hcq/oceanbase
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

support last_day in mysql mode

Browse Source
This commit is contained in:
jg0
2021-07-27 21:39:15 +08:00
committed by wangzelin.wzl
parent 09edba0ff6
commit 74d0236609
45 changed files with 26893 additions and 25079 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
src/sql/engine/expr/ob_expr_operator.cpp
View File

@ -3072,6 +3072,32 @@ int ObStringExprOperator::convert_result_collation(
return ret;
}
// for calc result type and length for function date_format and time_format.
void ObStringExprOperator::calc_temporal_format_result_length(
ObExprResType &type, const ObExprResType &format) const
{
const int64_t VARCHAR_RES_MAX_PARAM_LENGTH = 17;
const int64_t TEXT_RES_MAX_PARAM_LENGTH = 728;
const int64_t MAX_VARCHAR_BUFFER_SIZE = 256;
if (ob_is_string_tc(format.get_type())) {
// consistent with Mysql, result_length / format_length = 30
const int64_t ratio = 30;
if (format.get_length() <= VARCHAR_RES_MAX_PARAM_LENGTH) {
type.set_varchar();
type.set_length(format.get_length() * ratio);
} else if (format.get_length() < TEXT_RES_MAX_PARAM_LENGTH) {
type.set_type(ObTextType);
} else {
type.set_type(ObLongTextType);
}
} else if (ob_is_text_tc(format.get_type())) {
type.set_type(ObTinyTextType == format.get_type() ? ObTextType : ObLongTextType);
} else {
type.set_varchar();
type.set_length(MAX_VARCHAR_BUFFER_SIZE);
}
}
ObObjType ObStringExprOperator::get_result_type_mysql(int64_t char_length) const
{
/*