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# Copyright (C) 2008-2010 Sun Microsystems, Inc. All rights reserved.
# Use is subject to license terms.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
# USA
################################################################################
# outer_join.yy
# Purpose: Random Query Generator grammar for testing larger (6 - 10 tables) JOINs
# Tuning: Please tweak the rule table_or_joins ratio of table:join for larger joins
# NOTE: be aware that larger (15-20 tables) queries can take far too
# long to run to be of much interest for fast, automated testing
#
# Notes: This grammar is designed to be used with gendata=conf/optimizer/outer_join.zz
# It can be altered, but one will likely need field names
# Additionally, it is not recommended to use the standard RQG-produced
# tables as they way we pick tables can result in the use of
# several large tables that will bog down a generated query
#
# Please rely largely on the _portable variant of this grammar if
# doing 3-way comparisons as it has altered code that will produce
# more standards-compliant queries for use with other DBMS's
#
# We keep the grammar here as it is in order to also test certain
# MySQL-specific syntax variants.
################################################################################
query:
{ @nonaggregates = () ; $tables = 0 ; $fields = 0 ; "" } query_type ;
query_type:
simple_select | simple_select | mixed_select | mixed_select | mixed_select | aggregate_select ;
mixed_select:
{ $stack->push() } SELECT distinct straight_join select_option select_list FROM join WHERE where_list group_by_clause having_clause order_by_clause { $stack->pop(undef) } ;
simple_select:
{ $stack->push() } SELECT distinct straight_join select_option simple_select_list FROM join WHERE where_list optional_group_by having_clause order_by_clause { $stack->pop(undef) } ;
aggregate_select:
{ $stack->push() } SELECT distinct straight_join select_option aggregate_select_list FROM join WHERE where_list optional_group_by having_clause order_by_clause { $stack->pop(undef) } ;
distinct: DISTINCT | | | | ;
select_option: | | | | | | | | | SQL_SMALL_RESULT ;
straight_join: | | | | | | | | | | | STRAIGHT_JOIN ;
select_list:
new_select_item |
new_select_item , select_list |
new_select_item , select_list ;
simple_select_list:
nonaggregate_select_item |
nonaggregate_select_item , simple_select_list |
nonaggregate_select_item , simple_select_list ;
aggregate_select_list:
aggregate_select_item | aggregate_select_item |
aggregate_select_item, aggregate_select_list ;
new_select_item:
nonaggregate_select_item |
nonaggregate_select_item |
nonaggregate_select_item |
nonaggregate_select_item |
nonaggregate_select_item |
aggregate_select_item ;
nonaggregate_select_item:
table_alias . int_field_name AS { my $f = "field".++$fields ; push @nonaggregates , $f ; $f } ;
aggregate_select_item:
aggregate table_alias . int_field_name ) AS {"field".++$fields } ;
join:
{ $stack->push() }
table_or_join
{ $stack->set("left",$stack->get("result")); }
left_right outer JOIN table_or_join
ON
join_condition ;
join_condition:
int_condition | char_condition ;
int_condition:
{ my $left = $stack->get("left"); my %s=map{$_=>1} @$left; my @r=(keys %s); my $table_string = $prng->arrayElement(\@r); my @table_array = split(/AS/, $table_string); $table_array[1] } . int_indexed =
{ my $right = $stack->get("result"); my %s=map{$_=>1} @$right; my @r=(keys %s); my $table_string = $prng->arrayElement(\@r); my @table_array = split(/AS/, $table_string); $table_array[1] } . int_indexed
{ my $left = $stack->get("left"); my $right = $stack->get("result"); my @n = (); push(@n,@$right); push(@n,@$left); $stack->pop(\@n); return undef } |
{ my $left = $stack->get("left"); my %s=map{$_=>1} @$left; my @r=(keys %s); my $table_string = $prng->arrayElement(\@r); my @table_array = split(/AS/, $table_string); $table_array[1] } . int_indexed =
