public List<string> GenerateCreateIndexStatement(CreateIndex statement)
{
StringBuilder columnList = new StringBuilder();
foreach (CreateIndex.Column col in statement.Columns)
{
if (columnList.Length > 0)
columnList.Append(", ");
columnList.Append(col.Name);
if (col.MaxLength > 0)
{
columnList.AppendFormat("({0})", col.MaxLength);
}
}
/*
CREATE INDEX idx_greylisting_triplets ON hm_greylisting_triplets (glipaddress, glsenderaddress, glrecipientaddress);
*/
StringBuilder sb = new StringBuilder();
sb.AppendFormat("CREATE {0} INDEX {1} ON {2} ({3})",
statement.Unique ? "UNIQUE" : "",
statement.Name,
statement.Table,
columnList.ToString());
return new List<string>() { sb.ToString() };
}
public List<string> GenerateCreateIndexStatement(CreateIndex statement)
{
StringBuilder columnList = new StringBuilder();
foreach (CreateIndex.Column col in statement.Columns)
{
if (columnList.Length > 0)
columnList.Append(", ");
columnList.Append(col.Name);
}
/*
ALTER TABLE hm_accounts ADD CONSTRAINT test1 UNIQUE NONCLUSTERED (accountid)
Clustered indexes are not supported in SQL CE.
*/
StringBuilder sb = new StringBuilder();
sb.AppendFormat("CREATE {0} NONCLUSTERED INDEX {1} ON {2} ({3})",
statement.Unique ? "UNIQUE" : "",
statement.Name,
statement.Table,
columnList.ToString());
return new List<string>() { sb.ToString() };
}
private IStatement ParseCreateIndexStatement(XmlNode statement)
{
CreateIndex createIndexStatement = new CreateIndex();
createIndexStatement.Name = statement.Attributes["Name"].Value;
createIndexStatement.Table = statement.Attributes["Table"].Value;
createIndexStatement.Unique = Convert.ToBoolean(statement.Attributes["Unique"].Value);
createIndexStatement.Clustered = Convert.ToBoolean(statement.Attributes["Clustered"].Value);
foreach (XmlNode childNode in statement.ChildNodes)
{
if (!(statement is System.Xml.XmlElement))
continue;
CreateIndex.Column col = new CreateIndex.Column();
col.Name = childNode.Attributes["Name"].Value;
XmlAttribute attribute = childNode.Attributes["MaxLength"];
if (attribute != null)
col.MaxLength = Convert.ToInt32(attribute.Value.Length);
createIndexStatement.Columns.Add(col);
}
return createIndexStatement;
}
