日期格式在使用Informix的PHP查询中失败（基于SQL）

Question

I'm running a service which (should) returns a json with a response from a sql query to fill a table. For debugging purposes i've added the resulting query string to the response to try it directly on the database and the query works in my database. Actually im getting the following errors when i run it from my service and i need to solve this:

Invalid year in date. When i go for "and table.datefield >= '".$date."'

Invalid month in date. When using "and table.datefield >= {d'".$date."'}

Both with HY000 error code. (Description below)

SQLSTATE[HY000]: General error: -1204 [Informix][Informix ODBC Driver][Informix]Invalid year in date (SQLPrepare[-1204] at /usr/PRODUCTO/apache_jano/PDO_INFORMIX-1.3.3/informix_driver.c:131) ISAM: 264

SQLSTATE[HY000]: General error: -1205 [Informix][Informix ODBC Driver][Informix]Invalid month in date (SQLPrepare[-1205] at /usr/PRODUCTO/apache_jano/PDO_INFORMIX-1.3.3/informix_driver.c:131) ISAM: 264

At some point the 2nd option from above worked (it detects the year so i think its the closest approach), but it doesnt anymore. I can't either find the place where i found the {d } documentation so (which solved it in the past), any link would also be appreciated. One more thing i cant use bind_params for this (I've been explicitly told to do it without this).

This is part which is failing (deleting this condition in my query works perfect)

SQL code condition which works in dbeaver and taken from response string:

 AND (

(table.fecha_inicial <= { d '2018-07-15' }AND (table.fecha_final >= { d '2019-07-15' }OR table.fecha_final IS NULL))

OR 

(table.fecha_inicial >= { d '2018-07-15' }AND (table.fecha_final <= { d '2019-07-15' } OR table.fecha_final IS NULL)))

PHP coding

    if ($fechaInicio){ $fechaInicio = date('Y-m-d',     strtotime($fechaInicio));}
    if ($fechaFin){ $fechaFin = date('Y-m-d', strtotime($fechaFin));}
    $cond_fechas = " AND ( (table.fecha_inicial     <= '".$fechaInicio."' AND (table.fecha_final >= {d'".$fechaFin."'}     OR table.fecha_final IS NULL)) "
                    . " OR (table.fecha_inicial     >= '".$fechaInicio."' AND (table.fecha_final <= {d'".$fechaFin."'}     OR table.fecha_final IS NULL)))";


 $result['query'] = $query;
 $conn = DB::getConnection('bbdd');
 $result['das']= $conn->preparedQuery($query);

if (isset($result['das'])) {
   return JwtCheckHeader::json($result['das']);
} else {
   return JwtCheckHeader::json($result);
}

Answer 1

Ok i found the issue here. It should return some error of "no results matching your conditions" instead of the "format_error" which mislead me completely.

This error happened when comparing some of the db empty date strings in database with the dates provided.

It fails when no data meets and success when the dates provided meet requirements, so it works! Hope it will help somebody else in the future.