ModifiableView (Apache Calcite API)

All Superinterfaces:

Table

All Known Implementing Classes:

ModifiableViewTable
```
public interface ModifiableView
extends Table
```
A modifiable view onto ModifiableTable.
It describes how its columns map onto the underlying table's columns, and any constraints that incoming rows must satisfy.
For example, given
```
   CREATE TABLE emps (empno INTEGER, gender VARCHAR(1), deptno INTEGER);
   CREATE VIEW female_emps AS
     SELECT empno, deptno FROM emps WHERE gender = 'F';
 
```
constraint is $1 = 'F' and column mapping is [0, 2].
NOTE: The current API is inefficient and experimental. It will change without notice.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`ImmutableIntList`	`getColumnMapping()`	Returns the column mapping onto another table.
`RexNode`	`getConstraint(RexBuilder rexBuilder, RelDataType tableRowType)`	Returns a constraint that each candidate row must satisfy.
`Table`	`getTable()`	Returns the underlying table.
`Path`	`getTablePath()`	Returns the full path of the underlying table.

Methods inherited from interface org.apache.calcite.schema.Table
getJdbcTableType, getRowType, getStatistic, isRolledUp, rolledUpColumnValidInsideAgg

- Method Detail
  - getConstraint
```
RexNode getConstraint(RexBuilder rexBuilder,
                      RelDataType tableRowType)
```
    Returns a constraint that each candidate row must satisfy.
    Never null; if there is no constraint, returns "true".
    
    Parameters:
    
    rexBuilder - Rex builder
    
    tableRowType - Row type of the table that this view maps onto
  - getColumnMapping
```
ImmutableIntList getColumnMapping()
```
    Returns the column mapping onto another table.
    mapping[i] contains the column of the underlying table that the ith column of the view comes from, or -1 if it is based on an expression.
  - getTable
```
Table getTable()
```
    Returns the underlying table.
  - getTablePath
```
Path getTablePath()
```
    Returns the full path of the underlying table.