Is it possible to use multiple databases within same query using pg-promise?
I have two related tables T1 and T2 in different databases D1 and D2. I need to do an inner join between two tables.
From here: Joining Results from Two Separate Databases it is clear that separate queries should be made to two databases and results to be consolidated on client side OR use dblink / postgres-fdw.
However, I see this issue: Multiple Databases #1
and the use of $dc parameter here: pg-promise/Database.
I believe issue: Multiple Databases #1
just facilitates allowing connecting to multiple databases within the same codebase.
The description of $dc parameter states:
This is mainly to facilitate the use of multiple databases which may need separate protocol extensions, or different implementations within a single task
However, I did not find any examples.
Is the $dc paramter just a database context object that can be accessed, or would it allow to do an inner join between two different databases?
Is there a way to do utilise two database connections but do a join across databases in without having to do it on client-side using pg-promise?
node.js postgresql pg-promise
asked Nov 24 '18 at 8:48
Naisheel VerdhanNaisheel Verdhan
2,5331127
add a comment |
I have two related tables T1 and T2 in different databases D1 and D2. I need to do an inner join between two tables.
From here: Joining Results from Two Separate Databases it is clear that separate queries should be made to two databases and results to be consolidated on client side OR use dblink / postgres-fdw.
However, I see this issue: Multiple Databases #1
and the use of $dc parameter here: pg-promise/Database.
I believe issue: Multiple Databases #1
just facilitates allowing connecting to multiple databases within the same codebase.
The description of $dc parameter states:
This is mainly to facilitate the use of multiple databases which may need separate protocol extensions, or different implementations within a single task
However, I did not find any examples.
Is the $dc paramter just a database context object that can be accessed, or would it allow to do an inner join between two different databases?
Is there a way to do utilise two database connections but do a join across databases in without having to do it on client-side using pg-promise?
node.js postgresql pg-promise
asked Nov 24 '18 at 8:48
Naisheel VerdhanNaisheel Verdhan
2,5331127
add a comment |
I have two related tables T1 and T2 in different databases D1 and D2. I need to do an inner join between two tables.
From here: Joining Results from Two Separate Databases it is clear that separate queries should be made to two databases and results to be consolidated on client side OR use dblink / postgres-fdw.
However, I see this issue: Multiple Databases #1
and the use of $dc parameter here: pg-promise/Database.
I believe issue: Multiple Databases #1
just facilitates allowing connecting to multiple databases within the same codebase.
The description of $dc parameter states:
This is mainly to facilitate the use of multiple databases which may need separate protocol extensions, or different implementations within a single task
However, I did not find any examples.
Is the $dc paramter just a database context object that can be accessed, or would it allow to do an inner join between two different databases?
Is there a way to do utilise two database connections but do a join across databases in without having to do it on client-side using pg-promise?
node.js postgresql pg-promise
asked Nov 24 '18 at 8:48
Naisheel VerdhanNaisheel Verdhan
2,5331127
I have two related tables T1 and T2 in different databases D1 and D2. I need to do an inner join between two tables.
From here: Joining Results from Two Separate Databases it is clear that separate queries should be made to two databases and results to be consolidated on client side OR use dblink / postgres-fdw.
However, I see this issue: Multiple Databases #1
and the use of $dc parameter here: pg-promise/Database.
I believe issue: Multiple Databases #1
just facilitates allowing connecting to multiple databases within the same codebase.
The description of $dc parameter states:
This is mainly to facilitate the use of multiple databases which may need separate protocol extensions, or different implementations within a single task
However, I did not find any examples.
Is the $dc paramter just a database context object that can be accessed, or would it allow to do an inner join between two different databases?
Is there a way to do utilise two database connections but do a join across databases in without having to do it on client-side using pg-promise?
node.js postgresql pg-promise
node.js postgresql pg-promise
asked Nov 24 '18 at 8:48
Naisheel VerdhanNaisheel Verdhan
2,5331127
asked Nov 24 '18 at 8:48
Naisheel VerdhanNaisheel Verdhan
2,5331127
asked Nov 24 '18 at 8:48
Naisheel VerdhanNaisheel Verdhan
2,5331127
asked Nov 24 '18 at 8:48
Naisheel VerdhanNaisheel Verdhan
2,5331127
asked Nov 24 '18 at 8:48
Naisheel VerdhanNaisheel Verdhan
2,5331127
2,5331127
add a comment |
add a comment |
1 Answer
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Is the $dc paramter just a database context object that can be accessed, or would it allow to do an inner join between two different databases?
It is the former.
Is there a way to do utilise two database connections but do a join across databases in without having to do it on client-side using pg-promise?
No. Each Database object represents only a single connection to A database.
Database Context is there to allow re-use of tasks, transactions and protocol extensions across multiple Database objects, by relying on its value.
answered Nov 24 '18 at 9:51
vitaly-tvitaly-t
11k34770
add a comment |
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1 Answer
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1 Answer
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Is the $dc paramter just a database context object that can be accessed, or would it allow to do an inner join between two different databases?
It is the former.
Is there a way to do utilise two database connections but do a join across databases in without having to do it on client-side using pg-promise?
No. Each Database object represents only a single connection to A database.
Database Context is there to allow re-use of tasks, transactions and protocol extensions across multiple Database objects, by relying on its value.
answered Nov 24 '18 at 9:51
vitaly-tvitaly-t
11k34770
add a comment |
Is the $dc paramter just a database context object that can be accessed, or would it allow to do an inner join between two different databases?
It is the former.
Is there a way to do utilise two database connections but do a join across databases in without having to do it on client-side using pg-promise?
No. Each Database object represents only a single connection to A database.
Database Context is there to allow re-use of tasks, transactions and protocol extensions across multiple Database objects, by relying on its value.
answered Nov 24 '18 at 9:51
vitaly-tvitaly-t
11k34770
add a comment |
Is the $dc paramter just a database context object that can be accessed, or would it allow to do an inner join between two different databases?
It is the former.
Is there a way to do utilise two database connections but do a join across databases in without having to do it on client-side using pg-promise?
No. Each Database object represents only a single connection to A database.
Database Context is there to allow re-use of tasks, transactions and protocol extensions across multiple Database objects, by relying on its value.
answered Nov 24 '18 at 9:51
vitaly-tvitaly-t
11k34770
Is the $dc paramter just a database context object that can be accessed, or would it allow to do an inner join between two different databases?
It is the former.
Is there a way to do utilise two database connections but do a join across databases in without having to do it on client-side using pg-promise?
No. Each Database object represents only a single connection to A database.
Database Context is there to allow re-use of tasks, transactions and protocol extensions across multiple Database objects, by relying on its value.
answered Nov 24 '18 at 9:51
vitaly-tvitaly-t
11k34770
edited Nov 24 '18 at 10:51
answered Nov 24 '18 at 9:51
vitaly-tvitaly-t
11k34770
answered Nov 24 '18 at 9:51
vitaly-tvitaly-t
11k34770
answered Nov 24 '18 at 9:51
vitaly-tvitaly-t
11k34770
11k34770
add a comment |
add a comment |
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