{ my $right = $stack->get("result"); my %s=map{$_=>1} @$right; my @r=(keys %s); my $table_string = $prng->arrayElement(\@r); my @table_array = split(/AS/, $table_string); $table_array[1] } . int_field_name
{ my $left = $stack->get("left"); my $right = $stack->get("result"); my @n = (); push(@n,@$right); push(@n,@$left); $stack->pop(\@n); return undef } |
{ my $left = $stack->get("left"); my %s=map{$_=>1} @$left; my @r=(keys %s); my $table_string = $prng->arrayElement(\@r); my @table_array = split(/AS/, $table_string); $table_array[1] } . int_field_name =
{ my $right = $stack->get("result"); my %s=map{$_=>1} @$right; my @r=(keys %s); my $table_string = $prng->arrayElement(\@r); my @table_array = split(/AS/,
$table_string); $table_array[1] } . int_indexed
{ my $left = $stack->get("left"); my $right = $stack->get("result"); my @n = (); push(@n,@$right); push(@n,@$left); $stack->pop(\@n); return undef } |
{ my $left = $stack->get("left"); my %s=map{$_=>1} @$left; my @r=(keys %s); my $table_string = $prng->arrayElement(\@r); my @table_array = split(/AS/, $table_string); $table_array[1] } . int_field_name =
{ my $right = $stack->get("result"); my %s=map{$_=>1} @$right; my @r=(keys %s); my $table_string = $prng->arrayElement(\@r); my @table_array = split(/AS/,
$table_string); $table_array[1] } . int_field_name
{ my $left = $stack->get("left"); my $right = $stack->get("result"); my @n = (); push(@n,@$right); push(@n,@$left); $stack->pop(\@n); return undef } ;
char_condition:
{ my $left = $stack->get("left"); my %s=map{$_=>1} @$left; my @r=(keys %s); my $table_string = $prng->arrayElement(\@r); my @table_array = split(/AS/, $table_string); $table_array[1] } . char_field_name =
{ my $right = $stack->get("result"); my %s=map{$_=>1} @$right; my @r=(keys %s); my $table_string = $prng->arrayElement(\@r); my @table_array = split(/AS/, $table_string); $table_array[1] } . char_field_name
{ my $left = $stack->get("left"); my $right = $stack->get("result"); my @n = (); push(@n,@$right); push(@n,@$left); $stack->pop(\@n); return undef } |
{ my $left = $stack->get("left"); my %s=map{$_=>1} @$left; my @r=(keys %s); my $table_string = $prng->arrayElement(\@r); my @table_array = split(/AS/, $table_string); $table_array[1] } . char_indexed =
{ my $right = $stack->get("result"); my %s=map{$_=>1} @$right; my @r=(keys %s); my $table_string = $prng->arrayElement(\@r); my @table_array = split(/AS/, $table_string); $table_array[1] } . char_field_name
{ my $left = $stack->get("left"); my $right = $stack->get("result"); my @n = (); push(@n,@$right); push(@n,@$left); $stack->pop(\@n); return undef } |
{ my $left = $stack->get("left"); my %s=map{$_=>1} @$left; my @r=(keys %s); my $table_string = $prng->arrayElement(\@r); my @table_array = split(/AS/, $table_string); $table_array[1] } . char_field_name =
{ my $right = $stack->get("result"); my %s=map{$_=>1} @$right; my @r=(keys %s); my $table_string = $prng->arrayElement(\@r); my @table_array = split(/AS/, $table_string); $table_array[1] } . char_indexed
{ my $left = $stack->get("left"); my $right = $stack->get("result"); my @n = (); push(@n,@$right); push(@n,@$left); $stack->pop(\@n); return undef } ;
where_list:
where_item | where_item |
( where_list and_or where_item ) ;
where_item:
existing_table_item . `pk` comparison_operator _digit |
existing_table_item . `pk` comparison_operator existing_table_item . int_field_name |
existing_table_item . int_field_name comparison_operator _digit |
existing_table_item . int_field_name comparison_operator existing_table_item . int_field_name |
existing_table_item . int_field_name IS not NULL |
existing_table_item . int_field_name not IN (number_list) |
existing_table_item . int_field_name not BETWEEN _digit[invariant] AND ( _digit[invariant] + _digit );
number_list:
_digit | number_list, _digit ;
