/// <summary>
/// Create a <see cref="SqlStatement"/> that contains all the needed information to execute the query
/// as an INNER JOIN of any one of the other queries that uses it as a principal query
/// IMPORTANT: Calling this method will keep a permanent cache of some parts of the result, therefore
/// if the arguments need to change after that, a new <see cref="QueryInternal"/> must be created
/// </summary>
private string PrepareStatementAsPrincipal(
Func <Type, string> sources,
SqlStatementParameters ps,
bool isAncestorExpand,
ArraySegment <string> pathToCollectionProperty,
int userId,
DateTime?userToday)
{
// (1) Prepare the JOIN's clause
JoinTree joinTree = PrepareJoin(pathToCollectionProperty);
var joinSql = joinTree.GetSql(sources, FromSql);
// (2) Prepare the SELECT clause
SqlSelectClause selectClause = PrepareSelectAsPrincipal(joinTree, pathToCollectionProperty, isAncestorExpand);
var selectSql = selectClause.ToSql(IsAncestorExpand);
// (3) Prepare the inner join with the principal query (if any)
string principalQuerySql = PreparePrincipalQuery(sources, ps, userId, userToday);
// (4) Prepare the WHERE clause
string whereSql = PrepareWhere(sources, joinTree, ps, userId, userToday);
// (5) Prepare the ORDERBY clause
string orderbySql = PrepareOrderBy(joinTree);
// (6) Prepare the OFFSET and FETCH clauses
string offsetFetchSql = PrepareOffsetFetch();
if (string.IsNullOrWhiteSpace(offsetFetchSql))
{
// In a principal query, order by is only added if there is an offset-fetch (usually in the root query)
orderbySql = "";
}
// (7) Finally put together the final SQL statement and return it
string sql = QueryTools.CombineSql(
selectSql: selectSql,
joinSql: joinSql,
principalQuerySql: principalQuerySql,
whereSql: whereSql,
orderbySql: orderbySql,
offsetFetchSql: offsetFetchSql,
groupbySql: null
);
// (8) Return the result
return(sql);
}
// Functionality
/// <summary>
/// Create a <see cref="SqlStatement"/> that contains all the needed information to execute the query against a SQL Server database and load and hydrate the entities
/// IMPORTANT: Calling this method will keep a permanent cache of some parts of the result, therefore if the arguments need to change after
/// that, a new <see cref="QueryInternal"/> must be created
/// </summary>
public SqlStatement PrepareStatement(
Func <Type, string> sources,
SqlStatementParameters ps,
int userId,
DateTime?userToday)
{
// (1) Prepare the JOIN's clause
var joinTree = PrepareJoin();
var joinSql = joinTree.GetSql(sources, FromSql);
// (2) Prepare the SELECT clause
SqlSelectClause selectClause = PrepareSelect(joinTree);
var selectSql = selectClause.ToSql(IsAncestorExpand);
// (3) Prepare the inner join with the principal query (if any)
string principalQuerySql = PreparePrincipalQuery(sources, ps, userId, userToday);
// (4) Prepare the WHERE clause
string whereSql = PrepareWhere(sources, joinTree, ps, userId, userToday);
// (5) Prepare the ORDERBY clause
string orderbySql = PrepareOrderBy(joinTree);
// (6) Prepare the OFFSET and FETCH clauses
string offsetFetchSql = PrepareOffsetFetch();
// (7) Finally put together the final SQL statement and return it
string sql = QueryTools.CombineSql(
selectSql: selectSql,
joinSql: joinSql,
principalQuerySql: principalQuerySql,
whereSql: whereSql,
orderbySql: orderbySql,
offsetFetchSql: offsetFetchSql,
groupbySql: null
);
// (8) Return the result
return(new SqlStatement
{
Sql = sql,
ResultType = ResultType,
ColumnMap = selectClause.GetColumnMap(),
Query = this,
});
}
