Hello!
I have a table in MariaDB with a BLOB column to store documents and images.
The INSERT command works perfectly but when I try to SELECT the table rows, I take the following error:
I've read many related threads here in community but nothing works.
The data type I use for BLOB is LONGBLOB. I changed it to MEDIUMBLOB but the problem still persists!
I tried to exclude the BLOB column from my SELECT statement but the problem is still here!
Note that the BLOB data stored in database is valid, because I can save the data as image, via MariaDB procedures.
All table IDs are INT datatype and not BIGINT.
UPDATE:
The error occurs even if I remove the BLOB column! And this table is the only one in my application that causes a problem when retrieving data!
The structure of my table is an ordinary table structure as:
I have a table in MariaDB with a BLOB column to store documents and images.
The INSERT command works perfectly but when I try to SELECT the table rows, I take the following error:
B4X:
java.lang.RuntimeException: java.io.EOFException
at anywheresoftware.b4a.randomaccessfile.B4XSerializator.readType(B4XSerializator.java:314)
at anywheresoftware.b4a.randomaccessfile.B4XSerializator.readObject(B4XSerializator.java:374)
at anywheresoftware.b4a.randomaccessfile.B4XSerializator.ReadObject(B4XSerializator.java:129)
at anywheresoftware.b4a.randomaccessfile.B4XSerializator.ConvertBytesToObject(B4XSerializator.java:99)
at anywheresoftware.b4a.randomaccessfile.B4XSerializator$2.call(B4XSerializator.java:110)
at anywheresoftware.b4a.randomaccessfile.B4XSerializator$2.call(B4XSerializator.java:1)
at anywheresoftware.b4a.BA$4.run(BA.java:292)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
at java.base/java.lang.Thread.run(Thread.java:832)
Caused by: java.io.EOFException
at java.base/java.io.DataInputStream.readByte(DataInputStream.java:271)
at anywheresoftware.b4a.randomaccessfile.B4XSerializator.readByte(B4XSerializator.java:150)
at anywheresoftware.b4a.randomaccessfile.B4XSerializator.readObject(B4XSerializator.java:318)
at anywheresoftware.b4a.randomaccessfile.B4XSerializator.readList(B4XSerializator.java:263)
at anywheresoftware.b4a.randomaccessfile.B4XSerializator.readObject(B4XSerializator.java:371)
at anywheresoftware.b4a.randomaccessfile.B4XSerializator.readList(B4XSerializator.java:263)
at anywheresoftware.b4a.randomaccessfile.B4XSerializator.readObject(B4XSerializator.java:362)
at anywheresoftware.b4a.randomaccessfile.B4XSerializator.readMap(B4XSerializator.java:248)
at anywheresoftware.b4a.randomaccessfile.B4XSerializator.readType(B4XSerializator.java:292)
... 11 more
Error reading response: (EOFException) java.io.EOFExceptionThe data type I use for BLOB is LONGBLOB. I changed it to MEDIUMBLOB but the problem still persists!
I tried to exclude the BLOB column from my SELECT statement but the problem is still here!
Note that the BLOB data stored in database is valid, because I can save the data as image, via MariaDB procedures.
All table IDs are INT datatype and not BIGINT.
UPDATE:
The error occurs even if I remove the BLOB column! And this table is the only one in my application that causes a problem when retrieving data!
The structure of my table is an ordinary table structure as:
B4X:
CREATE TABLE `m_files` (
`id` INT(11) UNSIGNED NOT NULL AUTO_INCREMENT,
`descr` VARCHAR(255) NULL DEFAULT '' COLLATE 'utf8mb4_general_ci',
`origin_path` VARCHAR(500) NOT NULL DEFAULT '' COLLATE 'utf8mb4_general_ci',
`doc_type` VARCHAR(5) NOT NULL DEFAULT '' COLLATE 'utf8mb4_general_ci',
`doc_data` LONGBLOB NOT NULL,
`insert_date` BIGINT(20) UNSIGNED NOT NULL DEFAULT '0',
`update_user` VARCHAR(30) NOT NULL DEFAULT 'AUTO' COLLATE 'utf8mb4_general_ci',
`update_date` TIMESTAMP,
PRIMARY KEY (`id`) USING BTREE,
UNIQUE INDEX `origin_path_idx` (`origin_path`) USING BTREE
)
COLLATE='utf8mb4_general_ci'
ENGINE=Aria
AUTO_INCREMENT=1
;
Last edited:
