void ISqlElement.ToString(ISqlWriter writer)
{
writer.Write(Expression);
writer.Write(" ");
writer.Write(Ascending ? "ASC" : "DESC");
}
void ISqlElement.ToString(ISqlWriter writer)
{
writer.Write(Expression);
writer.Write(" ");
writer.Write(Ascending ? "ASC" : "DESC");
}
/// <summary>
/// Visits the children of the <see cref="T:System.Linq.Expressions.BinaryExpression"/>.
/// </summary>
/// <returns>
/// The modified expression, if it or any subexpression was modified; otherwise, returns the original expression.
/// </returns>
/// <param name="node">The expression to visit.</param>
protected override Expression VisitBinary(BinaryExpression node)
{
var op = node.GetOperator();
Expression left = node.Left;
Expression right = node.Right;
_serverWriter.OpenBrace();
if (left.Type.IsBoolean())
{
Visit(left);
_serverWriter.WhiteSpace();
_serverWriter.Write(op);
_serverWriter.WhiteSpace();
Visit(right);
}
else
{
VisitValue(left);
_serverWriter.WhiteSpace();
_serverWriter.Write(op);
_serverWriter.WhiteSpace();
VisitValue(right);
}
_serverWriter.CloseBrace();
return(node);
}
void ISqlElement.ToString(ISqlWriter writer)
{
writer.Write(Expression);
if (Alias != null)
{
writer.Write(" AS ");
writer.Write(Alias);
}
}
void ISqlElement.ToString(ISqlWriter writer)
{
writer.Write("SELECT ");
if (Into != null)
{
writer.Write("INTO ");
// TODO:
writer.WriteLine();
}
else
{
var colCount = Columns.Count;
int i = -1;
foreach (var column in Columns)
{
writer.Write(column);
if (++i < colCount - 1)
{
writer.Write(", ");
}
}
if (colCount > 0)
{
writer.WriteLine();
}
}
if (From != null)
{
writer.Indent(4);
writer.Write(From);
writer.WriteLine();
writer.Deindent(4);
}
if (Where != null)
{
writer.Indent(4);
writer.Write("WHERE ");
writer.Write(Where);
writer.WriteLine();
writer.Deindent(4);
}
if (Having != null)
{
writer.Indent(4);
writer.Write("HAVING ");
writer.Write(Having);
writer.WriteLine();
writer.Deindent(4);
}
}
protected override void WriteTo(ISqlWriter writer)
{
writer.Write("CASE ");
writer.Write(IfTrue);
writer.Write(" WHEN ");
writer.Write(Test);
if (IfFalse != null) {
writer.Write(" THEN ");
writer.Write(IfFalse);
}
writer.Write(" END");
}
protected override void WriteTo(ISqlWriter writer)
{
writer.Write(SelectExpression);
if (OrderBy.Count > 0)
{
writer.Write("ORDER BY ");
var orderByCount = OrderBy.Count;
var i = -1;
foreach (var column in OrderBy)
{
writer.Write(column);
if (++i < orderByCount - 1)
{
writer.Write(", ");
}
}
}
}
protected override void WriteTo(ISqlWriter writer)
{
writer.Write("CASE ");
writer.Write(IfTrue);
writer.Write(" WHEN ");
writer.Write(Test);
if (IfFalse != null)
{
writer.Write(" THEN ");
writer.Write(IfFalse);
}
writer.Write(" END");
}
void ISqlElement.ToString(ISqlWriter writer)
{
writer.Write(Expression);
}
void ISqlElement.ToString(ISqlWriter writer)
{
writer.Write(":");
writer.Write(VariableName);
}
void ISqlElement.ToString(ISqlWriter writer)
{
writer.Write(":");
writer.Write(VariableName);
}
protected override void WriteTo(ISqlWriter writer)
{
writer.Write(Value);
}
public static void WriteLine(this ISqlWriter writer)
{
writer.Write(Environment.NewLine);
}
protected override void WriteTo(ISqlWriter writer)
{
writer.Write(VariableName);
}
protected virtual void WriteTo(ISqlWriter writer)
{
writer.Write(Name);
}
protected override void WriteTo(ISqlWriter writer)
{
writer.Write(Left);
writer.Write(" {0} ", Operator.AsString());
writer.Write(Right);
}
void ISqlElement.ToString(ISqlWriter writer)
{
writer.Write(Expression);
}
void ISqlElement.ToString(ISqlWriter writer)
{
writer.Write(Expression);
if (Alias != null) {
writer.Write(" AS ");
writer.Write(Alias);
}
}
public static void Write(this ISqlWriter writer, object obj)
{
var s = obj == null ? String.Empty : obj.ToString();
writer.Write(s);
}
protected override void WriteTo(ISqlWriter writer)
{
writer.Write("(");
writer.Write(Operand);
writer.Write(")");
}
public static void Write(this ISqlWriter writer, string format, params object[] args)
{
