private SqlQuery ParseLimitQuery(ILimitQuery limitQuery, out SqlSubQueryResult parentResult)
{
var result = ParseQuery(limitQuery.Parent, out parentResult);
result.Limit = limitQuery.LimitIndex;
return(result);
}
private SqlQuery ParseOrderByQuery(IOrderByQuery orderByQuery, out SqlSubQueryResult parentResult)
{
var result = ParseQuery(orderByQuery.Parent, out parentResult);
result.OrderBys = ParseOrderByBuilder(parentResult, orderByQuery.OrderByBuilderExpression, new Dictionary <string, SqlSubQueryResult>());
return(result);
}
private SqlQuery ParseOffsetQuery(IOffsetQuery offsetQuery, out SqlSubQueryResult parentResult)
{
var result = ParseQuery(offsetQuery.Parent, out parentResult);
result.Offset = offsetQuery.OffsetIndex;
return(result);
}
void ParseJoinTableQuery(SqlSubQueryResult parentResult, SqlQuery joinFromSubQuery, IJoinQuery joinQuery, SqlQuery result, out SqlSubQueryResult joinResult)
{
// Parameters in both selector & join expressions: actx, a, bctx, b
var outerParameters = new Dictionary <string, SqlSubQueryResult>(SubqueryParameters);
outerParameters[joinQuery.JoinExpression.Parameters[0].Name] = parentResult;
outerParameters[joinQuery.JoinExpression.Parameters[1].Name] = parentResult;
outerParameters[joinQuery.JoinExpression.Parameters[2].Name] = joinFromSubQuery.SelectResult;
outerParameters[joinQuery.JoinExpression.Parameters[3].Name] = joinFromSubQuery.SelectResult;
var joinResultMembers = ParseSelectExpression(joinQuery.ResultExpression, outerParameters);
var joinInfo = new SqlJoinTable()
{
TableAlias = joinFromSubQuery.FromAlias,
FromSource = joinFromSubQuery.From,
JoinExpression = ParseExpression(joinQuery.JoinExpression.Body, outerParameters),
JoinResult = new SqlSubQueryResult()
{
Members = joinResultMembers,
},
JoinType = joinQuery.JoinType,
};
result.Joins.Add(joinInfo);
joinResult = joinInfo.JoinResult;
}
private SqlQuery ParseFromQuery(IFromQuery fromQuery, out SqlSubQueryResult selectResult)
{
var tableAlias = AliasProvider.CreateAlias();
selectResult = new SqlSubQueryResult()
{
Members = new List <SqlMember>()
};
foreach (var column in fromQuery.Columns)
{
selectResult.Members.Add(new SqlTableFieldMember()
{
MemberName = column.MemberName,
MemberInfo = column.PropertyInfo,
SqlName = column.SqlName,
TableAlias = tableAlias,
TableType = fromQuery.TableType,
FieldType = column.OriginalType,
});
}
return(new SqlQuery()
{
From = new SqlFromTable()
{
TableName = fromQuery.TableName,
},
FromAlias = tableAlias,
});
}
SqlQuery ParseGroupByQuery(Query query, IGroupByQuery groupByQuery, out SqlSubQueryResult parentResult)
{
var result = ParseQuery(query.Parent, out var tempParentResult);
var newExpression = groupByQuery.GroupExpression.Body as NewExpression;
var parameters = new Dictionary <string, SqlSubQueryResult>(SubqueryParameters);
parameters[groupByQuery.GroupExpression.Parameters[0].Name] = tempParentResult;
foreach (var argument in newExpression.Arguments)
{
result.GroupBys.Add(ParseExpression(argument, parameters));
}
var projectParameters = new Dictionary <string, SqlSubQueryResult>(SubqueryParameters);
projectParameters[groupByQuery.ProjectExpression.Parameters[0].Name] = tempParentResult; // ctx
projectParameters[groupByQuery.ProjectExpression.Parameters[1].Name] = tempParentResult;
parentResult = new SqlSubQueryResult()
{
Members = ParseSelectExpression(groupByQuery.ProjectExpression, projectParameters),
