public static Statement CreateStatement(Delete delete, IEntityMapping mapping)
{
Statement statement = null;
var writer = SqlWriter.CreateWriter().Delete;
if (!delete.AllowMultiple)
{
writer.Top(1);
}
writer.From.QuotedName(delete.Table.Name);
switch (delete.Filter)
{
case Delete.FilterType.Where:
statement = WhereWriter <TEntity> .CreateStatement(delete.Where, mapping);
writer.Where.Write(statement.Text);
break;
case Delete.FilterType.Select:
var keyColumn = mapping.Key.GetColumnName();
statement = SelectWriter <TEntity> .CreateStatement(delete.Select, mapping);
writer.Where.Exists.OpenBlock.Trim().Select.QuotedName(keyColumn).From.OpenBlock.Trim().
Write(statement.Text).Trim().CloseBlock.As.SubQueryAlias.Where.SubQueryColumn(keyColumn).Equal.QuotedName(delete.Table.Name, keyColumn).Trim().CloseBlock.Flush();
break;
}
return(new Statement(writer.ToString(), Statement.StatementType.Text,
Statement.ResultType.None, statement.Parameters));
}
public static Statement CreateTableColumnsStatement(string tableName)
{
var writer = WriteSelectColumns(SqlWriter.CreateWriter()).
Where.Write(System.Columns.Aliased.ObjectId).Equal.ObjectId(tableName);
return(new Statement(writer.ToString(), Statement.StatementType.Text, Statement.ResultType.Multiple));
}
private Statement Write(Action write)
{
_sql = SqlWriter.CreateWriter();
_parameters = new Dictionary <string, object>();
write();
return(new Statement(_sql.ToString(), Statement.StatementType.Text, _parameters));
}
public static Statement CreateAddNonClusteredIndexStatement(string tableName, params Index.Column[] columns)
{
var indexName = string.Format("IX_{0}_{1}", tableName, string.Join("_", columns.Select(x => x.Name)));
var writer = SqlWriter.CreateWriter().Create.NonClustered.Index.QuotedName(indexName).On.QuotedName(tableName).OpenBlock.Trim();
var first = true;
foreach (var column in columns)
{
if (!first)
{
writer.Trim().Comma.Flush();
}
writer.QuotedName(column.Name).Do(column.Descending, x => x.Descending.Flush(), x => x.Ascending.Flush()).Flush();
first = false;
}
writer.Trim().CloseBlock.Flush();
return(new Statement(writer.ToString(), Statement.StatementType.Text, Statement.ResultType.None));
}
public static Statement CreateSharedColumnsStatement(Select select, Table target = null)
{
var sourceTables = select.GetSourceTables().Select(x => x.From.Table.Name).ToList();
if (target != null)
{
sourceTables.Add(target.Name);
}
var targetName = target != null ? target.Name : sourceTables.First();
var statement = CreateColumnsIntersectionStatement(sourceTables);
var writer = WriteSelectColumns(SqlWriter.CreateWriter(), sourceTables).
Join.OpenBlock.Trim().Write(statement.Text).Trim().CloseBlock.SubQueryAlias.On.
SubQueryColumn(System.Columns.Name).Equal.Write(System.Columns.Aliased.Name).And.
Write(System.Columns.Aliased.ObjectId).Equal.ObjectId(targetName);
return(new Statement(writer.ToString(), Statement.StatementType.Text, Statement.ResultType.Multiple));
}
public static Statement CreateTableCreateStatement(string tableName, params Column[] columns)
{
var writer = SqlWriter.CreateWriter().Create.Table.QuotedName(tableName).OpenBlock.Trim();
var first = true;
foreach (var column in columns)
{
if (!first)
{
writer.Trim().Comma.Flush();
}
WriteColumnDefinition(writer, column);
first = false;
}
var primaryKey = columns.FirstOrDefault(x => x.Key != Column.KeyType.None);
if (primaryKey != null)
{
writer.Trim().Comma.PrimaryKeyConstraint(
tableName, primaryKey.Name, primaryKey.Key == Column.KeyType.ClusteredPrimaryKey);
}
writer.Trim().CloseBlock.Flush();
return(new Statement(writer.ToString(), Statement.StatementType.Text, Statement.ResultType.None));
}
public static Statement CreateRemoveNonClusteredIndexStatement(string tableName, string indexName)
{
var writer = SqlWriter.CreateWriter().IfIndexExists(tableName, indexName).Drop.Index.QuotedName(indexName).On.QuotedName(tableName);
return(new Statement(writer.ToString(), Statement.StatementType.Text, Statement.ResultType.None));
}
public static Statement CreateRemoveColumnStatement(string tableName, string columnName)
{
var writer = SqlWriter.CreateWriter().IfColumnExists(tableName, columnName).Alter.Table.QuotedName(tableName).Drop.Column.QuotedName(columnName);
return(new Statement(writer.ToString(), Statement.StatementType.Text, Statement.ResultType.None));
}
public static Statement CreateDeleteTableStatement(string tableName)
{
var writer = SqlWriter.CreateWriter().If.TableExists(tableName).Drop.Table.QuotedName(tableName);
return(new Statement(writer.ToString(), Statement.StatementType.Text, Statement.ResultType.None));
}
public static Statement CreateProcedureExistsStatement(string name)
{
var writer = SqlWriter.CreateWriter().Select.ProcedureExistsValue(name);
return(new Statement(writer.ToString(), Statement.StatementType.Text, Statement.ResultType.Scalar));
}
