Re: Text array in prepared statements returns null when using binary tranfer

The "bug" is that we dont' implement toString on the binary type. Which is
not actually a bug.

In order to get the array you need to:

SqlArray array=rs.getArray(1)
String[] s = array.getArray()

see http://docs.oracle.com/javase/tutorial/jdbc/basics/array.html

Cheers,

Dave Cramer

dave.cramer(at)credativ(dot)ca
http://www.credativ.ca

On 3 February 2015 at 08:21, Asier Lostalé <asier(dot)lostale(at)openbravo(dot)com>
wrote:

> Hi,
>
> When using binary transfer, I'm having problems using a prepared statement
> that returns a text array type: it returns null when it uses the prepared
> statement where it should have value.
>
> If I set the binaryTransfer property to false, it works fine.
>
> I've tested it using postgresql-9.3-1102.jdbc4.jar in a PG 9.2 and 9.3
> database.
>
> With older jdbc versions (ie. postgresql-9.0-801.jdbc4.jar), which don't
> implement the binary transfer, it works fine.
>
> Here is the code I tested:
>
> import java.sql.Connection;
> import java.sql.Driver;
> import java.sql.DriverManager;
> import java.sql.PreparedStatement;
> import java.sql.ResultSet;
> import java.sql.SQLException;
> import java.util.Properties;
>
> public class TestMe {
> public static void main(String[] args) throws SQLException {
> String url = "jdbc:postgresql://localhost:5433/pi1";
> Connection conn = null;
> // org.postgresql.Driver.setLogLevel(org.postgresql.Driver.DEBUG);
>
> Properties connectionProps = new Properties();
> connectionProps.put("user", "tad");
> connectionProps.put("password", "password");
> connectionProps.put("binaryTransfer", "true");
> conn = DriverManager.getConnection(url, connectionProps);
>
> Driver driver = DriverManager.getDriver(url);
> conn = driver.connect(url, connectionProps);
> System.out.println(org.postgresql.Driver.MAJORVERSION + "."
> + org.postgresql.Driver.MINORVERSION);
>
> PreparedStatement fs = conn
> .prepareStatement("SELECT proargnames FROM pg_proc where proname
> ='pg_cursor'");
>
> ((org.postgresql.PGStatement) fs).setPrepareThreshold(1);
> // execute twice to use prepared statement 2nd time
> for (int i = 0; i < 2; i++) {
> ResultSet rs = fs.executeQuery();
> rs.next();
>
> System.out.println(rs.getArray(1));
> rs.close();
> }
> }
> }
>
> This is the output:
>
> 9.3
> {name,statement,is_holdable,is_binary,is_scrollable,creation_time}
> null
>
> note second time it return null for the same query.
>
> Here is the output setting log to debug.
>
> 14:20:58.961 (1) PostgreSQL 9.3 JDBC4 (build 1102)
> 14:20:58.967 (1) Trying to establish a protocol version 3 connection to
> localhost:5433
> 14:20:58.991 (1) Receive Buffer Size is 131003
> 14:20:58.991 (1) Send Buffer Size is 331875
> 14:20:58.991 (1) FE=> StartupPacket(user=tad, database=pi1,
> client_encoding=UTF8, DateStyle=ISO, extra_float_digits=2,
> TimeZone=Europe/Madrid)
> 14:20:58.994 (1) <=BE AuthenticationOk
