public void SelectClause_Comments()
{
using (StringReader reader = new StringReader(
@"select top 1
oh.TaxAmt / oh.SubTotal /* tax percent */
from
Sales.SalesOrderHeader oh;" ))
using (ITSQLTokenizer tokenizer = new TSQLTokenizer(reader))
{
Assert.IsTrue(tokenizer.MoveNext());
TSQLSelectClause select = new TSQLSelectClauseParser().Parse(tokenizer);
Assert.AreEqual(11, select.Tokens.Count);
Assert.AreEqual(TSQLKeywords.FROM, tokenizer.Current.AsKeyword.Keyword);
Assert.AreEqual(1, select.Columns.Count);
Assert.IsNull(select.Columns[0].ColumnAlias);
Assert.AreEqual(TSQLExpressionType.Operator, select.Columns[0].Expression.Type);
TSQLOperatorExpression operatorExpression = select.Columns[0].Expression.AsOperator;
Assert.AreEqual("/", operatorExpression.Operator.Text);
Assert.AreEqual(TSQLExpressionType.Column, operatorExpression.LeftSide.Type);
TSQLColumnExpression leftSide = operatorExpression.LeftSide.AsColumn;
Assert.AreEqual("oh", leftSide.TableReference.Single().AsIdentifier.Name);
Assert.AreEqual("TaxAmt", leftSide.Column.Name);
Assert.AreEqual(TSQLExpressionType.Column, operatorExpression.RightSide.Type);
TSQLColumnExpression rightSide = operatorExpression.RightSide.AsColumn;
Assert.AreEqual("oh", rightSide.TableReference.Single().AsIdentifier.Name);
Assert.AreEqual("SubTotal", rightSide.Column.Name);
Assert.AreEqual(" tax percent ", select.Columns.Last().Tokens.Last().AsMultilineComment.Comment);
}
}
public void SelectClause_UnaryOperator()
{
using (StringReader reader = new StringReader(
@"SELECT
+1;" ))
using (ITSQLTokenizer tokenizer = new TSQLTokenizer(reader))
{
Assert.IsTrue(tokenizer.MoveNext());
TSQLSelectClause select = new TSQLSelectClauseParser().Parse(tokenizer);
Assert.AreEqual(3, select.Tokens.Count);
Assert.IsTrue(tokenizer.Current.IsCharacter(TSQLCharacters.Semicolon));
Assert.AreEqual(1, select.Columns.Count);
TSQLSelectColumn column = select.Columns[0];
Assert.IsNull(column.ColumnAlias);
Assert.AreEqual(TSQLExpressionType.Operator, column.Expression.Type);
TSQLOperatorExpression tsqlOperator = column.Expression.AsOperator;
Assert.AreEqual("+", tsqlOperator.Operator.Text);
Assert.IsNull(tsqlOperator.LeftSide);
Assert.AreEqual(TSQLExpressionType.Constant, tsqlOperator.RightSide.Type);
Assert.AreEqual(1, tsqlOperator.RightSide.AsConstant.Literal.AsNumericLiteral.Value);
}
}
public void SelectClause_VariableAssignment()
{
using (StringReader reader = new StringReader(
@"SELECT @id = p.ProductID
FROM Production.Product p
WHERE
p.[Name] = 'Blade';" ))
using (ITSQLTokenizer tokenizer = new TSQLTokenizer(reader))
{
Assert.IsTrue(tokenizer.MoveNext());
TSQLSelectClause select = new TSQLSelectClauseParser().Parse(tokenizer);
Assert.AreEqual(6, select.Tokens.Count);
Assert.AreEqual(TSQLKeywords.FROM, tokenizer.Current.AsKeyword.Keyword);
Assert.AreEqual(1, select.Columns.Count);
TSQLSelectColumn column = select.Columns[0];
Assert.IsNull(column.ColumnAlias);
Assert.AreEqual(TSQLExpressionType.VariableAssignment, column.Expression.Type);
TSQLVariableAssignmentExpression assignmentExpression = column.Expression.AsVariableAssignment;
Assert.AreEqual("=", assignmentExpression.Operator.Text);
Assert.AreEqual("@id", assignmentExpression.Variable.Text);
TSQLColumnExpression columnExpression = assignmentExpression.ValueExpression.AsColumn;
Assert.AreEqual("p", columnExpression.TableReference.Single().AsIdentifier.Name);
Assert.AreEqual("ProductID", columnExpression.Column.Name);
}
}
public void SelectClause_FullyQualifiedFunction()
{
using (StringReader reader = new StringReader(
@"SELECT
p.ProductID,
p.[Name],
Test.dbo.Multiply(p.SafetyStockLevel, p.StandardCost) AS RestockCost
FROM
Production.Product p
ORDER BY
p.[Name];" ))
using (ITSQLTokenizer tokenizer = new TSQLTokenizer(reader))
{
Assert.IsTrue(tokenizer.MoveNext());
TSQLSelectClause select = new TSQLSelectClauseParser().Parse(tokenizer);
Assert.AreEqual(25, select.Tokens.Count);
Assert.AreEqual(TSQLKeywords.FROM, tokenizer.Current.AsKeyword.Keyword);
