database/mariadb-columnstore-engine
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fix(memory leaks): MCOL-5791 - get rid of memory leaks in plugin code

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There were numerous memory leaks in plugin's code and associated code.
During typical run of MTR tests it leaked around 65 megabytes of
objects. As a result they may severely affect long-lived connections.

This patch fixes (almost) all leaks found in the plugin. The exceptions
are two leaks associated with SHOW CREATE TABLE columnstore_table and
getting information of columns of columnstore-handled table. These
should be fixed on the server side and work is on the way.
This commit is contained in:
Serguey Zefirov
2024-09-30 14:50:35 +03:00
committed by Sergey Zefirov
parent 6445f4dff3
commit 38fd96a663
31 changed files with 472 additions and 229 deletions
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6
dbcon/mysql/sm.cpp
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@ -280,7 +280,7 @@ namespace sm
{
const std::string DEFAULT_SAVE_PATH = "/var/tmp";
status_t tpl_open(tableid_t tableid, cpsm_tplh_t* ntplh, cpsm_conhdl_t* conn_hdl)
status_t tpl_open(tableid_t tableid, sp_cpsm_tplh_t& ntplh, cpsm_conhdl_t* conn_hdl)
{
SMDEBUGLOG << "tpl_open: ntplh: " << ntplh << " conn_hdl: " << conn_hdl << " tableid: " << tableid << endl;
@ -359,7 +359,7 @@ status_t tpl_scan_close(sp_cpsm_tplsch_t& ntplsch)
return STATUS_OK;
}
status_t tpl_close(cpsm_tplh_t* ntplh, cpsm_conhdl_t** conn_hdl, QueryStats& stats, bool ask_4_stats,
status_t tpl_close(sp_cpsm_tplh_t& ntplh, cpsm_conhdl_t** conn_hdl, QueryStats& stats, bool ask_4_stats,
bool clear_scan_ctx)
{
cpsm_conhdl_t* hndl = *conn_hdl;
@ -369,7 +369,7 @@ status_t tpl_close(cpsm_tplh_t* ntplh, cpsm_conhdl_t** conn_hdl, QueryStats& sta
SMDEBUGLOG << " tableid: " << ntplh->tableid;
SMDEBUGLOG << endl;
delete ntplh;
ntplh.reset();
// determine end of result set and end of statement execution
if (hndl->queryState == QUERY_IN_PROCESS)