};
return(result);
}
SqlQuery ParseWhereQuery(IWhereQuery whereQuery, out SqlSubQueryResult parentResult)
{
var result = ParseQuery(whereQuery.Parent, out parentResult);
var parameters = new Dictionary <string, SqlSubQueryResult>(SubqueryParameters);
parameters[whereQuery.WhereExpression.Parameters[0].Name] = parentResult;
result.Wheres.Add(ParseExpression(whereQuery.WhereExpression.Body, parameters));
return(result);
}
SqlQuery ParseHavingQuery(Query query, IHavingQuery havingQuery, out SqlSubQueryResult parentResult)
{
var result = ParseQuery(query.Parent, out parentResult);
var parameters = new Dictionary <string, SqlSubQueryResult>(SubqueryParameters);
parameters[havingQuery.HavingExpression.Parameters[0].Name] = parentResult;
result.Havings.Add(ParseExpression(havingQuery.HavingExpression.Body, parameters));
return(result);
}
private SqlQuery ParseProjectConstantQuery(Query query, IProjectConstantQuery projectQuery, out SqlSubQueryResult parentResult)
{
var result = ParseQuery(query.Parent, out var tempParentResult);
var parameters = new Dictionary <string, SqlSubQueryResult>(SubqueryParameters);
parameters[projectQuery.SelectExpression.Parameters[0].Name] = tempParentResult; // ctx
parentResult = new SqlSubQueryResult()
{
Members = ParseSelectExpression(projectQuery.SelectExpression, parameters)
};
return(result);
}
SqlQuery ParseJoinQuery(IJoinQuery joinQuery, out SqlSubQueryResult parentResult)
{
var result = ParseQuery(joinQuery.Parent, out var tempParentResult);
var joinFromSubQuery = ParseQuery(joinQuery.JoinTable);
if (joinQuery.JoinTable is IFromQuery)
{
ParseJoinTableQuery(tempParentResult, joinFromSubQuery, joinQuery, result, out parentResult);
return(result);
}
else
{
ParseJoinSubQuery(tempParentResult, joinFromSubQuery, joinQuery, result, out parentResult);
return(result);
}
}
void ParseJoinSubQuery(SqlSubQueryResult parentResult, SqlQuery joinFromSubQuery, IJoinQuery joinQuery, SqlQuery result, out SqlSubQueryResult joinResult)
{
var joinAlias = AliasProvider.CreateAlias();
// Translate fields from inside the subquery to fields rooted in the subquery usable from the outside
var tempFromSubQuery = new SqlSubQueryResult()
{
Members = joinFromSubQuery.SelectResult.Members.Select(m => new SqlJoinFieldMember()
{
JoinAlias = joinAlias,
SourceField = m,
MemberName = m.MemberName,
MemberInfo = m.MemberInfo,
SqlName = m.MemberName,
FieldType = m.FieldType,
}).ToList <SqlMember>(),
};
// Parameters in both selector & join expressions: actx, a, bctx, b
var outerParameters = new Dictionary <string, SqlSubQueryResult>(SubqueryParameters);
outerParameters[joinQuery.JoinExpression.Parameters[0].Name] = parentResult;
outerParameters[joinQuery.JoinExpression.Parameters[1].Name] = parentResult;
outerParameters[joinQuery.JoinExpression.Parameters[2].Name] = tempFromSubQuery;
outerParameters[joinQuery.JoinExpression.Parameters[3].Name] = tempFromSubQuery;
var joinResultMembers = ParseSelectExpression(joinQuery.ResultExpression, outerParameters);
var joinInfo = new SqlJoinSubQuery()
{
JoinAlias = joinAlias,
JoinResult = new SqlSubQueryResult()
{
Members = joinResultMembers,
},
JoinFrom = joinFromSubQuery,
JoinExpression = ParseExpression(joinQuery.JoinExpression.Body, outerParameters),
JoinType = joinQuery.JoinType,
};
result.Joins.Add(joinInfo);
joinResult = joinInfo.JoinResult;
}
