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[FEAT MERGE] Lob SQL refactoring (Mem-LobLocator, expressions and dbms_lob adaptions)

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Co-authored-by: chaser-ch <chaser.ch@antgroup.com>
This commit is contained in:
obdev
2023-01-28 20:40:15 +08:00
committed by ob-robot
parent 4bb1033505
commit 3d4f554258
350 changed files with 19091 additions and 3918 deletions
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56
src/sql/engine/expr/ob_expr_replace.cpp
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@ -21,6 +21,7 @@
#include "share/object/ob_obj_cast.h"
#include "sql/session/ob_sql_session_info.h"
#include "sql/engine/expr/ob_expr_result_type_util.h"
#include "sql/engine/expr/ob_expr_lob_utils.h"
namespace oceanbase
{
@ -228,26 +229,57 @@ int ObExprReplace::eval_replace(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &exp
ObDatum *text = NULL;
ObDatum *from = NULL;
ObDatum *to = NULL;
bool is_clob = expr.args_[0]->datum_meta_.is_clob();
bool is_lob_res = ob_is_text_tc(expr.datum_meta_.type_);
if (OB_FAIL(expr.eval_param_value(ctx, text, from, to))) {
LOG_WARN("evaluate parameters failed", K(ret));
} else if (text->is_null()
|| (is_mysql && from->is_null())
|| (is_mysql && NULL != to && to->is_null())) {
expr_datum.set_null();
} else if (expr.args_[0]->datum_meta_.is_clob()
&& (0 == text->len_)) {
} else if (is_clob && (0 == text->len_)) {
expr_datum.set_datum(*text);
} else if (OB_FAIL(replace(res,
text->get_string(),
!from->is_null() ? from->get_string() : ObString(),
(NULL != to && !to->is_null()) ? to->get_string() : ObString(),
alloc))) {
LOG_WARN("do replace failed", K(ret));
} else {
if (res.empty() && !is_mysql && !expr.args_[0]->datum_meta_.is_clob()) {
expr_datum.set_null();
} else if (!is_lob_res) { // non text tc inputs
if (OB_FAIL(replace(res,
text->get_string(),
!from->is_null() ? from->get_string() : ObString(),
(NULL != to && !to->is_null()) ? to->get_string() : ObString(),
alloc))) {
LOG_WARN("do replace failed", K(ret));
} else {
expr_datum.set_string(res);
if (res.empty() && !is_mysql && !expr.args_[0]->datum_meta_.is_clob()) {
expr_datum.set_null();
} else {
expr_datum.set_string(res);
}
}
} else { // tc inputs
ObString text_data;
ObString to_data;
ObString from_data;
text_data = text->get_string();
from_data = from->get_string();
ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
common::ObArenaAllocator &temp_allocator = tmp_alloc_g.get_allocator();
if (OB_FAIL(ObTextStringHelper::read_real_string_data(temp_allocator, *text,
expr.args_[0]->datum_meta_, expr.args_[0]->obj_meta_.has_lob_header(), text_data))) {
LOG_WARN("failed to get string data", K(ret), K(expr.args_[0]->datum_meta_));
} else if (OB_FAIL(ObTextStringHelper::read_real_string_data(temp_allocator, *from,
expr.args_[1]->datum_meta_, expr.args_[1]->obj_meta_.has_lob_header(), from_data))) {
LOG_WARN("failed to get string data", K(ret), K(expr.args_[1]->datum_meta_));
} else if (NULL == to) {
to_data.reset();
} else if (OB_FALSE_IT(to_data = to->get_string())) {
} else if (OB_FAIL(ObTextStringHelper::read_real_string_data(temp_allocator, *to,
expr.args_[2]->datum_meta_, expr.args_[2]->obj_meta_.has_lob_header(), to_data))) {
LOG_WARN("failed to get string data", K(ret), K(expr.args_[2]->datum_meta_));
}
if (OB_SUCC(ret)) {
if (OB_FAIL(replace(res, text_data, from_data, to_data, temp_allocator))) {
LOG_WARN("do replace for lob resutl failed", K(ret), K(expr.datum_meta_.type_));
} else if (OB_FAIL(ObTextStringHelper::string_to_templob_result(expr, ctx, expr_datum, res))) {
LOG_WARN("set lob result failed", K(ret));
}
}
}
return ret;