SPIReadOnlyControl (PL/Java backend Java code 1.6.8)

All Known Implementing Classes:

SPIPreparedStatement, SPIStatement
```
public interface SPIReadOnlyControl
```
An extended interface on Statement (accessible with unwrap()) allowing control of the read_only flag that PostgreSQL SPI will see when the statement is next executed.
Currently an internal interface, not in pljava-api, as the known need so far is just for the internal class loader.

Method Summary

Modifier and Type	Method	Description
`void`	`clearReadOnly()`	Specify that the statement, when next executed, will have have `read_only` set to `false` unconditionally.
`void`	`defaultReadOnly()`	Specify that the statement, when next executed, will have the behavior recommended in the PostgreSQL SPI documentation: `read_only` will be set to `true` if the currently-executing PL/Java function is declared `IMMUTABLE`, `false` otherwise.
`void`	`forceReadOnly()`	Specify that the statement, when next executed, will have have `read_only` set to `true` unconditionally.

- Method Detail
  - defaultReadOnly
```
void defaultReadOnly()
```
    Specify that the statement, when next executed, will have the behavior recommended in the PostgreSQL SPI documentation: read_only will be set to true if the currently-executing PL/Java function is declared IMMUTABLE, false otherwise.
  - forceReadOnly
```
void forceReadOnly()
```
    Specify that the statement, when next executed, will have have read_only set to true unconditionally.
  - clearReadOnly
```
void clearReadOnly()
```
    Specify that the statement, when next executed, will have have read_only set to false unconditionally.