Dear,
We are using PostgreSQL (server version 9.4.5) with a JDBC connection (version 9.1.x).
It seems that JDBC implementation does not support the setting of a cursor name for an SQL statement. The following example will be used to illustrate the problem.
Consider that we have the SELECT statement below :
SELECT Column1,
Column2
Column3,
Column4
FROM MyTable
FOR UPDATE Then, we want to perform a positioned update based on the SELECT above :
UPDATE MyTable
SET Column1 = new_value,
Column3 = new_value
WHERE CURRENT OF cursor_name To achieve our goal, we would use the java.sql.Statement#
setCursorName(String) to
reference the SELECT statement. Then, using the java.sql.ResultSet#getCursorName() to get the used cursor name for the statement. Nevertheless, the
java.sql.ResultSet#getCursorName() returns null as value and even the java.sql.Statement#setCursorName(String) method seems to be not implemented.
Based on what explained above, we would like to ask four major questions :
- Is there any plan for the implementation of the mentioned feature in further JDBC versions ?
- Is there any alternative solution that aid us to perform a positioned update using JDBC ?
- If the JDBC implementation should be modified, can you guide us or give us ideas to get started ?
- If we are obliged to implement the feature by modifying the JDBC implementation, is there any interest in this modified JDBC ?
Thanks for your
feedback.
Best regards,
Hédi HACHENI
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