187 lines
6.6 KiB
C++
187 lines
6.6 KiB
C++
/**
|
|
* Copyright (c) 2021 OceanBase
|
|
* OceanBase CE is licensed under Mulan PubL v2.
|
|
* You can use this software according to the terms and conditions of the Mulan PubL v2.
|
|
* You may obtain a copy of Mulan PubL v2 at:
|
|
* http://license.coscl.org.cn/MulanPubL-2.0
|
|
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
|
|
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
|
|
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
|
|
* See the Mulan PubL v2 for more details.
|
|
* This file contains implementation for json_length.
|
|
*/
|
|
|
|
#define USING_LOG_PREFIX SQL_ENG
|
|
#include "deps/oblib/src/lib/json_type/ob_json_path.h"
|
|
#include "lib/json_type/ob_json_tree.h"
|
|
#include "ob_expr_json_length.h"
|
|
#include "sql/engine/expr/ob_expr_util.h"
|
|
#include "share/object/ob_obj_cast.h"
|
|
#include "objit/common/ob_item_type.h"
|
|
#include "sql/session/ob_sql_session_info.h"
|
|
#include "ob_expr_json_func_helper.h"
|
|
|
|
using namespace oceanbase::common;
|
|
using namespace oceanbase::sql;
|
|
|
|
namespace oceanbase
|
|
{
|
|
namespace sql
|
|
{
|
|
ObExprJsonLength::ObExprJsonLength(ObIAllocator &alloc)
|
|
: ObFuncExprOperator(alloc, T_FUN_SYS_JSON_LENGTH, N_JSON_LENGTH,
|
|
ONE_OR_TWO, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
|
|
{
|
|
}
|
|
|
|
ObExprJsonLength::~ObExprJsonLength()
|
|
{
|
|
}
|
|
|
|
int ObExprJsonLength::calc_result_typeN(ObExprResType& type,
|
|
ObExprResType* types_stack,
|
|
int64_t param_num,
|
|
ObExprTypeCtx& type_ctx) const
|
|
{
|
|
INIT_SUCC(ret);
|
|
UNUSED(type_ctx);
|
|
|
|
// set result type to int32
|
|
type.set_int32();
|
|
type.set_scale(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].scale_);
|
|
type.set_precision(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].precision_);
|
|
|
|
// 0 position is json doc
|
|
if (OB_FAIL(ObJsonExprHelper::is_valid_for_json(types_stack, 0, N_JSON_LENGTH))) {
|
|
LOG_WARN("wrong type for json doc.", K(ret), K(types_stack[0].get_type()));
|
|
} else if (param_num > 1 && OB_FAIL(ObJsonExprHelper::is_valid_for_path(types_stack, 1))) {
|
|
LOG_WARN("wrong type for json path.", K(ret), K(types_stack[1].get_type()));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ObExprJsonLength::calc(ObEvalCtx &ctx, const ObDatum &data1, ObDatumMeta meta1, bool has_lob_header1,
|
|
const ObDatum *data2, ObDatumMeta meta2, bool has_lob_header2,
|
|
ObIAllocator *allocator, ObDatum &res,
|
|
ObJsonPathCache* path_cache)
|
|
{
|
|
INIT_SUCC(ret);
|
|
bool is_null = false;
|
|
uint32_t res_len = 0;
|
|
ObIJsonBase *j_base = NULL;
|
|
ObObjType type1 = meta1.type_;
|
|
ObCollationType cs_type1 = meta1.cs_type_;
|
|
// handle data1(json text)
|
|
if (type1 == ObNullType || data1.is_null()) { // null should display "NULL"
|
|
is_null = true;
|
|
} else if (type1 != ObJsonType && !ob_is_string_type(type1)) {
|
|
ret = OB_ERR_INVALID_TYPE_FOR_OP;
|
|
LOG_WARN("input type error", K(type1));
|
|
} else if (OB_FAIL(ObJsonExprHelper::ensure_collation(type1, cs_type1))) {
|
|
LOG_WARN("fail to ensure collation", K(ret), K(type1), K(cs_type1));
|
|
} else {
|
|
ObString j_doc = data1.get_string();
|
|
ObJsonInType j_in_type = ObJsonExprHelper::get_json_internal_type(type1);
|
|
if (j_doc.length() == 0) {
|
|
ret = OB_ERR_INVALID_JSON_TEXT;
|
|
LOG_USER_ERROR(OB_ERR_INVALID_JSON_TEXT);
|
|