################################################################################
# We ensure that a GROUP BY statement includes all nonaggregates. #
# This helps to ensure the query is more useful in detecting real errors / #
# that the query doesn't lend itself to variable result sets #
################################################################################
group_by_clause:
{ scalar(@nonaggregates) > 0 ? " GROUP BY ".join (', ' , @nonaggregates ) : "" } ;
optional_group_by:
| | | | | | | | group_by_clause ;
having_clause:
| HAVING having_list;
having_list:
having_item |
having_item |
(having_list and_or having_item) ;
having_item:
existing_select_item comparison_operator _digit ;
################################################################################
# We use the total_order_by rule when using the LIMIT operator to ensure that #
# we have a consistent result set - server1 and server2 should not differ #
################################################################################
order_by_clause:
|
ORDER BY total_order_by desc limit |
ORDER BY order_by_list ;
total_order_by:
{ join(', ', map { "field".$_ } (1..$fields) ) };
order_by_list:
order_by_item |
order_by_item , order_by_list ;
order_by_item:
existing_select_item desc ;
desc:
ASC | | | | | DESC ;
################################################################################
# We mix digit and _digit here. We want to alter the possible values of LIMIT #
# To ensure we hit varying EXPLAIN plans, but the OFFSET can be smaller #
################################################################################
limit:
| | LIMIT limit_size | LIMIT limit_size OFFSET _digit;
################################################################################
# recommend 8 tables : 2 joins for smaller queries, 6:2 for larger ones
################################################################################
table_or_join:
table | table | table | table | table |
table | table | table | join | join ;
table_disabled:
# We use the "AS table" bit here so we can have unique aliases if we use the same table many times
{ $stack->push(); my $x = $prng->arrayElement(\@table_set)." AS table".++$tables; my @s=($x); $stack->pop(\@s); $x } ;
table:
# We use the "AS table" bit here so we can have unique aliases if we use the same table many times
{ $stack->push(); my $x = $prng->arrayElement($executors->[0]->tables())." AS table".++$tables; my @s=($x); $stack->pop(\@s); $x } ;
int_field_name:
`pk` | `col_int_key` | `col_int` ;
int_indexed:
`pk` | `col_int_key` ;
char_field_name:
`col_varchar_10` |
`col_varchar_255_key` |
`col_varchar_255` |
`col_varchar_10_key` ;
char_indexed:
`col_varchar_10_key` | `col_varchar_10_key` |
`col_varchar_255_key` |`col_varchar_255_key` ;
table_alias:
table1 | table1 | table1 | table1 | table1 | table1 | table1 | table1 | table1 | table1 |
table2 | table2 | table2 | table2 | table2 | table2 | table2 | table2 | table2 | other_table ;
other_table:
table3 | table3 | table3 | table3 | table3 | table4 | table4 | table5 ;
existing_table_item:
{ "table".$prng->int(1,$tables) };
existing_select_item:
{ "field".$prng->int(1,$fields) };
_digit:
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | _tinyint_unsigned ;
and_or:
AND | AND | OR ;
comparison_operator:
= | > | < | != | <> | <= | >= ;
aggregate:
COUNT( distinct | SUM( distinct | MIN( distinct | MAX( distinct ;
not:
| | | NOT;
left_right:
LEFT | LEFT | LEFT | RIGHT ;
outer:
| | | | OUTER ;
################################################################################
# We define LIMIT_rows in this fashion as LIMIT values can differ depending on #
# how large the LIMIT is - LIMIT 2 = LIMIT 9 != LIMIT 19 #
################################################################################
limit_size:
1 | 2 | 10 | 100 | 1000;
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