TableSchema (Flink : Table : Common 1.14.6 API)

java.lang.Object
- org.apache.flink.table.api.TableSchema

已过时。
This class has been deprecated as part of FLIP-164. It has been replaced by two more dedicated classes Schema and ResolvedSchema. Use Schema for declaration in APIs. ResolvedSchema is offered by the framework after resolution and validation.
```
@Deprecated
 @PublicEvolving
public class TableSchema
extends Object
```
A table schema that represents a table's structure with field names and data types.

嵌套类概要

嵌套类
限定符和类型类和说明

static class TableSchema.Builder
已过时。

Builder for creating a TableSchema.

嵌套类
限定符和类型	类和说明
`static class`	`TableSchema.Builder` 已过时。 Builder for creating a `TableSchema`.

构造器概要

构造器
构造器和说明
`TableSchema(String[] fieldNames, org.apache.flink.api.common.typeinfo.TypeInformation<?>[] fieldTypes)` 已过时。 Use the `TableSchema.Builder` instead.

方法概要

所有方法静态方法实例方法具体方法已过时的方法
限定符和类型	方法和说明
`static TableSchema.Builder`	`builder()` 已过时。
`TableSchema`	`copy()` 已过时。 Returns a deep copy of the table schema.
`boolean`	`equals(Object o)` 已过时。
`static TableSchema`	`fromResolvedSchema(ResolvedSchema resolvedSchema)` 已过时。 Helps to migrate to the new `ResolvedSchema` to old API methods.
`static TableSchema`	`fromTypeInfo(org.apache.flink.api.common.typeinfo.TypeInformation<?> typeInfo)` 已过时。 This method will be removed soon. Use `DataTypes` to declare types.
`int`	`getFieldCount()` 已过时。 Returns the number of fields.
`Optional<DataType>`	`getFieldDataType(int fieldIndex)` 已过时。 Returns the specified data type for the given field index.
`Optional<DataType>`	`getFieldDataType(String fieldName)` 已过时。 Returns the specified data type for the given field name.
`DataType[]`	`getFieldDataTypes()` 已过时。 Returns all field data types as an array.
`Optional<String>`	`getFieldName(int fieldIndex)` 已过时。 Returns the specified name for the given field index.
`String[]`	`getFieldNames()` 已过时。 Returns all field names as an array.
`Optional<org.apache.flink.api.common.typeinfo.TypeInformation<?>>`	`getFieldType(int fieldIndex)` 已过时。 This method will be removed in future versions as it uses the old type system. It is recommended to use `getFieldDataType(int)` instead which uses the new type system based on `DataTypes`. Please make sure to use either the old or the new type system consistently to avoid unintended behavior. See the website documentation for more information.
`Optional<org.apache.flink.api.common.typeinfo.TypeInformation<?>>`	`getFieldType(String fieldName)` 已过时。 This method will be removed in future versions as it uses the old type system. It is recommended to use `getFieldDataType(String)` instead which uses the new type system based on `DataTypes`. Please make sure to use either the old or the new type system consistently to avoid unintended behavior. See the website documentation for more information.
`org.apache.flink.api.common.typeinfo.TypeInformation<?>[]`	`getFieldTypes()` 已过时。 This method will be removed in future versions as it uses the old type system. It is recommended to use `getFieldDataTypes()` instead which uses the new type system based on `DataTypes`. Please make sure to use either the old or the new type system consistently to avoid unintended behavior. See the website documentation for more information.
`Optional<UniqueConstraint>`	`getPrimaryKey()` 已过时。
`Optional<TableColumn>`	`getTableColumn(int fieldIndex)` 已过时。 Returns the `TableColumn` instance for the given field index.
`Optional<TableColumn>`	`getTableColumn(String fieldName)` 已过时。 Returns the `TableColumn` instance for the given field name.
`List<TableColumn>`	`getTableColumns()` 已过时。 Returns all the `TableColumn`s for this table schema.
`List<WatermarkSpec>`	`getWatermarkSpecs()` 已过时。 Returns a list of the watermark specification which contains rowtime attribute and watermark strategy expression.
`int`	`hashCode()` 已过时。
`DataType`	`toPersistedRowDataType()` 已过时。 Converts all persisted columns of this schema into a (possibly nested) row data type.
`DataType`	`toPhysicalRowDataType()` 已过时。 Converts all physical columns of this schema into a (possibly nested) row data type.
`DataType`	`toRowDataType()` 已过时。 Converts all columns of this schema into a (possibly nested) row data type.
`org.apache.flink.api.common.typeinfo.TypeInformation<org.apache.flink.types.Row>`	`toRowType()` 已过时。 Use `toRowDataType()` instead.
`Schema`	`toSchema()` 已过时。 Helps to migrate to the new `Schema` class.
`String`	`toString()` 已过时。

