127 lines
4.4 KiB
C++
127 lines
4.4 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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* This file is for implementation of func json_pretty
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*/
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#define USING_LOG_PREFIX SQL_ENG
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#include "ob_expr_json_pretty.h"
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#include "sql/engine/expr/ob_expr_json_func_helper.h"
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using namespace oceanbase::common;
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using namespace oceanbase::sql;
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namespace oceanbase
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{
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namespace sql
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{
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ObExprJsonPretty::ObExprJsonPretty(ObIAllocator &alloc)
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:ObFuncExprOperator(alloc,
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T_FUN_SYS_JSON_PRETTY,
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N_JSON_PRETTY,
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1, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprJsonPretty::~ObExprJsonPretty()
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{
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}
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int ObExprJsonPretty::calc_result_type1(ObExprResType &type,
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ObExprResType &type1,
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common::ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx); // type_ctx session, collation, raw expr, oracle模式下可能需要从type_ctx来判断字符集
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INIT_SUCC(ret);
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type.set_type(ObLongTextType);
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type.set_collation_type(CS_TYPE_UTF8MB4_BIN);
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type.set_collation_level(CS_LEVEL_IMPLICIT);
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if (OB_FAIL(ObJsonExprHelper::is_valid_for_json(type1, 1, N_JSON_PRETTY))) {
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LOG_WARN("wrong type for json doc.", K(ret), K(type1.get_type()));
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}
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return ret;
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}
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int ObExprJsonPretty::calc(ObEvalCtx &ctx, const ObDatum &data, ObDatumMeta meta, bool has_lob_header,
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ObIAllocator *allocator, ObJsonBuffer &j_buf, bool &is_null)
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{
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INIT_SUCC(ret);
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ObObjType type = meta.type_;
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ObCollationType cs_type = meta.cs_type_;
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ObIJsonBase *j_base = NULL;
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ObJsonInType j_in_type = ObJsonExprHelper::get_json_internal_type(type);
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common::ObString j_str = data.get_string(); // json text or json binary
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if (OB_ISNULL(allocator)) { // check allocator
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ret = OB_NOT_INIT;
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LOG_WARN("allcator is null", K(ret));
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} else if (data.is_null() || type == ObNullType) {
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is_null = true;
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} else if (type != ObJsonType && !ob_is_string_type(type)) {
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ret = OB_ERR_INVALID_TYPE_FOR_JSON;
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LOG_USER_ERROR(OB_ERR_INVALID_TYPE_FOR_JSON, 1, "json_pretty");
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} else if (OB_FAIL(ObJsonExprHelper::ensure_collation(type, cs_type))) {
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LOG_WARN("fail to ensure collation", K(ret), K(type), K(cs_type));
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} else if (OB_FAIL(ObTextStringHelper::read_real_string_data(*allocator, data, meta, has_lob_header, j_str))) {
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LOG_WARN("fail to get real data.", K(ret), K(j_str));
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} else if (OB_FAIL(ObJsonBaseFactory::get_json_base(allocator, j_str, j_in_type,
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j_in_type, j_base))) {
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if (ret == OB_ERR_INVALID_JSON_TEXT) {
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ret = OB_ERR_INVALID_JSON_TEXT_IN_PARAM;
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}
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LOG_WARN("fail to get json base", K(ret), K(type), K(j_str), K(j_in_type));
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} else if (OB_FAIL(j_base->print(j_buf, true, true, 0))) {
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LOG_WARN("fail to print json", K(ret), K(type), K(j_str), K(j_in_type));
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}
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return ret;
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}
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// for new sql engine
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int ObExprJsonPretty::eval_json_pretty(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
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{
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INIT_SUCC(ret);
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ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
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common::ObArenaAllocator &tmp_allocator = tmp_alloc_g.get_allocator();
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ObExpr *arg = expr.args_[0];
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ObDatum *j_datum = NULL;
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ObJsonBuffer j_buf(&tmp_allocator);
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bool is_null = false;
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if (OB_FAIL(arg->eval(ctx, j_datum))) {
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ret = OB_ERR_INVALID_DATATYPE;
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LOG_WARN("error, eval json args datum failed", K(ret));
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} else if (OB_FAIL(calc(ctx, *j_datum, arg->datum_meta_, arg->obj_meta_.has_lob_header(), &tmp_allocator, j_buf, is_null))) {
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LOG_WARN("fail to calc json pretty result", K(ret), K(j_datum), K(arg->datum_meta_));
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} else if (is_null) {
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res.set_null();
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} else if (OB_FAIL(ObJsonExprHelper::pack_json_str_res(expr, ctx, res, j_buf))) {
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LOG_WARN("fail to pack json result", K(ret));
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}
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return ret;
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}
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int ObExprJsonPretty::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const
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{
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UNUSED(expr_cg_ctx);
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UNUSED(raw_expr);
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rt_expr.eval_func_ = eval_json_pretty;
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return OB_SUCCESS;
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}
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}
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}
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