V$FLASHBACK_TXN

7.227 V$FLASHBACK_TXN_GRAPH

V$FLASHBACK_TXN_GRAPH displays a tabular representation of the transaction dependency graph. For each dependency edge, there could be multiple rows, one for each conflicting operation.

This view is relevant AFTER a compensating transaction has been started through the DBMS_FLASHBACK.TRANSACTION_BACKOUT() set of functions, and is no longer relevant once the compensating transaction is either committed or rolled back. It also provides a tabular representation of the undo SQL that is not available through the CLOB XML construct in the DBA_FLASHBACK_TXN_REPORT view.

Column	Datatype	Description
`COMPENSATING_XID`	`RAW(8)`	Transaction ID of the compensating transaction
`COMPENSATING_TXN_NAME`	`VARCHAR2(255)`	Name of the compensating transaction
`XID`	`RAW(8)`	Transaction ID of a relevant transaction found in memory
`TXN_NAME`	`VARCHAR2(255)`	Name of the transaction with `XID` as the transaction ID; NULL if none
`PARENT_XID`	`RAW(8)`	Parent transaction ID (for a PDML transaction)
`INTERESTING`	`NUMBER`	If the transaction is in the transaction dependency graph
`ORIGINAL`	`NUMBER`	If the transaction is part of the input set provided
`BACKOUT_SEQ`	`NUMBER`	Order in which the transaction has been backed out
`NUM_PREDS`	`NUMBER`	Number of predecessors of the transaction specified by `XID` in the transaction graph
`NUM_SUCCS`	`NUMBER`	Number of successors of the transaction specified by `XID` in the transaction graph
`DEP_XID`	`RAW(8)`	One dependent transaction ID of the transaction specified by `XID`. This is a particular child of `XID`.
`DEP_TXN_NAME`	`VARCHAR2(255)`	Transaction name, if any, for the transaction specified by `DEP_XID`
`TXN_CONF_SQL_ID`	`NUMBER`	SQL ID of undo SQL executed in the context of `XID` which conflicts with the dependent transaction
`DEP_TXN_CONF_SQL_ID`	`NUMBER`	SQL ID of undo SQL executed in the context of `DEP_XID` which conflicts with `XID`
`CONFLICT_TYPE`	`VARCHAR2(32)`	The type of conflict that the conflict resolution method is used to resolve: delete, uniqueness, or update
`CON_ID`	`NUMBER`	The ID of the container to which the data pertains. Possible values include: `0`: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs. `1`: This value is used for rows containing data that pertain to only the root n: Where n is the applicable container ID for the rows containing data