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JDBC reads a large amount of data, resulting in memory overflow

2022-07-05 18:07:00 【shy_ snow】

jdbc Querying a large amount of data into memory will lead to memory overflow , You need to set the result set read-only and obtain data in batches 

            Statement stmt = this.connect.createStatement(ResultSet.TYPE_FORWARD_ONLY,ResultSet.CONCUR_READ_ONLY);
            stmt.setFetchSize(Integer.MIN_VALUE);
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