Hi all -

I apologize for all the emails, but I am banging on monetdb a lot lately.

Today I’ve run into a problem storing  a –1 in a “tinyint” column.  My java code writes bytes to a binary file.  This file will be loaded via binary bulk load into a “tinyint” column.  The values in this column range from –1 to 3.

I am writing the negative value to the byte file as below:

 byte missingData = (byte)-1;

  writer.writeByte(missingData);

The data loads correctly into monetdb, and I can print it:

sql>\d minusonetest

CREATE TABLE "sys"."minusonetest" (

"chr"         INTEGER,

"pos"         INTEGER,

"coelorachis" TINYINT

);

sql>

sql>select * from minusonetest where chr=2 limit 10;

+------+------+-------------+

| chr  | pos  | coelorachis |

+======+======+=============+

|    2 |    1 |          -1 |

|    2 |    2 |          -1 |

|    2 |    3 |          -1 |

|    2 |    4 |          -1 |

|    2 |    5 |          -1 |

|    2 |    6 |          -1 |

|    2 |    7 |          -1 |

|    2 |    8 |          -1 |

|    2 |    9 |          -1 |

|    2 |   10 |          -1 |

+------+------+-------------+

10 tuples (10.7s)

sql>

BUT, when I run the select statement below, it tosses me out of the DB and prints errors to the log file:

  select * from minusone test where chr=2 and coelorachis > -1;

The select fails for any value in the “coelorachis > x” clause above (i.e., > -1, > 0, > 1, etc)  

 

If I run the above select and have NOT written any negative numbers to the column, all is good.  It only fails if there are negative numbers stored in the tinyint column.

The merovingian.log file has these messages:

2016-05-25 12:47:23 ERR testDB[21730]: *** Error in `/usr/bin/mserver5': free(): invalid next size (fast): 0x00007fb0ac003920 ***

2016-05-25 12:47:23 ERR testDB[21730]: ======= Backtrace: =========

2016-05-25 12:47:23 ERR testDB[21730]: /lib64/libc.so.6(+0x7d023)[0x7fb0df3bc023]

2016-05-25 12:47:23 ERR testDB[21730]: /lib64/libbat.so.12(GDKfree+0x13)[0x7fb0e1b21233]

2016-05-25 12:47:23 ERR testDB[21730]: /lib64/libbat.so.12(BATsubunique+0x18a9)[0x7fb0e1d23f69]

2016-05-25 12:47:23 ERR testDB[21730]: /lib64/libbat.so.12(BATsubunique+0xbe7)[0x7fb0e1d232a7]

2016-05-25 12:47:23 ERR testDB[21730]: /lib64/libbat.so.12(BATimprints+0x581)[0x7fb0e1cef791]

2016-05-25 12:47:23 ERR testDB[21730]: /lib64/libbat.so.12(BATsubselect+0x4ecf)[0x7fb0e1ac532f]

2016-05-25 12:47:23 ERR testDB[21730]: /lib64/libbat.so.12(BATthetasubselect+0x14b)[0x7fb0e1ac78eb]

2016-05-25 12:47:23 ERR testDB[21730]: /lib64/libmonetdb5.so.19(ALGthetasubselect2+0x1c4)[0x7fb0e210db64]

2016-05-25 12:47:23 ERR testDB[21730]: /lib64/libmonetdb5.so.19(runMALsequence+0xdeb)[0x7fb0e20ac55b]

2016-05-25 12:47:23 ERR testDB[21730]: /lib64/libmonetdb5.so.19(+0x45e5b)[0x7fb0e20ade5b]

2016-05-25 12:47:23 ERR testDB[21730]: /lib64/libpthread.so.0(+0x7dc5)[0x7fb0df707dc5]

2016-05-25 12:47:23 ERR testDB[21730]: /lib64/libc.so.6(clone+0x6d)[0x7fb0df43528d]

2016-05-25 12:47:23 ERR testDB[21730]: ======= Memory map: ========

2016-05-25 12:47:23 ERR testDB[21730]: 00400000-00405000 r-xp 00000000 08:03 22036485                           /usr/bin/mserver5

2016-05-25 12:47:23 ERR testDB[21730]: 00604000-00605000 r--p 00004000 08:03 22036485                           /usr/bin/mserver5

2016-05-25 12:47:23 ERR testDB[21730]: 00605000-00606000 rw-p 00005000 08:03 22036485                           /usr/bin/mserver5

2016-05-25 12:47:23 ERR testDB[21730]: 00606000-00608000 rw-p 00000000 00:00 0

2016-05-25 12:47:23 ERR testDB[21730]: 00892000-01e3e000 rw-p 00000000 00:00 0                                  [heap]

2016-05-25 12:47:23 ERR testDB[21730]: 7fabab28a000-7fabab29f000 r-xp 00000000 08:03 22020111                   /usr/lib64/libgcc_s-4.8.3-20140911.so.1

2016-05-25 12:47:23 ERR testDB[21730]: 7fabab29f000-7fabab49e000 ---p 00015000 08:03 22020111                   /usr/lib64/libgcc_s-4.8.3-20140911.so.1

2016-05-25 12:47:23 ERR testDB[21730]: 7fabab49e000-7fabab49f000 r--p 00014000 08:03 22020111                   /usr/lib64/libgcc_s-4.8.3-20140911.so.1

2016-05-25 12:47:23 ERR testDB[21730]: 7fabab49f000-7fabab4a0000 rw-p 00015000 08:03 22020111                   /usr/lib64/libgcc_s-4.8.3-20140911.so.1

Any ideas?  There is no problem if I use Byte.MIN_VALUE instead of -1.  This translates to NULL and is selectable.

Lynn