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Decimals with float, double and decimal now works the following way: - DECIMAL_NOT_SPECIFIED is used when declaring DECIMALS without a firm number of decimals. It's only used in asserts and my_decimal_int_part. - FLOATING_POINT_DECIMALS (31) is used to mark that a FLOAT or DOUBLE was defined without decimals. This is regarded as a floating point value. - Max decimals allowed for FLOAT and DOUBLE is FLOATING_POINT_DECIMALS-1 - Clients assumes that float and double with decimals >= NOT_FIXED_DEC are floating point values (no decimals) - In the .frm decimals=FLOATING_POINT_DECIMALS are used to define floating point for float and double (31, like before) To ensure compatibility with old clients we do: - When storing float and double, we change NOT_FIXED_DEC to FLOATING_POINT_DECIMALS. - When creating fields from .frm we change for float and double FLOATING_POINT_DEC to NOT_FIXED_DEC - When sending definition for a float/decimal field without decimals to the client as part of a result set we convert NOT_FIXED_DEC to FLOATING_POINT_DECIMALS. - variance() and std() has changed to limit the decimals to FLOATING_POINT_DECIMALS -1 to not get the double converted floating point. (This was to preserve compatiblity) - FLOAT and DOUBLE still have 30 as max number of decimals. Bugs fixed: variance() printed more decimals than we support for double values. New behaviour: - Strings now have 38 decimals instead of 30 when converted to decimal - CREATE ... SELECT with a decimal with > 30 decimals will create a column with a smaller range than before as we are trying to preserve the number of decimals. Other changes - We are now using the obsolete bit FIELDFLAG_LEFT_FULLSCREEN to specify decimals > 31 - NOT_FIXED_DEC is now declared in one place - For clients, NOT_FIXED_DEC is always 31 (to ensure compatibility). On the server NOT_FIXED_DEC is DECIMAL_NOT_SPECIFIED (39) - AUTO_SEC_PART_DIGITS is taken from DECIMAL_NOT_SPECIFIED - DOUBLE conversion functions are now using DECIMAL_NOT_SPECIFIED instead of NOT_FIXED_DEC
209 lines
9.5 KiB
Plaintext
209 lines
9.5 KiB
Plaintext
############## mysql-test\t\div_precision_increment_basic.test #################
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# #
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# Variable Name: div_precision_increment #
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# Scope: GLOBAL & SESSION #
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# Access Type: Dynamic #
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# Data Type: Numeric #
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# Default Value: 4 #
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# Range: 0 - 30 #
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# #
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# #
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# Creation Date: 2008-02-07 #
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# Author: Salman Rawala #
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# #
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# Description: Test Cases of Dynamic System Variable "div_precision_increment" #
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# that checks behavior of this variable in the following ways #
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# * Default Value #
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# * Valid & Invalid values #
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# * Scope & Access method #
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# * Data Integrity . #
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# #
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# Reference: http://dev.mysql.com/doc/refman/5.1/en/ #
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# server-system-variables.html#option_mysqld_div_precision_increment #
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# #
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################################################################################
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--source include/load_sysvars.inc
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#######################################################################
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# START OF div_precision_increment TESTS #
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#######################################################################
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#############################################################
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# Save initial value #
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#############################################################
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SET @start_global_value = @@global.div_precision_increment;
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SELECT @start_global_value;
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SET @start_session_value = @@session.div_precision_increment;
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SELECT @start_session_value;
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--echo '#--------------------FN_DYNVARS_027_01-------------------------#'
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#######################################################################
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# Display the DEFAULT value of div_precision_increment #
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#######################################################################
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SET @@global.div_precision_increment = 100;
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SET @@global.div_precision_increment = DEFAULT;
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SELECT @@global.div_precision_increment;
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SET @@session.div_precision_increment = 200;
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SET @@session.div_precision_increment = DEFAULT;
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SELECT @@session.div_precision_increment;
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--echo '#--------------------FN_DYNVARS_027_02-------------------------#'
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#######################################################################
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# Check the DEFAULT value of div_precision_increment #
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#######################################################################
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SET @@global.div_precision_increment = @start_global_value;
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SELECT @@global.div_precision_increment = 4;
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SET @@session.div_precision_increment = @start_session_value;
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SELECT @@session.div_precision_increment = 4;
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--echo '#--------------------FN_DYNVARS_027_03-------------------------#'
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#################################################################################
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# Change the value of div_precision_increment to a valid value for GLOBAL Scope #
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#################################################################################
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SET @@global.div_precision_increment = 1;
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SELECT @@global.div_precision_increment;
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SET @@global.div_precision_increment = 0;
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SELECT @@global.div_precision_increment;
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SET @@global.div_precision_increment = 10;
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SELECT @@global.div_precision_increment;
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SET @@global.div_precision_increment = 30;
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SELECT @@global.div_precision_increment;
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--echo '#--------------------FN_DYNVARS_027_04-------------------------#'
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##################################################################################
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# Change the value of div_precision_increment to a valid value for SESSION Scope #
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##################################################################################
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SET @@session.div_precision_increment = 1;
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SELECT @@session.div_precision_increment;
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SET @@session.div_precision_increment = 0;
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SELECT @@session.div_precision_increment;
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SET @@session.div_precision_increment = 7;
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SELECT @@session.div_precision_increment;
