Search Results

JDBC Update

JDBC Update is an asynchronous activity that performs the specified SQL INSERT, UPDATE, or DELETE statement.

General

If this activity is not part of a transaction group, the SQL statement is committed after the activity completes. If this activity is part of a transaction group, the SQL statement is committed or rolled back with the other JDBC activities in the group at the end of the transaction.

If you want to override the default behavior of transaction groups for certain JDBC activities in a transaction group, you can select the Override Transaction Behavior check box on the Advanced tab. This specifies that the activity is outside of the transaction and the SQL statement is committed when the activity completes, even if the activity is in a transaction group.

The SQL statement is committed after the activity completes.

The General tab has the following fields.

Field Literal Value/Module Property? Description
Name None The name to be displayed as the label for the activity in the process.
JDBC Shared Resource Yes The path to the shared resource containing the JDBC connection information.

For details, refer to JDBC Connection.

Timeout Yes The time (in seconds) to wait for the query to complete. If the query does not complete in the given time limit, an error is returned.

Description

Provide a short description for the activity.

Statement

The Statement tab has the following fields.

Field Description
Statement This is an SQL INSERT UPDATE OR DELETE statement to perform in the database. You can use the SQL Builder wizard to build the query for the desired database.
Prepared Statement The Prepared Statement contains the Parameter Name and Datatype fields. All the parameters defined in the Prepared Statement table are shown in the Input tab of the activity for the user to provide values.

Each prepared statement corresponds to the question mark in the same position in the SQL statement. That is, the first prepared statement in the list corresponds to the first question mark, the second prepared statement in the list corresponds to the second question mark, and so on. The warning is for informational purposes only, you must make sure the parameters in this field correctly correspond to the statement.

Advanced

The Advanced tab has the following fields.

Field Description
ThreadPool SharedResource Specifies a queue of threads available to run a queue of tasks. Thread pools are used to improve performance when executing large numbers of asynchronous tasks by reducing per task invocation overhead, provide a means of bounding, and managing the resources consumed when executing a collection of tasks.
Insert if record doesn't exist Select this check box to insert the record if it does not exist in the database.
Override Transaction Behavior Overrides the default behavior of a transaction group. If this activity is in a transaction group, the activity is normally committed or rolled back with the other transactional activities.

If you select this check box, this activity is not part of the transaction group and is committed when it completes. Selecting this option uses a separate database connection to perform the activity and commit the SQL statement.

Override JDBC Connection Selecting this option overrides the default datasource connection, and allows for SQL queries to be executed against the optional datasource.

After selecting this option, the sharedResourceName field is enabled under the Input > Data Source tab. From the sharedResourceName field, type the complete path with the name of the optional datasource, which can be found under the Resources folder. For example, if a JDBC shared resource is located at Resources > Package_Name > JDBC_SR_Name, then the value you enter should be Package_Name.JDBC_SR_Name. The value you enter in the XPath Expression field is case sensitive and must be a string.

To avoid mapping issues, ensure the optional datasource maintains a structure that is identical to the default database, and that both datasources are using the same datatypes.
Note: Transactions between multiple datasources is not supported.
Interpret Empty String as Null Specifies how empty strings in the activity’s input elements should be handled.

Selecting this check box sends the nulls to the database where empty strings are supplied.

When the check box is not selected, empty strings are treated as zero-length strings. Whether you use this check box option or not, you can still use XPath to set input elements explicitly to null.
Note: Many databases treat empty strings and nulls as the same, so this check box does not affect how the database interprets empty strings.
Batch Update

Selecting this check box signifies that you want to perform multiple statements by supplying an array of records as input to the activity where each record matches the prepared parameters for the statement. The statements are performed in one batch at the end of the activity’s execution.

If you do not select this check box, the expected input is the list of prepared parameters for the statement (no array of records). Some database drivers may not support batch updates. A JDBCSQLException is thrown, if the database driver does not support batch updates.

Input

The following is the input for the activity.

Input Item Datatype Description
ServerTimeZone string Specifies the time zone for the database server.
timeout number The time (in seconds) to wait for the query to complete. If the query does not complete in the given time limit, an error is returned.

Output

The following is the output for the activity.

Output Item Datatype Description
noOfUpdates integer The number of updates performed by the statement specified on the General tab.

This element can also return -2 that indicates, in the event of a batch update, that the updates were successful, but it is unknown how many updates were performed.

Fault

The Fault tab lists the possible exceptions thrown by this activity. See Error Codes for more information about error codes and the corrective action to take.

Fault Thrown When..
JDBCConnectionNotFoundException An error occurred when attempting to connect to the specified database.
InvalidTimeZoneException An invalid time zone was specified.
JDBCSQLException An SQL error occurred.
LoginTimedOutException A timeout has occurred while attempting to connect to the database.
InvalidSQLTypeException A parameter’s datatype does not match the datatype of the table column.
ActivityTimedOutException The operation has timed out.