Columns
| Column | Type | Size | Nulls | Auto | Default | Children | Parents | Comments | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
| id | uuid | 2147483647 | uuid_generate_v7() |
|
|
The record’s primary key. The definitive identifier of the record in the system. General Usage This column is system maintained and should be considered read only in normal operations. |
|||||
| instance_type_application_id | uuid | 2147483647 | null |
|
|
The Instance Type/Application association to which the context definition belongs. |
|||||
| application_context_id | uuid | 2147483647 | null |
|
|
The Application Context which is being represented in the Instance Type. |
|||||
| default_db_pool_size | int4 | 10 | 0 |
|
|
A default pool size which is assigned to new Instances of the Instance Type unless the creator of the Instance specifies a different value. |
|||||
| diag_timestamp_created | timestamptz | 35,6 | now() |
|
|
The database server date/time when the transaction which created the record started. General Usage This column is system maintained and should be considered read only in normal operations. |
|||||
| diag_role_created | text | 2147483647 | √ | null |
|
|
The database role which created the record. General Usage This column is system maintained and should be considered read only in normal operations. |
||||
| diag_timestamp_modified | timestamptz | 35,6 | now() |
|
|
The database server date/time when the transaction which modified the record started. This field will be the same as diag_timestamp_created for inserted records. General Usage This column is system maintained and should be considered read only in normal operations. |
|||||
| diag_wallclock_modified | timestamptz | 35,6 | clock_timestamp() |
|
|
The database server date/time at the moment the record was actually modified. For long running transactions this time may be significantly later than the value of diag_timestamp_modified. General Usage This column is system maintained and should be considered read only in normal operations. |
|||||
| diag_role_modified | text | 2147483647 | √ | null |
|
|
The database role which modified the record. General Usage This column is system maintained and should be considered read only in normal operations. |
||||
| diag_row_version | int8 | 19 | 1 |
|
|
The current version of the row. The value here indicates how many actual data changes have been made to the row. If an update of the row leaves all data fields the same, disregarding the updates to the diag_* columns, the row version is not updated, nor are any updates made to the other diag_* columns other than diag_update_count. General Usage This column is system maintained and should be considered read only in normal operations. Direct Usage This column is frequently used by by application logic to resolve the “dirty write” issues which can arise from concurrent data changes. As such any administrative override of automatic system maintenance of this value should consider the ramifications on application function. |
|||||
| diag_update_count | int8 | 19 | 0 |
|
|
Records the number of times the record has been updated regardless as to if the update actually changed any data. In this way needless or redundant record updates can be found. This row starts at 0 and therefore may be the same as the diag_row_version - 1. General Usage This column is system maintained and should be considered read only in normal operations. |
Indexes
| Constraint Name | Type | Sort | Column(s) |
|---|---|---|---|
| syst_instance_type_contexts_pk | Primary key | Asc | id |
| syst_instance_type_contexts_instance_types_applications_udx | Must be unique | Asc/Asc | instance_type_application_id + application_context_id |
Check Constraints
| Constraint Name | Constraint |
|---|---|
| syst_instance_type_contexts_default_db_pool_size_chk | ((default_db_pool_size >= 0)) |