类的使用
org.apache.flink.cdc.runtime.operators.transform.ProjectionColumn

使用ProjectionColumn的程序包

程序包	说明
org.apache.flink.cdc.runtime.operators.transform
org.apache.flink.cdc.runtime.parser

org.apache.flink.cdc.runtime.operators.transform中ProjectionColumn的使用

返回ProjectionColumn的org.apache.flink.cdc.runtime.operators.transform中的方法

限定符和类型	方法和说明
ProjectionColumn	ProjectionColumn.copy()
ProjectionColumn	ProjectionColumnProcessor.getProjectionColumn()
static ProjectionColumn	ProjectionColumn.ofAliased(org.apache.flink.cdc.common.schema.Column column, String newName) This projection is created with a simple $id$ AS $new_id$ expression.
static ProjectionColumn	ProjectionColumn.ofCalculated(String columnName, org.apache.flink.cdc.common.types.DataType dataType, String expression, String scriptExpression, List<String> originalColumnNames) This projection is created with a complex calculation expression.
static ProjectionColumn	ProjectionColumn.ofForwarded(org.apache.flink.cdc.common.schema.Column column) This projection is created with a plain column name.

返回变量类型为ProjectionColumn的类型的org.apache.flink.cdc.runtime.operators.transform中的方法

限定符和类型	方法和说明
List<ProjectionColumn>	TransformProjection.getProjectionColumns()

参数类型为ProjectionColumn的org.apache.flink.cdc.runtime.operators.transform中的方法

限定符和类型	方法和说明
static ProjectionColumnProcessor	ProjectionColumnProcessor.of(PostTransformChangeInfo tableInfo, ProjectionColumn projectionColumn, String timezone, List<UserDefinedFunctionDescriptor> udfDescriptors, List<Object> udfFunctionInstances, org.apache.flink.cdc.common.source.SupportedMetadataColumn[] supportedMetadataColumns)

类型变量类型为ProjectionColumn的org.apache.flink.cdc.runtime.operators.transform中的方法参数

限定符和类型	方法和说明
void	TransformProjection.setProjectionColumns(List<ProjectionColumn> projectionColumns)

参数类型为ProjectionColumn的org.apache.flink.cdc.runtime.operators.transform中的构造器

构造器和说明
ProjectionColumnProcessor(PostTransformChangeInfo tableInfo, ProjectionColumn projectionColumn, String timezone, List<UserDefinedFunctionDescriptor> udfDescriptors, List<Object> udfFunctionInstances, org.apache.flink.cdc.common.source.SupportedMetadataColumn[] supportedMetadataColumns)

类型变量类型为ProjectionColumn的org.apache.flink.cdc.runtime.operators.transform中的构造器参数

构造器和说明
TransformProjection(String projection, List<ProjectionColumn> projectionColumns)

org.apache.flink.cdc.runtime.parser中ProjectionColumn的使用

返回ProjectionColumn的org.apache.flink.cdc.runtime.parser中的方法

限定符和类型

方法和说明

static ProjectionColumn

TransformParser.resolveProjectionColumnFromIdentifier(Map<String,org.apache.calcite.rel.type.RelDataType> relDataTypeMap, Map<String,org.apache.flink.cdc.common.schema.Column> originalColumnMap, String identifier, String projectedColumnName, org.apache.flink.cdc.common.source.SupportedMetadataColumn[] supportedMetadataColumns) Create a projection column from a simple identifier node (could be an upstream physical column or a metadata column).

返回变量类型为ProjectionColumn的类型的org.apache.flink.cdc.runtime.parser中的方法

限定符和类型	方法和说明
static List<ProjectionColumn>	TransformParser.generateProjectionColumns(String projectionExpression, List<org.apache.flink.cdc.common.schema.Column> columns, List<UserDefinedFunctionDescriptor> udfDescriptors, org.apache.flink.cdc.common.source.SupportedMetadataColumn[] supportedMetadataColumns)