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

Hi Dave,

Thanks for your prompt response.

It works fine as you suggest.

In any case, shouldn't I expect 1st time it executes when server side
prepared statement is not used to get the same result as subsequent
executions?

Regards

Asier

On Tue, Feb 3, 2015 at 2:50 PM, Dave Cramer <pg(at)fastcrypt(dot)com> wrote:

> 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
>>
>>
>