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sql_logical_plan.cpp
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sql_logical_plan.cpp
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#include "sql_logical_plan.h"
#include "sql_select_stmt.h"
#include "sql_delete_stmt.h"
#include "sql_insert_stmt.h"
#include "sql_update_stmt.h"
#include "parse_malloc.h"
namespace jdbd
{
namespace sql
{
using namespace jdbd::sql;
using namespace jdbd::common;
ObLogicalPlan::ObLogicalPlan()
{
question_marks_count_ = 0;
// from valid max id desc
new_gen_tid_ = UINT16_MAX - 2;
new_gen_cid_ = OB_MAX_TMP_COLUMN_ID;
new_gen_qid_ = 1;
new_gen_eid_ = 1;
}
ObLogicalPlan::~ObLogicalPlan()
{
for (uint32_t i = 0; i < stmts_.size(); ++i)
{
//delete stmts_[i];
stmts_[i]->~ObBasicStmt();
parse_free(stmts_[i]);
}
stmts_.clear();
for (uint32_t i = 0; i < exprs_.size(); ++i)
{
//delete exprs_[i];
exprs_[i]->~ObSqlRawExpr();
parse_free(exprs_[i]);
}
exprs_.clear();
for (uint32_t i = 0; i < raw_exprs_store_.size(); ++i)
{
if (raw_exprs_store_[i])
{
raw_exprs_store_[i]->~ObRawExpr();
parse_free(raw_exprs_store_[i]);
}
}
raw_exprs_store_.clear();
}
ObBasicStmt* ObLogicalPlan::get_query(uint64_t query_id) const
{
ObBasicStmt *stmt = NULL;
uint32_t num = stmts_.size();
for (uint32_t i = 0; i < num; i++)
{
if (stmts_[i]->get_query_id() == query_id)
{
stmt = stmts_[i];
break;
}
}
OB_ASSERT(NULL != stmt);
return stmt;
}
ObSelectStmt* ObLogicalPlan::get_select_query(uint64_t query_id) const
{
ObSelectStmt *select_stmt = NULL;
uint32_t num = stmts_.size();
for (uint32_t i = 0; i < num; i++)
{
if (stmts_[i]->get_query_id() == query_id)
{
select_stmt = static_cast<ObSelectStmt*> (stmts_[i]);
break;
}
}
OB_ASSERT(NULL != select_stmt);
return select_stmt;
}
ObSqlRawExpr* ObLogicalPlan::get_expr(uint64_t expr_id) const
{
ObSqlRawExpr *expr = NULL;
uint32_t num = exprs_.size();
for (uint32_t i = 0; i < num; i++)
{
if (exprs_[i]->get_expr_id() == expr_id)
{
expr = exprs_[i];
break;
}
}
OB_ASSERT(NULL != expr);
return expr;
}
#if 0
int ObLogicalPlan::fill_result_set(ObResultSet& result_set, ObSQLSessionInfo* session_info, common::StackAllocator &alloc)
{
int ret = OB_SUCCESS;
result_set.set_affected_rows(0);
result_set.set_warning_count(0);
result_set.set_message("");
ObSelectStmt *select_stmt = NULL;
ObResultSet::Field field;
switch (stmts_[0]->get_stmt_type())
{
case ObStmt::T_PREPARE:
{
ObPrepareStmt *prepare_stmt = static_cast<ObPrepareStmt*> (stmts_[0]);
ObBasicStmt *stmt = get_query(prepare_stmt->get_prepare_query_id());
if (stmt == NULL)
{
ret = OB_ERR_ILLEGAL_ID;
jlog(WARN, "wrong prepared query id, id = %lu, ret = %d", prepare_stmt->get_prepare_query_id(), ret);
break;
}
// only select prepare statement need to fill result set
else if (stmt->get_stmt_type() != ObBasicStmt::T_SELECT)
{
break;
}
else
{
select_stmt = static_cast<ObSelectStmt*> (stmt);
/* then get through */
}
}
case ObStmt::T_SELECT:
{
if (stmts_[0]->get_stmt_type() == ObBasicStmt::T_SELECT)
select_stmt = static_cast<ObSelectStmt*> (stmts_[0]);