> 14:20:59.008 (1) <=BE ParameterStatus(application_name = )
> 14:20:59.008 (1) <=BE ParameterStatus(client_encoding = UTF8)
> 14:20:59.009 (1) <=BE ParameterStatus(DateStyle = ISO, DMY)
> 14:20:59.009 (1) <=BE ParameterStatus(integer_datetimes = on)
> 14:20:59.009 (1) <=BE ParameterStatus(IntervalStyle = postgres)
> 14:20:59.009 (1) <=BE ParameterStatus(is_superuser = on)
> 14:20:59.009 (1) <=BE ParameterStatus(server_encoding = UTF8)
> 14:20:59.009 (1) <=BE ParameterStatus(server_version = 9.3.5)
> 14:20:59.009 (1) <=BE ParameterStatus(session_authorization = tad)
> 14:20:59.009 (1) <=BE ParameterStatus(standard_conforming_strings = on)
> 14:20:59.009 (1) <=BE ParameterStatus(TimeZone = Europe/Madrid)
> 14:20:59.009 (1) <=BE BackendKeyData(pid=28270,ckey=1496394801)
> 14:20:59.009 (1) <=BE ReadyForQuery(I)
> 14:20:59.010 (1) simple execute,
> handler=org(dot)postgresql(dot)core(dot)SetupQueryRunner$SimpleResultHandler(at)6bc947,
> maxRows=0, fetchSize=0, flags=23
> 14:20:59.011 (1) FE=> Parse(stmt=null,query="SET extra_float_digits =
> 3",oids={})
> 14:20:59.012 (1) FE=> Bind(stmt=null,portal=null)
> 14:20:59.012 (1) FE=> Execute(portal=null,limit=1)
> 14:20:59.012 (1) FE=> Sync
> 14:20:59.013 (1) <=BE ParseComplete [null]
> 14:20:59.013 (1) <=BE BindComplete [null]
> 14:20:59.013 (1) <=BE CommandStatus(SET)
> 14:20:59.013 (1) <=BE ReadyForQuery(I)
> 14:20:59.014 (1) compatible = 9.3
> 14:20:59.014 (1) loglevel = 2
> 14:20:59.015 (1) prepare threshold = 5
> 14:20:59.020 (1) types using binary send =
> INT8_ARRAY,TIMESTAMPTZ,FLOAT4_ARRAY,FLOAT8_ARRAY,UUID,TEXT_ARRAY,VARCHAR_ARRAY,BYTEA,TIME,FLOAT4,FLOAT8,INT2_ARRAY,TIMETZ,INT2,INT8,INT4,INT4_ARRAY,TIMESTAMP,POINT,BOX
> 14:20:59.023 (1) types using binary receive =
> INT8_ARRAY,TIMESTAMPTZ,FLOAT4_ARRAY,FLOAT8_ARRAY,UUID,TEXT_ARRAY,VARCHAR_ARRAY,BYTEA,TIME,DATE,FLOAT4,FLOAT8,INT2_ARRAY,TIMETZ,INT2,INT8,INT4,INT4_ARRAY,TIMESTAMP,POINT,BOX
> 14:20:59.023 (1) integer date/time = true
> getConnection returning org.postgresql.Driver
> DriverManager.getDriver("jdbc:postgresql://localhost:5433/pi1")
> getDriver returning org.postgresql.Driver
> 14:20:59.035 (driver) Connecting with URL:
> jdbc:postgresql://localhost:5433/pi1
> 14:20:59.035 (2) PostgreSQL 9.3 JDBC4 (build 1102)
> 14:20:59.035 (2) Trying to establish a protocol version 3 connection to
> localhost:5433
> 14:20:59.036 (2) Receive Buffer Size is 131003
> 14:20:59.036 (2) Send Buffer Size is 331875
> 14:20:59.036 (2) FE=> StartupPacket(user=tad, database=pi1,
> client_encoding=UTF8, DateStyle=ISO, extra_float_digits=2,
> TimeZone=Europe/Madrid)
> 14:20:59.038 (2) <=BE AuthenticationOk
> 14:20:59.039 (2) <=BE ParameterStatus(application_name = )
> 14:20:59.039 (2) <=BE ParameterStatus(client_encoding = UTF8)
> 14:20:59.039 (2) <=BE ParameterStatus(DateStyle = ISO, DMY)
> 14:20:59.039 (2) <=BE ParameterStatus(integer_datetimes = on)
> 14:20:59.039 (2) <=BE ParameterStatus(IntervalStyle = postgres)
