[HIVE-3382] Strings truncated to length 334 when hive data is accessed through hive ODBC driver.

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.8.1
• Component/s: ODBC

Environment

Ubuntu Linux 10.04

• Assignee: Unassigned
• Reporter: Abhijeet Apsunde
• Created: 14/Aug/12 07:37
• Updated: 14/Aug/12 07:37

Description

I'm trying to fetch data from hive server using hive ODBC driver.

I observed that strings being fetched at application side are truncated to length 334, I further looked into the hiveclient code and found there are two variables which are hardcoded to “334”

./src/odbc/src/cpp/thriftserverconstants.h:static const int MAX_DISPLAY_SIZE = 334;
./src/odbc/src/cpp/thriftserverconstants.h:static const int MAX_BYTE_LENGTH = 334;

I tried finding usage of these variables and looks like MAX_BYTE_LENGTH is causing issue of string truncation.

abhi@vmabhihive:~/hhh/ts/hive-0.8.1$ find . -type f -name "*.h" | xargs grep "MAX_BYTE_LENGTH"
./src/odbc/src/cpp/HiveRowSet.h: /// Forces all data retrieved to be no more than MAX_BYTE_LENGTH
./src/odbc/src/cpp/HiveRowSet.h: char m_field_buffer[MAX_BYTE_LENGTH + 1];

Expected behavior : Strings should be read completely [or upto length of application specified buffer length] instead of getting truncated to length 334.