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[FLINK-36956][transform] Append NOT NULL attribute to PK columns #3815

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Merged
leonardBang merged 1 commit into from
Jan 9, 2025
Merged

[FLINK-36956][transform] Append NOT NULL attribute to PK columns #3815

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2 changes: 2 additions & 0 deletions docs/content.zh/docs/core-concept/transform.md
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Original file line number Diff line number Diff line change
Expand Up @@ -263,6 +263,8 @@ transform:
description: reassign composite primary keys example
```

Notice that primary key columns will be attributed as NOT NULL in the downstream table, so you should ensure that no NULL value will be assigned to these columns.

## Reassign partition key
We can reassign the partition key in transform rules. For example, given a table web_order in the database mydb, we may define a transform rule as follows:

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2 changes: 2 additions & 0 deletions docs/content/docs/core-concept/transform.md
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Original file line number Diff line number Diff line change
Expand Up @@ -263,6 +263,8 @@ transform:
description: reassign composite primary keys example
```

Notice that primary key columns will be attributed as NOT NULL in the downstream table, so you should ensure that no NULL value will be assigned to these columns.

## Reassign partition key
We can reassign the partition key in transform rules. For example, given a table web_order in the database mydb, we may define a transform rule as follows:

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12 changes: 6 additions & 6 deletions ...mposer/src/test/java/org/apache/flink/cdc/composer/flink/FlinkPipelineComposerITCase.java
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Original file line number Diff line number Diff line change
Expand Up @@ -350,7 +350,7 @@ void testTransform(ValuesDataSink.SinkApi sinkApi) throws Exception {
String[] outputEvents = outCaptor.toString().trim().split("\n");
assertThat(outputEvents)
.containsExactly(
"CreateTableEvent{tableId=default_namespace.default_schema.table1, schema=columns={`col1` STRING,`col2` STRING,`col12` STRING}, primaryKeys=col1, partitionKeys=col12, options=({key1=value1})}",
"CreateTableEvent{tableId=default_namespace.default_schema.table1, schema=columns={`col1` STRING NOT NULL,`col2` STRING,`col12` STRING}, primaryKeys=col1, partitionKeys=col12, options=({key1=value1})}",
"DataChangeEvent{tableId=default_namespace.default_schema.table1, before=[], after=[1, 1, 10], op=INSERT, meta=({op_ts=1})}",
"DataChangeEvent{tableId=default_namespace.default_schema.table1, before=[], after=[2, 2, 20], op=INSERT, meta=({op_ts=2})}",
"AddColumnEvent{tableId=default_namespace.default_schema.table1, addedColumns=[ColumnWithPosition{column=`col3` STRING, position=AFTER, existedColumnName=col2}]}",
Expand Down Expand Up @@ -413,7 +413,7 @@ void testOpTypeMetadataColumn(ValuesDataSink.SinkApi sinkApi) throws Exception {
String[] outputEvents = outCaptor.toString().trim().split("\n");
assertThat(outputEvents)
.containsExactly(
"CreateTableEvent{tableId=default_namespace.default_schema.table1, schema=columns={`col1` STRING,`col2` STRING,`col12` STRING,`rk` STRING NOT NULL,`opts` BIGINT NOT NULL}, primaryKeys=col1, partitionKeys=col12, options=({key1=value1})}",
"CreateTableEvent{tableId=default_namespace.default_schema.table1, schema=columns={`col1` STRING NOT NULL,`col2` STRING,`col12` STRING,`rk` STRING NOT NULL,`opts` BIGINT NOT NULL}, primaryKeys=col1, partitionKeys=col12, options=({key1=value1})}",
"DataChangeEvent{tableId=default_namespace.default_schema.table1, before=[], after=[1, 1, 10, +I, 1], op=INSERT, meta=({op_ts=1})}",
"DataChangeEvent{tableId=default_namespace.default_schema.table1, before=[], after=[2, 2, 20, +I, 2], op=INSERT, meta=({op_ts=2})}",
"AddColumnEvent{tableId=default_namespace.default_schema.table1, addedColumns=[ColumnWithPosition{column=`col3` STRING, position=AFTER, existedColumnName=col2}]}",
Expand Down Expand Up @@ -485,7 +485,7 @@ void testTransformTwice(ValuesDataSink.SinkApi sinkApi) throws Exception {
String[] outputEvents = outCaptor.toString().trim().split("\n");
assertThat(outputEvents)
