SqlNodeConverter (Flink : 2.0-SNAPSHOT API)

All Known Implementing Classes:

AbstractSqlShowConverter, SqlAlterCatalogCommentConverter, SqlAlterCatalogOptionsConverter, SqlAlterCatalogResetConverter, SqlAlterMaterializedTableRefreshConverter, SqlAlterMaterializedTableResumeConverter, SqlAlterMaterializedTableSuspendConverter, SqlAlterTableAddPartitionConverter, SqlAlterTableDropPartitionConverter, SqlAlterViewAsConverter, SqlAlterViewPropertiesConverter, SqlAlterViewRenameConverter, SqlCreateCatalogConverter, SqlCreateMaterializedTableConverter, SqlCreateViewConverter, SqlDescribeCatalogConverter, SqlDescribeFunctionConverter, SqlDescribeJobConverter, SqlDropMaterializedTableConverter, SqlProcedureCallConverter, SqlQueryConverter, SqlReplaceTableAsConverter, SqlShowCatalogsConverter, SqlShowCreateCatalogConverter, SqlShowDatabasesConverter, SqlShowFunctionsConverter, SqlShowPartitionsConverter, SqlShowProcedureConverter, SqlShowTablesConverter, SqlShowViewsConverter, SqlTruncateTableConverter
```
public interface SqlNodeConverter<S extends org.apache.calcite.sql.SqlNode>
```
A converter to convert SqlNode instance into Operation.
By default, a SqlNodeConverter only matches a specific SqlNode class to convert which is defined by the parameter type S. But a SqlNodeConverter can also match a set of SqlNodes with the SqlKind if it defines the supportedSqlKinds().

See Also:

SqlNodeConverters

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static interface SqlNodeConverter.ConvertContext
Context of SqlNodeConverter.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`Operation`	`convertSqlNode(S node, SqlNodeConverter.ConvertContext context)`	Convert the given validated `SqlNode` into an `Operation`.
`default Optional<EnumSet<org.apache.calcite.sql.SqlKind>>`	`supportedSqlKinds()`	Returns the `SqlKinds` of `SqlNodes` that the `SqlNodeConverter` supports to convert.

- Method Detail
  - convertSqlNode
```
Operation convertSqlNode(S node,
                         SqlNodeConverter.ConvertContext context)
```
    Convert the given validated SqlNode into an Operation.
    
    Parameters:
    
    node - a validated SqlNode.
    
    context - the utilities and context information to convert
  - supportedSqlKinds
```
default Optional<EnumSet<org.apache.calcite.sql.SqlKind>> supportedSqlKinds()
```
    Returns the SqlKinds of SqlNodes that the SqlNodeConverter supports to convert.
    If a SqlNodeConverter returns a non-empty SqlKinds, The conversion framework will find the corresponding converter by matching the SqlKind of SqlNode instead of the class of SqlNode
    
    See Also:
    
    SqlQueryConverter