} else if (OB_FAIL(ObTextStringHelper::read_real_string_data(*allocator, data1, meta1, has_lob_header1, j_doc))) {
|
|
LOG_WARN("fail to get real data.", K(ret), K(j_doc));
|
|
} else if (OB_FAIL(ObJsonBaseFactory::get_json_base(allocator, j_doc, j_in_type,
|
|
j_in_type, j_base))) {
|
|
LOG_WARN("fail to get json base", K(ret), K(type1), K(j_doc), K(j_in_type));
|
|
}
|
|
}
|
|
|
|
// handle data2(path text)
|
|
if (OB_SUCC(ret) && OB_LIKELY(!is_null)) {
|
|
if (OB_ISNULL(data2)) { // have no path
|
|
res_len = j_base->element_count();
|
|
} else { // handle json path
|
|
ObObjType type2 = meta2.type_;
|
|
if (type2 == ObNullType) { // null should display "NULL"
|
|
is_null = true;
|
|
} else { // ObLongTextType
|
|
ObJsonBaseVector hit;
|
|
ObString j_path_text = data2->get_string();
|
|
ObJsonPath *j_path = NULL;
|
|
if (OB_FAIL(ObTextStringHelper::read_real_string_data(*allocator, *data2, meta2, has_lob_header2, j_path_text))) {
|
|
LOG_WARN("fail to get real data.", K(ret), K(j_path_text));
|
|
} else if (OB_FAIL(ObJsonExprHelper::find_and_add_cache(path_cache, j_path, j_path_text, 1, false))) {
|
|
LOG_USER_ERROR(OB_ERR_INVALID_JSON_PATH);
|
|
LOG_WARN("fail to parse json path", K(ret), K(type2), K(j_path_text));
|
|
} else if (OB_FAIL(j_base->seek(*j_path, j_path->path_node_cnt(), true, true, hit))) {
|
|
LOG_WARN("fail to seek json node", K(ret), K(j_path_text));
|
|
} else if (hit.size() != 1) { // not found node by path, display "NULL"
|
|
is_null = true;
|
|
} else {
|
|
res_len = hit[0]->element_count();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// set result
|
|
if (OB_SUCC(ret)) {
|
|
if (is_null) {
|
|
res.set_null();
|
|
} else {
|
|
res.set_int32(res_len);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
// for new sql engine
|
|
int ObExprJsonLength::eval_json_length(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
|
|
{
|
|
INIT_SUCC(ret);
|
|
ObDatum *datum1 = NULL;
|
|
ObDatumMeta meta1;
|
|
bool has_lob_header1 = false;
|
|
ObDatum *datum0 = NULL;
|
|
ObExpr *arg0 = expr.args_[0];
|
|
ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
|
|
common::ObArenaAllocator &tmp_allocator = tmp_alloc_g.get_allocator();
|
|
|
|
if (OB_FAIL(arg0->eval(ctx, datum0))) { // json doc
|
|
LOG_WARN("fail to eval json arg", K(ret), K(arg0->datum_meta_));
|
|
} else {
|
|
if (expr.arg_cnt_ > 1) { // json path
|
|
ObExpr *arg1 = expr.args_[1];
|
|
meta1 = arg1->datum_meta_;
|
|
has_lob_header1 = arg1->obj_meta_.has_lob_header();
|
|
if (OB_FAIL(arg1->eval(ctx, datum1))) {
|
|
LOG_WARN("fail to eval path arg", K(ret), K(meta1));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (OB_SUCC(ret)) {
|
|
ObJsonPathCache ctx_cache(&tmp_allocator);
|
|
ObJsonPathCache* path_cache = ObJsonExprHelper::get_path_cache_ctx(expr.expr_ctx_id_, &ctx.exec_ctx_);
|
|
path_cache = ((path_cache != NULL) ? path_cache : &ctx_cache);
|
|
|
|
if (OB_FAIL(calc(ctx, *datum0, arg0->datum_meta_, arg0->obj_meta_.has_lob_header(),
|
|
datum1, meta1, has_lob_header1, &tmp_allocator, res, path_cache))) {
|
|
LOG_WARN("fail to calc json length result", K(ret), K(datum0), K(expr.arg_cnt_));
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ObExprJsonLength::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
|
|
ObExpr &rt_expr) const
|
|
{
|
|
UNUSED(expr_cg_ctx);
|
|
UNUSED(raw_expr);
|
|
rt_expr.eval_func_ = eval_json_length;
|
|
return OB_SUCCESS;
|
|
}
|
|
|
|
|
|
}
|
|
} |