if (select_stmt == NULL)
{
ret = OB_ERR_PARSE_SQL;
jlog(WARN, "logical plan of select statement error");
break;
}
uint32_t size = select_stmt->get_select_item_size();
for (uint32_t i = 0; ret == OB_SUCCESS && i < size; i++)
{
const SelectItem& select_item = select_stmt->get_select_item(i);
if ((ret = ob_write_string(select_item.expr_name_, field.cname_)) != OB_SUCCESS)
{
jlog(WARN, "fail to alloc string[%.*s] ret=%d", select_item.expr_name_.size(), select_item.expr_name_.data(), ret);
break;
}
ObSqlRawExpr* sql_expr = get_expr(select_item.expr_id_);
if (sql_expr == NULL)
{
jlog(WARN, "fail to get expr. select_item.expr_id_=%lu", select_item.expr_id_);
ret = OB_ERR_ILLEGAL_ID;
break;
}
field.type_.set_type(sql_expr->get_result_type());
ObRawExpr* expr = sql_expr->get_expr();
if (select_stmt->get_set_op() != ObSelectStmt::NONE)
{
if ((ret = ob_write_string(select_item.expr_name_, field.org_cname_)) != OB_SUCCESS)
{
jlog(WARN, "fail to alloc string[%.*s] ret=%d", select_item.expr_name_.size(), select_item.expr_name_.data(), ret);
break;
}
}
else if (expr->get_expr_type() == T_REF_COLUMN)
{
ObBinaryRefRawExpr *column_expr = static_cast<ObBinaryRefRawExpr*> (expr);
uint64_t table_id = column_expr->get_first_ref_id();
uint64_t column_id = column_expr->get_second_ref_id();
if (table_id != OB_INVALID_ID)
{
ColumnItem *column_item = select_stmt->get_column_item_by_id(table_id, column_id);
if (column_item == NULL)
{
jlog(WARN, "fail to get column item by id. table_id=%lu column_id=%lu", table_id, column_id);
ret = OB_ERR_ILLEGAL_ID;
break;
}
if (OB_SUCCESS != (ret = ob_write_string(column_item->column_name_, field.org_cname_)))
{
jlog(WARN, "fail to alloc string[%.*s] ret=%d", column_item->column_name_.size(), column_item->column_name_.data(), ret);
break;
}
TableItem *table_item = select_stmt->get_table_item_by_id(table_id);
if (table_item == NULL)
{
jlog(WARN, "fail to get table item by id. table_id=%lu", table_id);
ret = OB_ERR_ILLEGAL_ID;
break;
}
if (table_item->alias_name_.size() > 0)
{
if (OB_SUCCESS != (ret = ob_write_string(table_item->alias_name_, field.tname_)))
{
jlog(WARN, "fail to alloc string[%.*s] ret=%d", table_item->alias_name_.size(), table_item->alias_name_.data(), ret);
break;
}
}
else
{
if (OB_SUCCESS != (ret = ob_write_string(table_item->table_name_, field.tname_)))
{
jlog(WARN, "fail to alloc string[%.*s] ret=%d", table_item->table_name_.size(), table_item->table_name_.data(), ret);
break;
}
}
if (OB_SUCCESS != (ret = ob_write_string(table_item->table_name_, field.org_tname_)))
{
jlog(WARN, "fail to alloc string[%.*s] ret=%d", table_item->table_name_.size(), table_item->table_name_.data(), ret);
break;
}
}
}
if (OB_SUCCESS != (ret = result_set.add_field_column(field)))
{
jlog(WARN, "fail to add field column to result_set. ret=%d", ret);
break;
}
field.cname_.assign("");
field.org_cname_.assign("");
field.tname_.assign("");
field.org_tname_.assign("");
field.type_.set_type(ObMinType);
}
break;
}
case ObStmt::T_EXPLAIN:
{
ObString tname = ObString::make_string("explain_table");