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

- 构造器详细资料
  - TableSchema
```
@Deprecated
public TableSchema(String[] fieldNames,
                               org.apache.flink.api.common.typeinfo.TypeInformation<?>[] fieldTypes)
```
    已过时。 Use the TableSchema.Builder instead.
- 方法详细资料
  - copy
```
public TableSchema copy()
```
    已过时。
    
    Returns a deep copy of the table schema.
  - getFieldDataTypes
```
public DataType[] getFieldDataTypes()
```
    已过时。
    
    Returns all field data types as an array.
  - getFieldTypes
```
@Deprecated
public org.apache.flink.api.common.typeinfo.TypeInformation<?>[] getFieldTypes()
```
    已过时。 This method will be removed in future versions as it uses the old type system. It is recommended to use getFieldDataTypes() instead which uses the new type system based on DataTypes. Please make sure to use either the old or the new type system consistently to avoid unintended behavior. See the website documentation for more information.
  - getFieldDataType
```
public Optional<DataType> getFieldDataType(int fieldIndex)
```
    已过时。
    
    Returns the specified data type for the given field index.
    
    参数:
    
    fieldIndex - the index of the field
  - getFieldType
```
@Deprecated
public Optional<org.apache.flink.api.common.typeinfo.TypeInformation<?>> getFieldType(int fieldIndex)
```
    已过时。 This method will be removed in future versions as it uses the old type system. It is recommended to use getFieldDataType(int) instead which uses the new type system based on DataTypes. Please make sure to use either the old or the new type system consistently to avoid unintended behavior. See the website documentation for more information.
  - getFieldDataType
```
public Optional<DataType> getFieldDataType(String fieldName)
```
    已过时。
    
    Returns the specified data type for the given field name.
    
    参数:
    
    fieldName - the name of the field
  - getFieldType
```
@Deprecated
public Optional<org.apache.flink.api.common.typeinfo.TypeInformation<?>> getFieldType(String fieldName)
```
    已过时。 This method will be removed in future versions as it uses the old type system. It is recommended to use getFieldDataType(String) instead which uses the new type system based on DataTypes. Please make sure to use either the old or the new type system consistently to avoid unintended behavior. See the website documentation for more information.
  - getFieldCount
```
public int getFieldCount()
```
    已过时。
    
    Returns the number of fields.
  - getFieldNames
```
public String[] getFieldNames()
```
    已过时。
    
    Returns all field names as an array.
  - getFieldName
```
public Optional<String> getFieldName(int fieldIndex)
```
    已过时。
    
    Returns the specified name for the given field index.
    
    参数:
    
    fieldIndex - the index of the field
  - getTableColumn
```
public Optional<TableColumn> getTableColumn(int fieldIndex)
```
    已过时。
    
    Returns the TableColumn instance for the given field index.
    
    参数:
    
    fieldIndex - the index of the field
  - getTableColumn
```
public Optional<TableColumn> getTableColumn(String fieldName)
```
    已过时。
    
    Returns the TableColumn instance for the given field name.
    