.containsExactly(
"CreateTableEvent{tableId=default_namespace.default_schema.table1, schema=columns={`col1` STRING,`col2` STRING,`col12` STRING}, primaryKeys=col1, partitionKeys=col12, options=({key1=value1})}",
"CreateTableEvent{tableId=default_namespace.default_schema.table1, schema=columns={`col1` STRING NOT NULL,`col2` STRING,`col12` STRING}, primaryKeys=col1, partitionKeys=col12, options=({key1=value1})}",
"DataChangeEvent{tableId=default_namespace.default_schema.table1, before=[], after=[1, 1, 11], op=INSERT, meta=({op_ts=1})}",
"DataChangeEvent{tableId=default_namespace.default_schema.table1, before=[], after=[2, 2, 22], op=INSERT, meta=({op_ts=2})}",
"AddColumnEvent{tableId=default_namespace.default_schema.table1, addedColumns=[ColumnWithPosition{column=`col3` STRING, position=AFTER, existedColumnName=col2}]}",
Expand Down Expand Up @@ -1024,7 +1024,7 @@ void testTransformMergingWithRoute() throws Exception {
assertThat(mergedTableSchema)
.isEqualTo(
Schema.newBuilder()
.physicalColumn("id", DataTypes.BIGINT())
.physicalColumn("id", DataTypes.BIGINT().notNull())
.physicalColumn("name", DataTypes.STRING())
.physicalColumn("age", DataTypes.INT())
.physicalColumn("last_name", DataTypes.STRING())
Expand All @@ -1035,12 +1035,12 @@ void testTransformMergingWithRoute() throws Exception {
String[] outputEvents = outCaptor.toString().trim().split("\n");
assertThat(outputEvents)
.containsExactly(
"CreateTableEvent{tableId=default_namespace.default_schema.merged, schema=columns={`id` INT,`name` STRING,`age` INT,`last_name` STRING}, primaryKeys=id, options=()}",
"CreateTableEvent{tableId=default_namespace.default_schema.merged, schema=columns={`id` INT NOT NULL,`name` STRING,`age` INT,`last_name` STRING}, primaryKeys=id, options=()}",
"DataChangeEvent{tableId=default_namespace.default_schema.merged, before=[], after=[1, Alice, 18, last_name], op=INSERT, meta=()}",
"DataChangeEvent{tableId=default_namespace.default_schema.merged, before=[], after=[2, Bob, 20, last_name], op=INSERT, meta=()}",
"DataChangeEvent{tableId=default_namespace.default_schema.merged, before=[2, Bob, 20, last_name], after=[2, Bob, 30, last_name], op=UPDATE, meta=()}",
"AddColumnEvent{tableId=default_namespace.default_schema.merged, addedColumns=[ColumnWithPosition{column=`description` STRING, position=AFTER, existedColumnName=last_name}]}",
"AlterColumnTypeEvent{tableId=default_namespace.default_schema.merged, typeMapping={id=BIGINT}, oldTypeMapping={id=INT}}",
"AlterColumnTypeEvent{tableId=default_namespace.default_schema.merged, typeMapping={id=BIGINT NOT NULL}, oldTypeMapping={id=INT NOT NULL}}",
"DataChangeEvent{tableId=default_namespace.default_schema.merged, before=[], after=[3, Charlie, 15, last_name, student], op=INSERT, meta=()}",
"DataChangeEvent{tableId=default_namespace.default_schema.merged, before=[], after=[4, Donald, 25, last_name, student], op=INSERT, meta=()}",
"DataChangeEvent{tableId=default_namespace.default_schema.merged, before=[4, Donald, 25, last_name, student], after=[], op=DELETE, meta=()}",
Expand Down
12 changes: 6 additions & 6 deletions ...src/test/java/org/apache/flink/cdc/composer/flink/FlinkPipelineComposerLenientITCase.java
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Original file line number Diff line number Diff line change
Expand Up @@ -394,7 +394,7 @@ void testTransform(ValuesDataSink.SinkApi sinkApi) throws Exception {
String[] outputEvents = outCaptor.toString().trim().split(LINE_SEPARATOR);
assertThat(outputEvents)
.containsExactly(
"CreateTableEvent{tableId=default_namespace.default_schema.table1, schema=columns={`col1` STRING,`col2` STRING,`col12` STRING}, primaryKeys=col1, partitionKeys=col12, options=({key1=value1})}",
"CreateTableEvent{tableId=default_namespace.default_schema.table1, schema=columns={`col1` STRING NOT NULL,`col2` STRING,`col12` STRING}, primaryKeys=col1, partitionKeys=col12, options=({key1=value1})}",
"DataChangeEvent{tableId=default_namespace.default_schema.table1, before=[], after=[1, 1, 10], op=INSERT, meta=({op_ts=1})}",
"DataChangeEvent{tableId=default_namespace.default_schema.table1, before=[], after=[2, 2, 20], op=INSERT, meta=({op_ts=2})}",
"AddColumnEvent{tableId=default_namespace.default_schema.table1, addedColumns=[ColumnWithPosition{column=`col3` STRING, position=LAST, existedColumnName=null}]}",
