On 03/07/2016 05:25 AM, Curt Huffman wrote:
Hello!
I’m struggling to insert a JSON object into my postgres v9.4 DB. I have
defined the column called "evtjson" as type json. (not jsonb)
I am trying to use a prepared statement in Java (jdk1.8) to insert a
Json object (built using JEE javax.json libraries) into the column, but
I keep running into SQLException errors.
I'm using JDBC 9.4.1208
I create the JSON object using:
|JsonObjectmbrLogRec =Json.createObjectBuilder().build();…mbrLogRec
=Json.createObjectBuilder().add("New MbrID",newId).build();|
Then I pass this object as a parameter to another method to write it to
the DB using a prepared statement. (along with several other fields) As:
|pStmt.setObject(11,dtlRec);|
You lost me here, I thought the object you are building is mbrLogRec?
Using this method, I receive the following error:
at org.postgresql.util.PSQLException: No hstore extension installed.
at
org.postgresql.jdbc.PgPreparedStatement.setMap(PgPreparedStatement.java:553)
at
org.postgresql.jdbc.PgPreparedStatement.setObject(PgPreparedStatement.java:1036)
I did try installing the hstore extension, but it then told me that it
was not an hstore object.
I have also tried:
|pStmt.setString(11,dtlRec.toString());pStmt.setObject(11,dtlRec.toString());|
Which produce a different error:
Event JSON: {"New MbrID":29}
SQLException: ERROR: column "evtjson" is of type json but expression
is of type character varying
Hint: You will need to rewrite or cast the expression.
But, at least this tells me that the DB is recognizing the column as
type JSON.
OracleDocs shows a number of various methods to set the parameter value
in the preparedStatement, but I'd rather not try them all if someone
knows the answer.
(http://docs.oracle.com/javase/8/docs/api/java/sql/PreparedStatement.html)
These also reference an additional parameter, SQLType, but I can't find
any refernce to these.
Should I try setAsciiStream? CharacterStream? CLOB? ???
I couldn't find any help or tutes on postgres or the web.
Thanks for any help.
-Curt
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
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