B4J Library [B4X] [B4XLib] SD_SQL (direct access to MySQL, MariaDB, MS SQL, FireBird)

Based on @Peter Simpson's code (here), I developed a library that allows you to connect directly to MySql, MsSql (for the moment) databases with B4A and B4J. To be clear, you don't need JRDC to connect to the database located on a server

(I am working on a version for b4i, but it is only obtainable with a wrap. it will take a long time because I have never written a line in objective-c).
SQL library already exists for B4J and it would not be necessary to create a new library. But to maintain compliance in writing the code I preferred to develop a B4XLib that works for both B4i and B4j


Being a B4XLib class, the code is perfectly reusable. It suffices on these two jar files jtds-1.3.1.jar and mysql-connector-java-5.1.47-bin.jar. (You can find these files in the @Peter Simpson thread or on the internet). With both B4A and B4J the jar files must be copied to the libreries folder.

To connect to the Firebird database read
post 26

It is not a wrap, it does not depend on the internal SQL library. It is written entirely in B4X

You can use it to access DataBases that allow direct access both in a local network and through the internet. you cannot access databases of external services that allow access only through PHP or ASP

NOTE: You can use this library for personal and commercial use. Include it in your projects.. Attention, even if it is a B4XLib library, it is not allowed to decompress it, modify it, change its name or redistribute it without the permission of the author

SD_SQL

Author:
Version:
0.03
  • SD_ResultSet
    • Functions:
      • Close
      • first As Boolean
      • GetBytes (ColumnName As String) As Byte()
        You can use it like GetBlob
      • GetBytes2 (index As Int) As Byte()
        You can use it like GetBlob
      • GetColumnName (index As Int) As String
      • GetDouble (ColumnName As String) As Double
      • GetDouble2 (index As Int) As Double
      • GetFloat (ColumnName As String) As Float
      • GetFloat2 (index As Int) As Float
      • GetInt (ColumnName As String) As Int
      • GetInt2 (index As Int) As Int
      • GetLong (ColumnName As String) As Long
      • GetLong2 (index As Int) As Long
      • GetRow As Int
      • GetShort (ColumnName As String) As Short
      • GetShort2 (index As Int) As Short
      • GetString (ColumnName As String) As String
      • GetString2 (index As Int) As String
      • Initialize (OriginalResultSet As JavaObject)
        Initializes the object. You can add parameters to this method if needed.
      • isClosed As Boolean
      • last As Boolean
      • NextRow As Boolean
      • PreviousRow As Boolean
      • relativeRow (row As Int) As Boolean
        is used to move the cursor to the relative row number in the ResultSet object, it may be positive or negative.
    • Properties:
      • ColumnCount As Int [read only]
  • SD_SQL
    • Events:
      • Ready (Success As Boolean)
    • Fields:
      • MyConnection As Object
    • Functions:
      • Close
      • ExecNonQuery (Statement As String)
      • ExecQuery (Query As String) As SD_ResultSet
        Return resultSet object
      • ExecQueryResutSet (Query As String) As Object
      • Initialize (CallBack As Object, Event As String, DriverClass As String, JDBCurl As String, DBUser As String, DBPassword As String)
        Initializes the object. You can add parameters to this method if needed.

Update 0.02
Add: GetRow, first, last, isClosed, GetShort, GetShort2​
Update 0.03
Add: PreviousRow, relativeRow​
 

Attachments

  • jSampleSQL.zip
    2.5 KB · Views: 721
  • aSampleSql.zip
    9.7 KB · Views: 771
  • SD_SQL.b4xlib
    2.7 KB · Views: 477
Last edited:

Star-Dust

Expert
Licensed User
Hi Star-Dust, here the log:

B4X:
Logger connesso a: 57U7N17915028375
--------- beginning of crash
--------- beginning of main
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
Call B4XPages.GetManager.LogEvents = True to enable logging B4XPages events.
** Activity (main) Resume **
Not connected: org.firebirdsql.jdbc.FBSQLException: GDS Exception. 335544721. Unable to complete network request to host "192.168.0.99".
I believe the error indicates that the server did not respond to that address / port.

If you do a Google search you see that it is often generated by the firewall or by wrong parameters. I can't help you much as you have to do some tests locally to understand the problem
 

Alex.G

Member
I believe the error indicates that the server did not respond to that address / port.

If you do a Google search you see that it is often generated by the firewall or by wrong parameters. I can't help you much as you have to do some tests locally to understand the problem
Why in debug mode it runs ok?
 

Star-Dust

Expert
Licensed User
Why in debug mode it runs ok?
I can't give you answers on everything, I don't have enough information I guess it could be a permissions issue.
The error indicates that there is no response from the server because it cannot be reached.

What version of Android do you have?
 

Alex.G

Member
I can't give you answers on everything, I don't have enough information I guess it could be a permissions issue.
The error indicates that there is no response from the server because it cannot be reached.

What version of Android do you have?
Thanks Star-Dust, I'm trying and retrying 'cause I've to understand and resolve this problem.

Tested on Android 6, 7 and 11, same result: Debug mode OK, Release mode connection error.
What's the difference between these two mode?
No one had matter this problem?

I can try with an android emulator on Windows, can you advise me one?
 

Star-Dust

Expert
Licensed User
I can't give you answers on everything, I don't have enough information I guess it could be a permissions issue.
As I wrote it could be a permission issue
 

MrKim

Well-Known Member
Licensed User
Longtime User
(I am working on a version for b4i, but it is only obtainable with a wrap. it will take a long time because I have never written a line in objective-c).
I don't know if you are still planning to do B4i, but if you are, I found this:


It would be great, then we would have a complete B4x solution for directly connecting to SQL server DBs.
 

Star-Dust

Expert
Licensed User
It was planned, but I failed several attempts.

Thanks for pointing me to a possible solution. I'll work on it as soon as possible, but I'm not sure I know enough objective-c to be able to port this code to B4x
 

MrKim

Well-Known Member
Licensed User
Longtime User
It was planned, but I failed several attempts.

Thanks for pointing me to a possible solution. I'll work on it as soon as possible, but I'm not sure I know enough objective-c to be able to port this code to B4x
It would be , then we would have a complete B4X solution. I have written a class that can use either direct or jrdc - pass the same request. Then I could complete the circle.
 
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