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34eb10e406
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
35 lines
2 KiB
Text
35 lines
2 KiB
Text
set GLOBAL sql_mode="";
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set LOCAL sql_mode="";
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alter table mysql.user modify User char(16) binary not null default '';
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alter table mysql.db modify User char(16) binary not null default '';
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alter table mysql.tables_priv modify User char(16) binary not null default '';
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alter table mysql.columns_priv modify User char(16) binary not null default '';
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alter table mysql.procs_priv modify User char(16) binary not null default '';
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alter table mysql.proc modify definer char(77) collate utf8_bin not null default '';
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alter table mysql.event modify definer char(77) collate utf8_bin not null default '';
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flush privileges;
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select user();
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Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
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def user() 253 77 14 N 1 39 8
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user()
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root@localhost
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create user a17aaaaaaaaaaaaa0@localhost;
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ERROR HY000: String 'a17aaaaaaaaaaaaa0' is too long for user name (should be no longer than 16)
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grant usage on *.* to a17aaaaaaaaaaaaa0@lodalhost;
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ERROR HY000: String 'a17aaaaaaaaaaaaa0' is too long for user name (should be no longer than 16)
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drop user a17aaaaaaaaaaaaa0@lodalhost;
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ERROR HY000: String 'a17aaaaaaaaaaaaa0' is too long for user name (should be no longer than 16)
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alter table mysql.user modify User char(80) binary not null default '';
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alter table mysql.db modify User char(80) binary not null default '';
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alter table mysql.tables_priv modify User char(80) binary not null default '';
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alter table mysql.columns_priv modify User char(80) binary not null default '';
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alter table mysql.procs_priv modify User char(80) binary not null default '';
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alter table mysql.proc modify definer char(141) collate utf8_bin not null default '';
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alter table mysql.event modify definer char(141) collate utf8_bin not null default '';
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flush privileges;
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select user();
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Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
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def user() 253 141 14 N 1 39 8
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user()
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root@localhost
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set GLOBAL sql_mode=default;
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