Indicates whether all the resulting data from a statement execution has been returned.

When a statement returns one or more rows this property indicates whether all of the rows have been returned. When a SQLStatement object's execute() method is called with a prefetch argument value, only the specified number of rows of the resulting data are returned in the SQLResult object's data property. Subsequent calls to SQLStatement.next() cause additional data to become available. This property is used to determine when the final results have been returned.

Note that because the number of rows is unknown at execution time, the database cursor must move beyond the last row before a statement's execution is considered complete. When the SQLStatement.execute() method is called with a prefetch argument, at least one row more than the total number of rows in the result set must be requested before the resulting SQLResult instance's complete property is true.

See also

The data returned as a result of the statement execution, specifically when a SQL SELECT statement is executed.

When a statement returns one or more rows this property is an array containing objects that represent the rows of result data. Each object in the array has property names that correspond to the result data set's column names.

For example, suppose you execute the following SQL SELECT statement:

     SELECT lastName, firstName

     FROM employees

     

Assuming the employees table contains 10 rows, the SQLResult.data property is an Array with 10 elements. Each element is an object with two properties, lastName and firstName.

The situation is more complex when you are using a SELECT statement with a complex result column, such as an aggregate function. For example, suppose you execute the following SQL:

     SELECT departmentId, SUM(salary)

     FROM employees

     GROUP BY departmentId

     

In the results from this statement, each object in the data Array has two properties named departmentId and SUM(salary). However, "SUM(salary)" is not a valid identifier. If you are using a computed column such as an aggregate or other function, specify an alias for the computed column in your SQL statement. The alias is used as the property name in the result data objects. For example, consider this alternative to the previous statement:

     SELECT departmentId, SUM(salary) AS salarySubtotal

     FROM employees

     GROUP BY departmentId

     

In this statement's data array, the result objects have two properties named departmentId and salarySubtotal.

The data property is always an Array regardless of how many rows and columns are in the result set. For example, the following SELECT statement results in one row and one column, which is essentially a single value:

     SELECT COUNT(*) AS numEmployees

     FROM employees

     

After executing the query the data property contains an Array object with one element. That element is an object with a single property, numEmployees.

If there are duplicate column names in the result data, for example if the SELECT statement includes an two different id columns from two different tables, the duplicate names are given property names according to the value of the SQLConnection.columnNameStyle property. By default, each column's name is used as the property name, but if there is are multiple columns in the result set with the same name, the long name format [table-name]_[column-name] is used for the identically named columns. This behavior can be changed by setting the SQLConnection.columnNameStyle property.

By default the objects in the data Array are Object instances. However, by setting the value of the SQLStatement.itemClass property to a class, the data Array elements are created as instances of that class instead. For every column in the result data set, the itemClass class must have a property whose name exactly matches the column name.

If a statement does not return any data this property is null. This is the case if the statement is not a SELECT statement, or if it is a SELECT statement that returns 0 rows.

See also

The last generated row identifier generated by a SQL INSERT statement.

The value is 0 if the executed statement was not an INSERT statement.

A row identifier is used to uniquely identify a row in a table within the database. The value is frequently generated by the database.

For more information about primary keys and generated row identifiers, see the "CREATE TABLE" and "Expressions" sections in the appendix "SQL support in local databases."

See also

Indicates how many rows were affected by the operation. Only changes that are directly specified by an INSERT, UPDATE, or DELETE statement are counted.

Auxiliary changes caused by triggers are not counted. Use the SQLConnection.totalChanges property to find the total number of changes including changes caused by triggers.

Note that when the related SQL operation is a DELETE statement with no WHERE clause (that is, the statement deletes all the rows in the table), the rowsAffected property is always 0, regardless of the number of rows that were deleted. If you need to know the number of rows that are deleted, you can include the WHERE clause WHERE 1 = 1, in which case all the rows are deleted, and the rowsAffected property accurately reflects the number of rows that were deleted. However, depending on the number of rows being deleted, doing so may have a negative impact on the statement's performance.

See also

Creates a SQLResult instance. Generally, developer code does not call the SQLResult constructor directly. To retrieve a SQLResult instance associated with a particular SQLStatement instance, call the instance's getResult() method. A SQLResult instance is also passed as an argument to the result handler function when a Responder instance is specified for an execute() or next() method call.