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Add qc_get_preparable_stmt

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This function will return the preparable statement of a PREPARE
statement as a COM_QUERY GWBUF. That is, once obtained, the normal
query classifier functions can be used for obtaining information
about the preparable statement itself.
This commit is contained in:
Johan Wikman
2017-01-16 15:28:31 +02:00
parent 7fee90a399
commit e349319400
5 changed files with 97 additions and 2 deletions
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34
query_classifier/qc_sqlite/qc_sqlite.c
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@ -2796,6 +2796,7 @@ static int32_t qc_sqlite_get_table_names(GWBUF* query, int32_t fullnames, char**
static int32_t qc_sqlite_get_canonical(GWBUF* query, char** canonical);
static int32_t qc_sqlite_query_has_clause(GWBUF* query, int32_t* has_clause);
static int32_t qc_sqlite_get_database_names(GWBUF* query, char*** names, int* sizep);
static int32_t qc_sqlite_get_preparable_stmt(GWBUF* stmt, GWBUF** preparable_stmt);
static bool get_key_and_value(char* arg, const char** pkey, const char** pvalue)
{
@ -3411,6 +3412,38 @@ int32_t qc_sqlite_get_function_info(GWBUF* query, const QC_FUNCTION_INFO** infos
return rv;
}
int32_t qc_sqlite_get_preparable_stmt(GWBUF* stmt, GWBUF** preparable_stmt)
{
QC_TRACE();
int32_t rv = QC_RESULT_ERROR;
ss_dassert(this_unit.initialized);
ss_dassert(this_thread.initialized);
*preparable_stmt = NULL;
QC_SQLITE_INFO* info = get_query_info(stmt);
if (info)
{
if (qc_info_is_valid(info->status))
{
// TODO: Extract the preparable stmt.
ss_dassert(!true);
rv = QC_RESULT_OK;
}
else if (MXS_LOG_PRIORITY_IS_ENABLED(LOG_INFO))
{
log_invalid_data(stmt, "cannot report field info");
}
}
else
{
MXS_ERROR("The query could not be parsed. Response not valid.");
}
return rv;
}
/**
* EXPORTS
*/
@ -3437,6 +3470,7 @@ MXS_MODULE* MXS_CREATE_MODULE()
qc_sqlite_get_prepare_operation,
qc_sqlite_get_field_info,
qc_sqlite_get_function_info,
qc_sqlite_get_preparable_stmt,
};
static MXS_MODULE info =