/// <summary>
/// Adds a touched value block.
/// </summary>
/// <returns></returns>
protected TouchedValueCollection AddTouchedValueBlock()
{
TouchedValueCollection block = new TouchedValueCollection();
this.TouchedValueBlocks.Add(block);
// return...
return(block);
}
/// <summary>
/// Adds a set of TouchedValue instances to the collection.
/// </summary>
/// <param name="item">The item to add.</param>
public void AddRange(TouchedValueCollection items)
{
if (items == null)
{
throw new ArgumentNullException("items");
}
for (int index = 0; index < items.Count; index++)
{
Add(items[index]);
}
}
/// <summary>
/// Appends the insert portion to the query.
/// </summary>
/// <param name="statement"></param>
/// <param name="builder"></param>
private void AppendInsertPortion(SqlStatement statement, StringBuilder builder)
{
if (statement == null)
{
throw new ArgumentNullException("statement");
}
if (builder == null)
{
throw new ArgumentNullException("builder");
}
// create a block...
TouchedValueCollection block = this.AddTouchedValueBlock();
EntityField[] autoIncrementFields = GetAutoIncrementFields();
if (autoIncrementFields.Length > 0 && statement.Dialect.LastInsertedIdMode == LastInsertedIdMode.Parameter)
{
statement.Parameters.Add(statement.Dialect.GetLastInsertedIdParameter());
}
// append...
builder.Append(statement.Dialect.InsertIntoKeyword);
builder.Append(" ");
builder.Append(statement.Dialect.FormatNativeName(this.EntityType.NativeName));
builder.Append(" (");
EntityField[] fields = this.GetNonAutoIncrementFields();
for (int index = 0; index < fields.Length; index++)
{
if (index > 0)
{
builder.Append(statement.Dialect.IdentifierSeparator);
}
builder.Append(statement.Dialect.FormatNativeName(fields[index].NativeName));
}
builder.Append(") ");
builder.Append(statement.Dialect.ValuesKeyword);
builder.Append(" (");
for (int index = 0; index < fields.Length; index++)
{
// create the param...
SqlStatementParameter param = this.CreateParameterForField(fields[index]);
statement.Parameters.Add(param);
param.RelatedField = fields[index];
// add...
if (index > 0)
{
builder.Append(statement.Dialect.IdentifierSeparator);
}
builder.Append(statement.Dialect.FormatVariableNameForQueryText(param.Name));
// mbr - 2007-04-02 - touched value...
block.Add(new TouchedValue(fields[index], param.Value));
}
builder.Append(")");
if (autoIncrementFields.Length > 0 && statement.Dialect.LastInsertedIdMode == LastInsertedIdMode.Parameter)
{
builder.Append(statement.Dialect.AppendLastInsertedIdParameterAccess(GetAutoIncrementFields()));
}
builder.Append(statement.Dialect.StatementSeparator);
}
/// <summary>
/// Creates an Delete statement.
/// </summary>
/// <returns></returns>
public override SqlStatement[] GetStatements(WorkUnitProcessingContext context)
{
// check...
if (EntityType == null)
{
throw new ArgumentNullException("EntityType");
}
if (Dialect == null)
{
throw new InvalidOperationException("Dialect is null.");
}
// mbr - 25-04-2007 - added touched...
TouchedValueCollection block = this.AddTouchedValueBlock();
if (block == null)
{
throw new InvalidOperationException("block is null.");
}
// create...
SqlStatement statement = new SqlStatement(this.EntityType, this.Dialect);
statement.OriginalWorkUnit = this;
// sql...
StringBuilder builder = new StringBuilder();
builder.Append(statement.Dialect.UpdateKeyword);
builder.Append(" ");
builder.Append(statement.Dialect.FormatNativeName(this.EntityType.NativeName));
builder.Append(" ");
builder.Append(statement.Dialect.SetKeyword);
builder.Append(" ");
// do the non-key fields...
EntityField[] fields = this.GetNonAutoIncrementFields();
if (fields.Length == 0)
{
throw new InvalidOperationException("Non-key fields are zero length.");
}
// walk...
int fieldCount = 0;
for (int index = 0; index < fields.Length; index++)
{
// create a parameter...
SqlStatementParameter parameter = this.CreateParameterForField(fields[index]);
statement.Parameters.Add(parameter);
parameter.RelatedField = fields[index];
// mbr - 25-04-2007 - added touched...
object originalValue = null;
if (this.Entity is Entity && ((Entity)this.Entity).GetOriginalValue(fields[index], ref originalValue))
{
block.Add(new TouchedValue(fields[index], originalValue, parameter.Value));
}
// add...
if (fieldCount > 0)
{
builder.Append(",");
}
builder.Append(statement.Dialect.FormatNativeName(fields[index].NativeName));
builder.Append("=");
builder.Append(statement.Dialect.FormatVariableNameForQueryText(parameter.Name));
fieldCount++;
}
// where...
builder.Append(" ");
builder.Append(statement.Dialect.WhereKeyword);
builder.Append(" ");
// key...
fields = this.GetKeyFields();
if (fields.Length == 0)
{
throw new InvalidOperationException("Key fields are zero length.");
}
// walk...
StringBuilder constraints = new StringBuilder();
for (int index = 0; index < fields.Length; index++)
{
// param...
SqlStatementParameter parameter = this.CreateParameterForField(fields[index]);
statement.Parameters.Add(parameter);
parameter.RelatedField = fields[index];
// add...
if (index > 0)
{
constraints.Append(" ");
constraints.Append(statement.Dialect.AndKeyword);
constraints.Append(" ");
}
constraints.Append(statement.Dialect.FormatNativeName(fields[index].NativeName));
constraints.Append("=");
constraints.Append(statement.Dialect.FormatVariableNameForQueryText(parameter.Name));
}
// mbr - 13-10-2005 - rejigged to handle partitioning...
string useConstraints = constraints.ToString();
//if(this.EntityType.SupportsPartitioning)
//{
// // get the strategy....
// PartitioningStrategy strategy = this.EntityType.PartitioningStrategy;
// if(strategy == null)
// throw new InvalidOperationException("strategy is null.");
// // mbr - 04-09-2007 - for c7 - need to be able to skip the the constraint check...
// if(strategy.ConstrainUpdateQuery)
// {
// // get the partition SQL... (yes, this is for read, not for write. for write really means 'for insert'.)
// // mbr - 04-09-2007 - for c7 - removed 'forReading'.
// // useConstraints = strategy.RebuildConstraints(statement, useConstraints, true);
// useConstraints = strategy.RebuildConstraints(statement, useConstraints);
// // we have to get something back...
// if(useConstraints == null)
// throw new InvalidOperationException("'useConstraints' is null.");
// // mbr - 04-09-2007 - for c7 - zero-length can be ok.
// if(useConstraints.Length == 0 && !(strategy.IsZeroLengthIdSetOk))
// throw new InvalidOperationException("'useConstraints' is zero-length.");
// }
//}
// append...
builder.Append(useConstraints);
// return...
statement.CommandText = builder.ToString();
return(new SqlStatement[] { statement });
}