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>
Kevin Locke
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