I have to write a SQL query for Postgres database as follows:
DELETE FROM employee WHERE ename IN (?)
I want to pass ename as list or string which will contain multiple employee names, e.g. "abc, bcd, efg". How to set the values?
How to use IN clause with PreparedStatement in Postgres?
There are several ways to do this. The clean way is to pass an array to the prepared statement. An alternative to Nick's answer is to pass a proper java.sql.Array value:
PreparedStatement pstmt = connection.prepareStatement(
"DELETE FROM employee WHERE ename = ANY (?)");
String[] idList = new String[] {"abc", "bcd", "efg"};
Array ids = connection.createArray("varchar", idList);
pstmt.setArray(1, ids);
Another option is to use Postgres' string functions to convert the comma separated list to an array. That is probably the easiest way:
PreparedStatement pstmt = connection.prepareStatement(
"DELETE FROM employee WHERE ename = ANY (string_to_array(?, ','))");
psmt.setString(1, "abc,bcd,efg");
Note that you must not have spaces between the comma and the value! Those spaces will be part of the value that is stored in the array after string_to_array() has done it's job so comparison would e.g. be ename = ' bcd' which would fail if there is no leading space in the column ename(which is highly likely)
the_leafs_just_won_the_stanley_cup as a delimiter, since that hasn't been true since before SQL was invented, so it wouldn't be one of the values.
connection.createArrayOf instead of connection.createArray (keep parameters the same). Thanks.Like this:
DELETE FROM employee WHERE ename = ANY(?)
The parameter should be formatted as an array literal, e.g. "{abc,bcd,efg}".
You might want to try the below:
DELETE FROM employee
WHERE ename IN ('abc', 'bcd', 'efg')
where ename = any(<array parameter or constant here>). Funny, but PostgreSQL transformsinclause into= any(...), internally, can see it in the query plans.