Re: Why is table not found?

On Tue, Jan 31, 2017 at 7:45 AM, Egon Frerich <egon(at)frerich(dot)eu> wrote:

>
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> I created a db 'Hausrat' with a table "Raum". If I look in pgadmin I
> find the the table. In sql field is shown:
>
> > -- Table: "Raum"
> >
> > -- DROP TABLE "Raum";
> >
> > CREATE TABLE "Raum"
> > (
> > "RaumID" serial NOT NULL, -- Automatisch vergebenes
> Identifizierungsmerkmal für den Raum
> > "Raum" character varying(15), -- Bezeichnung des Raums
> > CONSTRAINT "Raum_pkey" PRIMARY KEY ("RaumID")
> > )
> > WITH (
> > OIDS=FALSE
> > );
> > ALTER TABLE "Raum"
> > OWNER TO egon;
> > COMMENT ON COLUMN "Raum"."RaumID" IS 'Automatisch vergebenes
> Identifizierungsmerkmal für den Raum';
> > COMMENT ON COLUMN "Raum"."Raum" IS 'Bezeichnung des Raums';
> >
> >
> > -- Index: "Raum_RaumID_idx"
> >
> > -- DROP INDEX "Raum_RaumID_idx";
> >
> > CREATE INDEX "Raum_RaumID_idx"
> > ON "Raum"
> > USING btree
> > ("RaumID");
> >
> But psql tells me "Raum" is not existent:
>
> > egon(at)xfEinzel ~ $ psql Hausrat
> > psql (9.3.15)
> > Type "help" for help.
> >
> > Hausrat=# SELECT * FROM Raum;
> > ERROR: relation "raum" does not exist
> > LINE 1: SELECT * FROM Raum;
> > ^
> > Hausrat=#
>
> Why?
>

​Because, "Raum" is not equal to Raum. This is because, when a name is not
enclosed in " marks, PostgreSQL will force it to be lower case. So "Raum"
is mixed cased, as you would expect. But Raum is basically converted to
"raum".​
ref:
https://www.postgresql.org/docs/9.5/static/sql-syntax-lexical.html#SQL-SYNTAX-IDENTIFIERS

>
> Egon
>
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