PREPARE in bash scripts
| От | A.j. Langereis |
|---|---|
| Тема | PREPARE in bash scripts |
| Дата | |
| Msg-id | 00e801c5ec5b$45b78000$3e01a8c0@aarjan2 обсуждение исходный текст |
| Список | pgsql-general |
Dear all,
I've written a bash script that looks like the one below:
#!/bin/bash
DBuser='root'
DBname='test'
DBname='test'
psql -q --username=$DBuser --dbname=$DBname -c "prepare test_statement (integer) as insert into tbl_test (col_test) values (\\$1)";
tail -f /root/testfile | while read a;
do
psql -q --username=$DBuser --dbname=$DBname -c "execute test_statement ($a)";
done;
psql -q --username=$DBuser --dbname=$DBname -c "deallocate test_statement";
Note that this is very stripped version of the real script, but it gives the same errors:
ERROR: prepared statement "test_statement" does not exist
I persume that this is caused because of the individual statements, each using their own session. But is there a way to avoid this?
In reality the statement that is prepared is much more complex, and the files that are processed are rather big. I hoped to gain more performance by preparing the statement.
Your sincerely,
Aarjan Langereis
Ps. The bash script is ran on an Fedora Core 3 machine using PostgreSQL 8.1.0
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