    参数:
    
    fieldName - the name of the field
  - getTableColumns
```
public List<TableColumn> getTableColumns()
```
    已过时。
    
    Returns all the TableColumns for this table schema.
  - toRowDataType
```
public DataType toRowDataType()
```
    已过时。
    
    Converts all columns of this schema into a (possibly nested) row data type.
    This method returns the source-to-query schema.
    Note: The returned row data type contains physical, computed, and metadata columns. Be careful when using this method in a table source or table sink. In many cases, toPhysicalRowDataType() might be more appropriate.
    
    另请参阅:
    
    DataTypes.ROW(Field...), toPhysicalRowDataType(), toPersistedRowDataType()
  - toPhysicalRowDataType
```
public DataType toPhysicalRowDataType()
```
    已过时。
    
    Converts all physical columns of this schema into a (possibly nested) row data type.
    Note: The returned row data type contains only physical columns. It does not include computed or metadata columns.
    
    另请参阅:
    
    DataTypes.ROW(Field...), toRowDataType(), toPersistedRowDataType()
  - toPersistedRowDataType
```
public DataType toPersistedRowDataType()
```
    已过时。
    
    Converts all persisted columns of this schema into a (possibly nested) row data type.
    This method returns the query-to-sink schema.
    Note: Computed columns and virtual columns are excluded in the returned row data type. The data type contains the columns of toPhysicalRowDataType() plus persisted metadata columns.
    
    另请参阅:
    
    DataTypes.ROW(Field...), toRowDataType(), toPhysicalRowDataType()
  - toRowType
```
@Deprecated
public org.apache.flink.api.common.typeinfo.TypeInformation<org.apache.flink.types.Row> toRowType()
```
    已过时。 Use toRowDataType() instead.
  - getWatermarkSpecs
```
public List<WatermarkSpec> getWatermarkSpecs()
```
    已过时。
    
    Returns a list of the watermark specification which contains rowtime attribute and watermark strategy expression.
    NOTE: Currently, there is at most one WatermarkSpec in the list, because we don't support multiple watermarks definition yet. But in the future, we may support multiple watermarks.
  - getPrimaryKey
```
public Optional<UniqueConstraint> getPrimaryKey()
```
    已过时。
  - toSchema
```
public Schema toSchema()
```
    已过时。
    
    Helps to migrate to the new Schema class.
  - toString
```
public String toString()
```
    已过时。
    
    覆盖:
    
    toString 在类中 Object
  - equals
```
public boolean equals(Object o)
```
    已过时。
    
    覆盖:
    
    equals 在类中 Object
  - hashCode
```
public int hashCode()
```
    已过时。
    
    覆盖:
    
    hashCode 在类中 Object
  - fromTypeInfo
```
@Deprecated
public static TableSchema fromTypeInfo(org.apache.flink.api.common.typeinfo.TypeInformation<?> typeInfo)
```
    已过时。 This method will be removed soon. Use DataTypes to declare types.
    
    Creates a table schema from a TypeInformation instance. If the type information is a CompositeType, the field names and types for the composite type are used to construct the TableSchema instance. Otherwise, a table schema with a single field is created. The field name is "f0" and the field type the provided type.
    
    参数:
    
    typeInfo - The TypeInformation from which the table schema is generated.
    
    返回:
    
    The table schema that was generated from the given TypeInformation.
  - fromResolvedSchema
```
public static TableSchema fromResolvedSchema(ResolvedSchema resolvedSchema)
```
    已过时。
    
    Helps to migrate to the new ResolvedSchema to old API methods.
  - builder
```
public static TableSchema.Builder builder()
```
    已过时。

类 TableSchema

嵌套类概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

TableSchema

方法详细资料

copy

getFieldDataTypes

getFieldTypes

getFieldDataType

getFieldType

getFieldDataType

getFieldType

getFieldCount

getFieldNames

getFieldName

getTableColumn

getTableColumn

getTableColumns

toRowDataType

toPhysicalRowDataType

toPersistedRowDataType

toRowType

getWatermarkSpecs

getPrimaryKey

toSchema

toString

equals

hashCode

fromTypeInfo

fromResolvedSchema

builder