504 lines
18 KiB
C++
504 lines
18 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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*/
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#define USING_LOG_PREFIX SQL_ENG
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#include "sql/engine/sequence/ob_sequence_op.h"
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#include "lib/utility/utility.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "sql/engine/ob_physical_plan.h"
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#include "sql/engine/ob_exec_context.h"
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#include "sql/engine/dml/ob_link_op.h"
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namespace oceanbase
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{
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using namespace common;
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using namespace share;
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using namespace share::schema;
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using namespace common::sqlclient;
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namespace sql
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{
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OB_SERIALIZE_MEMBER((ObSequenceSpec, ObOpSpec), nextval_seq_ids_);
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ObSequenceSpec::ObSequenceSpec(ObIAllocator &alloc, const ObPhyOperatorType type)
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: ObOpSpec(alloc, type),
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nextval_seq_ids_(alloc)
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{
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}
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int ObSequenceSpec::add_uniq_nextval_sequence_id(uint64_t seq_id)
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{
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int ret = OB_SUCCESS;
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for (uint64_t i = 0; i < nextval_seq_ids_.count() && OB_SUCC(ret); ++i) {
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if (seq_id == nextval_seq_ids_.at(i)) {
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ret = OB_ENTRY_EXIST;
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LOG_WARN("should not add duplicated seq id to ObSequence operator",
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K(seq_id), K(ret));
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}
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}
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if (OB_SUCC(ret)) {
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if (OB_FAIL(nextval_seq_ids_.push_back(seq_id))) {
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LOG_WARN("fail add seq id to nextval seq id set", K(seq_id), K(ret));
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}
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}
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return ret;
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}
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ObLocalSequenceExecutor::ObLocalSequenceExecutor()
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:ObSequenceExecutor(),
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sequence_cache_(nullptr)
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{
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sequence_cache_ = &share::ObSequenceCache::get_instance();
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if (OB_ISNULL(sequence_cache_)) {
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LOG_ERROR_RET(OB_ALLOCATE_MEMORY_FAILED, "fail alloc memory for ObSequenceCache instance");
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}
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}
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ObLocalSequenceExecutor::~ObLocalSequenceExecutor()
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{
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destroy();
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}
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int ObLocalSequenceExecutor::init(ObExecContext &ctx)
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{
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int ret = OB_SUCCESS;
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ObTaskExecutorCtx *task_ctx = NULL;
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share::schema::ObMultiVersionSchemaService *schema_service = NULL;
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ObSQLSessionInfo *my_session = NULL;
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share::schema::ObSchemaGetterGuard schema_guard;
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if (OB_ISNULL(my_session = GET_MY_SESSION(ctx))) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("fail to get my session", K(ret));
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} else if (OB_ISNULL(task_ctx = GET_TASK_EXECUTOR_CTX(ctx))) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("task executor ctx is null", K(ret));
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} else if (OB_ISNULL(schema_service = task_ctx->schema_service_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("schema service is null", K(ret));
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} else if (OB_FAIL(schema_service->get_tenant_schema_guard(
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my_session->get_effective_tenant_id(),
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schema_guard))) {
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LOG_WARN("get schema guard failed", K(ret));
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} else {
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uint64_t tenant_id = my_session->get_effective_tenant_id();
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ARRAY_FOREACH_X(seq_ids_, idx, cnt, OB_SUCC(ret)) {
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const uint64_t seq_id = seq_ids_.at(idx);
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const ObSequenceSchema *seq_schema = nullptr;
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if (OB_FAIL(schema_guard.get_sequence_schema(
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tenant_id,
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seq_id,
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seq_schema))) {
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LOG_WARN("fail get sequence schema", K(seq_id), K(ret));
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} else if (OB_ISNULL(seq_schema)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("null unexpected", K(ret));
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} else if (OB_FAIL(seq_schemas_.push_back(*seq_schema))) {
