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Bug#28497 wait_for_slave_to_stop can cause random replication mysql-test failures
- Add funtion "query_get_value to allow reading a fields value
into a $variable
client/mysqltest.c:
- Add function "let $var= query_get_value(<query>,<colname>,<row>)"
making it possible to read a value from a specific field in a query
into a $variable.
mysql-test/r/mysqltest.result:
Add test cases for "query_get_value"
mysql-test/t/mysqltest.test:
Add test cases for "query_get_value"
This commit is contained in:
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@ -655,4 +655,43 @@ INSERT INTO t1 SELECT f1 - 256 FROM t1;
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INSERT INTO t1 SELECT f1 - 512 FROM t1;
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SELECT * FROM t1;
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DROP TABLE t1;
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CREATE TABLE t1(
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a int, b varchar(255), c datetime
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);
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SHOW COLUMNS FROM t1;
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Field Type Null Key Default Extra
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a int(11) YES NULL
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b varchar(255) YES NULL
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c datetime YES NULL
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statement=SHOW COLUMNS FROM t1 row_number=1, column_name="Type", Value=int(11)
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statement="SHOW COLUMNS FROM t1" row_number=1, column_name="Type", Value=int(11)
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statement=SHOW COLUMNS FROM t1 row_number=1, column_name=Default, Value=NULL
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value= ->A B<-
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value= 1
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mysqltest: At line 1: query_get_value - argument list started with '(' must be ended with ')'
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mysqltest: At line 1: Missing required argument 'query' to command 'query_get_value'
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mysqltest: At line 1: Missing required argument 'column name' to command 'query_get_value'
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mysqltest: At line 1: Missing required argument 'row number' to command 'query_get_value'
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value= No such row
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value= No such row
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mysqltest: At line 1: Invalid row number: 'notnumber'
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mysqltest: At line 1: Could not find column 'column_not_exists' in the result of 'SHOW COLUMNS FROM t1'
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mysqltest: At line 1: Query 'SET @A = 1' didn't return a result set
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mysqltest: At line 1: Could not find column '1 AS B' in the result of 'SELECT 1 AS A'
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value= No such row
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mysqltest: At line 1: Error running query 'SHOW COLNS FROM t1': 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'COLNS FROM t1' at line 1
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Field Type Null Key Default Extra
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a int(11) YES -><- NULL
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b varchar(255) YES -><- NULL
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c datetime YES -><- NULL
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Number of columns with Default NULL: 3
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SHOW COLUMNS FROM t1;
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Field Type Null Key Default Extra
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a int(11) YES NULL
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b varchar(255) YES NULL
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c datetime YES NULL
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drop table t1;
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End of tests
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@ -1811,4 +1811,125 @@ SELECT * FROM t1;
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--enable_result_log
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DROP TABLE t1;
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# ----------------------------------------------------------------------------
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# test for query_get_value
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# ----------------------------------------------------------------------------
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CREATE TABLE t1(
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a int, b varchar(255), c datetime
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);
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SHOW COLUMNS FROM t1;
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#------------ Positive tests ------------
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# 1. constant parameters
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# value is simple string without spaces
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let $value= query_get_value(SHOW COLUMNS FROM t1, Type, 1);
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--echo statement=SHOW COLUMNS FROM t1 row_number=1, column_name="Type", Value=$value
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let $value= query_get_value("SHOW COLUMNS FROM t1", Type, 1);
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--echo statement="SHOW COLUMNS FROM t1" row_number=1, column_name="Type", Value=$value
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#
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# 2. $variables as parameters
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# value IS NULL
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let $my_show= SHOW COLUMNS FROM t1;
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let $column_name= Default;
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let $row_number= 1;
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let $value= query_get_value($my_show, $column_name, $row_number);
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--echo statement=$my_show row_number=$row_number, column_name=$column_name, Value=$value
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#
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# 3. result set of a SELECT (not recommended, because projection and
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# selection could be done much better by pure SELECT functionality)
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# value is string with space in the middle
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let $value= query_get_value(SELECT 'A B' AS "MyColumn", MyColumn, 1);
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--echo value= ->$value<-
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#
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# 4. column name with space
