Converting the encoding of your production database from SQL_ASCII to UTF8 can be a tricky challenge if you cannot accept any down time.
The method presented here scans through all rows with text/varchar columns and writes any such rows to a separate schema, allowing you to dump the schema to analyze each individual rows.
1. Define a function to check if a string is valid UTF8 or not.
CREATE OR REPLACE FUNCTION Is_UTF8(_Str text) RETURNS BOOLEAN AS $BODY$
$BODY$ LANGUAGE sql IMMUTABLE;
2. Create a schema for the invalid UTF8 rows:
CREATE SCHEMA invalidutf8;
3. Generate a script which will create and populate a table for each table with text/varchar columns, containing rows with invalid UTF8 text.
SELECT 'CREATE TABLE invalidutf8.' || s.nspname || '_' || c.relname || ' AS SELECT * FROM ' || s.nspname || '.' || c.relname || ' WHERE Is_UTF8(' || array_to_string(array_agg(a.attname),') IS FALSE OR Is_UTF8(') || ') IS FALSE;'
FROM pg_attribute a
INNER JOIN pg_class c ON (a.attrelid = c.oid)
INNER JOIN pg_namespace s ON (s.oid = c.relnamespace)
WHERE a.atttypid IN (25, 1043) -- text, varchar
AND c.relkind = 'r' -- ordinary table
AND s.nspname NOT LIKE 'pg_%' AND s.nspname NOT IN ('pgx_diag','information_schema')
GROUP BY s.nspname, c.relname
ORDER BY s.nspname, c.relname
) TO '/tmp/invalidutf8.sql';
4. Run the script, in psql type:
5. We will now dump the schema and analyze the rows:
pg_dump -f invalidutf8.dump -F p -n invalidutf8 -h 127.0.0.1 --column-inserts -a thedatabasename
It is now easy to either delete rows or convert then to UTF-8, provided you know the encoding, otherwise you can always replace any non-ascii chars with whitespace.
Let’s say you noticed you have a table Users with a text column Lastname, containing invalid UTF-8, which you identify being latin1.
The below SQL updates only the rows with invalid characters and also checks the text converted from latin1 is valid utf8.
UPDATE Users SET Lastname = convert( textsend(Lastname), 'latin1', 'utf8' )::text
WHERE UserID IN (
SELECT UserID FROM invalidutf8.Users
) IS TRUE
6. Drop the schema to drop all the invalidutf8.* tables we created.
DROP SCHEMA invalidutf8 CASCADE;
To verify, do the whole thing again. If the pg_dump of the invalidutf8 schema doesn’t contain any INSERT rows, you can be certain you have a clean UTF8 database.
7. It should now be safe to change the encoding of the database to UTF8.
UPDATE pg_database SET encoding = pg_char_to_encoding('UTF8') WHERE datname = 'thedatabasename';
Lastly, after changing the encoding, do the whole thing again (step 2-6) and verify no invalid UTF8 rows have managed to be inserted during the time between your last check and the changing of encoding.
I’m not giving any guarantees this is a safe way to do it, but personally it was my only option as we wouldn’t accept a down time.
So far so good, I guess the only way to know for sure is to try doing a pg_dump / pg_restore and see if it complains.
I’ve converted a TB sized DB via Slony.
Replica was set to UTF-8 client_encoding and the source was forced to WIN1252 client_encoding. This was possible because Apache was requesting all data-input from browsers to be LATIN1.
Actual downtime of unavailability to customers was a few minutes and the results were as expected.
Subbed * UserIsAnFBIAgent beautiful ne Vdeo i got a error A gerinec error occurred in GDI +. Please help this has been, is the code I get the error BMP. Save (Directoria Frame1 & & img1)
to me, that before she can move on with me, she nedeed to see if there was anything left in her marriage. She said she wouldn’t be able to go on with me with the what if always in the back of her mind. This experiment lasted an entire month with the end result of her coming back to me because she wasn’t feeling it with him . We came back from a beautiful Caribbean vacation 3 weeks ago and 2 days after that, over the phone, she said she and I were done, its over, she’s moved on. I came to find out 2 days after that, she is giving her husband R another chance. That he broke up with his girlfriend (claims to have never loved her) and he will be moving back into the house with M within 2 weeks. This same house he signed over to her as part of the agreement . She said she never stopped loving him and never wanted to see the marriage fail. She say’s it’s the family unit thing. and the fairy tale happily ever after..This is the part I have trouble with. She maintains contact with me when he is not around, i receive texts from her almost every day. She said she misses me, she misses certain acts of intimacy we did together, things she doesnt get where she is now. She said I am a sincere person, something else she doesn’t feel now. She said that for her marriage to succeed, she needs to feel different. She wont settle for how things were just around the time he left her. I think she deserves better.She now has issues with trust, and concerns as to whether she is making the right decisions. he basically is calling all the shots now, she wanted some of her own space after leaving me, but he pretty much forced his way back in, saying why wait, we’re moving in anyway.. She is giving me signals that this got out of her control and now that the ball had started rolling (getting back with him) she can’t go back now and has to see it through. I had my own issues that made her uneasy and all are being worked through and she knows it. She said that if some of my issues werent there, she wouldn’t have moved on with him. I gave her time to sort things out last time and she came back to me, but this seems a little more final I love her with all my heart, she has made me happier than any woman I have ever been with, even happier than my wife made me at the best time of our marriage (12 yrs divorced).I want to hold on, but the constant thoughts of her is overwhelming.Help PleaseVLJR
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Yes, Slony is a nice way to do it, but does it work if you have many different encodings in your database? In my case I had a mix of no less than three different encodings, some texts had different encodings even within the same text, and for some texts I couldn’t identify the encoding at all. This required some manual work, unless you dare to go blindfolded and simply replace all non-UTF8 with whitespace, but I preferred to look at the data before/after to make sure it went OK.