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SET @@session.div_precision_increment = 30;
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SELECT @@session.div_precision_increment;
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--echo '#------------------FN_DYNVARS_027_05-----------------------#'
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###################################################################
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# Change the value of div_precision_increment to an invalid value #
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###################################################################
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SET @@global.div_precision_increment = 39;
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SELECT @@global.div_precision_increment;
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SET @@global.div_precision_increment = 50;
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SELECT @@global.div_precision_increment;
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SET @@global.div_precision_increment = -1024;
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SELECT @@global.div_precision_increment;
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SET @@global.div_precision_increment = 65536;
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SELECT @@global.div_precision_increment;
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SET @@session.div_precision_increment = 50;
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SELECT @@session.div_precision_increment;
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SET @@session.div_precision_increment = 37;
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SELECT @@session.div_precision_increment;
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SET @@session.div_precision_increment = -2;
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SELECT @@session.div_precision_increment;
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SET @@session.div_precision_increment = 65550;
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SELECT @@session.div_precision_increment;
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--Error ER_WRONG_TYPE_FOR_VAR
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SET @@global.div_precision_increment = 65530.30;
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SELECT @@global.div_precision_increment;
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--Error ER_WRONG_TYPE_FOR_VAR
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SET @@global.div_precision_increment = OFF;
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SELECT @@global.div_precision_increment;
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--Error ER_WRONG_TYPE_FOR_VAR
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SET @@session.div_precision_increment = ON;
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SELECT @@session.div_precision_increment;
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--Error ER_WRONG_TYPE_FOR_VAR
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SET @@session.div_precision_increment = 65530.30;
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SELECT @@session.div_precision_increment;
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--echo '#------------------FN_DYNVARS_027_06-----------------------#'
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####################################################################
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# Check if the value in GLOBAL Table matches value in variable #
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####################################################################
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SELECT @@global.div_precision_increment = VARIABLE_VALUE
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FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
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WHERE VARIABLE_NAME='div_precision_increment';
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--echo '#------------------FN_DYNVARS_027_07-----------------------#'
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####################################################################
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# Check if the value in SESSION Table matches value in variable #
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####################################################################
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SELECT @@session.div_precision_increment = VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_VARIABLES WHERE VARIABLE_NAME='div_precision_increment';
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# FN_DYNVARS_027_07 - Check if TRUE and FALSE values can be used on variable
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SET @@global.div_precision_increment = TRUE;
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SELECT @@global.div_precision_increment;
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SET @@global.div_precision_increment = FALSE;
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SELECT @@global.div_precision_increment;
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--echo '#---------------------FN_DYNVARS_027_08----------------------#'
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####################################################################################
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# Check if accessing variable with and without GLOBAL point to same variable #
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####################################################################################
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SET @@global.div_precision_increment = 0;
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SELECT @@div_precision_increment = @@global.div_precision_increment;
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--echo '#---------------------FN_DYNVARS_027_09----------------------#'
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########################################################################################################
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# Check if accessing variable with SESSION,LOCAL and without SCOPE points to same session variable #
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########################################################################################################
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SET @@div_precision_increment = 1;
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SELECT @@div_precision_increment = @@local.div_precision_increment;
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SELECT @@local.div_precision_increment = @@session.div_precision_increment;
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--echo '#---------------------FN_DYNVARS_027_10----------------------#'
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##################################################################################
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# Check if div_precision_increment can be accessed with and without @@ sign #
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##################################################################################
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SET div_precision_increment = 1;
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SELECT @@div_precision_increment;
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--Error ER_PARSE_ERROR
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SET local.div_precision_increment = 1;
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--Error ER_UNKNOWN_TABLE
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SELECT local.div_precision_increment;
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--Error ER_PARSE_ERROR
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SET session.div_precision_increment = 1;
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--Error ER_UNKNOWN_TABLE
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SELECT session.div_precision_increment;
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--Error ER_BAD_FIELD_ERROR
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SELECT div_precision_increment = @@session.div_precision_increment;
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####################################
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# Restore initial value #
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####################################
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SET @@global.div_precision_increment = @start_global_value;
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SELECT @@global.div_precision_increment;
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SET @@session.div_precision_increment = @start_session_value;
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SELECT @@session.div_precision_increment;
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#######################################################
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# END OF div_precision_increment TESTS #
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#######################################################
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