PHP pdo links to postgresql database. Json is used in where conditions to report errors.

  • has recently been using the json format of postgresql database and found that pdo query reported an error
  • the source code is as follows 
<?php

    // PDO
    $pdo = new PDO("pgsql:host=127.0.0.1;port=5432;dbname=postgres","postgres","");
    $statement = $pdo->prepare("select * from test where account::jsonb ? "111"");
    $statement->execute();
    var_dump($statement->errorInfo());
    $rs = $statement->fetch();
    var_dump($rs);
    
    //  
    $p = pg_connect("host=127.0.0.1 port=5432 dbname=postgres user=yluchao password=""");
    $rs = pg_query($p, "select * from test where account::jsonb ? "111"");
    var_dump(pg_fetch_all($rs));



/*create table test
(
  id bigserial primary key,
  account jsonb not null default "{}",
  name varchar(255) not null default ""
);*/

if the figure uses pdo query to report errors, you can query

using native pgsql links.
Php postgresql
Mar.16,2021 
    PDO test 
    // PDO
    $pdo = new PDO("pgsql:host=127.0.0.1;port=5432;dbname=postgres","postgres","");
    $statement = $pdo->prepare("select * from test where account = ?");
    $statement->execute(array(111));
    var_dump($statement->errorInfo());
    $rs = $statement->fetch();
    var_dump($rs);

including ? in PDO::prepare in PHP means it is a placeholder. You won't have this problem by using PDO::query directly.

in fact, the official reply to this question has long been: https://bugs.php.net/bug.php?.

.

solution: turn off local simulation preprocessing 

$pdo = new PDO(...);
$pdo->setAttribute(\PDO::ATTR_EMULATE_PREPARES ,false);

or 

$pdo->prepare($sql,[\PDO::ATTR_EMULATE_PREPARES=>false]);

http://php.net/manual/en/pdo.

PHP enables local emulation by default. When ATTR_EMULATE_PREPARES is closed, the prepare operation is sent to the database server to perform the operation.

Previous: How to set the primary key self-increment when creating a table in a postgresql database using navicat?

Next: Raspberry pie can't get into the system.

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1c11d77-32d9b.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1c11d77-32d9b.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?