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let $value= query_get_value(SELECT 1 AS "My Column", My Column, 1);
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--echo value= $value
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#
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#------------ Negative tests ------------
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# 5. Incomplete statement including missing parameters
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# 5.1 incomplete statement
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--error 1
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--exec echo "let \$value= query_get_value(SHOW;" | $MYSQL_TEST 2>&1
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# 5.2 missing query
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--error 1
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--exec echo "let \$value= query_get_value;" | $MYSQL_TEST 2>&1
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# 5.3 missing column name
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--error 1
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--exec echo "let \$value= query_get_value(SHOW COLUMNS FROM t1);" | $MYSQL_TEST 2>&1
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# 5.4 missing row number
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--error 1
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--exec echo "let \$value= query_get_value(SHOW COLUMNS FROM t1, Field);" | $MYSQL_TEST 2>&1
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#
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# 6. Somehow "wrong" value of parameters
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# 6.1 row parameter
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# 6.1.1 non sense number 0
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let $value= initialized;
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let $value= query_get_value(SHOW COLUMNS FROM t1, Field, 0);
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--echo value= $value
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# 6.1.2 after the last row
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let $value= initialized;
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let $value= query_get_value(SHOW COLUMNS FROM t1, Field, 10);
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--echo value= $value
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# 6.1.3 invalid row number
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--error 1
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--exec echo "let \$value= query_get_value(SHOW COLUMNS FROM t1, Field, notnumber);" | $MYSQL_TEST 2>&1
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# 6.2 column name parameter, name of not existing column
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--error 1
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--exec echo "let \$value= query_get_value(SHOW COLUMNS FROM t1, column_not_exists, 1);" | $MYSQL_TEST 2>&1
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# 6.3. statement which never gives a result set
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--error 1
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--exec echo "let \$value= query_get_value(SET @A = 1, Field, 1);" | $MYSQL_TEST 2>&1
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# 6.4. statement contains a ","
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# Note: There is no need to improve this, because we need query_get_value
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# for SHOW commands only.
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--error 1
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--exec echo "let \$value= query_get_value(SELECT 1 AS "A", 1 AS "B", 1);" | $MYSQL_TEST 2>&1
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#
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# 7. empty result set
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let $value= initialized;
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let $value= query_get_value(SELECT a FROM t1, a, 1);
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--echo value= $value
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#
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# 9. failing statement
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--error 1
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--exec echo "let \$value= query_get_value(SHOW COLNS FROM t1, Field, 1);" | $MYSQL_TEST 2>&1
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#
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# 10. Artificial example how to process a complete SHOW result set:
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let $show_statement= SHOW COLUMNS FROM t1;
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let $rowno= 1;
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let $run=1;
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let $count= 0;
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--echo
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--echo Field Type Null Key Default Extra
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while ($run)
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{
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let $Field= query_get_value($show_statement, Field, $rowno);
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if (`SELECT '$Field' = 'No such row'`)
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{
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let $run= 0;
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}
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if (`SELECT '$Field' <> 'No such row'`)
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{
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let $Type= query_get_value($show_statement, Type, $rowno);
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let $Null= query_get_value($show_statement, Null, $rowno);
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if (`SELECT '$Null' = 'YES'`)
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{
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inc $count;
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}
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let $Key= query_get_value($show_statement, Key, $rowno);
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let $Default= query_get_value($show_statement, Default, $rowno);
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let $Extra= query_get_value($show_statement, Extra, $rowno);
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--echo $Field $Type $Null ->$Key<- $Default $Extra
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inc $rowno;
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}
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}
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--echo
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--echo Number of columns with Default NULL: $count
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--echo
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eval $show_statement;
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drop table t1;
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--echo End of tests
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