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SQL: SP idempotency fix

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Fixes #52
This commit is contained in:
Aleksey Midenkov
2016-10-18 16:35:52 +00:00
parent 44e581ebfc
commit 01c9d1c97f
3 changed files with 70 additions and 23 deletions
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52
sql/sql_select.cc
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@@ -701,44 +701,54 @@ setup_for_system_time(THD *thd, TABLE_LIST *tables, COND **where_expr, SELECT_LE
if (select_lex->saved_where)
{
DBUG_ASSERT(thd->stmt_arena->is_sp_execute());
*where_expr= select_lex->saved_where;
/* 2. this copy_andor_structure() is also required by the same reason */
*where_expr= select_lex->saved_where->copy_andor_structure(thd);
}
else if (thd->stmt_arena->is_sp_execute())
{
if (thd->stmt_arena->is_stmt_execute()) // SP executed second time (STMT_EXECUTED)
*where_expr= 0;
else if (*where_expr) // SP executed first time (STMT_INITIALIZED_FOR_SP)
/* copy_andor_structure() is required since this andor tree
/* 1. copy_andor_structure() is required since this andor tree
is modified later (and on shorter arena) */
select_lex->saved_where= (*where_expr)->copy_andor_structure(thd);
}
/* We have to save also non-versioned on_expr since we may have
conjuction of versioned + non-versioned */
if (thd->stmt_arena->is_sp_execute())
{
for (table= tables; table; table= table->next_local)
{
if (!table->table)
continue;
if (table->saved_on_expr) // same logic as saved_where
{
if (table->on_expr)
table->on_expr= table->saved_on_expr->copy_andor_structure(thd);
else
// on_expr was moved to WHERE (see below: Add ON expression to the WHERE)
*where_expr= and_items(thd,
*where_expr,
table->saved_on_expr->copy_andor_structure(thd));
}
else if (table->on_expr &&
thd->stmt_arena->state == Query_arena::STMT_INITIALIZED_FOR_SP)
{
table->saved_on_expr= table->on_expr->copy_andor_structure(thd);
}
}
}
for (table= tables; table; table= table->next_local)
{
if (table->table && table->table->versioned())
{
COND** dst_cond= where_expr;
if (table->saved_on_expr) // same logic as saved_where
{
DBUG_ASSERT(thd->stmt_arena->is_sp_execute());
if (table->on_expr)
{
table->on_expr= table->saved_on_expr;
dst_cond= &table->on_expr;
}
else
{
// on_expr was moved to WHERE (see below: Add ON expression to the WHERE)
*dst_cond= and_items(thd,
*where_expr,
table->saved_on_expr);
}
}
else if (table->on_expr)
if (table->on_expr)
{
dst_cond= &table->on_expr;
if (thd->stmt_arena->state == Query_arena::STMT_INITIALIZED_FOR_SP)
table->saved_on_expr= table->on_expr->copy_andor_structure(thd);
}
Field *fstart= table->table->vers_start_field();