mysql - phpMyAdmin affects zero rows but simulation affects 399 -


i running simulation of sql query:

update wp_posts  set    post_content = ( replace (post_content, 'src="http://', 'src="//') )  instr(post_content, 'jpeg') > 0          or instr(post_content, 'jpg') > 0          or instr(post_content, 'gif') > 0          or instr(post_content, 'png') > 0;

matched rows: 399

which matched 399 rows, when execute it, affects zero.

is there error don't see ??

kindly refer mysql manual update statement - tells...

if set column value has, mysql notices , not update it.

so, if run query, mysql understand value you're trying apply same current 1 specified column, , won't write database. reason getting 0 rows affected...


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