private IEnumerator<string> Compile(SQLContext LanguageContext)
{
yield return "UPDATE ";
var From = Table.SourceDefinion.Compile(LanguageContext);
while (From.MoveNext()) yield return From.Current;
yield return " SET ";
bool first = true;
foreach (var setter in SetClause)
{
if (!first) yield return ", ";
else first = false;
var field = setter.Item1.ColumnDefinion.Compile(LanguageContext);
while (field.MoveNext()) yield return field.Current;
yield return " = ";
var value = setter.Item2;
foreach (var s in value) yield return s;
}
yield return " WHERE ";
yield return where;
}
/// <summary>
/// Gets a text representation of the identifier for a given SQL flavor
/// </summary>
public string Escape(SQLContext LanguageContext)
{
string cached = null;
if (!CachedNames.TryGetValue(LanguageContext, out cached))
CachedNames[LanguageContext] = cached = string.Concat(LanguageContext.LeftEscapingSymbol, Identifier, LanguageContext.RightEscapingSymbol);
return cached;
}
private IEnumerator<string> Compile(SQLContext LanguageContext)
{
yield return "VALUES ";
bool firstrow = true;
foreach (var row in data)
{
#if DEBUG
yield return "\r\n ";
#endif
if (!firstrow) yield return ", ";
else firstrow = false;
yield return "(";
bool firstcell = true;
foreach (var cell in row)
{
if (!firstcell) yield return ", ";
else firstcell = false;
var cellbuilder = cell.ColumnDefinion.Compile(LanguageContext);
while (cellbuilder.MoveNext()) yield return cellbuilder.Current;
}
yield return ")";
}
}
private IEnumerator<string> Compile(SQLContext LanguageContext)
{
yield return "INSERT INTO ";
var into = Into.SourceDefinion.Compile(LanguageContext);
while (into.MoveNext()) yield return into.Current;
yield return " (";
for (int i = 0; i < fields.Length; i++)
{
var field = fields[i].NamedColumnDefinion.Compile(LanguageContext);
while (field.MoveNext()) yield return field.Current;
if (i < fields.Length - 1) yield return ", ";
}
yield return ") ";
#if DEBUG
yield return "\r\n";
#endif
if (Output != null)
{
var clause = LanguageContext.InsertReturningClause_at_Values(Output);
while (clause.MoveNext()) yield return clause.Current;
}
var what = SourceData.InsertSourceDefinion.Compile(LanguageContext);
while (what.MoveNext()) yield return what.Current;
if (Output != null)
{
var clause = LanguageContext.InsertReturningClause_at_End(Output);
while (clause.MoveNext()) yield return clause.Current;
}
}
private IEnumerator<string> Compile(SQLContext LanguageContext)
{
yield return "CAST (";
var arg = Argument.ColumnDefinion.Compile(LanguageContext);
while (arg.MoveNext()) yield return arg.Current;
yield return " AS ";
yield return LanguageContext.GetTypeName(TargetType);
yield return ")";
}
/// <summary> Builds SQL text in the given context </summary>
/// <param name="LanguageContext"> TSQL, PostgreSQL or other available options </param>
public string Build(SQLContext LanguageContext)
{
var builder = new StringBuilder();
var enumerator = getter(LanguageContext);
while (enumerator.MoveNext())
builder.Append(enumerator.Current);
return builder.ToString();
}
private IEnumerator<string> Compile(SQLContext LanguageContext)
{
yield return "DELETE FROM ";
var From = Table.SourceDefinion.Compile(LanguageContext);
while (From.MoveNext()) yield return From.Current;
yield return " WHERE ";
yield return where;
}
private IEnumerator<string> Compile(SQLContext LanguageContext)
{
yield return "(";
var subquery = baseColumn.ColumnDefinion.Compile(LanguageContext);
while (subquery.MoveNext()) yield return subquery.Current;
yield return ") AS ";
var name = AS.ColumnDefinion.Compile(LanguageContext);
while (name.MoveNext()) yield return name.Current;
}
private IEnumerator<string> Compile(SQLContext LanguageContext)
{
yield return LanguageContext.GetFunctionName(Function);
yield return "( ";
for (int i = 0; i < Arguments.Length; i++)
{
var arg = Arguments[i].ColumnDefinion.Compile(LanguageContext);
while (arg.MoveNext()) yield return arg.Current;
if (i < Arguments.Length - 1) yield return ", ";
}
yield return " )";
}
/// <summary>
/// Gets a text representation of the identifier for a given SQL flavor
/// </summary>
public string Escape(SQLContext LanguageContext)
{
string cached = null;
if (!CachedNames.TryGetValue(LanguageContext, out cached))
{
var builder = new StringBuilder();
if (!string.IsNullOrEmpty(Schema))
{
builder.Append(LanguageContext.LeftEscapingSymbol);
builder.Append(Schema);
builder.Append(LanguageContext.RightEscapingSymbol);
builder.Append(".");
}
builder.Append(LanguageContext.LeftEscapingSymbol);
builder.Append(Identifier);
builder.Append(LanguageContext.RightEscapingSymbol);
CachedNames[LanguageContext] = cached = builder.ToString();
}
return cached;
}
internal IEnumerator<string> Compile(SQLContext LanguageContext) => getter(LanguageContext);
private IEnumerator<string> Compile(SQLContext LanguageContext)
{
yield return Escape(LanguageContext);
}
/// <summary> /// Gets a text representation of the identifier for a given SQL flavor /// </summary> public string Escape(SQLContext LanguageContext) => "*";
private IEnumerator<string> Compile(SQLContext LanguageContext)
{
var literal = LanguageContext.EscapeLiteral(Value);
while (literal.MoveNext()) yield return literal.Current;
}
private IEnumerator<string> Compile(SQLContext LanguageContext)
{
yield return "SELECT ";
if (top.HasValue)
{
yield return "TOP ";
yield return top.ToString();
yield return " ";
}
#if DEBUG
if (fields.Length > 1) yield return "\r\n ";
#endif
for (int i = 0; i < fields.Length; i++)
{
var field = fields[i].NamedColumnDefinion.Compile(LanguageContext);
while (field.MoveNext()) yield return field.Current;
if (i < fields.Length - 1) yield return ", ";
}
#if DEBUG
yield return "\r\n";
#endif
yield return " FROM ";
#if DEBUG
yield return "\r\n ";
#endif
var From = source.SourceDefinion.Compile(LanguageContext);
while (From.MoveNext())
{
var current = From.Current;
#if DEBUG
current = current.Replace("\r\n", "\r\n ");
#endif
yield return current;
}
if (where?.Length > 0)
{
#if DEBUG
yield return "\r\n";
#endif
yield return " WHERE ";
#if DEBUG
yield return "\r\n ";
#endif
bool brackets = where.Length > 1;
for (int i = 0; i < where.Length; i++)
{
if (brackets) yield return "(";
yield return where[i];
if (brackets) yield return ")";
if (i < where.Length - 1) yield return " AND ";
}
}
}