Expand Down Expand Up @@ -455,7 +455,7 @@ void testOpTypeMetadataColumn(ValuesDataSink.SinkApi sinkApi) throws Exception {
String[] outputEvents = outCaptor.toString().trim().split(LINE_SEPARATOR);
assertThat(outputEvents)
.containsExactly(
"CreateTableEvent{tableId=default_namespace.default_schema.table1, schema=columns={`col1` STRING,`col2` STRING,`col12` STRING,`rk` STRING NOT NULL}, primaryKeys=col1, partitionKeys=col12, options=({key1=value1})}",
"CreateTableEvent{tableId=default_namespace.default_schema.table1, schema=columns={`col1` STRING NOT NULL,`col2` STRING,`col12` STRING,`rk` STRING NOT NULL}, primaryKeys=col1, partitionKeys=col12, options=({key1=value1})}",
"DataChangeEvent{tableId=default_namespace.default_schema.table1, before=[], after=[1, 1, 10, +I], op=INSERT, meta=({op_ts=1})}",
"DataChangeEvent{tableId=default_namespace.default_schema.table1, before=[], after=[2, 2, 20, +I], op=INSERT, meta=({op_ts=2})}",
"AddColumnEvent{tableId=default_namespace.default_schema.table1, addedColumns=[ColumnWithPosition{column=`col3` STRING, position=LAST, existedColumnName=null}]}",
Expand Down Expand Up @@ -525,7 +525,7 @@ void testTransformTwice(ValuesDataSink.SinkApi sinkApi) throws Exception {
String[] outputEvents = outCaptor.toString().trim().split(LINE_SEPARATOR);
assertThat(outputEvents)
.containsExactly(
"CreateTableEvent{tableId=default_namespace.default_schema.table1, schema=columns={`col1` STRING,`col2` STRING,`col12` STRING}, primaryKeys=col1, partitionKeys=col12, options=({key1=value1})}",
"CreateTableEvent{tableId=default_namespace.default_schema.table1, schema=columns={`col1` STRING NOT NULL,`col2` STRING,`col12` STRING}, primaryKeys=col1, partitionKeys=col12, options=({key1=value1})}",
"DataChangeEvent{tableId=default_namespace.default_schema.table1, before=[], after=[1, 1, 11], op=INSERT, meta=({op_ts=1})}",
"DataChangeEvent{tableId=default_namespace.default_schema.table1, before=[], after=[2, 2, 22], op=INSERT, meta=({op_ts=2})}",
"AddColumnEvent{tableId=default_namespace.default_schema.table1, addedColumns=[ColumnWithPosition{column=`col3` STRING, position=LAST, existedColumnName=null}]}",
Expand Down Expand Up @@ -1057,7 +1057,7 @@ void testTransformMergingWithRoute() throws Exception {
assertThat(mergedTableSchema)
.isEqualTo(
Schema.newBuilder()
.physicalColumn("id", DataTypes.BIGINT())
.physicalColumn("id", DataTypes.BIGINT().notNull())
.physicalColumn("name", DataTypes.STRING())
.physicalColumn("age", DataTypes.INT())
.physicalColumn("last_name", DataTypes.STRING())
Expand All @@ -1068,12 +1068,12 @@ void testTransformMergingWithRoute() throws Exception {
String[] outputEvents = outCaptor.toString().trim().split(LINE_SEPARATOR);
assertThat(outputEvents)
.containsExactly(
"CreateTableEvent{tableId=default_namespace.default_schema.merged, schema=columns={`id` INT,`name` STRING,`age` INT,`last_name` STRING}, primaryKeys=id, options=()}",
"CreateTableEvent{tableId=default_namespace.default_schema.merged, schema=columns={`id` INT NOT NULL,`name` STRING,`age` INT,`last_name` STRING}, primaryKeys=id, options=()}",
"DataChangeEvent{tableId=default_namespace.default_schema.merged, before=[], after=[1, Alice, 18, last_name], op=INSERT, meta=()}",
"DataChangeEvent{tableId=default_namespace.default_schema.merged, before=[], after=[2, Bob, 20, last_name], op=INSERT, meta=()}",
"DataChangeEvent{tableId=default_namespace.default_schema.merged, before=[2, Bob, 20, last_name], after=[2, Bob, 30, last_name], op=UPDATE, meta=()}",
"AddColumnEvent{tableId=default_namespace.default_schema.merged, addedColumns=[ColumnWithPosition{column=`description` STRING, position=LAST, existedColumnName=null}]}",
"AlterColumnTypeEvent{tableId=default_namespace.default_schema.merged, typeMapping={id=BIGINT}, oldTypeMapping={id=INT}}",
"AlterColumnTypeEvent{tableId=default_namespace.default_schema.merged, typeMapping={id=BIGINT NOT NULL}, oldTypeMapping={id=INT NOT NULL}}",
"DataChangeEvent{tableId=default_namespace.default_schema.merged, before=[], after=[3, Charlie, 15, last_name, student], op=INSERT, meta=()}",
"DataChangeEvent{tableId=default_namespace.default_schema.merged, before=[], after=[4, Donald, 25, last_name, student], op=INSERT, meta=()}",
"DataChangeEvent{tableId=default_namespace.default_schema.merged, before=[4, Donald, 25, last_name, student], after=[], op=DELETE, meta=()}",
Expand Down
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