internal static GroupByStage CreateStaticGroupBy(
Type inputType,
SqlTypeInfo previousStageTypeInfo,
ParameterExpression previousStageParameterExpression,
FromAliases fromAliases)
{
var tupleType = GetTupleType(typeof(int));
var groupingType = GetGroupingType(tupleType, inputType);
//There is no group by, so there is no key or possibility to select anything else than aggregations
var keyTypeInfo = SqlTypeInfo.NewBuilder().Build();
var groupParameter = Expression.Parameter(groupingType);
var keyParameterExpression = GetKeyParameterExpression(groupingType, groupParameter);
var constructor = tupleType.GetConstructor(new[] { typeof(int) });
var groupByExpression = Expression.New(constructor, new[] { Expression.Constant(1) });
return(new GroupByStage(
groupingType,
inputType,
previousStageTypeInfo,
keyTypeInfo,
groupParameter,
keyParameterExpression,
previousStageParameterExpression,
groupByExpression,
tupleType,
fromAliases
));
}
public DistinctStage(
SqlTypeInfo sqlTypeInfo,
ParameterExpression parameterExpression,
Type type,
FromAliases fromAliases
)
{
TypeInfo = sqlTypeInfo;
ParameterExpression = parameterExpression;
CurrentType = type;
FromAliases = fromAliases;
}
public OrderByStage(
Type currentType,
SqlTypeInfo typeInfo,
ParameterExpression parameterExpression,
FromAliases fromAliases,
IImmutableList <SortItem> sortItems)
{
CurrentType = currentType;
TypeInfo = typeInfo;
ParameterExpression = parameterExpression;
FromAliases = fromAliases;
SortItems = sortItems;
}
public WhereStage(
SqlTypeInfo sqlTypeInfo,
ParameterExpression parameterExpression,
Expression whereExpression,
Type type,
FromAliases fromAliases,
bool containsFullTextSearch
)
{
TypeInfo = sqlTypeInfo;
ParameterExpression = parameterExpression;
WhereExpression = whereExpression;
CurrentType = type;
FromAliases = fromAliases;
ContainsFullTextSearch = containsFullTextSearch;
}
public OffsetStage(
SqlTypeInfo sqlTypeInfo,
ParameterExpression parameterExpression,
Type type,
FromAliases fromAliases,
int?skip,
int?take
)
{
TypeInfo = sqlTypeInfo;
ParameterExpression = parameterExpression;
CurrentType = type;
FromAliases = fromAliases;
Skip = skip;
Take = take;
}
public SelectStage(
SqlTypeInfo sqlTypeInfo,
ParameterExpression parameterExpression,
MemberInitExpression selectExpression,
Type newType,
Type oldType,
ParameterExpression inParameterExpression,
FromAliases fromAliases,
IImmutableList <ColumnMetadata> columns)
{
TypeInfo = sqlTypeInfo;
ParameterExpression = parameterExpression;
SelectExpression = selectExpression;
CurrentType = newType;
OldType = oldType;
InParameterExpression = inParameterExpression;
FromAliases = fromAliases;
Columns = columns;
}
public HavingStage(
Type currentType,
Type valueType,
SqlTypeInfo mainTypeInfo,
SqlTypeInfo keyTypeInfo,
ParameterExpression groupParameterExpression,
Expression keyParameterExpression,
ParameterExpression valueParameterExpression,
FromAliases fromAliases,
Expression filterExpression)
{
CurrentType = currentType;
ValueType = valueType;
TypeInfo = mainTypeInfo;
KeyTypeInfo = keyTypeInfo;
ParameterExpression = groupParameterExpression;
KeyParameterExpression = keyParameterExpression;
ValueParameterExpression = valueParameterExpression;
FromAliases = fromAliases;
FilterExpression = filterExpression;
}
public GroupedOrderByStage(
Type currentType,
Type valueType,
SqlTypeInfo mainTypeInfo,
SqlTypeInfo keyTypeInfo,
ParameterExpression groupParameterExpression,
