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MCOL-2178 CS now explicitly calls MDB's optimizer using JOIN::optimizer_inner

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call.

CS doesn't use SH for SELECT..INTO OUTFILE queries.

Clean up gwi::physTableList when processing Storage API request.

SH now explicitly set an execution error in THD::stmt_da.

SH now set queryState in select_next() to mark a begging of the execution.
This commit is contained in:
Roman Nozdrin
2019-08-28 12:22:11 -05:00
committed by root
parent 2c63258537
commit cb36041587
3 changed files with 52 additions and 20 deletions
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56
dbcon/mysql/ha_mcs_pushdown.cpp
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@ -394,7 +394,7 @@ create_columnstore_derived_handler(THD* thd, TABLE_LIST *derived)
// Select_handler use the short-cut that effectively disables
// INSERT..SELECT and LDI
if ( (thd->lex)->sql_command == SQLCOM_INSERT_SELECT
|| (thd->lex)->sql_command == SQLCOM_CREATE_TABLE )
|| (thd->lex)->sql_command == SQLCOM_CREATE_TABLE)
{
unsupported_feature = true;
}
@ -642,29 +642,40 @@ create_columnstore_select_handler(THD* thd, SELECT_LEX* select_lex)
bool unsupported_feature = false;
// Select_handler use the short-cut that effectively disables
// INSERT..SELECT and LDI
if ( (thd->lex)->sql_command == SQLCOM_INSERT_SELECT
|| (thd->lex)->sql_command == SQLCOM_CREATE_TABLE )
// INSERT..SELECT, LDI, SELECT..INTO OUTFILE
if ((thd->lex)->sql_command == SQLCOM_INSERT_SELECT
|| (thd->lex)->sql_command == SQLCOM_CREATE_TABLE
|| (thd->lex)->exchange)
{
unsupported_feature = true;
}
// Impossible HAVING or WHERE
// TODO replace with function call
if ( unsupported_feature
|| select_lex->having_value == Item::COND_FALSE
|| select_lex->cond_value == Item::COND_FALSE )
{
unsupported_feature = true;
}
JOIN *join= select_lex->join;
// Next block tries to execute the query using SH very early to fallback
// if execution fails.
if (!unsupported_feature)
{
handler= new ha_columnstore_select_handler(thd, select_lex);
// TODO This part must explicitly call a list of needed optimizations
mutate_optimizer_flags(thd);
join->optimization_state= JOIN::OPTIMIZATION_IN_PROGRESS;
join->optimize_inner();
// Impossible HAVING or WHERE
// TODO replace with function call
if (unsupported_feature
|| select_lex->having_value == Item::COND_FALSE
|| select_lex->cond_value == Item::COND_FALSE )
{
unsupported_feature = true;
restore_optimizer_flags(thd);
}
}
if (!unsupported_feature)
{
handler= new ha_columnstore_select_handler(thd, select_lex);
// This is an ugly hack to call simplify_joins()
mcs_handler_info mhi= mcs_handler_info(reinterpret_cast<void*>(handler), SELECT);
// this::table is the place for the result set
int rc= ha_cs_impl_pushdown_init(&mhi, handler->table);
@ -679,6 +690,23 @@ create_columnstore_select_handler(THD* thd, SELECT_LEX* select_lex)
{
thd->get_stmt_da()->reset_diagnostics_area();
restore_optimizer_flags(thd);
unsupported_feature = true;
}
}
if (join->optimization_state != JOIN::NOT_OPTIMIZED)
{
if (!join->with_two_phase_optimization)
{
if (unsupported_feature && join->have_query_plan != JOIN::QEP_DELETED)
{
join->build_explain();
}
join->optimization_state= JOIN::OPTIMIZATION_DONE;
}
else
{
join->optimization_state= JOIN::OPTIMIZATION_PHASE_1_DONE;
}
}