/// <summary> /// Checks if the provided column is NULL. /// </summary> /// <param name="table"></param> /// <param name="column"></param> public ConditionExpression(Type table, string column) { Type = ConditionExpressionType.IsNull; LeftTable = table; LeftTableName = SqlTableHelper.GetTableName(table); LeftColumn = column; }
/// <summary> /// Creates an UPDATE command from the provided connection using DbParameters. /// </summary> /// <param name="command"></param> public DbCommand GenerateCommand(DbConnection connection) { if (_newColumnValues.Count == 0) { throw new Exception("Can't update table without columns to be updated."); } var command = connection.CreateCommand(); StringBuilder sb = new StringBuilder($"UPDATE {SqlTableHelper.GetTableName<T>()} SET "); for (int i = 0; i < _newColumnValues.Count; i++) { var colVal = _newColumnValues[i]; var param = command.CreateParameter(); var paramName = Util.GetUniqueParameterName(); param.ParameterName = paramName; param.Value = colVal.Value; param.DbType = colVal.ValueType; command.Parameters.Add(param); sb.Append($"{Util.FormatSQL(colVal.Column)}={ProviderSpecific.ParameterPrefix}{paramName}"); if (i < _newColumnValues.Count - 1) { sb.Append(", "); } } command.CommandText += sb.ToString(); _condition?.GenerateCommand(command); return(command); }
/// <summary> /// Creates a CREATE command from the table class template. Uses the first int column as primary key. /// </summary> public BuiltCreateCommand() { _tableName = SqlTableHelper.GetTableName <T>(); _columns = SqlTableHelper.GetColumnAttributes <T>(); if (_columns.Count == 0) { throw new Exception("Can't create empty table."); } }
public ConditionExpression(Type leftTable, string leftColumn, string comparisonOperator, string value, DbType valueType) { Type = ConditionExpressionType.CompareToValue; LeftTable = leftTable; LeftTableName = SqlTableHelper.GetTableName(leftTable); LeftColumn = leftColumn; ComparisonOperator = comparisonOperator; Value = value; ValueType = valueType; }
public ConditionExpression(Type leftTable, string leftColumn, string comparisonOperator, Type rightTable, string rightColumn) { Type = ConditionExpressionType.CompareToColumn; LeftTable = leftTable; LeftTableName = SqlTableHelper.GetTableName(leftTable); LeftColumn = leftColumn; ComparisonOperator = comparisonOperator; RightTable = rightTable; RightTableName = SqlTableHelper.GetTableName(rightTable); RightColumn = rightColumn; }
/// <summary> /// Add all columns from the specified table to be selected. /// </summary> /// <typeparam name="T">The table containing the columns.</typeparam> public BuiltSelectCommand AddColumns <T>() { foreach (string column in SqlTableHelper.GetColumnNames <T>()) { string fullyQualified = $"{Util.FormatSQL(SqlTableHelper.GetTableName<T>(), column)}"; if (!_selectedColumns.Contains(fullyQualified)) { _selectedColumns.Add(fullyQualified); } } return(this); }
/// <summary> /// Adds a table to used in the FROM clause. /// </summary> /// <param name="tableType">The table to be added.</param> /// <param name="selectAllColumns">Whether all columns from this table should be added to the selection.</param> public BuiltSelectCommand AddTable(Type tableType, bool selectAllColumns = true) { string tableName = SqlTableHelper.GetTableName(tableType); _fromTables.Add(tableName); if (selectAllColumns) { AddColumns(tableType, SqlTableHelper.GetColumnNames(tableType).ToArray()); } return(this); }
/// <summary> /// Adds a JOIN to this BuiltSelectCommand. /// </summary> /// <param name="toJoin">The new table of this join.</param> /// <param name="on">The existing table to be used for comparison.</param> /// <param name="toJoinColumn">The column to use from the new table.</param> /// <param name="onColumn">The column to use from the existing table.</param> public BuiltSelectCommand Join(Type toJoin, Type on, string toJoinColumn, string onColumn) { if (!SqlTableHelper.ContainsColumn(toJoin, toJoinColumn) || !SqlTableHelper.ContainsColumn(on, onColumn)) { throw new Exception("The specified tables do not contain the specified columns."); } _joins.Add(new SqlJoin { FirstTable = SqlTableHelper.GetTableName(on), SecondTable = SqlTableHelper.GetTableName(toJoin), FirstColumn = onColumn, SecondColumn = toJoinColumn }); return(this); }
/// <summary> /// Add a column to be sorted. /// </summary> /// <typeparam name="T">The table that the column resides in.</typeparam> /// <param name="column">The column to be used for sorting.</param> /// <param name="mode">The sorting mode to be used for this column.</param> public BuiltSqlSort SortBy <T>(string column, SqlSortMode mode) { switch (mode) { case SqlSortMode.ASCENDING: _sortingParametersAscending.Add($"{Util.FormatSQL(SqlTableHelper.GetTableName<T>(), column)}"); break; case SqlSortMode.DESCENDING: _sortingParametersDescending.Add($"{Util.FormatSQL(SqlTableHelper.GetTableName<T>(), column)}"); break; default: throw new ArgumentOutOfRangeException(nameof(mode), mode, null); } return(this); }
/// <summary> /// Add columns to be selected. /// </summary> /// <param name="tableType">The table containing the columns.</param> /// <param name="columns">The columns to be selected.</param> public BuiltSelectCommand AddColumns(Type tableType, params string[] columns) { string tableName = SqlTableHelper.GetTableName(tableType); if (!SqlTableHelper.ContainsAllColumns(tableType, columns)) { throw new Exception($"Table \"{SqlTableHelper.GetTableName(tableType)}\" does not contain all columns specified."); } foreach (string column in columns) { string fullyQualified = $"{Util.FormatSQL(tableName, column)}"; if (!_selectedColumns.Contains(fullyQualified)) { _selectedColumns.Add(fullyQualified); } } return(this); }
/// <summary> /// Generates the actual UPDATE command string. /// </summary> public string GenerateStatement() { if (_newColumnValues.Count == 0) { throw new Exception("Can't update table without columns to be updated."); } StringBuilder sb = new StringBuilder($"UPDATE {SqlTableHelper.GetTableName<T>()} SET "); for (int i = 0; i < _newColumnValues.Count; i++) { var colVal = _newColumnValues[i]; sb.Append($"{Util.FormatSQL(colVal.Column)}={colVal.Value}"); if (i < _newColumnValues.Count - 1) { sb.Append(", "); } } sb.Append(_condition?.GenerateStatement()); return(sb.ToString()); }
/// <summary> /// Specify the table to delete from. /// </summary> /// <typeparam name="T">The table you want to delete from.</typeparam> public BuiltDeleteCommand From <T>() { _table = SqlTableHelper.GetTableName <T>(); return(this); }
internal BuiltAlterTableCommand() { _table = SqlTableHelper.GetTableName <T>(); _components = new List <string>(); }
internal BuiltInsertCommand(params string[] columns) { _rowValues = new List <BuiltValueList <T> >(); _table = SqlTableHelper.GetTableName <T>(); _columns = new List <string>(columns); }
internal BuiltInsertCommand() { _rowValues = new List <BuiltValueList <T> >(); _table = SqlTableHelper.GetTableName <T>(); _columns = SqlTableHelper.GetColumnNames <T>(); }