private List <string> ParseColumnNamesFromQuery()
{
var result = SqlParser.ParseColumnNames(QB != string.Empty ? SqlForRead.Replace(QB, "").Replace(QE, "") : SqlForRead);
if (TypeInfo.IsArray && result?.Count == 0)
{
throw new ETLBoxException("Could not parse column names from Sql Query! Please pass a valid TableDefinition to the " +
" property SourceTableDefinition with at least a name for each column that you want to use in the source."
);
}
return(result);
}
public void SqlSelectStart()
{
//Arrange
List <string> expected = new List <string>()
{
};
string sql = $@"SELECT * FROM Table";
//Act
var actual = SqlParser.ParseColumnNames(sql);
//Assert
Assert.Equal(expected, actual);
}
public void SqlOneColumn()
{
//Arrange
List <string> expected = new List <string>()
{
"Col1"
};
string sql = $@"SELECT Col1";
//Act
var actual = SqlParser.ParseColumnNames(sql);
//Assert
Assert.Equal(expected, actual);
}
public void SqlSimple()
{
//Arrange
List <string> expected = new List <string>()
{
"Col1", "Col2"
};
string sql = $@"SELECT Col1, Col2 FROM Table";
//Act
var actual = SqlParser.ParseColumnNames(sql);
//Assert
Assert.Equal(expected, actual);
}
public void SqlWithSchemaOneColumn()
{
//Arrange
List <string> expected = new List <string>()
{
"Col1"
};
string sql = $@"SELECT sou.Col1 FROM table AS sou";
//Act
var actual = SqlParser.ParseColumnNames(sql);
//Assert
Assert.Equal(expected, actual);
}
public void SqlWithSeveralFunctions()
{
//Arrange
List <string> expected = new List <string>()
{
"Col1", "Col2"
};
string sql = $@"SELECT CONCAT('','Test',ISNULL(Col1,''), GETDATE()) AS Col1,
( CONVERT(INT, Col2) * 5) Col2
FROM Table";
//Act
var actual = SqlParser.ParseColumnNames(sql);
//Assert
Assert.Equal(expected, actual);
}
public void SqlWithFunction()
{
//Arrange
List <string> expected = new List <string>()
{
"Col1", "Col2"
};
string sql = $@"SELECT CASE WHEN ISNULL(Col1,'') IS NOT NULL THEN Col1 ELSE Col1 END AS Col1,
Col2
FROM Table";
//Act
var actual = SqlParser.ParseColumnNames(sql);
//Assert
Assert.Equal(expected, actual);
}