void ISqlFormattable.AppendTo(SqlStringBuilder builder)
{
if (IsEmpty)
{
return;
}
builder.Append("FROM ");
for (int i = 0; i < sources.Count; i++)
{
var source = sources[i];
JoinPart joinPart = null;
if (i > 0)
{
if (!IsNaturalJoin)
{
joinPart = joinParts[i - 1];
if (joinPart != null &&
joinPart.OnExpression != null)
{
if (joinPart.JoinType == JoinType.Inner)
{
builder.Append(" INNER JOIN ");
}
else if (joinPart.JoinType == JoinType.Right)
{
builder.Append(" RIGHT OUTER JOIN ");
}
else if (joinPart.JoinType == JoinType.Left)
{
builder.Append(" LEFT OUTER JOIN ");
}
else if (joinPart.JoinType == JoinType.Full)
{
builder.Append(" FULL OUTER JOINT ");
}
}
}
else
{
builder.Append(", ");
}
}
source.AppendTo(builder);
if (joinPart != null &&
joinPart.OnExpression != null)
{
builder.Append(" ON ");
joinPart.OnExpression.AppendTo(builder);
}
}
}
public virtual JoinPart VisitJoinPart(JoinPart part)
{
var onExpression = part.OnExpression;
if (onExpression != null)
{
onExpression = Visit(onExpression);
}
if (part.IsQuery)
{
return(new JoinPart(part.JoinType, part.Query, onExpression));
}
return(new JoinPart(part.JoinType, part.TableName, onExpression));
}
object IPreparable.Prepare(IExpressionPreparer preparer)
{
var clause = new FromClause();
// Prepare expressions in the JoiningSet first
int size = joinParts.Count;
for (int i = 0; i < size; ++i)
{
var part = joinParts[i];
var exp = part.OnExpression;
if (exp != null)
{
exp = exp.Prepare(preparer);
if (part.SubQuery != null)
{
part = new JoinPart(part.JoinType, part.SubQuery, exp);
}
else
{
part = new JoinPart(part.JoinType, part.TableName, exp);
}
}
clause.joinParts.Add(part);
}
// Prepare the StatementTree sub-queries in the from tables
for (int i = 0; i < fromTables.Count; i++)
{
var table = fromTables[i];
var preparedTable = (FromTable)((IPreparable)table).Prepare(preparer);
if (i < tableNames.Count)
{
var tableAlias = tableNames[i];
clause.tableNames.Insert(i, tableAlias);
}
clause.fromTables.Insert(i, preparedTable);
}
return(clause);
}
public void Join(JoinType joinType, SqlExpression onExpression)
{
if (sources.Count < 1)
{
throw new InvalidOperationException("Cannot join on set that has no sources.");
}
JoinPart part;
var source = sources[sources.Count - 1];
if (source.IsQuery)
{
part = new JoinPart(joinType, source.Query, onExpression);
}
else
{
part = new JoinPart(joinType, source.TableName, onExpression);
}
joinParts.Add(part);
}
object IPreparable.Prepare(IExpressionPreparer preparer)
{
var clause = new FromClause();
// Prepare expressions in the JoiningSet first
int size = joinParts.Count;
for (int i = 0; i < size; ++i) {
var part = joinParts[i];
var exp = part.OnExpression;
if (exp != null) {
exp = exp.Prepare(preparer);
if (part.SubQuery != null) {
part = new JoinPart(part.JoinType, part.SubQuery, exp);
} else {
part = new JoinPart(part.JoinType, part.TableName, exp);
}
}
clause.joinParts.Add(part);
}
// Prepare the StatementTree sub-queries in the from tables
for (int i = 0; i < fromTables.Count; i++) {
var table = fromTables[i];
var preparedTable = (FromTable) ((IPreparable) table).Prepare(preparer);
if (i < tableNames.Count) {
var tableAlias = tableNames[i];
clause.tableNames.Insert(i, tableAlias);
}
clause.fromTables.Insert(i, preparedTable);
}
return clause;
}
void ISqlFormattable.AppendTo(SqlStringBuilder builder)
{
if (IsEmpty)
{
return;
}
builder.Append("FROM ");
var tables = AllTables.ToList();
for (int i = 0; i < tables.Count; i++)
{
var source = tables[i];
JoinPart joinPart = null;
if (i > 0 && joinParts.Count > 0)
{
joinPart = GetJoinPart(i - 1);
if (joinPart != null &&
joinPart.OnExpression != null)
{
if (joinPart.JoinType == JoinType.Inner)
{
builder.Append(" INNER JOIN ");
}
else if (joinPart.JoinType == JoinType.Right)
{
builder.Append(" RIGHT OUTER JOIN ");
}
else if (joinPart.JoinType == JoinType.Left)
{
builder.Append(" LEFT OUTER JOIN ");
}
else if (joinPart.JoinType == JoinType.Full)
{
builder.Append(" FULL OUTER JOINT ");
}
}
}
if (i > 0 &&
(joinPart == null || joinPart.OnExpression == null))
{
builder.Append(", ");
}
if (source.IsSubQuery)
{
builder.Append("(");
source.SubQuery.AppendTo(builder);
builder.Append(")");
}
else
{
builder.Append(source.Name);
}
if (!String.IsNullOrEmpty(source.Alias))
{
builder.Append(" AS ");
builder.Append(source.Alias);
}
if (joinPart != null &&
joinPart.OnExpression != null)
{
builder.Append(" ON ");
joinPart.OnExpression.AppendTo(builder);
}
}
}
private void PrintFromClause(FromClause fromClause)
{
if (fromClause == null || fromClause.IsEmpty)
{
return;
}
builder.Append("FROM ");
var tables = fromClause.AllTables.ToList();
for (int i = 0; i < tables.Count; i++)
{
var source = tables[i];
JoinPart joinPart = null;
if (i > 0)
{
joinPart = fromClause.GetJoinPart(i - 1);
if (joinPart != null)
{
if (joinPart.JoinType == JoinType.Inner)
{
builder.Append(" INNER JOIN ");
}
else if (joinPart.JoinType == JoinType.Right)
{
builder.Append(" RIGHT OUTER JOIN ");
}
else if (joinPart.JoinType == JoinType.Left)
{
builder.Append(" LEFT OUTER JOIN ");
}
else if (joinPart.JoinType == JoinType.Full)
{
builder.Append(" FULL OUTER JOINT ");
}
}
}
if (source.IsSubQuery)
{
builder.Append("(");
Visit(source.SubQuery);
builder.Append(")");
}
else
{
builder.Append(source.Name);
}
if (!String.IsNullOrEmpty(source.Alias))
{
builder.Append(" AS ");
builder.Append(source.Alias);
}
if (i < tables.Count - 1)
{
if (joinPart == null)
{
builder.Append(", ");
}
else
{
builder.Append(" ON ");
Visit(joinPart.OnExpression);
}
}
}
}
