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https://issues.apache.org/jira/browse/PIG-123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12573572#action_12573572
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pi_song edited comment on PIG-123 at 2/28/08 6:45 PM:
------------------------------------------------------
Ben,
Pig is a processing-oriented system. You spend milliseconds to compile the
query but spend hours to do processing work. The real point to be optimized
should be in the execution engine where the code gets called over and over
millions of time. This change in frontend encoding should have extremely small
impact on the whole execution.
In terms of performance analysis, this is an O(n) operation on a short
in-memory string (normally no longer than 1K) which gets called only once in an
execution.
PS. If you do string scan first, it's still O(n) operation
was (Author: pi_song):
Ben,
Pig is a processing-oriented system. You spend milliseconds to compile the
query but spend hours to do processing work. The real point to be optimized
should be in the execution engine where the code gets called over and over
millions of time. This change in frontend encoding should have extremely small
impact on the whole execution.
In terms of performance analysis, this is an O(n) operation on a short
in-memory string (normally no longer than 1K) which gets called only once in an
execution.
> cannot escape single quotes in single quoted strings when using the eq or
> match operator
> ----------------------------------------------------------------------------------------
>
> Key: PIG-123
> URL: https://issues.apache.org/jira/browse/PIG-123
> Project: Pig
> Issue Type: Bug
> Reporter: andrei badulescu
> Attachments: PIG-123_escape_char.patch, pig_escape_patch1.patch
>
>
> a query like this :
> filter c by ( c.string eq 'hell\'s angels' OR c.string eq 'blue\'s clues')
> generates an error with the pig parser, because the parser does not allow
> single quotes (') within single quotes, even if they are escaped with a
> backslash.
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