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author | Tom Lane <tgl@sss.pgh.pa.us> | 2004-03-07 05:43:53 +0000 |
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committer | Tom Lane <tgl@sss.pgh.pa.us> | 2004-03-07 05:43:53 +0000 |
commit | bc19d6641a1dbb6ce227b0fdd2de1635aa2bc91b (patch) | |
tree | 3edd6d11f251227a9f92252db11bf8dd9422dc64 /contrib/xml2/xpath.c | |
parent | 5ae38167cfe6abd632f9e4459320b63b67563122 (diff) | |
download | postgresql-bc19d6641a1dbb6ce227b0fdd2de1635aa2bc91b.tar.gz postgresql-bc19d6641a1dbb6ce227b0fdd2de1635aa2bc91b.zip |
When testing usability of a partial index, recognize that an index
predicate of the form 'foo IS NOT NULL' is implied by a WHERE clause
that uses 'foo' in any strict operator or function. Per suggestion
and preliminary implementation by John Siracusa; some further hacking
by moi.
Diffstat (limited to 'contrib/xml2/xpath.c')
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