private Ast.ImportXlsStmt ParseImportXlsStmt(TokenQueue q) // or null
{
var stmt = new Ast.ImportXlsStmt {
SourceToken = q.SourceToken
};
var start = q.GetLocation();
if (!q.TakeMaybe("import"))
{
q.Jump(start); return(null);
}
if (!q.TakeMaybe("xls", "xlsx"))
{
q.Jump(start); return(null);
}
stmt.FilenameExpr = ParseExpr(q);
if (q.TakeMaybe("worksheet"))
{
stmt.WhichSheetExpr = ParseExpr(q);
}
q.Take("into");
stmt.ImportTable = Check(q, ParseImportTable(q));
if (q.TakeMaybe("options"))
{
stmt.OptionsList = Check(q, ParseOptionsList(q));
}
ConsumeSemicolon(q);
return(stmt);
}
private void ExecuteImportXlsStmt(Ast.ImportXlsStmt stmt, ScriptEnv env)
{
try {
ImportXlsStmtRunner.Run(_notebook, env, this, stmt);
} catch (Exception ex) {
Throw(env, -1, ex.Message, -1);
}
}
private ImportXlsStmtRunner(INotebook notebook, ScriptEnv env, ScriptRunner runner, Ast.ImportXlsStmt stmt)
{
_notebook = notebook;
_env = env;
_runner = runner;
_stmt = stmt;
_filePath = _runner.EvaluateExpr <string>(_stmt.FilenameExpr, _env);
if (!File.Exists(_filePath))
{
throw new Exception($"The specified XLS/XLSX file was not found: \"{_filePath}\"");
}
if (_stmt.WhichSheetExpr != null)
{
_whichSheet = _runner.EvaluateExpr(_stmt.WhichSheetExpr, _env);
}
int?index;
foreach (var option in _stmt.OptionsList.GetOptionKeys())
{
switch (option)
{
case "FIRST_ROW":
_firstRowIndex = _stmt.OptionsList.GetOptionInt(option, _runner, _env, 1, minValue: 1) - 1;
break;
case "LAST_ROW":
var lastRowNum = _stmt.OptionsList.GetOptionInt(option, _runner, _env, 0, minValue: 0);
if (lastRowNum == 0)
{
_lastRowIndex = null;
}
else
{
_lastRowIndex = lastRowNum - 1;
}
break;
case "FIRST_COLUMN":
index = XlsUtil.ColumnRefToIndex(_stmt.OptionsList.GetOption <object>(option, _runner, _env, null));
if (index.HasValue)
{
_firstColumnIndex = index.Value;
}
else
{
throw new Exception($"The {option} option must be a valid column number or string.");
}
break;
case "LAST_COLUMN":
var lastColumnValue = _stmt.OptionsList.GetOption <object>(option, _runner, _env, null);
if (lastColumnValue.Equals(0))
{
_lastColumnIndex = null;
break;
}
index = XlsUtil.ColumnRefToIndex(lastColumnValue);
if (index.HasValue)
{
_lastColumnIndex = index.Value;
}
else
{
throw new Exception($"The {option} option must be a valid column number or string.");
}
break;
case "HEADER_ROW":
_headerRow = _stmt.OptionsList.GetOptionBool(option, _runner, _env, true);
break;
case "TRUNCATE_EXISTING_TABLE":
_truncateExistingTable = _stmt.OptionsList.GetOptionBool(option, _runner, _env, false);
break;
case "TEMPORARY_TABLE":
_temporaryTable = _stmt.OptionsList.GetOptionBool(option, _runner, _env, false);
break;
case "IF_CONVERSION_FAILS":
_ifConversionFails = (IfConversionFails)_stmt.OptionsList.GetOptionLong(
option, _runner, _env, 1, minValue: 1, maxValue: 3);
break;
default:
throw new Exception($"\"{option}\" is not a recognized option name.");
}
}
}
// must be run from the SQLite thread
public static void Run(INotebook notebook, ScriptEnv env, ScriptRunner runner, Ast.ImportXlsStmt stmt)
{
var importer = new ImportXlsStmtRunner(notebook, env, runner, stmt);
SqlUtil.WithTransaction(notebook, importer.Import);
}