Generate Resync script

Compare Objects has the ability to generate a script to resync the two objects / schemas.

Options controlling this are given on the Resync tab, as shown below.

These options are described below:

• Generate Resync Script? This specified whether you are wishing to create a resync script, and if so which schema is to be resynced to the other.
• File. This gives the name of the resync script file.
• Create objects if not present. This option is only relevant if you are comparing schemas, rather than a single object. It specifies whether you want the resync script to include Create statements - this will be done if the object is not present in the schema being resynced, but is in the other schema.
• Drop objects if not present in other schema. This option is only relevant if you are comparing schemas, rather than a single object. It specifies whether you want the resync script to include Drop statements - this will be done if the object is present in the schema being resynced, but is not presnt in the other schema.

Controlling what objects and attributes are resynced

AQT will attempt to resync all differences found during the compare process.Therefore, you select which objects and attributes you wish to have resynced by the What to Compare box on the Options tab.

For example, to prevent AQT attempting to resync the Null attributes on columns, click on Columns in the What to Compare box, then de-select Nulls on the Attribute for Columns box.

AQT cannot resync all attributes

Not all differences found by the compare can be resynced. There are a number of attributes that are set when the object is created and can't subsequently be changed.

When this happens, you will get messages such as the following in the resync file:

--Note: AQT is unable to generate the SQL for the following change

--Change Table COMP2.DEPARTMENT value of Tablespace from "TESTST2" to "USERSPACE1"

In the case of comparing tables, more complex changes to tables can often only be achieved by dropping and recreating the tables. AQT will not do this, but instead will attempt to modify the table by means of ALTER statements. If this cannot be done the difference will remain as an unsynced difference.

When the compare completes, the result of the compare is given in the status-bar at the bottom of the windows. The number of differences which can't be resynced are given in the Failed count.

Multiple Resync Scipts

You can have <schema> or <table> in your resync file name. When the compare is run, the schema and object-name of the object being compared are substituted for these. When comparing multiple objects, this allows you to have a different resync file for each object.

Note that when you are comparing between different schemas, the schema being resynced (eg. the schema to which changes will be applied) is the one substituted in <schema>. This may be different from the schema that is substituted for <schema> in the report file name.

Allow drop / redefine of indexes and other objects

See the next topic.

When recreating indexes, retain existing name

See the next topic.