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// 注意：这里将 schema 缓存到数组里，会自动深拷贝 sequence name
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// 即使 schema guard 释放，sequence name 的内存也还有效，直到请求结束
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LOG_WARN("cache seq_schema fail", K(tenant_id), K(seq_id), K(ret));
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}
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}
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}
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return ret;
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}
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void ObLocalSequenceExecutor::reset()
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{
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}
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void ObLocalSequenceExecutor::destroy()
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{
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sequence_cache_ = NULL;
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}
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int ObLocalSequenceExecutor::get_nextval(ObExecContext &ctx)
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{
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int ret = OB_SUCCESS;
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ObSQLSessionInfo *my_session = GET_MY_SESSION(ctx);
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if (seq_ids_.count() != seq_schemas_.count()) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("id count does not match schema count",
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"id_cnt", seq_ids_.count(),
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"schema_cnt", seq_schemas_.count(),
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K(ret));
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} else {
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uint64_t tenant_id = my_session->get_effective_tenant_id();
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ObArenaAllocator allocator; // nextval 临时计算内存
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// 当且仅当 select item 中有 nextval 时才需要去 cache 中更新 nextval
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// 否则直接取用 session 中的值
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ARRAY_FOREACH_X(seq_ids_, idx, cnt, OB_SUCC(ret)) {
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const uint64_t seq_id = seq_ids_.at(idx);
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// int64_t dummy_seq_value = 10240012435; // TODO: xiaochu, 设置 number 到 session 中
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ObSequenceValue seq_value;
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// 注意：这里 schema 的顺序和 ids 里面 id 的顺序是一一对应的
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// 所以可以直接用下标来寻址
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if (OB_FAIL(sequence_cache_->nextval(seq_schemas_.at(idx),
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allocator,
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seq_value))) {
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LOG_WARN("fail get nextval for seq", K(tenant_id), K(seq_id), K(ret));
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} else if (OB_FAIL(my_session->set_sequence_value(tenant_id, seq_id, seq_value))) {
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LOG_WARN("save seq_value to session as currval for later read fail",
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K(tenant_id), K(seq_id), K(seq_value), K(ret));
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}
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}
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}
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return ret;
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}
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ObRemoteSequenceExecutor::ObRemoteSequenceExecutor()
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:ObSequenceExecutor(),
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sessid_(0),
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link_type_(DBLINK_UNKNOWN),
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format_sql_(NULL),
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format_sql_length_(0),
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dblink_conn_(NULL)
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{
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}
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ObRemoteSequenceExecutor::~ObRemoteSequenceExecutor()
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{
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destroy();
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}
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int ObRemoteSequenceExecutor::init(ObExecContext &ctx)
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{
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int ret = OB_SUCCESS;
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ObSQLSessionInfo *my_session = NULL;
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if (OB_ISNULL(my_session = GET_MY_SESSION(ctx))) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("fail to get my session", K(ret));
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}
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ARRAY_FOREACH_X(seq_ids_, idx, cnt, OB_SUCC(ret)) {
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const uint64_t seq_id = seq_ids_.at(idx);
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const ObSequenceSchema *seq_schema = nullptr;
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if (OB_FAIL(my_session->get_dblink_sequence_schema(seq_id, seq_schema))) {
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LOG_WARN("failed to get dblink sequence schema", K(ret));
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} else if (OB_ISNULL(seq_schema)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("null unexpected", K(ret));
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} else if (OB_FAIL(seq_schemas_.push_back(*seq_schema))) {
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// 注意：这里将 schema 缓存到数组里，会自动深拷贝 sequence name
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// 即使 schema guard 释放，sequence name 的内存也还有效，直到请求结束
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LOG_WARN("cache seq_schema fail", K(seq_id), K(ret));
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}
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}
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if (OB_FAIL(ret)) {
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} else if (OB_FAIL(init_dblink_connection(ctx))) {
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LOG_WARN("failed to init dblink connection", K(ret));
