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Item::print(): remove redundant parentheses

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by introducing new Item::precedence() method and using it
to decide whether parentheses are required
This commit is contained in:
Sergei Golubchik
2016-11-27 19:50:10 +01:00
parent 1db438c833
commit 180065ebb0
188 changed files with 2684 additions and 2553 deletions
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10
mysql-test/r/variables.result
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@@ -77,7 +77,7 @@ explain extended select @t1:=(@t2:=1)+@t3:=4,@t1,@t2,@t3;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select (@t1:=((@t2:=1) + (@t3:=4))) AS `@t1:=(@t2:=1)+@t3:=4`,(@`t1`) AS `@t1`,(@`t2`) AS `@t2`,(@`t3`) AS `@t3`
Note 1003 select @t1:=(@t2:=1) + (@t3:=4) AS `@t1:=(@t2:=1)+@t3:=4`,@`t1` AS `@t1`,@`t2` AS `@t2`,@`t3` AS `@t3`
select @t5;
@t5
1.23456
@@ -1805,19 +1805,19 @@ explain extended select @@VERsion from dual where rand() > @@verSION;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select @@VERsion AS "@@VERsion" from DUAL where (rand() > @@version)
Note 1003 select @@VERsion AS "@@VERsion" from DUAL where rand() > @@version
explain extended select @@SESsion.SQL_mode from dual where rand() > @@sesSION.sql_MODE;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select @@SESsion.SQL_mode AS "@@SESsion.SQL_mode" from DUAL where (rand() > @@sql_mode)
Note 1003 select @@SESsion.SQL_mode AS "@@SESsion.SQL_mode" from DUAL where rand() > @@sql_mode
explain extended select @@GLObal.COLLATION_connection from dual where rand() > @@gloBAL.collation_CONNECTION;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select @@GLObal.COLLATION_connection AS "@@GLObal.COLLATION_connection" from DUAL where (rand() > @@global.collation_connection)
Note 1003 select @@GLObal.COLLATION_connection AS "@@GLObal.COLLATION_connection" from DUAL where rand() > @@global.collation_connection
explain extended select @@FOObar.KEY_BUFfer_size from dual where rand() > @@fooBAR.key_bufFER_SIZE;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select @@FOObar.KEY_BUFfer_size AS "@@FOObar.KEY_BUFfer_size" from DUAL where (rand() > @@fooBAR.key_buffer_size)
Note 1003 select @@FOObar.KEY_BUFfer_size AS "@@FOObar.KEY_BUFfer_size" from DUAL where rand() > @@fooBAR.key_buffer_size