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The Lounge What is on Your Mind? Update on vB3 Migration to Discourse - Issues and Status of BBCode Transformations Post 303045639 by Neo on Sunday 5th of April 2020 10:39:09 AM
Old 04-05-2020
Well, as a update, this earlier MariaDB REGEX was flawed, my bad.

Code:
UPDATE post SET  pagetext= LOWER(REGEXP_REPLACE(pagetext,'\\[ATTACH\\](.*)\\[\\/ATTACH\\]', '[IMG]https://www.unix.com/attachment.php?attachmentid=\\1[/IMG]'));

Should have been

Code:
UPDATE post SET  pagetext= REGEXP_REPLACE(pagetext,'\\[ATTACH\\](.*?)\\[\\/ATTACH\\]', '[IMG]https://www.unix.com/attachment.php?attachmentid=\\1[/IMG]');

Using the LOWER directive not only worked on the REGEX, but on all text in the post, moving all text to lower case (unexpectedly). That will be fixed after 12 hours of rebaking the 1M posts.

In addition, my original REGEX was too greedy and I had to add the ? to make it less greedy. Somehow, I missed that during initial testing.

Thanks to @Peasant for catching that bug quickly today.

We are "mind warped" writing and rewriting all this (new to us) Ruby migration code. The extra eyes, fresh perspectives, and bug hunting all are much appreciated and valuable contributions to the final migration success (whenever that happens, LOL)
 

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PG_QUERY(3)															       PG_QUERY(3)

pg_query - Execute a query

SYNOPSIS
resource pg_query ([resource $connection], string $query) DESCRIPTION
pg_query(3) executes the $query on the specified database $connection. pg_query_params(3) should be preferred in most cases. If an error occurs, and FALSE is returned, details of the error can be retrieved using the pg_last_error(3) function if the connection is valid. Note Although $connection can be omitted, it is not recommended, since it can be the cause of hard to find bugs in scripts. Note This function used to be called pg_exec(3). pg_exec(3) is still available for compatibility reasons, but users are encouraged to use the newer name. PARAMETERS
o $connection - PostgreSQL database connection resource. When $connection is not present, the default connection is used. The default connection is the last connection made by pg_connect(3) or pg_pconnect(3). o $query - The SQL statement or statements to be executed. When multiple statements are passed to the function, they are automatically exe- cuted as one transaction, unless there are explicit BEGIN/COMMIT commands included in the query string. However, using multiple transactions in one function call is not recommended. Warning String interpolation of user-supplied data is extremely dangerous and is likely to lead to SQL injection vulnerabilities. In most cases pg_query_params(3) should be preferred, passing user-supplied values as parameters rather than substituting them into the query string. Any user-supplied data substituted directly into a query string should be properly escaped. RETURN VALUES
A query result resource on success or FALSE on failure. EXAMPLES
Example #1 pg_query(3) example <?php $conn = pg_pconnect("dbname=publisher"); if (!$conn) { echo "An error occurred. "; exit; } $result = pg_query($conn, "SELECT author, email FROM authors"); if (!$result) { echo "An error occurred. "; exit; } while ($row = pg_fetch_row($result)) { echo "Author: $row[0] E-mail: $row[1]"; echo "<br /> "; } ?> Example #2 Using pg_query(3) with multiple statements <?php $conn = pg_pconnect("dbname=publisher"); // these statements will be executed as one transaction $query = "UPDATE authors SET author=UPPER(author) WHERE id=1;"; $query .= "UPDATE authors SET author=LOWER(author) WHERE id=2;"; $query .= "UPDATE authors SET author=NULL WHERE id=3;"; pg_query($conn, $query); ?> SEE ALSO
pg_connect(3), pg_pconnect(3), pg_fetch_array(3), pg_fetch_object(3), pg_num_rows(3), pg_affected_rows(3). PHP Documentation Group PG_QUERY(3)
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