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Titanium.Database.ResultSet
Extends Titanium.Proxy
The ResultSet instance returned by Titanium.Database.DB.execute.
A result set represents the results returned by a database query.
The rowCount property identifies the number of
rows in the result set. The ResultSet object maintains an internal record of the
current row. As shown in the example, you can use the
next method to iterate through the rows in the set.
Use the field or fieldByName methods to query the fields for the current row.
On the iOS platform, closing the database also closes the result set, that is, you can only access the result set if the database is currently open.
Examples
Using ResultSet
The following code will create a database and execute SQL statements that will create a
table, insert data into it, query the table and iterate through the returned
ResultSet.
var db = Ti.Database.open('mydb1Installed');
db.execute('CREATE TABLE IF NOT EXISTS people (name TEXT, phone_number TEXT, city TEXT)');
db.execute('DELETE FROM people');
var thisName = 'Arthur';
var thisPhoneNo = '1-617-000-0000';
var thisCity = 'Mountain View';
db.execute('INSERT INTO people (name, phone_number, city) VALUES (?, ?, ?)', thisName, thisPhoneNo, thisCity);
var personArray = ['Paul','020 7000 0000', 'London'];
db.execute('INSERT INTO people (name, phone_number, city) VALUES (?, ?, ?)', personArray);
var rows = db.execute('SELECT rowid,name,phone_number,city FROM people');
Ti.API.info('Row count: ' + rows.rowCount);
var fieldCount = rows.fieldCount;
Ti.API.info('Field count: ' + fieldCount);
while (rows.isValidRow()){
Ti.API.info('Person ---> ROWID: ' + rows.fieldByName('rowid') + ', name:' + rows.field(1) + ', phone_number: ' + rows.fieldByName('phone_number') + ', city: ' + rows.field(3));
rows.next();
}
rows.close();
db.close();
Note that the above SELECT query contains the rowid
field, which contains an SQLite-specific unique identifier for each row.
Properties 6
Inherited from Titanium.Proxy
The name of the API that this proxy corresponds to.
Inherited from Titanium.Proxy
Indicates if the proxy will bubble an event to its parent.
Default: true
The number of columns in this result set.
Inherited from Titanium.Proxy
The Window or TabGroup whose Activity lifecycle should be triggered on the proxy.
The number of rows in this result set.
Indicates whether the current row is valid.
Methods 11
Inherited from Titanium.Proxy
Adds the specified callback as an event listener for the named event.
| Parameters | Type | Description |
|---|---|---|
| name | String | Name of the event. |
| callback | Callback<Titanium.Event> | Callback function to invoke when the event is fired. 4 fields
|
applyProperties
since 3.0.0Inherited from Titanium.Proxy
Applies the properties to the proxy.
| Parameters | Type | Description |
|---|---|---|
| props | Dictionary | A dictionary of properties to apply. |
Closes this result set and release resources. Once closed, the result set must no longer be used.
Retrieves the value for the specified field in the current row, and casts it to the specified type (String, Integer, Float or Double.)
All of the numeric types (Integer, Float or Double) are returned as JavaScript Number objects.
If no type parameter is specified, the returned data type depends on the data in the column.
- If the data in the column is TEXT, the data is returned as a String.
- If the data in the column is any kind of number, the data is returned as a Number.
- If the data in the column is a BLOB, the data is returned as a Titanium.Blob object.
When a type is specified and the data cannot be converted to the specified type, an
exception is thrown.
Returns null if the value in the table is NULL.
| Parameters | Type | Description |
|---|---|---|
| index | Number | A zero-based column index. |
| type? | Number | Type to cast field value. |
return type varies based on the underlying data and optional type argument. If BLOB, we return a Titanium.Blob. If TEXT, we return String. If any kind of number, we return a Number.
Retrieves the value for the specified field in the current row, and casts it to the specified type (String, Integer, Float or Double.)
All of the numeric types (Integer, Float or Double) are returned as JavaScript Number objects.
If no type parameter is specified, the returned data type depends on the data in the column.
- If the data in the column is TEXT, the data is returned as a String.
- If the data in the column is any kind of number, the data is returned as a Number.
- If the data in the column is a BLOB, the data is returned as a Titanium.Blob object.
When a type is specified and the data cannot be converted to the specified type, an
exception is thrown.
Returns null if the value in the table is NULL.
| Parameters | Type | Description |
|---|---|---|
| name | String | A column name or alias used in the SQL query. |
| type? | Number | Type to cast for the field value. |
return type varies based on the underlying data and optional type argument. If BLOB, we return a Titanium.Blob. If TEXT, we return String. If any kind of number, we return a Number.
Returns the field name for the specified field index.
| Parameters | Type | Description |
|---|---|---|
| index | Number | A zero-based column index for the field. |
Inherited from Titanium.Proxy
Fires a synthesized event to any registered listeners.
| Parameters | Type | Description |
|---|---|---|
| name | String | Name of the event. |
| event? | Dictionary | A dictionary of keys and values to add to the Titanium.Event object sent to the listeners. |
getFieldName
AndroidReturns the field name for the specified field index.
| Parameters | Type | Description |
|---|---|---|
| index | Number | A zero-based column index for the field. |
Returns whether the current row is valid.
Advances to the next row in the result set and returns true if one exists,
or false otherwise.
Inherited from Titanium.Proxy
Removes the specified callback as an event listener for the named event.
| Parameters | Type | Description |
|---|---|---|
| name | String | Name of the event. |
| callback | Callback<Titanium.Event> | Callback function to remove. Must be the same function passed to 4 fields
|