ObString cname = ObString::make_string("Query Plan");
field.tname_ = tname;
field.org_tname_ = tname;
field.cname_ = cname;
field.org_cname_ = cname;
field.type_.set_type(ObVarcharType);
if (OB_SUCCESS != (ret = result_set.add_field_column(field)))
{
jlog(WARN, "fail to add field column to result_set. ret=%d", ret);
break;
}
break;
}
case ObStmt::T_SHOW_TABLES:
case ObStmt::T_SHOW_VARIABLES:
case ObStmt::T_SHOW_COLUMNS:
case ObStmt::T_SHOW_SCHEMA:
case ObStmt::T_SHOW_CREATE_TABLE:
case ObStmt::T_SHOW_TABLE_STATUS:
case ObStmt::T_SHOW_SERVER_STATUS:
case ObStmt::T_SHOW_PARAMETERS:
{
ObShowStmt *show_stmt = static_cast<ObShowStmt*> (stmts_[0]);
if (show_stmt == NULL)
{
jlog(WARN, "fail to get Show statement");
ret = OB_ERR_PARSE_SQL;
break;
}
TableItem *table_item = show_stmt->get_table_item_by_id(show_stmt->get_sys_table_id());
if (table_item == NULL)
{
jlog(WARN, "fail to get table item by id. table_id=%lu", show_stmt->get_sys_table_id());
ret = OB_ERR_ILLEGAL_ID;
break;
}
ObString tname;
if (OB_SUCCESS != (ret = ob_write_string(table_item->table_name_, tname)))
{
jlog(WARN, "fail to alloc string \"%.*s\" ret=%d", table_item->table_name_.size(), table_item->table_name_.data(), ret);
break;
}
field.tname_ = tname;
field.org_tname_ = tname;
for (uint32_t i = 0; ret == OB_SUCCESS && i < show_stmt->get_column_size(); i++)
{
ObString cname;
const ColumnItem *col_item = show_stmt->get_column_item(i);
if (col_item != NULL)
{
if (OB_SUCCESS != (ret = ob_write_string(col_item->column_name_, cname)))
{
jlog(WARN, "fail to alloc string \"%.*s\" ret=%d", col_item->column_name_.size(), col_item->column_name_.data(), ret);
break;
}
field.cname_ = cname;
field.org_cname_ = cname;
field.type_.set_type(col_item->data_type_);
if (OB_SUCCESS != (ret = result_set.add_field_column(field)))
{
jlog(WARN, "fail to add field column to result_set. ret=%d", ret);
break;
}
field.cname_.assign("");
field.org_cname_.assign("");
field.type_.set_type(ObMinType);
}
}
break;
}
case ObStmt::T_SHOW_WARNINGS:
{
ObString tname = ObString::make_string("show warnings");
ObShowStmt *show_stmt = static_cast<ObShowStmt*> (stmts_[0]);
if (show_stmt == NULL)
{
jlog(WARN, "fail to get Show statement");
ret = OB_ERR_PARSE_SQL;
break;
}
else
{
field.tname_ = tname;
field.org_tname_ = tname;
}
if (show_stmt->is_count_warnings())
{
ObString cname = ObString::make_string("warning_count");
field.cname_ = cname;
field.org_cname_ = cname;
field.type_.set_type(ObIntType);
if (OB_SUCCESS != (ret = result_set.add_field_column(field)))
{
jlog(WARN, "fail to add field column to result_set. ret=%d", ret);
break;
}
}
else
{
ObString cname[3];
cname[0] = ObString::make_string("level");
cname[1] = ObString::make_string("code");
cname[2] = ObString::make_string("message");
for (uint32_t i = 0; ret == OB_SUCCESS && i < 3; i++)
{
field.cname_ = cname[i];
field.org_cname_ = cname[i];
if (i == 1)
field.type_.set_type(ObIntType);
else
field.type_.set_type(ObVarcharType);
if (OB_SUCCESS != (ret = result_set.add_field_column(field)))
{
