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* Added new functions, in EWH and CMS, needed for optimizer's cardinality estimation logic.
* Added new functions needed for range predicates in equi-width histogram.
commit_hash:bf5522da92ae356b3f424debda4d6a5b9aff4114
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Improved estimating functions of equi-width histograms.
Also, made StaticSize function public which is necessary to be used in building statistics.
commit_hash:346729e9c7ba8717e0ba5559d69889947edf782e
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commit_hash:83ce051ac7e1aa8ea634b2bc3812778187ccbcce
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commit_hash:a6b640bc576263b62884a0b4187ba79c893e13d9
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commit_hash:12dbda4defcaef8dd708a69552fc19eba832ce2f
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commit_hash:af5d81d51befa5cee331fbed69e7e5db2014a260
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This patch add equal width histogram
for use in assessing predicate selectivity for CBO.
commit_hash:8d2d3a7f89fb9b2261af1b6ba201e8d2a8b098b7
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commit_hash:fea91617ec8dca2a32ca3abb002f6a52fea14dd7
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init
commit_hash:7d4c435602078407bbf20dd3c32f9c90d2bbcbc0
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