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support json type

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This commit is contained in:
xj0
2022-02-08 14:58:13 +08:00
committed by LINxiansheng
parent 4b25bac8d0
commit e5f59ea074
241 changed files with 46116 additions and 749 deletions
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189
src/sql/engine/expr/ob_expr_json_merge_preserve.cpp Normal file
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/**
* 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 is for implementation of func json_merge_preserve
#define USING_LOG_PREFIX SQL_ENG
#include "ob_expr_json_merge_preserve.h"
#include "sql/engine/expr/ob_expr_json_func_helper.h"
using namespace oceanbase::common;
using namespace oceanbase::sql;
namespace oceanbase
{
namespace sql
{
ObExprJsonMergePreserve::ObExprJsonMergePreserve(ObIAllocator &alloc)
: ObFuncExprOperator(alloc,
T_FUN_SYS_JSON_MERGE_PRESERVE,
N_JSON_MERGE_PRESERVE,
MORE_THAN_ONE,
NOT_ROW_DIMENSION)
{
}
ObExprJsonMergePreserve::ObExprJsonMergePreserve(
ObIAllocator &alloc,
ObExprOperatorType type,
const char *name,
int32_t param_num,
int32_t dimension) : ObFuncExprOperator(alloc, type, name, param_num, dimension)
{
;
}
ObExprJsonMergePreserve::~ObExprJsonMergePreserve()
{
}
int ObExprJsonMergePreserve::calc_result_typeN(ObExprResType& type,
ObExprResType* types_stack,
int64_t param_num,
ObExprTypeCtx& type_ctx) const
{
UNUSED(type_ctx);
INIT_SUCC(ret);
type.set_json();
bool is_result_null = false;
for (int64_t i = 0; OB_SUCC(ret) && !is_result_null && i < param_num; i++) {
if (types_stack[0].get_type() == ObNullType) {
is_result_null = true;
} else if (OB_FAIL(ObJsonExprHelper::is_valid_for_json(types_stack, i, N_JSON_MERGE_PRESERVE))) {
LOG_WARN("wrong type for json doc.", K(ret), K(types_stack[i].get_type()));
}
}
return ret;
}
int ObExprJsonMergePreserve::calc_resultN(ObObj &result, const ObObj *objs, int64_t param_num, ObExprCtx &expr_ctx) const
{
INIT_SUCC(ret);
ObIAllocator *allocator = expr_ctx.calc_buf_;
if (result_type_.get_collation_type() != CS_TYPE_UTF8MB4_BIN) {
ret = OB_ERR_INVALID_JSON_CHARSET;
LOG_WARN("invalid out put charset", K(ret), K(result_type_));
} if (OB_ISNULL(allocator)) { // check allocator
ret = OB_NOT_INIT;
LOG_WARN("allcator not init", K(ret));
} else {
ObIJsonBase *j_base = NULL;
ObIJsonBase *j_patch_node = NULL;
bool has_null = false;
for (int32 i = 0; OB_SUCC(ret) && i < param_num && !has_null; i++) {
if (OB_FAIL(ObJsonExprHelper::get_json_doc(objs, allocator, i, j_patch_node, has_null))) {
LOG_WARN("get_json_doc failed", K(ret));
} else if (has_null) {
// do nothing
} else {
if (i == 0) {
j_base = j_patch_node;
} else {
ObIJsonBase *j_res = NULL;
if (OB_FAIL(j_base->merge_tree(allocator, j_patch_node, j_res))) {
LOG_WARN("error, merge tree failed", K(ret), K(i));
} else {
j_base = j_res;
}
}
}
}
if (OB_SUCC(ret)) {
ObString raw_bin;
if (has_null) {
result.set_null();
} else if (OB_FAIL(j_base->get_raw_binary(raw_bin, allocator))) {
LOG_WARN("fail to get json raw binary", K(ret));
} else {
uint64_t length = raw_bin.length();
char *buf = reinterpret_cast<char *>(allocator->alloc(length));
if (OB_ISNULL(buf)) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_WARN("fail to alloc memory for json merge result", K(ret), K(length));
} else {
MEMMOVE(buf, raw_bin.ptr(), length);
result.set_collation_type(CS_TYPE_UTF8MB4_BIN);
result.set_string(ObJsonType, buf, length);
}
}
}
}
return ret;
}
int ObExprJsonMergePreserve::eval_json_merge_preserve(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
{
INIT_SUCC(ret);
ObDatum *json_datum = NULL;
common::ObArenaAllocator &temp_allocator = ctx.get_reset_tmp_alloc();
ObIJsonBase *j_base = NULL;
ObIJsonBase *j_patch_node = NULL;
bool has_null = false;
if (expr.datum_meta_.cs_type_ != CS_TYPE_UTF8MB4_BIN) {
ret = OB_ERR_INVALID_JSON_CHARSET;
LOG_WARN("invalid out put charset", K(ret), K(expr.datum_meta_.cs_type_));
}
for (int32 i = 0; OB_SUCC(ret) && i < expr.arg_cnt_ && !has_null; i++) {
if (OB_FAIL(ObJsonExprHelper::get_json_doc(expr, ctx, temp_allocator, i, j_patch_node, has_null))) {
LOG_WARN("get_json_doc failed", K(ret));
} else if (has_null) {
// do nothing
} else {
if (i == 0) {
j_base = j_patch_node;
} else {
ObIJsonBase *j_res = NULL;
if (OB_FAIL(j_base->merge_tree(&temp_allocator, j_patch_node, j_res))) {
LOG_WARN("error, merge tree failed", K(ret), K(i));
} else {
j_base = j_res;
}
}
}
}
if (OB_SUCC(ret)) {
ObString raw_bin;
if (has_null) {
res.set_null();
} else if (OB_FAIL(j_base->get_raw_binary(raw_bin, &temp_allocator))) {
LOG_WARN("failed: get json raw binary", K(ret));
} else {
uint64_t length = raw_bin.length();
char *buf = expr.get_str_res_mem(ctx, length);
if (buf) {
MEMCPY(buf, raw_bin.ptr(), length);
res.set_string(buf, length);
} else {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_WARN("failed: allocate res string buffer.", K(ret), K(length));
}
}
}
return ret;
}
int ObExprJsonMergePreserve::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_merge_preserve;
return OB_SUCCESS;
}
}
}