public DbEntityProvider(DbConnection connection, QueryLanguage language, QueryMapping mapping, QueryPolicy policy)
: base(language, mapping, policy)
{
if (connection == null)
{
throw new InvalidOperationException("Connection not specified");
}
this.connection = connection;
}
public static SelectExpression AddRedundantSelect(this SelectExpression sel, QueryLanguage language, TableAlias newAlias)
{
var newColumns =
from d in sel.Columns
let qt = (d.Expression is ColumnExpression) ? ((ColumnExpression)d.Expression).QueryType : language.TypeSystem.GetColumnType(d.Expression.Type)
select new ColumnDeclaration(d.Name, new ColumnExpression(d.Expression.Type, qt, newAlias, d.Name), qt);
var newFrom = new SelectExpression(newAlias, sel.Columns, sel.From, sel.Where, sel.OrderBy, sel.GroupBy, sel.IsDistinct, sel.Skip, sel.Take, sel.IsReverse);
return(new SelectExpression(sel.Alias, newColumns, newFrom, null, null, null, false, null, null, false));
}
public EntityProvider(QueryLanguage language, QueryMapping mapping, QueryPolicy policy)
{
if (language == null)
{
throw new InvalidOperationException("Language not specified");
}
if (mapping == null)
{
throw new InvalidOperationException("Mapping not specified");
}
if (policy == null)
{
throw new InvalidOperationException("Policy not specified");
}
this.language = language;
this.mapping = mapping;
this.policy = policy;
this.tables = new Dictionary <MappingEntity, IEntityTable>();
}
public QueryTranslator(QueryLanguage language, QueryMapping mapping, QueryPolicy policy)
{
this.linguist = language.CreateLinguist(this);
this.mapper = mapping.CreateMapper(this);
this.police = policy.CreatePolice(this);
}
public static Expression Rewrite(QueryLanguage language, Expression expression)
{
return(new CrossApplyRewriter(language).Visit(expression));
}
private CrossApplyRewriter(QueryLanguage language)
{
this.language = language;
}
private OrderByRewriter(QueryLanguage language)
{
this.language = language;
this.isOuterMostSelect = true;
}
public static Expression Parameterize(QueryLanguage language, Expression expression)
{
return(new Parameterizer(language).Visit(expression));
}
private SkipToRowNumberRewriter(QueryLanguage language)
{
this.language = language;
}
public static Expression Rewrite(QueryLanguage language, Expression expression)
{
return(new SkipToNestedOrderByRewriter(language).Visit(expression));
}
private SkipToNestedOrderByRewriter(QueryLanguage language)
{
this.language = language;
}
public static Expression Rewrite(QueryPolicy policy, QueryLanguage language, Expression expression)
{
return(new ClientJoinedProjectionRewriter(policy, language).Visit(expression));
}
private ClientJoinedProjectionRewriter(QueryPolicy policy, QueryLanguage language)
{
this.policy = policy;
this.language = language;
}
public static Expression Rewrite(QueryLanguage language, Expression expr)
{
return(new AggregateRewriter(language, expr).Visit(expr));
}
private AggregateRewriter(QueryLanguage language, Expression expr)
{
this.language = language;
this.map = new Dictionary <AggregateSubqueryExpression, Expression>();
this.lookup = AggregateGatherer.Gather(expr).ToLookup(a => a.GroupByAlias);
}
public QueryLinguist(QueryLanguage language, QueryTranslator translator)
{
this.language = language;
this.translator = translator;
}
private Parameterizer(QueryLanguage language)
{
this.language = language;
}
public static Expression Rewrite(QueryLanguage language, Expression expression)
{
return(new SkipToRowNumberRewriter(language).Visit(expression));
}
private RelationshipBinder(QueryMapper mapper)
{
this.mapper = mapper;
this.mapping = mapper.Mapping;
this.language = mapper.Translator.Linguist.Language;
}
private SingletonProjectionRewriter(QueryLanguage language)
{
this.language = language;
}
public static Expression Rewrite(QueryLanguage language, Expression expression)
{
return(new SingletonProjectionRewriter(language).Visit(expression));
}
public static ProjectionExpression AddOuterJoinTest(this ProjectionExpression proj, QueryLanguage language, Expression expression)
{
string colName = proj.Select.Columns.GetAvailableColumnName("Test");
var colType = language.TypeSystem.GetColumnType(expression.Type);
SelectExpression newSource = proj.Select.AddColumn(new ColumnDeclaration(colName, expression, colType));
Expression newProjector =
new OuterJoinedExpression(
new ColumnExpression(expression.Type, colType, newSource.Alias, colName),
proj.Projector
);
return(new ProjectionExpression(newSource, newProjector, proj.Aggregator));
}
