XPathToSQL2Converter (Jackrabbit Oak 1.78.0 API)

java.lang.Object
- org.apache.jackrabbit.oak.query.xpath.XPathToSQL2Converter

```
public class XPathToSQL2Converter
extends Object
```
This class can can convert a XPATH query to a SQL2 query.

Field Summary

Fields
Modifier and Type	Field	Description
`static boolean`	`NODETYPE_OPTIMIZATION`	Optimize queries of the form "from [nt:base] where [jcr:primaryType] = 'x'" to "from [x] where [jcr:primaryType] = 'x'".
`static boolean`	`NODETYPE_UNION`	Convert queries of the form "where [jcr:primaryType] = 'x' or [jcr:primaryType] = 'y'" to "select ...

Constructor Summary

Constructors
Constructor Description

XPathToSQL2Converter()

XPathToSQL2Converter(QueryEngineSettings settings)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

String convert(String query)
Convert the query to SQL2.
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - NODETYPE_OPTIMIZATION
```
public static final boolean NODETYPE_OPTIMIZATION
```
    Optimize queries of the form "from [nt:base] where [jcr:primaryType] = 'x'" to "from [x] where [jcr:primaryType] = 'x'". Enabled by default.
  - NODETYPE_UNION
```
public static final boolean NODETYPE_UNION
```
    Convert queries of the form "where [jcr:primaryType] = 'x' or [jcr:primaryType] = 'y'" to "select ... where [jcr:primaryType] = 'x' union select ... where [jcr:primaryType] = 'y'". If disabled, only one query with "where [jcr:primaryType] in ('x', 'y') is used. Enabled by default.
- Constructor Detail
  - XPathToSQL2Converter
```
public XPathToSQL2Converter()
```
  - XPathToSQL2Converter
```
public XPathToSQL2Converter(QueryEngineSettings settings)
```
- Method Detail
  - convert
```
public String convert(String query)
               throws ParseException
```
    Convert the query to SQL2.
    
    Parameters:
    
    query - the query string
    
    Returns:
    
    the SQL2 query
    
    Throws:
    
    ParseException - if parsing fails