Assert.AreEqual(3, select.Columns.Count);
TSQLSelectColumn column = select.Columns[0];
Assert.IsNull(column.ColumnAlias);
Assert.AreEqual(TSQLExpressionType.Column, column.Expression.Type);
Assert.AreEqual("p", column.Expression.AsColumn.TableReference.Single().AsIdentifier.Name);
Assert.AreEqual("ProductID", column.Expression.AsColumn.Column.Name);
column = select.Columns[1];
Assert.IsNull(column.ColumnAlias);
Assert.AreEqual(TSQLExpressionType.Column, column.Expression.Type);
Assert.AreEqual("p", column.Expression.AsColumn.TableReference.Single().AsIdentifier.Name);
Assert.AreEqual("Name", column.Expression.AsColumn.Column.Name);
column = select.Columns[2];
Assert.AreEqual("RestockCost", column.ColumnAlias.Name);
Assert.AreEqual(TSQLExpressionType.Function, column.Expression.Type);
TSQLFunctionExpression functionExpression = column.Expression.AsFunction;
Assert.AreEqual("Multiply", functionExpression.Function.Name);
Assert.AreEqual(3, functionExpression.QualifiedPath.Count);
Assert.AreEqual("Test", functionExpression.QualifiedPath[0].AsIdentifier.Name);
Assert.AreEqual(".", functionExpression.QualifiedPath[1].AsCharacter.Text);
Assert.AreEqual("dbo", functionExpression.QualifiedPath[2].AsIdentifier.Name);
TSQLColumnExpression argumentExpression = functionExpression.Arguments[0].AsColumn;
Assert.AreEqual("p", argumentExpression.TableReference.Single().AsIdentifier.Name);
Assert.AreEqual("SafetyStockLevel", argumentExpression.Column.Name);
argumentExpression = functionExpression.Arguments[1].AsColumn;
Assert.AreEqual("p", argumentExpression.TableReference.Single().AsIdentifier.Name);
Assert.AreEqual("StandardCost", argumentExpression.Column.Name);
}
}
public static FindCreateStatementResult FindCreate(string body)
{
var tokenizer = new TSQLTokenizer(body);
tokenizer.MoveNext();
while (tokenizer.Current != null && tokenizer.Current.AsKeyword?.Keyword != TSQLKeywords.CREATE)
{
tokenizer.MoveNext();
}
if (tokenizer.Current == null)
{
// Oops, we reached the end of the file and did not find the CREATE!
return(null);
}
var createToken = tokenizer.Current.AsKeyword;
tokenizer.MoveNext();
var typeKeyword = tokenizer.Current.AsKeyword;
tokenizer.MoveNext();
// the object owner is optional
var token0 = tokenizer.Current;
tokenizer.MoveNext();
var token1 = tokenizer.Current;
tokenizer.MoveNext();
var token2 = tokenizer.Current;
tokenizer.MoveNext();
TSQLIdentifier entityNameToken;
if (token1.AsCharacter?.Text == ".")
{
entityNameToken = token2.AsIdentifier;
}
else
{
entityNameToken = token0.AsIdentifier;
}
return(new FindCreateStatementResult
{
CreateBeginPosition = createToken.BeginPosition,
TypeEndPosition = typeKeyword.EndPosition,
NameEndPosition = entityNameToken.EndPosition
});
}
public void SelectClause_Comments()
{
using (StringReader reader = new StringReader(
@"select top 1
oh.TaxAmt / oh.SubTotal /* tax percent */
from
Sales.SalesOrderHeader oh;" ))
using (ITSQLTokenizer tokenizer = new TSQLTokenizer(reader))
{
Assert.IsTrue(tokenizer.MoveNext());
TSQLSelectClause select = new TSQLSelectClauseParser().Parse(tokenizer);
Assert.AreEqual(11, select.Tokens.Count);
Assert.AreEqual(TSQLKeywords.FROM, tokenizer.Current.AsKeyword.Keyword);
}
}
public void SelectClause_WindowedAggregate()
{
using (StringReader reader = new StringReader(
@"SELECT
p.ProductID,
p.[Name],
ROW_NUMBER() OVER (
PARTITION BY
p.DaysToManufacture
ORDER BY
p.[Name]) AS GroupNumber
FROM
Production.Product p
ORDER BY
p.DaysToManufacture,
p.[Name];" ))
using (ITSQLTokenizer tokenizer = new TSQLTokenizer(reader))
{
Assert.IsTrue(tokenizer.MoveNext());
TSQLSelectClause select = new TSQLSelectClauseParser().Parse(tokenizer);
Assert.AreEqual(27, select.Tokens.Count);
Assert.AreEqual(TSQLKeywords.FROM, tokenizer.Current.AsKeyword.Keyword);
Assert.AreEqual(3, select.Columns.Count);
TSQLSelectColumn column = select.Columns[0];
Assert.IsNull(column.ColumnAlias);
Assert.AreEqual(TSQLExpressionType.Column, column.Expression.Type);
