Bugs item #2864313, was opened at 2009-09-22 15:26
Message generated for change (Tracker Item Submitted) made by stmane
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Category: SQL/Core
Group: SQL "stable"
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Stefan Manegold (stmane)
Assigned to: Niels Nes (nielsnes)
Summary: SQL: Update changes all columns with same type and default
Initial Comment:
When updating a not yet filled column, all columns of the same type and with
the same default get modified:
sql>CREATE TABLE "t0" (
more> "d0" double
more>);
Operation successful
sql>CREATE TABLE "t1" (
more> "d1" double,
more> "v1" varchar(255),
more> "v2" varchar(255)
more>);
Operation successful
sql>COPY 1025 RECORDS INTO t0 FROM '/tmp/err2.data' USING DELIMITERS '\t';
Rows affected 1025
sql>select count(*) from t0;
+-------+
| L1 |
+=======+
| 1025 |
+-------+
1 tuple
sql>INSERT INTO t1 (d1) SELECT d0 FROM t0;
Rows affected 1025
sql>select count(*) from t1;
+-------+
| L2 |
+=======+
| 1025 |
+-------+
1 tuple
sql>select d1, v2, v1 from t1 limit 1;
+------------------------+---------------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| d1 | v2
| v1
|
+========================+=========================================================================================================+=========================================================================================================+
| 0 | null
| null
|
+------------------------+---------------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
1 tuple
sql>Update t1 Set v2 = 'AA';
Rows affected 1025
sql>select d1, v2, v1 from t1 limit 1;
+------------------------+-------+-------+
| d1 | v2 | v1 |
+========================+=======+=======+
| 0 | AA | AA |
+------------------------+-------+-------+
1 tuple
sql>Update t1 Set d1 = -1.2;
Rows affected 1025
sql>select d1, v2, v1 from t1 limit 1;
+------------------------+-------+-------+
| d1 | v2 | v1 |
+========================+=======+=======+
| -1.2 | AA | AA |
+------------------------+-------+-------+
1 tuple
sql>Update t1 Set v1 = 'BB';
Rows affected 1025
sql>select d1, v2, v1 from t1 limit 1;
+------------------------+-------+-------+
| d1 | v2 | v1 |
+========================+=======+=======+
| -1.2 | BB | BB |
+------------------------+-------+-------+
1 tuple
sql>drop table t1;
Operation successful
sql>drop table t0;
Operation successful
It works fine when bulkloading <= 1024 tuples, or when using different defaults
for all non-initialized columns, e.g.,
"v1" varchar(255) default 'x',
"v2" varchar(255) default 'y'
I will add a test to CVS.
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