anchor.diff:  Without these grants, the connector cannot operate.
   
   |===
  +
  +// Type: concept
  +// Title: Support for Oracle standby databases
  +[id="support-for-oracle-standby-databases"]
   === Standby databases
   ifdef::product[]
   The {prodname} Oracle connector cannot be used with Oracle physical or logical standby databases.
  
positive.code: 
  [[oracle-default-values]]
  === Default Values
  If a default value is specified for a column in the database schema, the Oracle connector will attempt to propagate this value to the schema of the corresponding Kafka record field. Most common data types are supported, including:
  
  * Character types (`CHAR`, `NCHAR`, `VARCHAR`, `VARCHAR2`, `NVARCHAR`, `NVARCHAR2`)
  * Numeric types (`INTEGER`, `NUMERIC`, etc.)
  * Temporal types (`DATE`, `TIMESTAMP`, `INTERVAL`, etc.)
  
  If a temporal type uses a function call such as `TO_TIMESTAMP` or `TO_DATE` to represent the default value, the connector will resolve the default value by making an additional database call to evaluate the function.
  For example, if a `DATE` column is defined with the default value of `TO_DATE('2021-01-02', 'YYYY-MM-DD')`, the column's default value will be the number of days since epoch for that date or `18629` in this case.
  
  If a temporal type uses the `SYSDATE` constant to represent the default value, the connector will resolve this based on whether the column is defined as `NOT NULL` or `NULL`.
  If the column is nullable, no default value will be set; however, if the column isn't nullable then the default value will be resolved as either `0` (for `DATE` or `TIMESTAMP(n)` data types) or `1970-01-01T00:00:00Z` (for `TIMESTAMP WITH TIME ZONE` or `TIMESTAMP WITH LOCAL TIME ZONE` data types).
  
negative.code: |`schema_only_recovery`
  |Set this option to restore a database history topic that is lost or corrupted.
  After a restart, the connector runs a snapshot that rebuilds the topic from the source tables.
  You can also set the property to periodically prune a database history topic that experiences unexpected growth. +
   +
  WARNING: Do not use this mode to perform a snapshot if schema changes were committed to the database after the last connector shutdown.
  |===
  
  For more information, see xref:oracle-property-snapshot-mode[`snapshot.mode`] in the table of connector configuration properties.
  
  // Type: concept
  // ModuleID: debezium-oracle-ad-hoc-snapshots
  