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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4
dbcon/dmlpackage/dml.l
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@ -42,7 +42,7 @@ namespace dmlpackage {
int lineno = 1;
static char* scanner_copy (char *str, yyscan_t yyscanner);
static char* scanner_copy (const char *str, yyscan_t yyscanner);
/* macro to save the text and return a token */
@ -256,7 +256,7 @@ void scanner_finish(yyscan_t yyscanner)
pScanData->valbuf.clear();
}
char* scanner_copy (char *str, yyscan_t yyscanner)
char* scanner_copy (const char *str, yyscan_t yyscanner)
{
char* nv = strdup(str);
if(nv)