Description:
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Actually using PHP 5.4.0.3 but this was not in the drop down list above.

Null is a perfectly valid value for a column. However, PHP fails to submit the correct values when it builds the SQL query and submits it to the postmaster.
I don't have this problem with Java and the Postgres jdbc driver.
Consider the following DDL:-

create table table_a (
tablea_id serial not null primary key,
col_a varchar(20),
col_b integer,
col_c boolean default false);

In my class for table_a I have:-

update table_a set col_a = 'this->colA', col_b = this->colB,
col_c = this->colC where tablea_id = $something;

In my action I might set a value -- setcolA('some value');
If this->colB IS NULL, then PHP doesn't detect this fact, generates the following SQL which fails because of syntax errors.

update table_a set col_a = 'some value', col_b = , col_c = where tablea_id = 3;

It should generate:-

update table_a set col_a = 'some value', col_b = null, col_c = null where tablea_id = 3;

The failure to detect boolean's and treat them appropriately is another pain in the neck. You are using pg_query, you KNOW it's a Postgres database, you should KNOW that Postgres creates boolean columns as char(1), and that it uses a 't' to represent "true" and a 'f' to represent "false".
To overcome this failure I had to do the following in my class:-

$my_bool = this->colC? 't' : 'f';

and then use '$my_bool' instead of this->colC in the insert and update statements.

Imagine if you had dozens of boolean type columns in a table. A nightmare. It is quite common in applications where users belong to groups and a group has a set of privileges, and those privileges are usually held as boolean value's.



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From manual page: http://www.php.net/function.pg-query#refsect1-function.pg-query-description
---


Actual result:
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[Thu Jun 21 02:50:31 2012] [error] [client 127.0.0.1] PHP Warning:  pg_query(): Query failed: ERROR:  syntax error at or near ","\nLINE 5:            '', 'Kemly plus vistors to look at house', , 0,\n                                                              ^ in /var/www/timemanager.info/public_html/classes/AppointMents.php on line 133, referer: http://dev.timemanager.info/addchgappnts.html