Arnab Karmakar has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/24474


Change subject: IMPALA-13870: Add operator<< for StringVal to prevent unsafe 
ptr usage
......................................................................

IMPALA-13870: Add operator<< for StringVal to prevent unsafe ptr usage

StringVal buffers are not null-terminated, but manual string
construction from ptr/len is error-prone. This change adds a
length-safe stream operator that handles NULL values and
non-terminated buffers correctly.

The operator uses ostream::write(ptr, len) to ensure only len bytes
are printed, never relying on null termination.

Testing:
- Added unit tests including special cases for NULL, empty,
  non-terminated, and embedded-null cases

Change-Id: I2dd226d69fee428b5b38bdbf84dc73de4293c81b
---
M be/src/exprs/aggregate-functions-test.cc
M be/src/exprs/ai-functions.cc
M be/src/exprs/anyval-util.h
M be/src/exprs/date-functions-ir.cc
M be/src/exprs/expr-test.cc
M be/src/exprs/like-predicate.cc
M be/src/exprs/timestamp-functions-ir.cc
M be/src/exprs/udf-builtins.cc
M be/src/udf/udf-debug.h
M be/src/udf/udf-test.cc
M be/src/udf/udf.h
M be/src/udf_samples/udf-sample.cc
12 files changed, 110 insertions(+), 43 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/74/24474/1
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I2dd226d69fee428b5b38bdbf84dc73de4293c81b
Gerrit-Change-Number: 24474
Gerrit-PatchSet: 1
Gerrit-Owner: Arnab Karmakar <[email protected]>

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