public static void Build(IQueryContext context, CreateTableNode node, ICollection<SqlStatement> statements)
{
string idColumn = null;
var dataTypeBuilder = new DataTypeBuilder();
var tableName = node.TableName;
var objTableName = ObjectName.Parse(tableName.Name);
var constraints = new List<ConstraintInfo>();
var columns = new List<SqlTableColumn>();
var expBuilder = new ExpressionBuilder();
foreach (var column in node.Columns) {
var dataType = dataTypeBuilder.Build(context.TypeResolver(), column.DataType);
var columnInfo = new SqlTableColumn(column.ColumnName.Text, dataType);
if (column.Default != null)
columnInfo.DefaultExpression = expBuilder.Build(column.Default);
if (column.IsIdentity) {
if (!String.IsNullOrEmpty(idColumn))
throw new InvalidOperationException(String.Format("Table {0} defines already {1} as identity column.",
node.TableName, idColumn));
if (column.Default != null)
throw new InvalidOperationException(String.Format("The identity column {0} cannot have a DEFAULT constraint.",
idColumn));
idColumn = column.ColumnName.Text;
columnInfo.DefaultExpression = SqlExpression.FunctionCall("UNIQUEKEY",
new[] {SqlExpression.Constant(node.TableName.Name)});
}
foreach (var constraint in column.Constraints) {
if (String.Equals(ConstraintTypeNames.Check, constraint.ConstraintType, StringComparison.OrdinalIgnoreCase)) {
var exp = expBuilder.Build(constraint.CheckExpression);
constraints.Add(ConstraintInfo.Check(objTableName, exp, column.ColumnName.Text));
} else if (String.Equals(ConstraintTypeNames.ForeignKey, constraint.ConstraintType, StringComparison.OrdinalIgnoreCase)) {
var fTable = ObjectName.Parse(constraint.ReferencedTable.Name);
var fColumn = constraint.ReferencedColumn.Text;
var fkey = ConstraintInfo.ForeignKey(objTableName, column.ColumnName.Text, fTable, fColumn);
if (!String.IsNullOrEmpty(constraint.OnDeleteAction))
fkey.OnDelete = GetForeignKeyAction(constraint.OnDeleteAction);
if (!String.IsNullOrEmpty(constraint.OnUpdateAction))
fkey.OnUpdate = GetForeignKeyAction(constraint.OnUpdateAction);
constraints.Add(fkey);
} else if (String.Equals(ConstraintTypeNames.PrimaryKey, constraint.ConstraintType, StringComparison.OrdinalIgnoreCase)) {
constraints.Add(ConstraintInfo.PrimaryKey(objTableName, column.ColumnName.Text));
} else if (String.Equals(ConstraintTypeNames.UniqueKey, constraint.ConstraintType, StringComparison.OrdinalIgnoreCase)) {
constraints.Add(ConstraintInfo.Unique(objTableName, column.ColumnName.Text));
} else if (String.Equals(ConstraintTypeNames.NotNull, constraint.ConstraintType, StringComparison.OrdinalIgnoreCase)) {
columnInfo.IsNotNull = true;
} else if (String.Equals(ConstraintTypeNames.Null, constraint.ConstraintType, StringComparison.OrdinalIgnoreCase)) {
columnInfo.IsNotNull = false;
}
}
columns.Add(columnInfo);
}
foreach (var constraint in node.Constraints) {
if (String.Equals(ConstraintTypeNames.Check, constraint.ConstraintType, StringComparison.OrdinalIgnoreCase)) {
var exp = expBuilder.Build(constraint.CheckExpression);
constraints.Add(ConstraintInfo.Check(constraint.ConstraintName, objTableName, exp, constraint.Columns.ToArray()));
} else if (String.Equals(ConstraintTypeNames.PrimaryKey, constraint.ConstraintType, StringComparison.OrdinalIgnoreCase)) {
constraints.Add(ConstraintInfo.PrimaryKey(constraint.ConstraintName, objTableName, constraint.Columns.ToArray()));
} else if (String.Equals(ConstraintTypeNames.UniqueKey, constraint.ConstraintType, StringComparison.OrdinalIgnoreCase)) {
constraints.Add(ConstraintInfo.Unique(constraint.ConstraintName, objTableName, constraint.Columns.ToArray()));
} else if (String.Equals(ConstraintTypeNames.ForeignKey, constraint.ConstraintType, StringComparison.OrdinalIgnoreCase)) {
var fTable = ObjectName.Parse(constraint.ReferencedTableName.Name);
var fColumns = constraint.ReferencedColumns;