private SqlQuery ParseSelectQuery(Query query, ISelectQuery selectQuery, out SqlSubQueryResult parentResult)
{
var joinAlias = AliasProvider.CreateAlias();
var result = ParseQuery(query.Parent, out var tempParentResult);
var parameters = new Dictionary <string, SqlSubQueryResult>(SubqueryParameters);
parameters[selectQuery.SelectExpression.Parameters[0].Name] = tempParentResult; // ctx
parameters[selectQuery.SelectExpression.Parameters[1].Name] = tempParentResult; // item
result.SelectResult = new SqlSubQueryResult()
{
Members = ParseSelectExpression(selectQuery.SelectExpression, parameters)
};
parentResult = new SqlSubQueryResult()
{
Members = result.SelectResult.Members.Select(m => new SqlJoinFieldMember()
{
JoinAlias = joinAlias,
SourceField = m,
MemberName = m.MemberName,
MemberInfo = m.MemberInfo,
SqlName = m.SqlName,
FieldType = m.FieldType,
}).ToList <SqlMember>(),
};
return(new SqlQuery()
{
From = new SqlFromSubQuery()
{
FromQuery = result,
},
FromAlias = joinAlias,
});
}
public SqlQuery ParseQuery(Query query, out SqlSubQueryResult selectResult)
{
if (query == null)
{
// SELECTs without FROM have empty result
selectResult = new SqlSubQueryResult()
{
Members = new List <SqlMember>(),
};
return(new SqlQuery());
}
var fromQuery = query as IFromQuery;
if (fromQuery != null)
{
return(ParseFromQuery(fromQuery, out selectResult));
}
var whereQuery = query as IWhereQuery;
if (whereQuery != null)
{
return(ParseWhereQuery(whereQuery, out selectResult));
}
var joinQuery = query as IJoinQuery;
if (joinQuery != null)
{
return(ParseJoinQuery(joinQuery, out selectResult));
}
var groupByQuery = query as IGroupByQuery;
if (groupByQuery != null)
{
return(ParseGroupByQuery(query, groupByQuery, out selectResult));
}
var havingQuery = query as IHavingQuery;
if (havingQuery != null)
{
return(ParseHavingQuery(query, havingQuery, out selectResult));
}
/*var selectAggregateQuery = query as ISelectAggregateQuery;
* if (selectAggregateQuery != null)
* {
* return ParseSelectAggregateQuery(query, selectAggregateQuery, out selectResult);
* }*/
var projectQuery = query as IProjectQuery;
if (projectQuery != null)
{
return(ParseProjectQuery(query, projectQuery, out selectResult));
}
var projectConstantQuery = query as IProjectConstantQuery;
if (projectConstantQuery != null)
{
return(ParseProjectConstantQuery(query, projectConstantQuery, out selectResult));
}
var selectQuery = query as ISelectQuery;
if (selectQuery != null)
{
// Wråp in subquery
return(ParseSelectQuery(query, selectQuery, out selectResult));
}
var orderByQuery = query as IOrderByQuery;
if (orderByQuery != null)
{
return(ParseOrderByQuery(orderByQuery, out selectResult));
}
var offsetQuery = query as IOffsetQuery;
if (offsetQuery != null)
{
return(ParseOffsetQuery(offsetQuery, out selectResult));
}
var limitQuery = query as ILimitQuery;
if (limitQuery != null)
{
return(ParseLimitQuery(limitQuery, out selectResult));
}
throw new NotImplementedException("Unhandled query component");
}
private SqlSelectorExpression ParseAggregateSelector(LambdaExpression lambdaExpr, Dictionary <string, SqlSubQueryResult> parameters, SqlSubQueryResult selectorSource)
{
var xprm = new Dictionary <string, SqlSubQueryResult>(parameters);
xprm[lambdaExpr.Parameters[0].Name] = selectorSource;
return(new SqlSelectorExpression()
{
SelectorExpression = ParseExpression(lambdaExpr.Body, xprm),
});
}