jlog(WARN, "fail to add field column to result_set. ret=%d", ret);
break;
}
}
}
break;
}
case ObStmt::T_SHOW_GRANTS:
{
ObString tname = ObString::make_string("show grants");
ObString cname = ObString::make_string("grants");
field.tname_ = tname;
field.org_tname_ = tname;
field.cname_ = cname;
field.org_cname_ = cname;
field.type_.set_type(ObVarcharType);
if (OB_SUCCESS != (ret = result_set.add_field_column(field)))
{
jlog(WARN, "fail to add field column to result_set. ret=%d", ret);
break;
}
break;
}
case ObStmt::T_EXECUTE:
{
ObExecuteStmt *execute_stmt = static_cast<ObExecuteStmt*> (stmts_[0]);
ObResultSet *stored_plan = NULL;
if (session_info == NULL)
{
ret = OB_ERROR;
jlog(ERROR, "Session Info is needed. ret=%d", ret);
}
else if (execute_stmt == NULL)
{
ret = OB_ERR_PARSE_SQL;
jlog(WARN, "fail to get Execute statement");
}
else if ((stored_plan = session_info->get_plan(execute_stmt->get_stmt_name())) == NULL)
{
ret = OB_ERR_PREPARE_STMT_UNKNOWN;
jlog(USER_ERROR, "statement %.*s not prepared",
execute_stmt->get_stmt_name().size(), execute_stmt->get_stmt_name().data());
}
else if ((ret = result_set.from_prepared(*stored_plan)) != OB_SUCCESS)
{
jlog(WARN, "fail to fill result set");
}
else
{
jlog(DEBUG, "get physical plan, addr=%p", stored_plan->get_physical_plan());
jlog(DEBUG, "StoredPlan: %s", to_cstring(*stored_plan->get_physical_plan()));
}
break;
}
default:
break;
}
if (ret == OB_SUCCESS && question_marks_count_ > 0)
{
ret = result_set.pre_assign_params_room(question_marks_count_, alloc);
}
return ret;
}
#endif
void ObLogicalPlan::print(FILE* fp, int32_t level) const
{
uint32_t i;
fprintf(fp, "<LogicalPlan>\n");
fprintf(fp, " <StmtList>\n");
for (i = 0; i < stmts_.size(); i++)
{
ObBasicStmt* stmt = stmts_[i];
stmt->print(fp, level + 2, i);
}
fprintf(fp, " </StmtList>\n");
fprintf(fp, " <ExprList>\n");
for (i = 0; i < exprs_.size(); i++)
{
ObSqlRawExpr* sql_expr = exprs_[i];
sql_expr->print(fp, level + 2, i);
}
fprintf(fp, " </ExprList>\n");
fprintf(fp, "</LogicalPlan>\n");
}
/**************************************************
Funtion : get_expr_by_id
Author : qinbo
Date : 2013.9.10
Description : get expr by expr_id
Input : int64_t expr_id
Output : ObSqlRawExpr*
**************************************************/
ObSqlRawExpr* ObLogicalPlan::get_expr_by_id(uint64_t expr_id)
{
uint32_t i;
for (i = 0; i < exprs_.size(); i++)
{
ObSqlRawExpr* sql_expr = exprs_[i];
if (expr_id == sql_expr->get_expr_id())
{
return sql_expr;
}
}
return NULL;
}
/**************************************************
Funtion : make_stmt_string
Author : qinbo
Date : 2013.9.10
Description : make stmt string
Input : ResultPlan& result_plan,
string &assembled_sql_tmp
Output : ObSqlRawExpr*
**************************************************/
void ObLogicalPlan::make_stmt_string(ResultPlan& result_plan)
{
uint32_t i;
for (i = 0; i < stmts_.size(); i++)
{
string assembled_sql;
ObBasicStmt* stmt = stmts_[i];
stmt->make_stmt_string(result_plan, assembled_sql);
if (assembled_sql.size() > 0)
{
cout << "STMT string: " << assembled_sql << endl;
}
}
}
}
}