Syntax error at end of input in PostgreSQL

I have used the next SQL statement in both MySQL and PostgreSQL, but it fails in PostgreSQL

db.Query(`SELECT COUNT(*) as N FROM email WHERE address = ?`, email)

with this error:

pq: F:"scan.l" M:"syntax error at end of input" S:"ERROR" C:"42601" P:"50" R:"scanner_yyerror" L:"993"

What's the problem? The error messages in PostgreSQL are very cryptic.

You haven't provided any details about the language/environment, but I'll try a wild guess anyway:

MySQL's prepared statements natively use ? as the parameter placeholder, but PostgreSQL uses $1, $2 etc. Try replacing the ? with $1 and see if it works:

WHERE address = $1

> The error messages in PostgreSQL are very cryptic.

In general, I've found that Postgres error messages are better than competing products (ahem, MySQL and especially Oracle), but in this instance you've managed to confuse the parser beyond sanity.

In golang for queries we have use

• MySQL uses the ? variant
• PostgreSQL uses an enumerated $1, $2, etc bindvar syntax
• SQLite accepts both ? and $1 syntax
• Oracle uses a :name syntax

You are using Go right?

try:

db.Query(`SELECT COUNT(*) as N FROM email WHERE address = $1`, email)

In my case, it was due to using a -- line comment where the program that was responsible for interacting with the database read in the multiple lines of my query all as one giant line. This meant that the line comment corrupted the remainder of the query. The fix was to use a /* block comment */ instead.

Another possibility - check for any missing END directives for IF, LOOP, etc.

I'd been working in a loop so long, that I didn't realize I never put in an END LOOP;.

The message that Postgres displays:

ERROR:  syntax error at end of input
LINE 123: $$;

is terribly unhelpful at telling you if some construct was never closed.