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} else if (OB_FAIL(init_sequence_sql(ctx))) {
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LOG_WARN("failed to init sequence sql", K(ret));
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}
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return ret;
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}
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int ObRemoteSequenceExecutor::init_dblink_connection(ObExecContext &ctx)
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{
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int ret = OB_SUCCESS;
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ObSQLSessionInfo * my_session = ctx.get_my_session();
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common::sqlclient::ObISQLConnection *dblink_conn = NULL;
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ObPhysicalPlanCtx *plan_ctx = GET_PHY_PLAN_CTX(ctx);
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ObDbLinkProxy *dblink_proxy = GCTX.dblink_proxy_;
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const ObDbLinkSchema *dblink_schema = NULL;
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uint64_t tenant_id = OB_INVALID_ID;
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ObSchemaGetterGuard schema_guard;
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dblink_param_ctx param_ctx;
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if (OB_ISNULL(dblink_proxy)) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("dblink_proxy is NULL", K(ret));
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} else if (OB_ISNULL(my_session) || OB_ISNULL(plan_ctx)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("my_session or plan_ctx is NULL", K(my_session), K(plan_ctx), K(ret));
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} else if (FALSE_IT(sessid_ = my_session->get_sessid())) {
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} else if (FALSE_IT(tenant_id = my_session->get_effective_tenant_id())) {
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} else if (OB_FAIL(GCTX.schema_service_->get_tenant_schema_guard(tenant_id, schema_guard))) {
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LOG_WARN("failed to get schema guard", K(ret), K(tenant_id));
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} else if (OB_FAIL(schema_guard.get_dblink_schema(tenant_id, dblink_id_, dblink_schema))) {
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LOG_WARN("failed to get dblink schema", K(ret), K(tenant_id), K(dblink_id_));
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} else if (OB_ISNULL(dblink_schema)) {
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ret = OB_DBLINK_NOT_EXIST_TO_ACCESS;
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LOG_WARN("dblink schema is NULL", K(ret), K(dblink_id_));
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} else if (FALSE_IT(link_type_ = static_cast<DblinkDriverProto>(dblink_schema->get_driver_proto()))) {
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// do nothing
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} else if (OB_FAIL(ObLinkOp::init_dblink_param_ctx(ctx,
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param_ctx,
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link_type_,
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tenant_id,
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dblink_id_,
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sessid_,
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my_session->get_next_sql_request_level()))) {
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LOG_WARN("failed to init dblink param ctx", K(ret));
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} else if (OB_FAIL(dblink_proxy->create_dblink_pool(param_ctx,
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dblink_schema->get_host_addr(),
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dblink_schema->get_tenant_name(),
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dblink_schema->get_user_name(),
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dblink_schema->get_plain_password(),
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dblink_schema->get_database_name(),
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dblink_schema->get_conn_string(),
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dblink_schema->get_cluster_name()))) {
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LOG_WARN("failed to create dblink pool", K(ret));
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} else if (OB_FAIL(ObDblinkService::get_local_session_vars(my_session, ctx.get_allocator(), param_ctx))) {
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LOG_WARN("failed to get local session vars", K(ret));
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} else if (OB_FAIL(dblink_proxy->acquire_dblink(param_ctx,
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dblink_conn_))) {
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LOG_WARN("failed to acquire dblink", K(ret), K(dblink_id_));
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} else if (OB_FAIL(my_session->get_dblink_context().register_dblink_conn_pool(dblink_conn_->get_common_server_pool()))) {
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LOG_WARN("failed to register dblink conn pool to current session", K(ret));
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} else {
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LOG_TRACE("link op get connection from dblink pool", KP(dblink_conn_), K(lbt()));
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}
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return ret;
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}
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int ObRemoteSequenceExecutor::init_sequence_sql(ObExecContext &ctx)
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{
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int ret = OB_SUCCESS;
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ObSqlString sql;
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if (OB_FAIL(sql.append("SELECT "))) {
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LOG_WARN("failed to append string", K(ret));
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}
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for (uint64_t i = 0; OB_SUCC(ret) && i < seq_schemas_.count(); ++i) {
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//const ObSequenceSchema *seq_schema = nullptr;
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if (OB_FAIL(sql.append_fmt(" %.*s.NEXTVAL ",
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seq_schemas_.at(i).get_sequence_name().length(),
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seq_schemas_.at(i).get_sequence_name().ptr()))) {
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LOG_WARN("failed to append string", K(ret));
