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MDEV-26695: Number of an invalid row is not calculated for table value

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constructor

Analysis: counter does not increment while sending rows for table value
constructor and so row_number assumes the default value (0 in this case).
Fix: Increment the counter to avoid counter using default value.
This commit is contained in:
Rucha Deodhar
2022-01-23 13:42:41 +05:30
parent 9e314fcf6e
commit ee5966c754
3 changed files with 63 additions and 2 deletions
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35
mysql-test/main/get_diagnostics.result
View File

@ -1811,3 +1811,38 @@ SELECT @n;
@n
4
DROP TABLE t;
#
# MDEV-26695: Number of an invalid row is not calculated for table value constructor
#
CREATE TABLE t1 (a CHAR(1)) VALUES ('a'),('b'),('foo');
Warnings:
Warning 1406 Data too long for column 'a' at row 3
GET DIAGNOSTICS CONDITION 1 @n= ROW_NUMBER;
SELECT @n;
@n
3
CREATE TABLE t2 (a CHAR(1)) VALUES ('a'),('b') UNION VALUES ('foo');
Warnings:
Warning 1406 Data too long for column 'a' at row 3
GET DIAGNOSTICS CONDITION 1 @n= ROW_NUMBER;
SELECT @n;
@n
3
DROP TABLE t1, t2;
# Checking that CREATE ... SELECT works
CREATE TABLE t1 (val1 CHAR(5));
INSERT INTO t1 VALUES ('A'),('B'),('C'),('DEF');
CREATE TABLE t2 (val2 CHAR(1)) SELECT val1 as val2 FROM t1;
Warnings:
Warning 1406 Data too long for column 'val2' at row 4
GET DIAGNOSTICS CONDITION 1 @n= ROW_NUMBER;
SELECT @n;
@n
4
SELECT * FROM t2;
val2
A
B
C
D
DROP TABLE t1,t2;

24
mysql-test/main/get_diagnostics.test
View File

@ -1687,3 +1687,27 @@ GET DIAGNOSTICS CONDITION 3 @n = ROW_NUMBER;
SELECT @n;
DROP TABLE t;
--echo #
--echo # MDEV-26695: Number of an invalid row is not calculated for table value constructor
--echo #
CREATE TABLE t1 (a CHAR(1)) VALUES ('a'),('b'),('foo');
GET DIAGNOSTICS CONDITION 1 @n= ROW_NUMBER;
SELECT @n;
CREATE TABLE t2 (a CHAR(1)) VALUES ('a'),('b') UNION VALUES ('foo');
GET DIAGNOSTICS CONDITION 1 @n= ROW_NUMBER;
SELECT @n;
DROP TABLE t1, t2;
--echo # Checking that CREATE ... SELECT works
CREATE TABLE t1 (val1 CHAR(5));
INSERT INTO t1 VALUES ('A'),('B'),('C'),('DEF');
CREATE TABLE t2 (val2 CHAR(1)) SELECT val1 as val2 FROM t1;
GET DIAGNOSTICS CONDITION 1 @n= ROW_NUMBER;
SELECT @n;
SELECT * FROM t2;
DROP TABLE t1,t2;

6
sql/sql_tvc.cc
View File

@ -422,7 +422,9 @@ bool table_value_constr::exec(SELECT_LEX *sl)
DBUG_ENTER("table_value_constr::exec");
List_iterator_fast<List_item> li(lists_of_values);
List_item *elem;
THD *cur_thd= sl->parent_lex->thd;
ha_rows send_records= 0;
int rc=0;
if (select_options & SELECT_DESCRIBE)
DBUG_RETURN(false);
@ -438,10 +440,10 @@ bool table_value_constr::exec(SELECT_LEX *sl)
while ((elem= li++))
{
cur_thd->get_stmt_da()->inc_current_row_for_warning();
if (send_records >= sl->master_unit()->lim.get_select_limit())
break;
int rc=
result->send_data_with_check(*elem, sl->master_unit(), send_records);
rc= result->send_data_with_check(*elem, sl->master_unit(), send_records);
if (!rc)
send_records++;
else if (rc > 0)