var fkey = ConstraintInfo.ForeignKey(constraint.ConstraintName, objTableName, constraint.Columns.ToArray(), fTable,
fColumns.ToArray());
if (!String.IsNullOrEmpty(constraint.OnDeleteAction))
fkey.OnDelete = GetForeignKeyAction(constraint.OnDeleteAction);
if (!String.IsNullOrEmpty(constraint.OnUpdateAction))
fkey.OnUpdate = GetForeignKeyAction(constraint.OnUpdateAction);
constraints.Add(fkey);
}
}
//TODO: Optimization: merge same constraints
statements.Add(MakeCreateTable(tableName.Name, columns, node.IfNotExists, node.Temporary));
foreach (var constraint in constraints) {
statements.Add(MakeAlterTableAddConstraint(tableName.Name, constraint));
}
}
private static void BuildAction(ITypeResolver typeResolver, ObjectName tableName, IAlterActionNode action, SqlCodeObjectBuilder builder)
{
if (action is AddColumnNode)
{
var column = ((AddColumnNode)action).Column;
var constraints = new List <SqlTableConstraint>();
var columnInfo = column.BuildColumn(typeResolver, tableName.FullName, constraints);
builder.AddObject(new AlterTableStatement(tableName, new AddColumnAction(columnInfo)));
foreach (var constraint in constraints)
{
builder.AddObject(new AlterTableStatement(tableName, new AddConstraintAction(constraint)));
}
}
else if (action is AddConstraintNode)
{
var constraint = ((AddConstraintNode)action).Constraint;
var constraintInfo = constraint.BuildConstraint();
builder.AddObject(new AlterTableStatement(tableName, new AddConstraintAction(constraintInfo)));
}
else if (action is DropColumnNode)
{
var columnName = ((DropColumnNode)action).ColumnName;
builder.AddObject(new AlterTableStatement(tableName, new DropColumnAction(columnName)));
}
else if (action is DropConstraintNode)
{
var constraintName = ((DropConstraintNode)action).ConstraintName;
builder.AddObject(new AlterTableStatement(tableName, new DropConstraintAction(constraintName)));
}
else if (action is SetDefaultNode)
{
var actionNode = ((SetDefaultNode)action);
var columnName = actionNode.ColumnName;
var expression = ExpressionBuilder.Build(actionNode.Expression);
builder.AddObject(new AlterTableStatement(tableName, new SetDefaultAction(columnName, expression)));
}
else if (action is DropDefaultNode)
{
var columnName = ((DropDefaultNode)action).ColumnName;
builder.AddObject(new AlterTableStatement(tableName, new DropDefaultAction(columnName)));
}
else if (action is AlterColumnNode)
{
var column = ((AlterColumnNode)action).Column;
var constraints = new List <SqlTableConstraint>();
var columnInfo = column.BuildColumn(typeResolver, tableName.FullName, constraints);
// CHECK: Here we do a drop and add column: is there a better way on the back-end?
builder.AddObject(new AlterTableStatement(tableName, new DropColumnAction(columnInfo.ColumnName)));
builder.AddObject(new AlterTableStatement(tableName, new AddColumnAction(columnInfo)));
foreach (var constraint in constraints)
{
builder.AddObject(new AlterTableStatement(tableName, new AddConstraintAction(constraint)));
}
}
}
private SqlExpression Expression(IExpressionNode node)
{
var visitor = new ExpressionBuilder();
return visitor.Build(node);
}
/// <summary>
/// Parses the given SQL string to an expression that can be evaluated.
/// </summary>
/// <param name="s">The string to parse.</param>
/// <param name="context"></param>
/// <returns>
/// Returns an instance of <seealso cref="SqlExpression"/> that represents
/// the given SQL string parsed.
/// </returns>
public static SqlExpression Parse(string s, ISystemContext context)
{
try {
// TODO: Get the expression compiler from the context
var compiler = SqlParsers.Expression;
var result = compiler.Parse(s);
if (result.HasErrors)
throw new SqlParseException();
var visitor = new ExpressionBuilder();
return visitor.Build(result.RootNode);
} catch (SqlParseException ex) {
throw new SqlExpressionException(ExpressionErrorCodes.CannotParse,
"Could not parse input expression: see inner exception for details.", ex);
}
}
