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fix soundex calc result type not stable bug

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This commit is contained in:
sdc
2023-09-20 13:52:01 +00:00
committed by ob-robot
parent dcac08120c
commit 3c73bbd7c2
1 changed files with 23 additions and 3 deletions
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24
src/sql/engine/expr/ob_expr_soundex.cpp
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@ -40,6 +40,7 @@ int ObExprSoundex::calc_result_type1(
ObCollationType res_cs_type = CS_TYPE_INVALID;
int64_t res_length = OB_INVALID_SIZE;
const ObLengthSemantics res_len_semantics = LS_CHAR;
ObRawExpr *raw_expr = NULL;
if (OB_ISNULL(session = type_ctx.get_session())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("session is null", K(ret));
@ -58,12 +59,19 @@ int ObExprSoundex::calc_result_type1(
param_calc_cs_type = CS_TYPE_UTF8MB4_GENERAL_CI;
}
res_length = oracle_result_length;
} else if (OB_ISNULL(raw_expr = get_raw_expr())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("raw expr is null", K(ret));
} else {
if (type1.is_string_type()) {
if (type1.is_string_type() || type1.is_enum_or_set()) {
if (ObCharset::is_cs_nonascii(type1.get_collation_type())) {
param_calc_cs_type = CS_TYPE_UTF8MB4_GENERAL_CI;
}
if (type1.is_character_type()) {
if (type1.is_enum_or_set()) {
res_type = ObVarcharType;
res_length = MAX(MIN_RESULT_LENGTH, type1.get_length());
param_calc_type = ObVarcharType;
} else if (type1.is_character_type()) {
res_type = ObVarcharType;
// min length of result is 4.
res_length = MAX(MIN_RESULT_LENGTH, type1.get_length());
@ -74,7 +82,19 @@ int ObExprSoundex::calc_result_type1(
res_type = ObLongTextType;
res_length = OB_MAX_LONGTEXT_LENGTH;
}
if (0 == raw_expr->get_extra()) {
// calc result type for first time, record collation_type of original param.
res_cs_type = type1.get_collation_type();
raw_expr->set_extra(static_cast<uint64_t>(res_cs_type));
} else if (OB_UNLIKELY(raw_expr->get_extra() >= static_cast<uint64_t>(CS_TYPE_MAX))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected collationt type", K(ret), K(raw_expr->get_extra()));
} else {
// If collation_type of param is nonascii, implicit cast will be added above it to cast to utf8.
// To avoid set res_cs_type to utf8, which is different from the last one and makes calc_result_type unstable,
// we store the res_cs_type in raw_expr->extra_.
res_cs_type = static_cast<ObCollationType>(raw_expr->get_extra());
}
} else {
param_calc_type = ObVarcharType;
param_calc_cs_type = CS_TYPE_UTF8MB4_GENERAL_CI;