public override IAsyncResult BeginExecute(AsyncCallback callback, object state)
{
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
return(InternalBeginExecute(visitor.GetSelect(), visitor.Mappings, visitor.Alter, callback, state));
}
protected override string GetCql(out object[] values)
{
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
return(visitor.GetSelect(out values));
}
/// <summary>
/// Evaluates the Linq query, executes asynchronously the cql statement and adapts the results.
/// </summary>
public Task <IEnumerable <TEntity> > ExecuteAsync()
{
bool withValues = GetTable().GetSession().BinaryProtocolVersion > 1;
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
object[] values;
string cql = visitor.GetSelect(out values, withValues);
var adaptation =
InternalExecuteAsync(cql, values).ContinueWith((t) =>
{
var rs = t.Result;
QueryTrace = rs.Info.QueryTrace;
CqlColumn[] cols = rs.Columns;
var colToIdx = new Dictionary <string, int>();
for (int idx = 0; idx < cols.Length; idx++)
{
colToIdx.Add(cols[idx].Name, idx);
}
return(AdaptRows(rs, colToIdx, visitor));
}, TaskContinuationOptions.ExecuteSynchronously);
return(adaptation);
}
protected override string CqlString()
{
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
return(visitor.GetSelect());
}
protected override string GetCql(out object[] values)
{
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
visitor.Evaluate(Expression);
return(visitor.GetSelect(out values));
}
public override string ToString()
{
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
object[] _;
return(visitor.GetSelect(out _, false));
}
/// <summary>
/// Evaluates the Linq query, executes asynchronously the cql statement and adapts the results.
/// </summary>
public async Task <IEnumerable <TEntity> > ExecuteAsync()
{
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
object[] values;
var cql = visitor.GetSelect(Expression, out values);
var rs = await InternalExecuteAsync(cql, values).ConfigureAwait(false);
return(AdaptResult(cql, rs));
}
/// <summary>
/// Evaluates the Linq query, executes asynchronously the cql statement and adapts the results.
/// </summary>
public Task <IEnumerable <TEntity> > ExecuteAsync()
{
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
visitor.Evaluate(Expression);
object[] values;
var cql = visitor.GetSelect(out values);
return(InternalExecuteAsync(cql, values).Continue(t => AdaptResult(cql, t.Result)));
}
public override IAsyncResult BeginExecute(AsyncCallback callback, object state)
{
bool withValues = GetTable().GetSession().BinaryProtocolVersion > 1;
var visitor = new CqlExpressionVisitor();
visitor.Evaluate(Expression);
object[] values;
string cql = visitor.GetSelect(out values, withValues);
return(InternalBeginExecute(cql, values, visitor.Mappings, visitor.Alter, callback, state));
}
/// <summary>
/// Asynchronously executes the query and returns a task of a page of results
/// </summary>
public async Task <IPage <TEntity> > ExecutePagedAsync()
{
SetAutoPage(false);
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
object[] values;
var cql = visitor.GetSelect(Expression, out values);
var rs = await InternalExecuteAsync(cql, values).ConfigureAwait(false);
var mapper = MapperFactory.GetMapper <TEntity>(cql, rs);
return(new Page <TEntity>(rs.Select(mapper), PagingState, rs.PagingState));
}
/// <summary>
/// Evaluates the Linq query, executes asynchronously the cql statement and adapts the results.
/// </summary>
public Task <IEnumerable <TEntity> > ExecuteAsync()
{
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
visitor.Evaluate(Expression);
object[] values;
var cql = visitor.GetSelect(out values);
var adaptation = InternalExecuteAsync(cql, values).Continue(t =>
{
var rs = t.Result;
var mapper = MapperFactory.GetMapper <TEntity>(cql, rs);
return(rs.Select(mapper));
});
return(adaptation);
}
/// <summary>
/// Asynchronously executes the query with the provided execution profile and returns a task of a page of results
/// </summary>
public async Task <IPage <TEntity> > ExecutePagedAsync(string executionProfile)
{
if (executionProfile == null)
{
throw new ArgumentNullException(nameof(executionProfile));
}
SetAutoPage(false);
var visitor = new CqlExpressionVisitor(PocoData, Table.Name, Table.KeyspaceName);
var cql = visitor.GetSelect(Expression, out object[] values);
var rs = await InternalExecuteWithProfileAsync(executionProfile, cql, values).ConfigureAwait(false);
var mapper = MapperFactory.GetMapper <TEntity>(cql, rs);
return(new Page <TEntity>(rs.Select(mapper), PagingState, rs.PagingState));
}
public void StartsWith_Test()
{
var table = new Table<LinqDecoratedWithStringCkEntity>(null);
var query = table.Where(t => t.pk == "a" && t.ck1.StartsWith("foo") && t.pk == "bar");
var pocoData = MappingConfiguration.Global.MapperFactory.GetPocoData<LinqDecoratedWithStringCkEntity>();
var visitor = new CqlExpressionVisitor(pocoData, "x_ts", null);
visitor.Evaluate(query.Expression);
object[] parameters;
var queryCql = visitor.GetSelect(out parameters);
Assert.That(parameters, Is.EquivalentTo(new[] { "a", "foo", "foo" + Encoding.UTF8.GetString(new byte[] { 0xF4, 0x8F, 0xBF, 0xBF }), "bar" }));
Assert.AreEqual(@"SELECT ""x_pk"", ""x_ck1"", ""x_f1"" FROM ""x_ts"" WHERE ""x_pk"" = ? AND ""x_ck1"" >= ? AND ""x_ck1"" < ? AND ""x_pk"" = ?", queryCql);
}
