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Support starts_with (str, prefix) function (#2813)

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Support starts_with function
This commit is contained in:
Lishi
2020-01-21 14:09:08 +08:00
committed by HangyuanLiu
parent 7099fcf2d3
commit 89c7234c1c
7 changed files with 142 additions and 0 deletions
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10
be/src/exprs/string_functions.cpp
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@ -79,6 +79,16 @@ StringVal StringFunctions::right(
return substring(context, str, IntVal(pos), len);
}
BooleanVal StringFunctions::starts_with(
FunctionContext* context, const StringVal& str, const StringVal& prefix) {
if (str.is_null || prefix.is_null) {
return BooleanVal::null();
}
re2::StringPiece str_sp(reinterpret_cast<char*>(str.ptr), str.len);
re2::StringPiece prefix_sp(reinterpret_cast<char*>(prefix.ptr), prefix.len);
return BooleanVal(str_sp.starts_with(prefix_sp));
}
BooleanVal StringFunctions::ends_with(
FunctionContext* context, const StringVal& str, const StringVal& suffix) {
if (str.is_null || suffix.is_null) {