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dbms: fixed error with LIKE [#METR-17078].

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This commit is contained in:
Alexey Milovidov 2015-06-29 21:47:46 +03:00
parent d23de31335
commit c1ed7ca004
3 changed files with 8 additions and 1 deletions
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7
dbms/include/DB/Functions/FunctionsStringSearch.h
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@ -447,10 +447,15 @@ struct MatchImpl
const char * str_data = reinterpret_cast<const char *>(&data[i != 0 ? offsets[i - 1] : 0]); const char * str_data = reinterpret_cast<const char *>(&data[i != 0 ? offsets[i - 1] : 0]);
size_t str_size = (i != 0 ? offsets[i] - offsets[i - 1] : offsets[0]) - 1; size_t str_size = (i != 0 ? offsets[i] - offsets[i - 1] : offsets[0]) - 1;
/** Даже в случае required_substring_is_prefix используем UNANCHORED проверку регекспа,
* чтобы он мог сматчиться, когда required_substring встречается в строке несколько раз,
* и на первом вхождении регексп не матчит.
*/
if (required_substring_is_prefix) if (required_substring_is_prefix)
res[i] = revert ^ regexp->getRE2()->Match( res[i] = revert ^ regexp->getRE2()->Match(
re2_st::StringPiece(str_data, str_size), re2_st::StringPiece(str_data, str_size),
reinterpret_cast<const char *>(pos) - str_data, str_size, re2_st::RE2::ANCHOR_START, nullptr, 0); reinterpret_cast<const char *>(pos) - str_data, str_size, re2_st::RE2::UNANCHORED, nullptr, 0);
else else
res[i] = revert ^ regexp->getRE2()->Match( res[i] = revert ^ regexp->getRE2()->Match(
re2_st::StringPiece(str_data, str_size), re2_st::StringPiece(str_data, str_size),

1
dbms/tests/queries/0_stateless/00187_like_regexp_prefix.reference Normal file
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@ -0,0 +1 @@
1

1
dbms/tests/queries/0_stateless/00187_like_regexp_prefix.sql Normal file
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@ -0,0 +1 @@
SELECT materialize('prepre_f') LIKE '%pre_f%';