PostgreSQL中的insert…select语句将php中的插入值与select语句组合在一起

Question

I have seen some SO posts on how to insert selected values, but they are always in cases where all inserted values will come from the select statement. I am struggling to insert data that is partially provided by a php call and partially provided by a select statement. Here is what I would like to do:

$query = "INSERT INTO deals (latitude, longitude, interested, id, the_geom) VALUES ($1, $2, $3, $4, SELECT the_geom FROM userlocs WHERE id=$3)";
$rs = pg_query_params($con, $query, array($latitudeS, $longitudeS, $id_pg , $id_add));

This is giving me the following not very helpful error:

 pg_query_params(): Query failed: ERROR: syntax error at or near "SELECT" LINE 1: ...interested, id, the_geom) VALUES ($1, $2, $3, $4, SELECT the... ^ in /var/www/html/join.php on line 30

Is it possible to do what I would like to do? If so, how do I modify my syntax?

Many thanks for any suggestions.

Answer 1

Probably the easiest fix is to just put your SELECT statement in parentheses

INSERT INTO deals (latitude, longitude, interested, id, the_geom) 
VALUES ($1, $2, $3, $4, (SELECT the_geom FROM userlocs WHERE id = $3))

Here is a SQLFiddle demo

Depending on whether you always expect a value coming from userlocs or not you can also use INSERT ... SELECT syntax in one of two ways

INSERT INTO deals (latitude, longitude, interested, id, the_geom) 
SELECT $1, $2, $3, $4, the_geom FROM userlocs WHERE id = $3

or

INSERT INTO deals (latitude, longitude, interested, id, the_geom) 
SELECT $1, $2, $3, $4, (SELECT the_geom FROM userlocs WHERE id = $3)