writer.Write(String.Format(format, args));
}
protected override void WriteTo(ISqlWriter writer)
{
writer.Write("(");
writer.Write(Operand);
writer.Write(")");
}
public int Read(ImportFileOptions importTask, ISqlWriter sqlWriter)
{
Log.Debug($"ReadCsv for '{importTask.file}'");
Stopwatch _timer = new Stopwatch();
_timer.Start();
List <List <string> > batchLineFields = new List <List <string> >();
var fileInfo = new System.IO.FileInfo(importTask.file);
if (!System.IO.File.Exists(importTask.file))
{
Log.Error($"ReadCSV : '{importTask.file}' not exists!");
return(-1);
}
var firstLine = ReadFirstLine(fileInfo);
Char delimiter = string.IsNullOrWhiteSpace(importTask.delimiter) ? GuessDelimeter(firstLine) : importTask.delimiter.First <char>();
//Char quotingCharacter = '\0'; // no quoting-character;
Char quotingCharacter = string.IsNullOrWhiteSpace(importTask.quoting) ? GuessquotingCharacter(firstLine) : importTask.quoting.First <char>();
var rowCounter = 0;
try
{
using (var reader = new System.IO.StreamReader(fileInfo.FullName, Encoding.Default))
{
Char escapeCharacter = quotingCharacter;
using (var csv = new CsvReader(reader, false, delimiter, quotingCharacter, escapeCharacter, '\0', ValueTrimmingOptions.All))
{
csv.DefaultParseErrorAction = ParseErrorAction.ThrowException;
csv.SkipEmptyLines = true;
var headers = ReadHeaders(csv);
Log.Debug("Read:Headers : " + string.Join(",", headers));
sqlWriter.Init(importTask, headers);
if (!sqlWriter.EnsureFileIsUnique(fileInfo.Length))
{
Log.Debug($"Read: Import failed. The File '{importTask.file}' with size:'{fileInfo.Length}' has been allready imported.");
sqlWriter.UpdateStatusTable(-1, new TimeSpan(), fileInfo.Length);
return(-2);
}
do
{
// Read a pies of CSV
batchLineFields = ReadNextBatch(csv, importTask.batchSize);
if (batchLineFields.Count == 0)
{
break;
}
Log.Debug($"Read next batch : {batchLineFields.Count} entries start at {rowCounter} to {batchLineFields.Count + rowCounter}");
//Create & Write SQL
sqlWriter.Write(batchLineFields);
rowCounter += batchLineFields.Count;
} while (batchLineFields.Count > 0);
}
}
}
catch (Exception ex)
{
Log.Error($"ReadCsv catch exception : {ex.Message}");
return(-1);
}
_timer.Stop();
var timeSpan = TimeSpan.FromMilliseconds(_timer.ElapsedMilliseconds);
Log.Debug($"Import from '{importTask.file}' lenght:'{fileInfo.Length}' takes {_timer.ElapsedMilliseconds / 1000.0} seconds or {timeSpan.ToString("c")} of time. {rowCounter} rows inserted.");
sqlWriter.UpdateStatusTable(rowCounter, timeSpan, fileInfo.Length);
sqlWriter.ExecuteAdditionalSql();
return(rowCounter);
}
protected override void WriteTo(ISqlWriter writer)
{
writer.Write(SelectExpression);
if (OrderBy.Count > 0) {
writer.Write("ORDER BY ");
var orderByCount = OrderBy.Count;
var i = -1;
foreach (var column in OrderBy) {
writer.Write(column);
if (++i < orderByCount - 1)
writer.Write(", ");
}
}
}
protected override void WriteTo(ISqlWriter writer)
{
writer.Write(VariableName);
}
protected override void WriteTo(ISqlWriter writer)
{
writer.Write(Left);
writer.Write(" {0} ", Operator.AsString());
writer.Write(Right);
}
public static void WriteLine(this ISqlWriter writer, string s)
{
writer.Write(s);
writer.Write(Environment.NewLine);
}
void ISqlElement.ToString(ISqlWriter writer)
{
writer.Write("SELECT ");
if (Into != null) {
writer.Write("INTO ");
// TODO:
writer.WriteLine();
} else {
var colCount = Columns.Count;
int i = -1;
foreach (var column in Columns) {
writer.Write(column);
if (++i < colCount - 1)
writer.Write(", ");
}
if (colCount > 0)
writer.WriteLine();
}
if (From != null) {
writer.Indent(4);
writer.Write(From);
writer.WriteLine();
writer.Deindent(4);
}
if (Where != null) {
writer.Indent(4);
writer.Write("WHERE ");
writer.Write(Where);
writer.WriteLine();
writer.Deindent(4);
}
if (Having != null) {
writer.Indent(4);
writer.Write("HAVING ");
writer.Write(Having);
writer.WriteLine();
writer.Deindent(4);
}
}
protected override void WriteTo(ISqlWriter writer)
{
writer.Write(Value);
}
