TableFactory (Apache Calcite API)

Type Parameters:

T - Sub-type of table created by this factory

All Known Implementing Classes:

CsvStreamTableFactory, CsvTableFactory, DruidTableFactory, PigTableFactory, PreferredAlbumsTableFactory, PreferredGenresTableFactory
```
public interface TableFactory<T extends Table>
```
Factory for Table objects.
A table factory allows you to include custom tables in a model file. For example, here is a model that contains a custom table that generates a range of integers.
```
{
   version: '1.0',
   defaultSchema: 'MATH',
   schemas: [
     {
       name: 'MATH',
       tables: [
         {
           name: 'INTEGERS',
           type: 'custom',
           factory: 'com.acme.IntegerTable',
           operand: {
             start: 3,
             end: 7,
             column: 'N'
           }
         }
       ]
     }
   ]
 }
```
Given that schema, the query
```
SELECT * FROM math.integers
```
returns
```
 +---+
 | N |
 +---+
 | 3 |
 | 4 |
 | 5 |
 | 6 |
 +---+
 
```
A class that implements TableFactory specified in a schema must have a public default constructor.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`T`	`create(SchemaPlus schema, java.lang.String name, java.util.Map<java.lang.String,java.lang.Object> operand, RelDataType rowType)`	Creates a Table.

- Method Detail
  - create
```
T create(SchemaPlus schema,
         java.lang.String name,
         java.util.Map<java.lang.String,java.lang.Object> operand,
         RelDataType rowType)
```
    Creates a Table.
    
    Parameters:
    
    schema - Schema this table belongs to
    
    name - Name of this table
    
    operand - The "operand" JSON property
    
    rowType - Row type. Specified if the "columns" JSON property.