Database Upgrades

For detailed information about installing and upgrading SAP Sybase IQ, see the Installation and Configuration Guide.

Upgrading a 15.x Multiplex Prevents the Coordinator from Starting [CR #733475]

If you follow the instructions in the Migration Guide > Upgrading SAP Sybase IQ Databases to upgrade your 15.x multiplex database, you may encounter known issue CR #733475. To avoid this issue, perform these steps before you upgrade a 15.x multiplex:

Shut down all multiplex servers.
Restart the 15.x coordinator using your 15.x installation with the -iqmpx_sn 1 server option. This step is required to clear out all multiplex related metadata that can interfere with an upgrade.
Shut down the 15.x server.
Follow the steps in Migration Guide > Database Upgrades.

Omitting these steps may cause server startup failure and an error like Sybase IQ Abort From: slib/s_iqstore.cxx:1594.

If for some reason, you omit the step mentioned above, you may be unable to start your coordinator after upgrade. During startup, if you see a stack trace with the following signature, you have hit CR #733475:

pc: 0x7f5455eee3ec s_iqstore::ReplayCheckpointLog(s_checkpoint_log*,  dbServerType, s_bm*,
    s_bm*)+0x6c pc: 0x7f545628e274  st_database::OpenDatabase(unsigned long long, int,
    unsigned long long*, unsigned  int*)+0x3134

The only way out of this situation is to use forced recovery using your SAP Sybase IQ 16.0 installation. The following is an example of how you can start the coordinator for forced recovery. Just replace my_db with the name of your database and 'disk1/work/database/my_db.db' with the path and name of your database. If the symptoms you encounter are different, please call SAP Sybase Technical Support:

Start the coordinator with the -iqfrec and -iqmpx_sn 1 server options:

start_iq -n my_server -x 'tcpip{port=9999}' -gd dba -gm 1 
-iqmpx_sn 1 -iqfrec my_db disk1/work/database/my_db.db

Connect to the coordinator and run:
```
sp_iqcheckdb 'dropleaks database';
checkpoint;
```
Completion returns Freelist Updated.
Stop the coordinator.
Restart the coordinator without the -iqfrec and -iqmpx_sn server options.
Synchronize secondary servers.

Drop Servers of Type asejdbc Before Migrating SAP Sybase IQ 12.7 Databases to SAP Sybase IQ 16.0 [CR #726782]

The asejdbc server class is deprecated. Servers of type asejdbc must be dropped prior to running iqunload. SAP Sybase IQ 12.7 databases with remote server definitions based on the asejdbc driver will not have these definitions migrated to by the iqunload tool and will not give an error at the beginning of an unload saying that you need to drop any asejdbc servers (if there are any present).

Cannot Enable Row-level Versioning in Upgraded Database [CR #732621]

If you upgrade a database from 15.x to 16.0, you cannot enable row-level versioning (using the ALTER TABLE statement), or perform LOAD, INSERT or UPDATE statements on any IQ base table containing a CHAR, VARCHAR or VARBINARY column of width greater than 255. If your upgraded database contains a table having a column with these criteria, run the sp_iqrebuildindex procedure. After you run this procedure, you can enable row-level versioning and perform DML statements on these large-column tables.