this behavior was limited to secondary indexes.
Additionally, this patch restricts the creation of shadow indexes to
cases in which a non-*HEX sort sequence is used, as the documentation
for ibmdb2i_create_index_option describes. Previously, the shadow index
would in some cases be created even when the MySQL-specific index used
*HEX sorting, leading to redundant indexes.
Finally, the code used to generate the list of fields for indexes
and the code used to generate the SQL statement for the shadow
indexes has been refactored into individual functions.
In order to better support the usage of
IBMDB2I tables from within RPG programs,
the storage engine should ensure that the
RCDFMT name is consistent and predictable
for DB2 tables.
This patch appends a "RCDFMT <name>"
clause to the CREATE TABLE statement
that is passed to DB2. <name> is
generated from the original name of
the table itself. This ensures a
consistent and deterministic mapping
from the original table.
For the sake of simplicity only
the alpha-numeric characters are
preserved when generating the new
name, and these are upper-cased;
other characters are replaced with
an underscore (_). Following DB2
system identifier rules, the name
always begins with an alpha-character
and has a maximum of ten characters.
If no usable characters are found in
the table name, the name X is used.
The storage engine was not correctly handling the case in
which rnd_pos is executed for a handler without a preceding
rnd_next or index read operation. As a result, an unitialized
file handle was sometimes being passed to the QMY_READ API.
The fix clears the rrnAssocHandle at the beginning of each
read operation and then checks to see whether it has been
set to a valid handle value before attempting to use it
in rnd_pos. If rrnAssocHandle has not been set by a previous
read operation, rnd_pos instead falls back to the use of the
currently active handle.
On IBM i 5.4, schemas with names that are longer
than 8 characters and contain digits or an underscore
cannot contain IBMDB2I tables, even though this should
theoritically be possible if all alpha characters
are uppercase.
THe current patch fixes the IBMDB2I engine to
allow digits and the underscore(_) to be used in
schema names longer than 8 characters on IBM i 5.4.
In some circumstances, when a table is created with
the IBMDB2I engine, the CREATE TABLE statement will
return successfully but the table will not exist.
The current patch addresses the above issue and causes
CREATE to fail and report and error to the user.
Modify plugins.m4 configuration framework so that plugins which are
not built still get added to the source distribution during make dist.
This came up now because we can only build ibmdb2i on i5/OS, and we
can't bootstrap our source dist on that platform. The solution is to
specify DIST_SUBDIRS containing all plugins, separate from SUBDIRS
which contains the plugins which are actually built.
This ibmdb2i code is from the ibmdb2i-ga3-src.zip file, with a patch
to plug.in to disable the plugin if the PASE environment isn't available.
