08.12.2020

Vertica Prepared Statement Return Generated Keys

Vertica Prepared Statement Return Generated Keys Free
Vertica Prepared Statement Return Generated Keys Pdf

JDBC's auto-generated keys feature provides a way to retrieve valuesfrom columns that are part of an index or have a default value assigned. Derby supports the auto-incrementfeature, which allows users to create columns in tables for which the databasesystem automatically assigns increasing integer values. Users can call themethod Statement.getGeneratedKeys to retrieve the value of such a column.This method returns a ResultSet object with a column for theautomatically generated key. TheDerby implementation ofStatement.getGeneratedKeys returns meaningful results only if the laststatement was a single-row insert statement. If it was a multi-row insert,Statement.getGeneratedKeys will return a result set with only a singlerow, even though it should return one row for each inserted row.

Sql-statement can be a single-row INSERT statement or a multiple-row INSERT statement. With the first form, you specify the names of the columns for which you want automatically generated keys. With the second form, you specify the positions in the table of the columns for which you want automatically generated keys.
This method returns a ResultSet object with a column for the automatically generated key. The Derby implementation of Statement.getGeneratedKeys returns meaningful results only if the last statement was a single-row insert statement. If it was a multi-row insert, Statement.getGeneratedKeys will return a result set with only a single row, even though it should return one row for each inserted row.

Calling ResultSet.getMetaData onthe ResultSet object returned by getGeneratedKeys produces a ResultSetMetaData objectthat is similar to that returned by IDENTITY_VAL_LOCAL.

The following are Jave code examples for showing how to use getGeneratedKeys of the java.sql.PreparedStatement class. You can vote up the examples you like. Your votes will be used in our system to get more good examples. Write an example for JDBC prepared statement with ResultSet. How to get primary key value (auto-generated keys) from inserted queries using JDBC? Write a simple program for CallableStatement statement to execute stored procedure. Write a program for CallableStatement statement with stored procedure returns OUT parameters. Write a program for. Mar 27, 2020 What a year to make a comeback. After a four-year hiatus, the Vertica Big Data Conference was all set to return this month, until the novel coronavirus came along.The rapidly spreading virus has c. When we are inserting a record into the database table and the primary key is an auto-increment or auto-generated key, then the insert query will generate it dynamically. The below example shows how to get this key after insert statement. After perfoming executeUpdate method on PreparedStatement, call getGeneratedKeys method on PreparedStatement. This method returns a ResultSet object with a column for the automatically generated key. The Derby implementation of Statement.getGeneratedKeys returns meaningful results only if the last statement was a single-row insert statement. If it was a multi-row insert, Statement.getGeneratedKeys will return a result set with only a single row, even though it should return.

Users can indicate that auto-generated columns should be made availablefor retrieval by passing one of the following values as a second argumentto the Connection.prepareStatement, Statement.execute, or Statement.executeUpdate methods:

A constant indicating that auto-generated keys should be made available. The specific constant to use is Statement.RETURN_GENERATED_KEYS.
An array of the names of the columns in the inserted row that should be made available. If any column name in the array does not designatean auto-increment column, Derby will throw an error with the Derby embeddeddriver. With the client driver, the one element column name is ignored currently and the value returned corresponds to the identity column. To ensure compatibility with future changes an application should ensure the column described is the identity column. If the column name corresponds to another column or a non-existent column then future changes may result in a value for a different column being returned or an exception being thrown.
An array of the positions of the columns in the inserted row that shouldbe made available. If any column position in the array does not correlate to an auto-increment column, Derby willthrow an error with the Derby embeddeddriver. With the client driver, the one element position array is ignored currently and the value returned corresponds to the identity column. To ensure compatibility with future changes an application should ensure the column described is the identity column. If the position corresponds to another column or a non-existent column then future changes may result in a value for a different column being returned or an exception being thrown.

Example

Assume that we have a table TABLE1 definedas follows:

The following three code fragments will all do the same thing:that is, they will create a ResultSet that contains the value of C12 that is inserted into TABLE1.

Code fragment 1: Counter strike global offensive key generator download.

Code fragment 2:

Vertica Prepared Statement Return Generated Keys

Code fragment 3:

If there is no indication that auto-generated columns shouldbe made available for retrieval, a call to Statement.getGeneratedKeys will return a null ResultSet.

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The following tables list the members that are exposed by the SQLServerPreparedStatement class.

Constructors

None.

Fields

None.