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File: [Pegasus] / pegasus / src / Pegasus / WQL / readme.txt (download)
Revision: 1.3, Mon Feb 14 23:22:47 2005 UTC (19 years, 4 months ago) by karl
Branch: MAIN
CVS Tags: STABLE, RELEASE_2_5_0-RC1, RELEASE_2_5_0, PEP244_ServerProfile-root, PEP244_ServerProfile-branch, PEP233_EmbeddedInstSupport-root, PEP214ROOT, PEP214BRANCH, PEP214-root, PEP214-branch, PEP-214B-root, PEGASUS_2_5_0_PerformanceDev-string-end, PEGASUS_2_5_0_PerformanceDev-rootlt, PEGASUS_2_5_0_PerformanceDev-root, PEGASUS_2_5_0_PerformanceDev-r2, PEGASUS_2_5_0_PerformanceDev-r1, PEGASUS_2_5_0_PerformanceDev-lit-end, PEGASUS_2_5_0_PerformanceDev-buffer-end, PEGASUS_2_5_0_PerformanceDev-branch, PEGASUS_2_5_0_PerformanceDev-AtomicInt-branch, PEG25_IBM_5_16_05, NPEGASUS_2_5_0_PerformanceDev-String-root, NNPEGASUS_2_5_0_PerformanceDev-String-branch, BUG_4225_PERFORMANCE_VERSION_1_DONE
Branch point for: PEP233_EmbeddedInstSupport-branch
Changes since 1.2: +16 -0 lines

BUG#: 2731
TITLE: Correct Compile Failure buiding WQLYACC.cpp on HP-UX

DESCRIPTION: the yacc output was putting in a pragma with
the file name changed from uppercase to lower case. This was
corrected by using a different version of bison/flex.  Note that
there were a number of other differences that showed up when
this was compiled with an up-to-date version of the utilities.
The resulting files pass the included parser tests.


This directory defines a library to be used to compile WQL1 query
statement (which may only contain a simple SELECT statement).

The main interface is in <Pegasus/WQL/WQLParser.h> which contains an
example.

See program under tests/Parser for an example.

To generate documentation under:

    <pegasus-root>/pegasus/doc/reference/Pegasus/WQL/index.html

Type "make docxx".

WARNING: Compiling the grammar.  The Makefile includes a section to
compile the grammar that is defined in WQL.l and WQL.y.  This Makefile
allows either lex and yacc or flex/bision tools to be used for the
compilation.  

However, we have noted a significant difference in the various versions
of bison and flex.  We recommend that anybody compiling the grammar for
WQL use an up-to-date version of lex/yacc or flex/bison.  In particular,
the versions generally available in windows have proven to be out of date
and created several questionable output structures.

This has been successfully compiled on current Linux platforms using
bison 1.87 and flex verison 2.5.4.

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