protected void VisitWhenNotMatchedThenInsertToken(MergeStatement statement
, IList <string> tempUpdateAliases
, string targetAlias
, string targetColumnOn
, string targetTable
, string sourceAlias
, string sourceTable
, string sourceColumnOn)
{
ExpressionToken tempExpression = new ExpressionToken();
if (statement.WhenNotMatched.Count != 0)
{
int counter = 0;
foreach (WhenMatchedToken item in statement.WhenNotMatched)
{
IList <CTEDefinition> tmpSourceList = new List <CTEDefinition>();
tempExpression = Sql.Name(sourceAlias, sourceColumnOn)
.NotIn(Sql.Select.Output(targetColumnOn).From(targetTable));
if (item.AndCondition != null)
{
if (item.AndCondition is BinaryToken)
{
((BinaryToken)item.AndCondition).First = Sql.Name(sourceAlias, ((Name)((BinaryToken)item.AndCondition).First).LastPart);
}
else if (item.AndCondition is UnaryToken)
{
((UnaryToken)item.AndCondition).Token = Sql.Name(sourceAlias, ((Name)((UnaryToken)item.AndCondition).Token).LastPart);
}
tempExpression = tempExpression.And((ExpressionToken)item.AndCondition);
}
CTEDefinition source = Sql.With(sourceAlias).As(
Sql.Select.From(Sql.NameAs(sourceTable, sourceAlias)).Where(tempExpression));
tmpSourceList.Add(source);
InsertStatement insertStatement = Sql.Insert.Into(targetTable);
if ((((WhenNotMatchedTokenThenInsertToken)item).Values.Count == 0) ||
(((WhenNotMatchedTokenThenInsertToken)item).Columns.Count == 0) ||
(((WhenNotMatchedTokenThenInsertToken)item).Columns.Count != ((WhenNotMatchedTokenThenInsertToken)item).Values.Count))
{
insertStatement.Columns.Add(targetColumnOn);
insertStatement.From(Sql.Select.From(sourceAlias).Output(sourceColumnOn));
}
else
{
foreach (Name columnName in ((WhenNotMatchedTokenThenInsertToken)item).Columns)
{
insertStatement.Columns.Add(Sql.Name(columnName.LastPart));
}
SelectStatement fromSelect = Sql.Select.From(sourceAlias);
foreach (Token outputColumn in ((WhenNotMatchedTokenThenInsertToken)item).Values)
{
fromSelect.Output.Add(Sql.Name(((Name)outputColumn).LastPart));
}
insertStatement.From(fromSelect);
}
VisitCommonTableExpressions(tmpSourceList);
VisitStatement(insertStatement);
State.WriteStatementTerminator();
InsertStatement whenNotMatchedInsert =
Sql.Insert.Into(Sql.Name(targetTable))
.From(Sql.Select.From(Sql.Name(sourceAlias))
.Where(tempExpression));
counter++;
}
}
}
protected void VisitWhenNotMatchedThenInsertToken(MergeStatement statement
, IList <string> tempUpdateAliases
, string targetAlias
, string targetColumnOn
, string targetTable
, string sourceAlias
, string sourceTable
, string sourceColumnOn)
{
string tempSourceAlias = "tmp_" + sourceAlias;
ExpressionToken tempExpression = new ExpressionToken();
if (statement.WhenNotMatched.Count != 0)
{
int counter = 0;
foreach (WhenMatchedToken item in statement.WhenNotMatched)
{
tempExpression = Sql.Name(sourceAlias, sourceColumnOn)
.NotIn(Sql.Select.Output(targetColumnOn).From(targetTable));
if (item.AndCondition != null)
{
tempExpression = tempExpression.And(AddPrefixToExpressionToken((ExpressionToken)item.AndCondition, sourceAlias));
}
CreateTableStatement createTempTable =
Sql.CreateTemporaryTable(tempSourceAlias)
.As(Sql.Select.From(Sql.NameAs(sourceTable, sourceAlias)).Where(tempExpression));
VisitStatement(createTempTable);
State.WriteStatementTerminator();
InsertStatement insertStatement = Sql.Insert.Into(targetTable);
if ((((WhenNotMatchedTokenThenInsertToken)item).Values.Count == 0) ||
(((WhenNotMatchedTokenThenInsertToken)item).Columns.Count == 0) ||
(((WhenNotMatchedTokenThenInsertToken)item).Columns.Count != ((WhenNotMatchedTokenThenInsertToken)item).Values.Count))
{
insertStatement.Columns.Add(targetColumnOn);
insertStatement.From(Sql.Select.From(tempSourceAlias).Output(sourceColumnOn));
}
else
{
foreach (Name columnName in ((WhenNotMatchedTokenThenInsertToken)item).Columns)
{
insertStatement.Columns.Add(Sql.Name(columnName.LastPart));
}
SelectStatement fromSelect = Sql.Select.From(tempSourceAlias);
foreach (Token outputColumn in ((WhenNotMatchedTokenThenInsertToken)item).Values)
{
fromSelect.Output.Add(Sql.Name(((Name)outputColumn).LastPart));
}
insertStatement.From(fromSelect);
}
VisitStatement(insertStatement);
State.WriteStatementTerminator();
counter++;
VisitStatement(Sql.DropTable(tempSourceAlias, true));
State.WriteStatementTerminator();
}
}
}