Assert.AreEqual("p", column.Expression.AsColumn.TableReference.Single().AsIdentifier.Name);
Assert.AreEqual("ProductID", column.Expression.AsColumn.Column.Name);
column = select.Columns[1];
Assert.IsNull(column.ColumnAlias);
Assert.AreEqual(TSQLExpressionType.Column, column.Expression.Type);
Assert.AreEqual("p", column.Expression.AsColumn.TableReference.Single().AsIdentifier.Name);
Assert.AreEqual("Name", column.Expression.AsColumn.Column.Name);
column = select.Columns[2];
Assert.AreEqual("GroupNumber", column.ColumnAlias.Name);
Assert.AreEqual(TSQLExpressionType.Function, column.Expression.Type);
Assert.AreEqual("ROW_NUMBER", column.Expression.AsFunction.Function.Name);
}
}
public void SelectClause_StopAtFrom()
{
using (StringReader reader = new StringReader(@"select a from b;"))
using (ITSQLTokenizer tokenizer = new TSQLTokenizer(reader))
{
Assert.IsTrue(tokenizer.MoveNext());
TSQLSelectClause select = new TSQLSelectClauseParser().Parse(tokenizer);
Assert.AreEqual(2, select.Tokens.Count);
Assert.AreEqual(TSQLKeywords.FROM, tokenizer.Current.AsKeyword.Keyword);
Assert.AreEqual(1, select.Columns.Count);
Assert.IsNull(select.Columns[0].ColumnAlias);
Assert.AreEqual(TSQLExpressionType.Column, select.Columns[0].Expression.Type);
TSQLColumnExpression column = select.Columns[0].Expression.AsColumn;
Assert.IsNull(column.TableReference);
Assert.AreEqual("a", column.Column.Name);
}
}
public void SelectClause_ColumnAliasSyntaxes()
{
using (StringReader reader = new StringReader(
@"SELECT
ProductID,
p.[Name],
p.ProductNumber [Number],
p.MakeFlag AS IsMake,
IsFinishedGoods = p.FinishedGoodsFlag,
@Category AS ProductCategory,
p.*
FROM
Production.Product p;" ))
using (ITSQLTokenizer tokenizer = new TSQLTokenizer(reader))
{
Assert.IsTrue(tokenizer.MoveNext());
TSQLSelectClause select = new TSQLSelectClauseParser().Parse(tokenizer);
Assert.AreEqual(31, select.Tokens.Count);
Assert.AreEqual(TSQLKeywords.FROM, tokenizer.Current.AsKeyword.Keyword);
Assert.AreEqual(7, select.Columns.Count);
TSQLSelectColumn column = select.Columns[0];
Assert.IsNull(column.ColumnAlias);
Assert.AreEqual(TSQLExpressionType.Column, column.Expression.Type);
Assert.IsNull(column.Expression.AsColumn.TableReference);
Assert.AreEqual("ProductID", column.Expression.AsColumn.Column.Name);
column = select.Columns[1];
Assert.IsNull(column.ColumnAlias);
Assert.AreEqual(TSQLExpressionType.Column, column.Expression.Type);
Assert.AreEqual("p", column.Expression.AsColumn.TableReference.Single().AsIdentifier.Name);
Assert.AreEqual("Name", column.Expression.AsColumn.Column.Name);
column = select.Columns[2];
Assert.AreEqual("Number", column.ColumnAlias.Name);
Assert.AreEqual(TSQLExpressionType.Column, column.Expression.Type);
Assert.AreEqual("p", column.Expression.AsColumn.TableReference.Single().AsIdentifier.Name);
Assert.AreEqual("ProductNumber", column.Expression.AsColumn.Column.Name);
column = select.Columns[3];
Assert.AreEqual("IsMake", column.ColumnAlias.Name);
Assert.AreEqual(TSQLExpressionType.Column, column.Expression.Type);
Assert.AreEqual("p", column.Expression.AsColumn.TableReference.Single().AsIdentifier.Name);
Assert.AreEqual("MakeFlag", column.Expression.AsColumn.Column.Name);
column = select.Columns[4];
Assert.AreEqual("IsFinishedGoods", column.ColumnAlias.Name);
Assert.AreEqual(TSQLExpressionType.Column, column.Expression.Type);
Assert.AreEqual("p", column.Expression.AsColumn.TableReference.Single().AsIdentifier.Name);
Assert.AreEqual("FinishedGoodsFlag", column.Expression.AsColumn.Column.Name);
column = select.Columns[5];
Assert.AreEqual("ProductCategory", column.ColumnAlias.Name);
Assert.AreEqual(TSQLExpressionType.Variable, column.Expression.Type);
Assert.AreEqual("@Category", column.Expression.AsVariable.Variable.Text);
column = select.Columns[6];
Assert.IsNull(column.ColumnAlias);
Assert.AreEqual(TSQLExpressionType.Multicolumn, column.Expression.Type);
Assert.AreEqual("p", column.Expression.AsMulticolumn.TableReference.Single().AsIdentifier.Name);
}
}