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} else if (i == seq_ids_.count() - 1) {
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//do nothing
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} else if (OB_FAIL(sql.append(", "))) {
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LOG_WARN("failed to append string", K(ret));
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}
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}
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if (OB_SUCC(ret)) {
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if (OB_FAIL(sql.append(" FROM DUAL"))) {
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LOG_WARN("failed to append string", K(ret));
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} else if (OB_FALSE_IT(format_sql_length_ = sql.length() + 1)) {
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} else if (OB_ISNULL(format_sql_ = static_cast<char*>(ctx.get_allocator().alloc(format_sql_length_)))) {
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ret = OB_ALLOCATE_MEMORY_FAILED;
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LOG_WARN("failed to alloc memory", K(ret));
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} else {
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MEMSET(format_sql_, 0, format_sql_length_);
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MEMCPY(format_sql_, sql.ptr(), sql.length());
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}
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}
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return ret;
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}
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void ObRemoteSequenceExecutor::reset()
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{
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}
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void ObRemoteSequenceExecutor::destroy()
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{
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int ret = OB_SUCCESS;
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#ifdef OB_BUILD_DBLINK
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if (DBLINK_DRV_OCI == link_type_ &&
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NULL != dblink_conn_ &&
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OB_FAIL(static_cast<ObOciConnection *>(dblink_conn_)->free_oci_stmt())) {
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LOG_WARN("failed to close oci result", K(ret));
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}
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#endif
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if (OB_NOT_NULL(GCTX.dblink_proxy_) &&
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OB_NOT_NULL(dblink_conn_) &&
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OB_FAIL(GCTX.dblink_proxy_->release_dblink(link_type_, dblink_conn_))) {
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LOG_WARN("failed to release connection", K(ret));
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}
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sessid_ = 0;
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dblink_conn_ = NULL;
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}
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int ObRemoteSequenceExecutor::rescan()
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{
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int ret = OB_SUCCESS;
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#ifdef OB_BUILD_DBLINK
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if (DBLINK_DRV_OCI == link_type_ &&
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NULL != dblink_conn_ &&
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OB_FAIL(static_cast<ObOciConnection *>(dblink_conn_)->free_oci_stmt())) {
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LOG_WARN("failed to close oci result", K(ret));
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}
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#endif
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return ret;
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}
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int ObRemoteSequenceExecutor::get_nextval(ObExecContext &ctx)
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{
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int ret = OB_SUCCESS;
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sqlclient::ObMySQLResult *result = NULL;
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ObSQLSessionInfo *my_session = GET_MY_SESSION(ctx);
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SMART_VAR(ObMySQLProxy::MySQLResult, res) {
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if (OB_FAIL(rescan())) {
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LOG_WARN("failed to rescan dblink reset", K(ret));
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} else if (OB_FAIL(GCTX.dblink_proxy_->dblink_read(dblink_conn_, res, format_sql_))) {
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LOG_WARN("read failed", K(ret), K(link_type_), K(dblink_conn_), K(format_sql_));
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} else if (OB_ISNULL(result = res.get_result())) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("failed to get result", K(ret));
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} else if (OB_FAIL(result->next())) {
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LOG_WARN("failed to get next val", K(ret));
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} else {
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uint64_t tenant_id = my_session->get_effective_tenant_id();
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for (int64_t i = 0; OB_SUCC(ret) && i < seq_ids_.count(); i++) {
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number::ObNumber num_val;
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ObSequenceValue seq_value;
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if (OB_FAIL(result->get_number(i, num_val, ctx.get_allocator()))) {
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LOG_WARN("failed to sequence val", K(ret));
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} else if (OB_FAIL(seq_value.set(num_val))) {
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LOG_WARN("failed to set value", K(ret));
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} else if (OB_FAIL(my_session->set_sequence_value(tenant_id, seq_ids_.at(i), seq_value))) {
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LOG_WARN("failed to set sequence value", K(ret));
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}
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}
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}
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}
