SchemaChangeEventWithPreSchema (flink-cdc-parent 3.8-SNAPSHOT API)

All Superinterfaces:

ChangeEvent, Event, SchemaChangeEvent, Serializable

All Known Implementing Classes:

AlterColumnTypeEvent
```
@PublicEvolving
public interface SchemaChangeEventWithPreSchema
extends SchemaChangeEvent
```
A SchemaChangeEvent that supports appending schema before change event.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`void`	`fillPreSchema(Schema oldSchema)`	Append schema before change info to this event.
`boolean`	`hasPreSchema()`	Describes if this event already has schema before change info.
`default boolean`	`trimRedundantChanges()`	Check if this event contains redundant schema change request only.

Methods inherited from interface org.apache.flink.cdc.common.event.ChangeEvent
tableId

Methods inherited from interface org.apache.flink.cdc.common.event.SchemaChangeEvent
copy, getType

- Method Detail
  - hasPreSchema
```
boolean hasPreSchema()
```
    Describes if this event already has schema before change info.
  - fillPreSchema
```
void fillPreSchema(Schema oldSchema)
```
    Append schema before change info to this event.
  - trimRedundantChanges
```
default boolean trimRedundantChanges()
```
    Check if this event contains redundant schema change request only.