Package org.ehrbase.aql.sql

Class QueryProcessor

java.lang.Object

org.ehrbase.aql.sql.queryimpl.TemplateMetaData

org.ehrbase.aql.sql.QueryProcessor

public class QueryProcessor
extends TemplateMetaData

Perform an assembled SQL query depending on its strategy

The strategy depends on whether the query contains elements which path depends on the context (e.g. a composition).

• If a query contains path expression that need to be resolved, the query process consists in evaluating the path for each composition (iteration)
• If the query contains only static fields (columns), a single query execution is done.

Created by christian on 4/28/2016.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	QueryProcessor.AqlSelectQuery

Field Summary

Fields

Modifier and Type	Field	Description
static final String	NIL_TEMPLATE

Fields inherited from class org.ehrbase.aql.sql.queryimpl.TemplateMetaData

introspectCache

Constructor Summary

Constructors

Constructor	Description
QueryProcessor(I_DomainAccess domainAccess, IntrospectService introspectCache, Contains contains, Statements statements, String serverNodeId)

Method Summary

Modifier and Type	Method	Description
QueryProcessor.AqlSelectQuery	buildAqlSelectQuery()
AqlResult	execute()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

NIL_TEMPLATE

public static final String NIL_TEMPLATE

See Also:

• Constant Field Values

Constructor Details

QueryProcessor

public QueryProcessor(I_DomainAccess domainAccess,
 IntrospectService introspectCache,
 Contains contains,
 Statements statements,
 String serverNodeId)

Method Details

execute

public AqlResult execute()

buildAqlSelectQuery

public QueryProcessor.AqlSelectQuery buildAqlSelectQuery()