Taras Bobrovytsky has uploaded a new change for review.
http://gerrit.cloudera.org:8080/7660
Change subject: IMPALA-2422: Fix escaping in LIKE clause
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IMPALA-2422: Fix escaping in LIKE clause
There are two stages to processing a like clause. First, we determine if
it is possible to convert the expression to a simpler function, such as
StartsWith() or EndsWith(). If not, then we use a Regex libarary to
compute the result.
There was a problem in the logic that determines if it is possible to
use a simpler function. It did not take into account escape characters.
For example, "abc\%" was incorrectly converted to StartsWith("abc\").
Testing:
-Added expr tests.
Change-Id: Iec0f5d99c855ea8d4fe1bcf28c05780ba315034b
---
M be/src/exprs/expr-test.cc
M be/src/exprs/like-predicate.cc
2 files changed, 28 insertions(+), 6 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/60/7660/1
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Gerrit-MessageType: newchange
Gerrit-Change-Id: Iec0f5d99c855ea8d4fe1bcf28c05780ba315034b
Gerrit-PatchSet: 1
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Taras Bobrovytsky <tbobrovyt...@cloudera.com>
