RelOptSchema (Apache Calcite API)

All Known Subinterfaces:: Prepare.CatalogReader, RelOptSchemaWithSampling

All Known Implementing Classes:: CalciteCatalogReader, MockCatalogReader, MockCatalogReaderDynamic, MockCatalogReaderExtended, MockCatalogReaderSimple

public interface RelOptSchema

A RelOptSchema is a set of RelOptTable objects.

Method Summary

Modifier and Type

Method

Description

@Nullable RelOptTable

getTableForMember(List<String> names)

Retrieves a RelOptTable based upon a member access.

RelDataTypeFactory

getTypeFactory()

Returns the type factory used to generate types for this schema.

void

registerRules(RelOptPlanner planner)

Registers all of the rules supported by this schema.

Method Details
- getTableForMember
  
  @Nullable RelOptTable getTableForMember(List<String> names)
  
  Retrieves a RelOptTable based upon a member access.
  For example, the Saffron expression salesSchema.emps would be resolved using a call to salesSchema.getTableForMember(new String[]{"emps" }).
  Note that name.length is only greater than 1 for queries originating from JDBC.
  
  Parameters:
  
  names - Qualified name
- getTypeFactory
  
  RelDataTypeFactory getTypeFactory()
  
  Returns the type factory used to generate types for this schema.
- registerRules
  
  void registerRules(RelOptPlanner planner) throws Exception
  
  Registers all of the rules supported by this schema. Only called by RelOptPlanner.registerSchema(org.apache.calcite.plan.RelOptSchema).
  
  Throws:
  
  Exception