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Fix for BUG#12977.

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mysql-test/r/select.result:
  Test for BUG#12977.
mysql-test/t/select.test:
  Test for BUG#12977.
sql/sql_base.cc:
  - Compare table qualifier of qualified fields only with tables that
    are not natural joins or their operands.
  - For qualified fields perform recursive search in all operands of
    natural joins that are nested joins.
  - Symmetrically detect ambiguous columns for both operands of
    NATURAL/USING joins.
This commit is contained in:
unknown
2005-09-08 11:29:52 +03:00
parent 027476e542
commit 9adffe2926
3 changed files with 58 additions and 7 deletions
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15
mysql-test/r/select.result
View File

@ -2897,3 +2897,18 @@ select * from t1 natural join t2 where a = 'b';
a
b
drop table t1, t2;
CREATE TABLE t1 (`id` TINYINT);
CREATE TABLE t2 (`id` TINYINT);
CREATE TABLE t3 (`id` TINYINT);
INSERT INTO t1 VALUES (1),(2),(3);
INSERT INTO t2 VALUES (2);
INSERT INTO t3 VALUES (3);
SELECT t1.id,t3.id FROM t1 JOIN t2 ON (t2.id=t1.id) LEFT JOIN t3 USING (id);
ERROR 23000: Column 'id' in from clause is ambiguous
SELECT t1.id,t3.id FROM t1 JOIN t2 ON (t2.notacolumn=t1.id) LEFT JOIN t3 USING (id);
ERROR 23000: Column 'id' in from clause is ambiguous
SELECT id,t3.id FROM t1 JOIN t2 ON (t2.id=t1.id) LEFT JOIN t3 USING (id);
ERROR 23000: Column 'id' in from clause is ambiguous
SELECT id,t3.id FROM (t1 JOIN t2 ON (t2.id=t1.id)) LEFT JOIN t3 USING (id);
ERROR 23000: Column 'id' in from clause is ambiguous
drop table t1, t2, t3;

22
mysql-test/t/select.test
View File

@ -2465,3 +2465,25 @@ insert into t2 values ('b'),('c'),('d');
select a from t1 natural join t2;
select * from t1 natural join t2 where a = 'b';
drop table t1, t2;
#
# Bug #12977 Compare table names with qualifying field tables only
# for base tables, search all nested join operands of natural joins.
#
CREATE TABLE t1 (`id` TINYINT);
CREATE TABLE t2 (`id` TINYINT);
CREATE TABLE t3 (`id` TINYINT);
INSERT INTO t1 VALUES (1),(2),(3);
INSERT INTO t2 VALUES (2);
INSERT INTO t3 VALUES (3);
-- error 1052
SELECT t1.id,t3.id FROM t1 JOIN t2 ON (t2.id=t1.id) LEFT JOIN t3 USING (id);
-- error 1052
SELECT t1.id,t3.id FROM t1 JOIN t2 ON (t2.notacolumn=t1.id) LEFT JOIN t3 USING (id);
-- error 1052
SELECT id,t3.id FROM t1 JOIN t2 ON (t2.id=t1.id) LEFT JOIN t3 USING (id);
-- error 1052
SELECT id,t3.id FROM (t1 JOIN t2 ON (t2.id=t1.id)) LEFT JOIN t3 USING (id);
drop table t1, t2, t3;