Schema (flink-cdc-common 3.3.0 API)

java.lang.Object
- org.apache.flink.cdc.common.schema.Schema

所有已实现的接口:

Serializable
```
@PublicEvolving
public class Schema
extends Object
implements Serializable
```
Schema of a table or data collection.

另请参阅:

序列化表格

嵌套类概要

嵌套类
限定符和类型类和说明

static class Schema.Builder
A builder for constructing an immutable but still unresolved Schema.

嵌套类
限定符和类型	类和说明
`static class`	`Schema.Builder` A builder for constructing an immutable but still unresolved `Schema`.

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法和说明
`String`	`comment()` Returns the comment of the table or data collection.
`Schema`	`copy(List<Column> columns)` Returns a copy of the schema with a replaced list of `Column`.
`String`	`describeOptions()`
`boolean`	`equals(Object o)`
`Optional<Column>`	`getColumn(String columnName)` Returns the `Column` instance for the given column name.
`int`	`getColumnCount()` Returns the number of columns of this schema.
`List<DataType>`	`getColumnDataTypes()` Returns all column data types.
`List<String>`	`getColumnNames()` Returns all column names.
`List<Column>`	`getColumns()` Returns all `Column`s of this schema.
`int`	`hashCode()`
`static Schema.Builder`	`newBuilder()` Builder for configuring and creating instances of `Schema`.
`Map<String,String>`	`options()` Returns the options of the table or data collection.
`List<String>`	`partitionKeys()` Returns the partition keys of the table or data collection.
`List<String>`	`primaryKeys()` Returns the primary keys of the table or data collection.
`DataType`	`toRowDataType()` Converts all columns of this schema into a (possibly nested) row data type.
`String`	`toString()`

从类继承的方法 java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- 方法详细资料
  - getColumnCount
```
public int getColumnCount()
```
    Returns the number of columns of this schema.
  - getColumns
```
public List<Column> getColumns()
```
    Returns all Columns of this schema.
  - getColumnNames
```
public List<String> getColumnNames()
```
    Returns all column names. It does not distinguish between different kinds of columns.
  - getColumnDataTypes
```
public List<DataType> getColumnDataTypes()
```
    Returns all column data types. It does not distinguish between different kinds of columns.
  - primaryKeys
```
public List<String> primaryKeys()
```
    Returns the primary keys of the table or data collection.
  - partitionKeys
```
public List<String> partitionKeys()
```
    Returns the partition keys of the table or data collection.
  - options
```
public Map<String,String> options()
```
    Returns the options of the table or data collection.
  - describeOptions
```
public String describeOptions()
```
  - comment
```
public String comment()
```
    Returns the comment of the table or data collection.
  - getColumn
```
public Optional<Column> getColumn(String columnName)
```
    Returns the Column instance for the given column name.
    
    参数:
    
    columnName - the name of the column
  - toRowDataType
```
public DataType toRowDataType()
```
    Converts all columns of this schema into a (possibly nested) row data type.
    
    另请参阅:
    
    DataTypes.ROW(DataField...)
  - copy
```
public Schema copy(List<Column> columns)
```
    Returns a copy of the schema with a replaced list of Column.
  - equals
```
public boolean equals(Object o)
```
    覆盖:
    
    equals 在类中 Object
  - hashCode
```
public int hashCode()
```
    覆盖:
    
    hashCode 在类中 Object
  - newBuilder
```
public static Schema.Builder newBuilder()
```
    Builder for configuring and creating instances of Schema.
  - toString
```
public String toString()
```
    覆盖:
    
    toString 在类中 Object

类 Schema

嵌套类概要

方法概要

从类继承的方法 java.lang.Object

方法详细资料

getColumnCount

getColumns

getColumnNames

getColumnDataTypes

primaryKeys

partitionKeys

options

describeOptions

comment

getColumn

toRowDataType

copy

equals

hashCode

newBuilder

toString