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My MySQL prepared statement won't work


By : Lani Locke
Date : October 18 2020, 03:08 PM
it helps some times You need to apply bind_result and then fetch
Also there is absolutely no reason to escape_string when using prepared statements as @GrumpyCrouton said
code :


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inner join wont work with mysqli prepared statement in php


By : user2869377
Date : March 29 2020, 07:55 AM
Hope that helps The placeholder ? does not work if enclosed in single quotes. In this case the SQL tokenizer will catch it as literal string.
Change it to:
code :
     WHERE t.tag_name = ? ");

PDO prepared statement wont work with this query


By : Srii
Date : March 29 2020, 07:55 AM
Hope that helps You mix up methods for prepared statements and simple queries. The bindParam() method just relates to prepared statements. On its own, the query() method tries to execute the given query immediately, which fails, because the parameters have not been substituted.
To solve this, just change to prepared statements all along by using
code :
$query = $db->prepare("SELECT ... " );
$query->exec();

Sending NULL in a prepared statement for MySQL doesn't seem to work


By : Polla318
Date : March 29 2020, 07:55 AM
this one helps. Your null-bitmap is wrong. Should be 01 and not 80.
From the doc:
code :
NULL-bitmap-bytes = (num-fields + 7 + offset) / 8
NULL-bitmap-byte = ((field-pos + offset) / 8)
NULL-bitmap-bit  = ((field-pos + offset) % 8)
NULL-bitmap-bytes = (num-fields + 7 + offset) / 8
  -> (2 + 7 + 0) / 8
  == 1

NULL-bitmap-byte = ((field-pos + offset) / 8)
  -> ((0 + 0) / 8)
  == 0

NULL-bitmap-bit  = ((field-pos + offset) % 8)
  -> ((0 + 0) % 8)
  == 0
nulls[byte_pos] |= 1 << bit_pos
nulls[0] |= 1 << 0;

PHP MYSQL : insert dont work with prepared statement


By : helyao
Date : March 29 2020, 07:55 AM
I wish this help you It appears that you are mixing PDO with mysqli and the two are not able to work with each other.

MySQL Stored Procedure with Prepared Statement does not work


By : user2672823
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I have the following stored procedure: , You need to add some spaces in there:
code :
SET @query = CONCAT('SELECT * FROM automatic_changes WHERE ',fieldName,' IS NOT NULL AND P_id=?');
/*                                                  right ^ here....and ^ here*/
SELECT * FROM automatic_changes WHEREcolumnameIS NOT NULL AND P_id='whatever';
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