public static void GenSql(this DmlfJoinType join, ISqlDumper dmp)
{
switch (join)
{
case DmlfJoinType.Inner:
dmp.Put("^inner ^join");
break;
case DmlfJoinType.Left:
dmp.Put("^left ^join");
break;
case DmlfJoinType.Right:
dmp.Put("^right ^join");
break;
case DmlfJoinType.Outer:
dmp.Put("^full ^outer ^join");
break;
case DmlfJoinType.CrossApply:
dmp.Put("^cross ^apply");
break;
case DmlfJoinType.OuterApply:
dmp.Put("^outer ^apply");
break;
}
}
private DmlfSource DoAddOrFindRelation(DmlfSource baseSource, NameWithSchema baseTable, StructuredIdentifier relationJoined, StructuredIdentifier relationToJoin, DatabaseInfo db, DmlfJoinType joinType)
{
if (relationToJoin.IsEmpty) return baseSource;
string relName = relationToJoin.First;
string alias = String.Format("_REF{0}_{1}", relationJoined.NameItems.Select(x => "_" + x).CreateDelimitedText(""), relName);
var source = FindSourceByAlias(alias);
if (source == null)
{
var baseTableInfo = db.FindTable(baseTable);
var fk = baseTableInfo.ForeignKeys.FirstOrDefault(x => System.String.Compare(x.ConstraintName, relName, StringComparison.OrdinalIgnoreCase) == 0);
if (fk == null)
{
var column = baseTableInfo.FindColumn(relName);
if (column != null) fk = column.GetForeignKeys().FirstOrDefault(x => x.Columns.Count == 1);
}
if (fk == null) return null;
source = new DmlfSource
{
TableOrView = fk.RefTableFullName,
Alias = alias,
};
var relation = new DmlfRelation
{
Reference = source,
JoinType = joinType,
};
for (int i = 0; i < fk.Columns.Count; i++)
{
relation.Conditions.Add(new DmlfEqualCondition
{
LeftExpr = new DmlfColumnRefExpression
{
Column = new DmlfColumnRef
{
ColumnName = fk.Columns[0].RefColumnName,
Source = baseSource,
}
},
RightExpr = new DmlfColumnRefExpression
{
Column = new DmlfColumnRef
{
ColumnName = fk.RefColumns[0].RefColumnName,
Source = source,
}
},
});
Relations.Add(relation);
}
}
if (relationToJoin.IsEmpty) return source;
return DoAddOrFindRelation(source, source.TableOrView, relationJoined/relationToJoin.First, relationToJoin.WithoutFirst, db, joinType);
}
public DmlfColumnRef GetColumnRef(DmlfSource baseSource, NameWithSchema baseTable, StructuredIdentifier columnId, DatabaseInfo db, DmlfJoinType joinType)
{
var relationId = columnId.WithoutLast;
string column = columnId.Last;
var source = AddOrFindRelation(baseSource, baseTable, relationId, db, joinType);
if (source == null) return null;
return new DmlfColumnRef
{
ColumnName = column,
Source = source,
};
}
public DmlfSource AddOrFindRelation(DmlfSource baseSource, NameWithSchema baseTable, StructuredIdentifier relationId, DatabaseInfo db, DmlfJoinType joinType)
{
return DoAddOrFindRelation(baseSource, baseTable, new StructuredIdentifier(), relationId, db, joinType);
}
private DmlfSource DoAddOrFindRelation(DmlfSource baseSource, NameWithSchema baseTable, StructuredIdentifier relationJoined, StructuredIdentifier relationToJoin, DatabaseInfo db, DmlfJoinType joinType)
{
if (relationToJoin.IsEmpty)
{
return(baseSource);
}
string relName = relationToJoin.First;
string alias = String.Format("_REF{0}_{1}", relationJoined.NameItems.Select(x => "_" + x).CreateDelimitedText(""), relName);
var source = FindSourceByAlias(alias);
if (source == null)
{
var baseTableInfo = db.FindTable(baseTable);
var fk = baseTableInfo.ForeignKeys.FirstOrDefault(x => System.String.Compare(x.ConstraintName, relName, StringComparison.OrdinalIgnoreCase) == 0);
if (fk == null)
{
var column = baseTableInfo.FindColumn(relName);
if (column != null)
{
fk = column.GetForeignKeys().FirstOrDefault(x => x.Columns.Count == 1);
}
}
if (fk == null)
{
return(null);
}
source = new DmlfSource
{
TableOrView = fk.RefTableFullName,
Alias = alias,
};
var relation = new DmlfRelation
{
Reference = source,
JoinType = joinType,
};
for (int i = 0; i < fk.Columns.Count; i++)
{
relation.Conditions.Add(new DmlfEqualCondition
{
LeftExpr = new DmlfColumnRefExpression
{
Column = new DmlfColumnRef
{
ColumnName = fk.Columns[0].RefColumnName,
Source = baseSource,
}
},
RightExpr = new DmlfColumnRefExpression
{
Column = new DmlfColumnRef
{
ColumnName = fk.RefColumns[0].RefColumnName,
Source = source,
}
},
});
Relations.Add(relation);
}
}
if (relationToJoin.IsEmpty)
{
return(source);
}
return(DoAddOrFindRelation(source, source.TableOrView, relationJoined / relationToJoin.First, relationToJoin.WithoutFirst, db, joinType));
}
public DmlfColumnRef GetColumnRef(DmlfSource baseSource, NameWithSchema baseTable, StructuredIdentifier columnId, DatabaseInfo db, DmlfJoinType joinType)
{
var relationId = columnId.WithoutLast;
string column = columnId.Last;
var source = AddOrFindRelation(baseSource, baseTable, relationId, db, joinType);
if (source == null)
{
return(null);
}
return(new DmlfColumnRef
{
ColumnName = column,
Source = source,
});
}
public DmlfSource AddOrFindRelation(DmlfSource baseSource, NameWithSchema baseTable, StructuredIdentifier relationId, DatabaseInfo db, DmlfJoinType joinType)
{
return(DoAddOrFindRelation(baseSource, baseTable, new StructuredIdentifier(), relationId, db, joinType));
}
