Cannot simply use PostgreSQL table name ("relation does not exist")
PhpSqlPostgresqlQuoted IdentifierPhp Problem Overview
I'm trying to run the following PHP script to do a simple database query:
$db_host = "localhost";
$db_name = "showfinder";
$username = "user";
$password = "password";
$dbconn = pg_connect("host=$db_host dbname=$db_name user=$username password=$password")
or die('Could not connect: ' . pg_last_error());
$query = 'SELECT * FROM sf_bands LIMIT 10';
$result = pg_query($query) or die('Query failed: ' . pg_last_error());
This produces the following error:
> Query failed: ERROR: relation "sf_bands" does not exist
In all the examples I can find where someone gets an error stating the relation does not exist, it's because they use uppercase letters in their table name. My table name does not have uppercase letters. Is there a way to query my table without including the database name, i.e. showfinder.sf_bands
?
Php Solutions
Solution 1 - Php
From what I've read, this error means that you're not referencing the table name correctly. One common reason is that the table is defined with a mixed-case spelling, and you're trying to query it with all lower-case.
In other words, the following fails:
CREATE TABLE "SF_Bands" ( ... );
SELECT * FROM sf_bands; -- ERROR!
Use double-quotes to delimit identifiers so you can use the specific mixed-case spelling as the table is defined.
SELECT * FROM "SF_Bands";
Re your comment, you can add a schema to the "search_path" so that when you reference a table name without qualifying its schema, the query will match that table name by checked each schema in order. Just like PATH
in the shell or include_path
in PHP, etc. You can check your current schema search path:
SHOW search_path
"$user",public
You can change your schema search path:
SET search_path TO showfinder,public;
See also http://www.postgresql.org/docs/8.3/static/ddl-schemas.html
Solution 2 - Php
I had problems with this and this is the story (sad but true) :
-
If your table name is all lower case like : accounts you can use:
select * from AcCounTs
and it will work fine -
If your table name is all lower case like :
accounts
The following will fail:select * from "AcCounTs"
-
If your table name is mixed case like :
Accounts
The following will fail:select * from accounts
-
If your table name is mixed case like :
Accounts
The following will work OK:select * from "Accounts"
I dont like remembering useless stuff like this but you have to ;)
Solution 3 - Php
Postgres process query different from other RDMS. Put schema name in double quote before your table name like this, "SCHEMA_NAME"."SF_Bands"
Solution 4 - Php
Put the dbname parameter in your connection string. It works for me while everything else failed.
Also when doing the select, specify the your_schema
.your_table
like this:
select * from my_schema.your_table
Solution 5 - Php
I had a similar problem on OSX but tried to play around with double and single quotes. For your case, you could try something like this
$query = 'SELECT * FROM "sf_bands"'; // NOTE: double quotes on "sf_Bands"
Solution 6 - Php
If a table name contains underscores or upper case, you need to surround it in double-quotes.
SELECT * from "Table_Name";
Solution 7 - Php
You must write schema name and table name in qutotation mark. As below:
select * from "schemaName"."tableName";
Solution 8 - Php
This is realy helpfull
SET search_path TO schema,public;
I digged this issues more, and found out about how to set this "search_path" by defoult for a new user in current database.
Open DataBase Properties then open Sheet "Variables" and simply add this variable for your user with actual value.
So now your user will get this schema_name by defoult and you could use tableName without schemaName.
Solution 9 - Php
For me the problem was, that I had used a query to that particular table while Django was initialized. Of course it will then throw an error, because those tables did not exist. In my case, it was a get_or_create
method within a admin.py file, that was executed whenever the software ran any kind of operation (in this case the migration). Hope that helps someone.
Solution 10 - Php
I had the same issue as above and I am using PostgreSQL 10.5. I tried everything as above but nothing seems to be working.
Then I closed the pgadmin and opened a session for the PSQL terminal. Logged into the PSQL and connected to the database and schema respectively :
\c <DATABASE_NAME>;
set search_path to <SCHEMA_NAME>;
Then, restarted the pgadmin console and then I was able to work without issue in the query-tool of the pagadmin.
Solution 11 - Php
In addition to Bill Karwin's answer =>
Yes, you should surround the table name with double quotes
. However, be aware that most probably php will not allow you to just write simply:
$query = "SELECT * FROM "SF_Bands"";
Instead, you should use single quotes
while surrounding the query as sav said.
$query = 'SELECT * FROM "SF_Bands"';
Solution 12 - Php
Easiest workaround is Just change the table name and all column names to lowercase and your issue will be resolved.
For example:
- Change
Table_Name
totable_name
and - Change
ColumnName
tocolumnname
Solution 13 - Php
You have to add the schema first e.g.
SELECT * FROM place.user_place;
If you don't want to add that in all queries then try this:
SET search_path TO place;
Now it will works:
SELECT * FROM user_place;
Solution 14 - Php
It might be silly for a few, but in my case - once I created the table I could able to query the table on the same session, but if I relogin with new session table does not exits
.
Then I used commit
just after creating the table and now I could able to find and query the table in the new session as well. Like this:
select * from my_schema.my_tbl;
Hope this would help a few.
Solution 15 - Php
Solution 16 - Php
I tried every good answer ( upvote > 10) but not works.
I met this problem in pgAdmin4.
so my solution is quite simple: