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[CP] fix like(nchar) bug

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This commit is contained in:
sdc
2023-06-01 03:47:55 +00:00
committed by ob-robot
parent ab45b51c6a
commit 9b7afa1d90
3 changed files with 22 additions and 13 deletions
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26
src/sql/engine/expr/ob_expr_like.cpp
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@ -208,16 +208,15 @@ int ObExprLike::check_pattern_valid(const T &pattern,
} else if (pre_char_is_escape) {
// If pre char is escape char, then the following char must be '_' or '%'
// Eg: select 1 from t1 where 'a' like 'a_a%' escape 'a'; -- it's ok
if (1 != char_len) {
ret = OB_ERR_INVALID_CHAR_FOLLOWING_ESCAPE_CHAR;
LOG_WARN("missing or illegal character following the escape character",
K(escape_val), K(pattern_val), K(ret));
} else if ('%' == *buf_start || '_' == *buf_start) {
ObString percent_str = ObCharsetUtils::get_const_str(coll_type, '%');
ObString underline_str = ObCharsetUtils::get_const_str(coll_type, '_');
const ObString pattern_char = ObString(char_len, buf_start);
if (0 == pattern_char.compare(percent_str) || 0 == pattern_char.compare(underline_str)) {
// it's ok
} else {
ret = OB_ERR_INVALID_CHAR_FOLLOWING_ESCAPE_CHAR;
LOG_WARN("missing or illegal character following the escape character",
K(escape_val), K(pattern_val), K(ret));
K(escape_val), K(pattern_val), K(pattern_char), K(ret));
}
pre_char_is_escape = false;
}
@ -361,6 +360,7 @@ int ObExprLike::set_instr_info(ObIAllocator *exec_allocator,
//when there are "_" or escape in pattern
//the case can not be optimized.
use_instr_mode = false;
// since cs_type is CS_TYPE_UTF8MB4_BIN, length of '%' must be 1.
} else if ((1 == char_len && '%' == *buf_start)) { //percent sign
percent_sign_exist = true;
if (OB_LIKELY(instr_len > 0)) {
@ -822,12 +822,16 @@ struct ObNonInstrModeMatcher
inline int64_t operator() (const ObCollationType coll_type,
const ObString &text_val,
const ObString &pattern_val,
int32_t escape_wc)
int32_t escape_wc,
int &ret)
{
int64_t res = 0;
if (OB_UNLIKELY(text_val.length() <= 0 && pattern_val.length() <= 0)) {
// empty string
res = 1;
} else if (OB_UNLIKELY(CS_TYPE_UTF8MB4_BIN != coll_type && escape_wc == static_cast<int32_t>('%'))) {
ret = OB_NOT_SUPPORTED;
LOG_USER_ERROR(OB_NOT_SUPPORTED, "escape %");
} else {
bool b = ObCharset::wildcmp(coll_type, text_val, pattern_val, escape_wc,
static_cast<int32_t>('_'), static_cast<int32_t>('%'));
@ -867,7 +871,7 @@ int ObExprLike::match_text_batch(BATCH_EVAL_FUNC_ARG_DECL,
res_datums[i].set_int(res);
} else {
res_datums[i].set_int(ObNonInstrModeMatcher()(coll_type, text_datums[i].get_string(),
pattern_val, escape_wc));
pattern_val, escape_wc, ret));
}
} else { // text tc
ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
@ -886,7 +890,7 @@ int ObExprLike::match_text_batch(BATCH_EVAL_FUNC_ARG_DECL,
res_datums[i].set_int(res);
} else {
res_datums[i].set_int(ObNonInstrModeMatcher()(coll_type, text_val,
pattern_val, escape_wc));
pattern_val, escape_wc, ret));
}
}
}
@ -909,7 +913,7 @@ int ObExprLike::match_text_batch(BATCH_EVAL_FUNC_ARG_DECL,
res_datums[i].set_int(res);
} else {
res_datums[i].set_int(ObNonInstrModeMatcher()(coll_type, text_datums[i].get_string(),
pattern_val, escape_wc));
pattern_val, escape_wc, ret));
}
} else { // text tc
ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
@ -929,7 +933,7 @@ int ObExprLike::match_text_batch(BATCH_EVAL_FUNC_ARG_DECL,
res_datums[i].set_int(res);
} else {
res_datums[i].set_int(ObNonInstrModeMatcher()(coll_type, text_val,
pattern_val, escape_wc));
pattern_val, escape_wc, ret));
}
}
}