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Row-filtering for other string ops

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Colin Dellow
2018-03-17 15:28:51 -04:00
parent 03a20a9432
commit a3af16eb54
4 changed files with 82 additions and 19 deletions
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18
parquet/parquet_filter.cc
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@@ -15,6 +15,22 @@ Constraint::Constraint(
this->doubleValue = doubleValue;
this->blobValue = blobValue;
if(type == Text)
if(type == Text) {
stringValue = std::string((char*)&blobValue[0], blobValue.size());
if(op == Like) {
// This permits more rowgroups than is strictly needed
// since it assumes an implicit wildcard. But it's
// simple to implement, so we'll go with it.
likeStringValue = stringValue;
size_t idx = likeStringValue.find_first_of("%");
if(idx != std::string::npos) {
likeStringValue = likeStringValue.substr(0, idx);
}
idx = likeStringValue.find_first_of("_");
if(idx != std::string::npos) {
likeStringValue = likeStringValue.substr(0, idx);
}
}
}
}