This appears as both "SELECT @@SESSION.sql_mode" checked from wp-db.php
in Wordpress core during startup and as "SHOW VARIABLES LIKE 'sql_mode'"
in several extensions (all-in-one-seo-pack, flash-album-gallery, and
nextgen-gallery on my system). Support both by returning the empty
string, which reports the default MySQL behavior (and avoids attempts to
change the mode, since all current code expects this).
Signed-off-by: Kevin Locke <kevin@kevinlocke.name>
Wordpress 4 makes use of SHOW COLUMNS and SHOW TABLES in addition to
SHOW INDEX, both with and without the FULL modifier. Implement support
for these statements using queries against INFORMATION_SCHEMA.
Some of these queries use lower-case versions of these statements,
such as "show tables like 'wp_flag_pictures'", so we make sure to
recognize both the upper- and lower-case versions.
This is based, in part, on the work of raptorz in the support forum at
https://wordpress.org/support/topic/upgrade-to-wp421-fail?replies=3#post-6886123
Signed-off-by: Kevin Locke <kevin@kevinlocke.name>
The current rewriting changes "default '0000-00-00 00:00:00'" when it
appears in CREATE TABLE statements, but does not handle the case that a
column default value is modified. This results in errors such as the
following during schema upgrade:
Error running :
ALTER TABLE wp_users ALTER COLUMN user_registered SET DEFAULT '0000-00-00 00:00:00'
---- converted to ----
ALTER TABLE wp_users ALTER COLUMN user_registered SET DEFAULT '0000-00-00 00:00:00'
----> ERROR: date/time field value out of range: "0000-00-00 00:00:00"
Apply the conversion to ALTER TABLE statements as well.
Signed-off-by: Kevin Locke <kevin@kevinlocke.name>