Expression keyParameterExpression,
ParameterExpression valueParameterExpression,
FromAliases fromAliases,
IImmutableList <SortItem> sortItems)
{
CurrentType = currentType;
ValueType = valueType;
TypeInfo = mainTypeInfo;
KeyTypeInfo = keyTypeInfo;
ParameterExpression = groupParameterExpression;
KeyParameterExpression = keyParameterExpression;
ValueParameterExpression = valueParameterExpression;
FromAliases = fromAliases;
SortItems = sortItems;
}
public override void VisitFromClause(FromClause fromClause)
{
var tableReference = fromClause.TableReference;
if (tableReference is FromTableReference namedTableReference)
{
var tableName = namedTableReference.TableName;
Debug.Assert(tableName != null);
if (!_visitorMetadata.TablesMetadata.TryGetTable(tableName, out _table))
{
throw new SqlErrorException($"The table '{tableName}' was not found");
}
//Add the table name to the aliases as well, to support using the tablename infront of columns
FromAliases.AddAlias(tableName);
var alias = namedTableReference?.Alias;
if (alias != null)
{
FromAliases.AddAlias(alias);
}
}
else if (tableReference is Subquery queryDerivedTable)
{
MainVisitor mainVisitor = new MainVisitor(_visitorMetadata);
queryDerivedTable.Accept(mainVisitor);
Stages = mainVisitor.Stages;
var alias = queryDerivedTable?.Alias;
if (alias != null)
{
FromAliases.AddAlias(alias);
}
}
else
{
throw new SqlErrorException("Subqueries or joins are not supported at this time");
}
}
public FromTableStage(
string tableName,
SqlTypeInfo sqlTypeInfo,
ParameterExpression parameterExpression,
Type currentType,
FromAliases fromAliases,
IReadSqlParameters parameters)
{
Debug.Assert(tableName != null, $"{nameof(tableName)} was null");
Debug.Assert(sqlTypeInfo != null, $"{nameof(sqlTypeInfo)} was null");
Debug.Assert(parameterExpression != null, $"{nameof(parameterExpression)} was null");
Debug.Assert(currentType != null, $"{nameof(currentType)} was null");
Debug.Assert(fromAliases != null, $"{nameof(fromAliases)} was null");
Debug.Assert(parameters != null, $"{nameof(parameters)} was null");
TableName = tableName;
TypeInfo = sqlTypeInfo;
ParameterExpression = parameterExpression;
CurrentType = currentType;
FromAliases = fromAliases;
Parameters = parameters;
}
public GroupByStage(
Type currentType,
Type valueType,
SqlTypeInfo mainTypeInfo,
SqlTypeInfo keyTypeInfo,
ParameterExpression groupParameterExpression,
Expression keyParameterExpression,
ParameterExpression valueParameterExpression,
Expression groupByExpression,
Type keyType,
FromAliases fromAliases)
{
CurrentType = currentType;
ValueType = valueType;
TypeInfo = mainTypeInfo;
KeyTypeInfo = keyTypeInfo;
ParameterExpression = groupParameterExpression;
KeyParameterExpression = keyParameterExpression;
ValueParameterExpression = valueParameterExpression;
GroupByExpression = groupByExpression;
KeyType = keyType;
FromAliases = fromAliases;
}
public SelectAggregateFunctionStage(
SqlTypeInfo sqlTypeInfo,
ParameterExpression parameterExpression,
Type currentType,
Type oldType,
FromAliases fromAliases,
string functionName,
ParameterExpression inParameter,
string columnName,
IImmutableList <Expression> parameters,
Type functionOutType
)
{
TypeInfo = sqlTypeInfo;
ParameterExpression = parameterExpression;
CurrentType = currentType;
FromAliases = fromAliases;
FunctionName = functionName;
InParameter = inParameter;
OldType = oldType;
ColumnName = columnName;
Parameters = parameters;
FunctionOutType = functionOutType;
}