> 14:20:59.039 (2) <=BE ParameterStatus(is_superuser = on)
> 14:20:59.039 (2) <=BE ParameterStatus(server_encoding = UTF8)
> 14:20:59.039 (2) <=BE ParameterStatus(server_version = 9.3.5)
> 14:20:59.039 (2) <=BE ParameterStatus(session_authorization = tad)
> 14:20:59.039 (2) <=BE ParameterStatus(standard_conforming_strings = on)
> 14:20:59.039 (2) <=BE ParameterStatus(TimeZone = Europe/Madrid)
> 14:20:59.039 (2) <=BE BackendKeyData(pid=28271,ckey=447213844)
> 14:20:59.040 (2) <=BE ReadyForQuery(I)
> 14:20:59.040 (2) simple execute,
> handler=org(dot)postgresql(dot)core(dot)SetupQueryRunner$SimpleResultHandler(at)1118efc0,
> maxRows=0, fetchSize=0, flags=23
> 14:20:59.040 (2) FE=> Parse(stmt=null,query="SET extra_float_digits =
> 3",oids={})
> 14:20:59.040 (2) FE=> Bind(stmt=null,portal=null)
> 14:20:59.040 (2) FE=> Execute(portal=null,limit=1)
> 14:20:59.040 (2) FE=> Sync
> 14:20:59.041 (2) <=BE ParseComplete [null]
> 14:20:59.041 (2) <=BE BindComplete [null]
> 14:20:59.041 (2) <=BE CommandStatus(SET)
> 14:20:59.041 (2) <=BE ReadyForQuery(I)
> 14:20:59.041 (2) compatible = 9.3
> 14:20:59.041 (2) loglevel = 2
> 14:20:59.041 (2) prepare threshold = 5
> 14:20:59.043 (2) types using binary send =
> INT8_ARRAY,TIMESTAMPTZ,FLOAT4_ARRAY,FLOAT8_ARRAY,UUID,TEXT_ARRAY,VARCHAR_ARRAY,BYTEA,TIME,FLOAT4,FLOAT8,INT2_ARRAY,TIMETZ,INT2,INT8,INT4,INT4_ARRAY,TIMESTAMP,POINT,BOX
> 14:20:59.044 (2) types using binary receive =
> INT8_ARRAY,TIMESTAMPTZ,FLOAT4_ARRAY,FLOAT8_ARRAY,UUID,TEXT_ARRAY,VARCHAR_ARRAY,BYTEA,TIME,DATE,FLOAT4,FLOAT8,INT2_ARRAY,TIMETZ,INT2,INT8,INT4,INT4_ARRAY,TIMESTAMP,POINT,BOX
> 14:20:59.044 (2) integer date/time = true
> 9.3
> 14:20:59.056 (2) simple execute,
> handler=org(dot)postgresql(dot)jdbc2(dot)AbstractJdbc2Statement$StatementResultHandler(at)216f6006,
> maxRows=0, fetchSize=0, flags=16
> 14:20:59.057 (2) FE=> Parse(stmt=S_1,query="SELECT proargnames FROM
> pg_proc where proname ='pg_cursor'",oids={})
> 14:20:59.057 (2) FE=> Bind(stmt=S_1,portal=null)
> 14:20:59.057 (2) FE=> Describe(portal=null)
> 14:20:59.057 (2) FE=> Execute(portal=null,limit=0)
> 14:20:59.057 (2) FE=> Sync
> 14:20:59.059 (2) <=BE ParseComplete [S_1]
> 14:20:59.059 (2) <=BE BindComplete [null]
> 14:20:59.060 (2) <=BE RowDescription(1)
> 14:20:59.060 (2) Field(,TEXT_ARRAY,65535,T)
> 14:20:59.060 (2) <=BE DataRow(len=66)
> 14:20:59.060 (2) <=BE CommandStatus(SELECT 1)
> 14:20:59.072 (2) <=BE ReadyForQuery(I)
> {name,statement,is_holdable,is_binary,is_scrollable,creation_time}
> 14:20:59.077 (2) simple execute,
> handler=org(dot)postgresql(dot)jdbc2(dot)AbstractJdbc2Statement$StatementResultHandler(at)3a5f2465,
> maxRows=0, fetchSize=0, flags=16
> 14:20:59.077 (2) FE=> Bind(stmt=S_1,portal=null)
> 14:20:59.077 (2) FE=> Execute(portal=null,limit=0)
> 14:20:59.077 (2) FE=> Sync
> 14:20:59.078 (2) <=BE BindComplete [null]
> 14:20:59.078 (2) <=BE DataRow(len=103)
> 14:20:59.078 (2) <=BE CommandStatus(SELECT 1)
> 14:20:59.078 (2) <=BE ReadyForQuery(I)
> null
>
>