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help / color / mirror / Atom feedFrom: Eugene Yin <eugeneymail@ymail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-sql@postgresql.org <pgsql-sql@postgresql.org>
Subject: Re: BLOBs
Date: Mon, 11 Jan 2016 00:37:52 +0000 (UTC)
Message-ID: <1119695599.3064803.1452472672882.JavaMail.yahoo@mail.yahoo.com> (raw)
In-Reply-To: <15645.1452409962@sss.pgh.pa.us>
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I use the BLOB in an Oracle table to store IMG and document files. Now for Postgres(9.4.5), I have two options, i.e., BYTEA or OID.
With consideration of passing the params (SAVING) from the Java side as follows:
DiskFileItemDeepy file = myFile; InputStream is = null; long fileSize = 0; if (file != null && file.getFileSize() > 0){ is = file.getInputStream(); fileSize = file.getFileSize(); call.setBinaryStream(1, (InputStream)is, (long)fileSize);
}...call.execute();
//When retrieve the data use:
java.sql.Blob blob = (Blob) resultSet.getBlob(tableColumnName);
For the purpose mentioned above, which Postgres data type is a better candidate for replacement the BLOB, BYTEA or OID?
Thanks
Eugene
On Saturday, January 9, 2016 11:13 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
Eugene Yin <eugeneymail@ymail.com> writes:
> The following statement is excerpted from the
> "Oracle to Postgres Conversion"
> https://wiki.postgresql.org/wiki/Oracle_to_Postgres_Conversion#Grammar_Differences
My goodness, that's out of date (as you should have guessed from the
reference to "scheduled for an overhaul in summer 2000"). pg_dump
has been able to dump large objects just fine since 8.1 or so.
I don't know what else an Oracle user might be expecting that we don't
have, though, so I'm hesitant to change the text.
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: eugeneymail@ymail.com, tgl@sss.pgh.pa.us
Subject: Re: BLOBs
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