Just for fun I tried adding the coanmmd show log wondering what it would do I laughed when the answer returned was OH SHI- . Anyway the upgrade tool is cool and seems to work well.
Thank you for your help. I used the second aocaprph to get past configuring MySQL to have root access from remote machine. Here is what I did: From command line, log in mysql (mysql -h localhost -u root -p)>)mysql> use mysqlmysql> ALTER TABLE `user` CHANGE COLUMN `authentication_string` `authentication_string` TEXT NULL COLLATE ‘utf8_bin’ AFTER `plugin`; This operation should succeed.Configure MySQL again (with root access allowed for remote machine checked) and the operation should succeed this time.
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she was so sorry because it truley was out of her personality. So then I went oh fuck.. what have I done because I basically cheated on my girlfriend out of anger and I felt so bad about it. So all of that Sunday I felt guilty and wanted to tell her and she kept asking me whats wrong and I said nothing.. then Monday morning rolls around, and she left for work in the morning and I couldnt fall back asleep so I HAD to tell her I just felt guilty and I knew one of her friends would make it sound worse if they told her first so I messaged her on facebook and told her.. so she said wow i have some thinking to do today then so a few hours after that she text me and said were done and she will not be with a cheater and she will not ever forgive me and etc. So i said please call me and she said no, so i went to her work and her boss told me she doesnt want to talk to me, so I left and went to work for the rest of the day without texting her or hearing from her all day. I came home around 7 at night, and she came here with her whole family and took all her stuff and moved to her moms about an hour out of town. I did not try to contact her because im afraid of pushing her away. She blocked me from everything. Phone/facebook and told everyone she never wants to talk to me again.. a year and half relationship just thrown away from a bad mistake Its been two weeks since this all happened and ive only attempted to send one small message to her on facebook through a friend of mines facebook. The message was short, no blaming, no begging, no crying, it was short and basically i told her how sorry i was and how i feel, and i left the ball in her court to reach out to me.. My sister sometimes talks to her and she says shes not ready to speak to me and she seen the picture after about a week of me and the other girl at the bar, and apparently she will write me back when she is ready but right now she isnt ready I cant handle this.. I want to talk to her.. there was no closure I dont know what to do.. its been 2 weeks like i said and im scared to get ahold of her because i dont want to push her away.. but like wtf am i suppose to do? she is the love of my life and before you judge me she had done something to really hurt me back in the past aswell but im not going to get into it.. lets just say i gave her a chance for something way worse and i feel like shes not giving me one because she has all her friends digging in her head giving her false advice her facebook status today (which i seen thru a friends account) says Day 14.. Still not quite right its been 14 days since we broke up.. and i know she is still thinking about me but holding back.. do you think she is trying to teach me a lesson or do you think she is really forcing herself away.. this no contact/no talking is killing me inside i feel like my bestfriend and other half of my life has vanished from my life within 1 day. and I didnt even get to explain myself someone please give me some real advice on how i should approach this.. ive explained as best as i can im running out of room PS we were together for a year and a half.. she is the love of my life and i cant just let her go please help me..
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yes and then a few months later she got her fiernd to dump me for her. Then in year 9 she went to school for about a month and then she stopped coming and i lost contact with her. Then after i moved i started emailing her and she emailed back and said that she wanted me back with me and i said yes and she texted me but i had no credit so i couldn’t write back. Then the Holiday’s came and so she stopped emailing me. Then she got a facebook account early this year i added her and she was going out with someone else, she forgot about me but when i added her she still wanted me more than him. So i asked her why don’t you dump him if you love me more and she said that she can’t break-up with guys, eventually she told him and he forced her to break-up with me and she did. I know she still loves me i still call her every now and then and see how she going she created a list of reason’s why i’m her best fiernd and she came up with 53 reason’s so far, she also created a list of reason’s why she hates her boyfriend and by the sounds of it he wants her to be a completely different person. She still says she loves him but i don’t know what to think, my fiernd is good at manipulating peoples minds and got her to say that she loves me, but i think she forgot about it, my fiernd is trying to help me and it’s almost working but i need some more help.I still love her more than anything and she was crying for about two days after the break-upI’m Hoping 3rd times the charm.Please help
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