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return ret;
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}
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ObSequenceOp::ObSequenceOp(ObExecContext &exec_ctx, const ObOpSpec &spec, ObOpInput *input)
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: ObOperator(exec_ctx, spec, input)
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{
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}
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ObSequenceOp::~ObSequenceOp()
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{
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}
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void ObSequenceOp::destroy()
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{
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for (int64_t i = 0; i < seq_executors_.count(); ++i) {
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seq_executors_.at(i)->destroy();
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}
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seq_executors_.reset();
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ObOperator::destroy();
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}
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int ObSequenceOp::inner_open()
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{
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int ret = OB_SUCCESS;
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ObSQLSessionInfo *my_session = NULL;
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if (OB_ISNULL(my_session = GET_MY_SESSION(ctx_))) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("fail to get my session", K(ret));
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} else if (OB_FAIL(init_op())) {
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LOG_WARN("initialize operator context failed", K(ret));
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} else if (get_child_cnt() > 1) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("should not have more than 1 child", K(ret));
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} else if (0 < MY_SPEC.filters_.count()) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("sequence operator should have no filter expr", K(ret));
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}
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ARRAY_FOREACH_X(MY_SPEC.nextval_seq_ids_, idx, cnt, OB_SUCC(ret)) {
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const uint64_t seq_id = MY_SPEC.nextval_seq_ids_.at(idx);
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const ObSequenceSchema *seq_schema = nullptr;
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uint64_t dblink_id = OB_INVALID_ID;
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ObSequenceExecutor *executor = NULL;
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if (OB_FAIL(my_session->get_dblink_sequence_schema(seq_id, seq_schema))) {
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LOG_WARN("failed to get dblink sequence schema", K(ret));
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} else if (NULL != seq_schema) {
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dblink_id = seq_schema->get_dblink_id();
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}
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for (int64_t i = 0; NULL==executor && OB_SUCC(ret) && i < seq_executors_.count(); ++i) {
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if (seq_executors_.at(i)->get_dblink_id() == dblink_id) {
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executor = seq_executors_.at(i);
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}
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}
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if (NULL != executor) {
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if (OB_FAIL(executor->add_sequence_id(seq_id))) {
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LOG_WARN("failed to add sequence id", K(ret));
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}
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} else if (OB_INVALID_ID == dblink_id) {
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//add local executor
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void *tmp = NULL;
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if (OB_ISNULL(tmp=ctx_.get_allocator().alloc(sizeof(ObLocalSequenceExecutor)))) {
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ret = OB_ALLOCATE_MEMORY_FAILED;
|
|
LOG_WARN("failed to alloc memory", K(ret));
|
|
} else {
|
|
executor = new(tmp) ObLocalSequenceExecutor();
|
|
executor->set_dblink_id(dblink_id);
|
|
if (OB_FAIL(executor->add_sequence_id(seq_id))) {
|
|
LOG_WARN("failed to add sequence id", K(ret));
|
|
} else if (OB_FAIL(seq_executors_.push_back(executor))) {
|
|
LOG_WARN("failed to push back executor", K(ret));
|
|
}
|
|
}
|
|
} else {
|
|
//add remote executor
|
|
void *tmp = NULL;
|
|
if (OB_ISNULL(tmp=ctx_.get_allocator().alloc(sizeof(ObRemoteSequenceExecutor)))) {
|
|
ret = OB_ALLOCATE_MEMORY_FAILED;
|
|
LOG_WARN("failed to alloc memory", K(ret));
|
|
} else {
|
|
executor = new(tmp) ObRemoteSequenceExecutor();
|
|
executor->set_dblink_id(dblink_id);
|
|
if (OB_FAIL(executor->add_sequence_id(seq_id))) {
|
|
LOG_WARN("failed to add sequence id", K(ret));
|
|
} else if (OB_FAIL(seq_executors_.push_back(executor))) {
|
|
LOG_WARN("failed to push back executor", K(ret));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
ARRAY_FOREACH_X(seq_executors_, idx, cnt, OB_SUCC(ret)) {
|
|
if (OB_FAIL(seq_executors_.at(idx)->init(ctx_))) {
|
|
LOG_WARN("failed to init executor", K(ret));
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ObSequenceOp::inner_close()
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
reset();
|
|
return ret;
|
|
}
|
|
|
|
int ObSequenceOp::init_op()
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
return ret;
|
|
}
|
|
|
|
int ObSequenceOp::inner_get_next_row()
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
if (OB_FAIL(try_get_next_row())) {
|
|
LOG_WARN_IGNORE_ITER_END(ret, "fail get next row", K(ret));
|
|
} else {
|
|
ARRAY_FOREACH_X(seq_executors_, idx, cnt, OB_SUCC(ret)) {
|
|
ObSequenceExecutor *executor = seq_executors_.at(idx);
|
|
if (OB_FAIL(executor->get_nextval(ctx_))) {
|
|
LOG_WARN("fail get nextval for seq", K(ret));
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ObSequenceOp::try_get_next_row()
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
clear_evaluated_flag();
|
|
if (get_child_cnt() == 0) {
|
|
// insert stmt, no child, give an empty row
|
|
// 这里是否要将所有ObExpr全部设置为null
|
|
} else if (OB_FAIL(child_->get_next_row())) {
|
|
LOG_WARN_IGNORE_ITER_END(ret, "fail get next row", K(ret));
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
} // namespace sql
|
|
} // namespace oceanbase
|