Thread: PQexecParams and "SET TIME ZONE $1" gets 'syntax error at or near "$1" at character 15'

PQexecParams and "SET TIME ZONE $1" gets 'syntax error at or near "$1" at character 15'

From

Date:

23 November, 21:01:04

I get get this same error

syntax error at or near "$1" at character 15

if I feed "const char *command" with the following texts.

SET TIME ZONE $1
SET TIME ZONE $1::TEXT

For some reasons, I can not add quotes around $1 as follows.

SET TIME ZONE '$1'
SET TIME ZONE '$1'::TEXT

Statements like "SELECT ... WHERE $1=..." have been working flawlessly.

It looks like PQexecParams doesn't handle statement with "SET ... $1".

Are there workarounds for me or PQexecParams needs improvement?

Thank you!

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Re: PQexecParams and "SET TIME ZONE $1" gets 'syntax error at or near "$1" at character 15'

From

Pavel Stehule

Date:

23 November, 21:57:49

so 23. 11. 2024 v 16:01 odesílatel <ma.sao@msa.hinet.net> napsal:

I get get this same error

syntax error at or near "$1" at character 15

if I feed "const char *command" with the following texts.
SET TIME ZONE $1
SET TIME ZONE $1::TEXT
For some reasons, I can not add quotes around $1 as follows.
SET TIME ZONE '$1'
SET TIME ZONE '$1'::TEXT
Statements like "SELECT ... WHERE $1=..." have been working flawlessly.

It looks like PQexecParams doesn't handle statement with "SET ... $1".
Are there workarounds for me or PQexecParams needs improvement?

This statement has no plan, and then doesn't support parametrization.

you can use a function set_config instead https://www.postgresql.org/docs/current/functions-admin.html#FUNCTIONS-ADMIN-SET

SELECT set_config('timezone', $1, false)

Regards

Pavel

Thank you!
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