Re: Create and access a dictionary type
>> >> Well, yes - you can always decompose the dict and store it in an EAV, but >> sometimes it's more convenient to just use "nested" dictionary at the row >> level. Which is what a JSONB column does. > > Edgar Codd is rolling in his grave. > > Contributing mightily to the global angular momentum, for sure. > -- > Angular momentum makes the world go 'round.
Re: Create and access a dictionary type
On 1/5/22 10:35 AM, Tomas Vondra wrote: On 1/5/22 17:24, Ron wrote: On 1/5/22 7:22 AM, Tomas Vondra wrote: On 1/5/22 14:17, Shaozhong SHI wrote: Any examples in Postgres to create a dictionary type to store and access key value pairs? I'd say JSONB can be used as an associative array, and e.g. in Python can map to dict data type. The question confuses me. Why isn't "create a table with Primary Key" the answer to "Any examples in Postgres to create a dictionary type to store and access key value pairs?" Well, yes - you can always decompose the dict and store it in an EAV, but sometimes it's more convenient to just use "nested" dictionary at the row level. Which is what a JSONB column does. Edgar Codd is rolling in his grave. -- Angular momentum makes the world go 'round.
Re: Create and access a dictionary type
On 1/5/22 14:36, Shaozhong SHI wrote: I just checked operators. I could not find any operator to set a new value given a key. I'd say jsonb_set is what you're looking for. Postgres does not have a thing that'd match the Oracle feature exactly, you'll have to adjust your application to use what's available. regards -- Tomas Vondra EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
Re: Create and access a dictionary type
On 1/5/22 17:24, Ron wrote: On 1/5/22 7:22 AM, Tomas Vondra wrote: On 1/5/22 14:17, Shaozhong SHI wrote: Any examples in Postgres to create a dictionary type to store and access key value pairs? I'd say JSONB can be used as an associative array, and e.g. in Python can map to dict data type. The question confuses me. Why isn't "create a table with Primary Key" the answer to "Any examples in Postgres to create a dictionary type to store and access key value pairs?" Well, yes - you can always decompose the dict and store it in an EAV, but sometimes it's more convenient to just use "nested" dictionary at the row level. Which is what a JSONB column does. regards -- Tomas Vondra EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
Re: Create and access a dictionary type
On 1/5/22 7:22 AM, Tomas Vondra wrote: On 1/5/22 14:17, Shaozhong SHI wrote: Any examples in Postgres to create a dictionary type to store and access key value pairs? I'd say JSONB can be used as an associative array, and e.g. in Python can map to dict data type. The question confuses me. Why isn't "create a table with Primary Key" the answer to "Any examples in Postgres to create a dictionary type to store and access key value pairs?" -- Angular momentum makes the world go 'round.
Re: Create and access a dictionary type
I just checked operators. I could not find any operator to set a new value given a key. Regards, David On Wed, 5 Jan 2022 at 13:22, Tomas Vondra wrote: > On 1/5/22 14:17, Shaozhong SHI wrote: > > Any examples in Postgres to create a dictionary type to store and access > > key value pairs? > > > > I'd say JSONB can be used as an associative array, and e.g. in Python > can map to dict data type. > > > regards > > -- > Tomas Vondra > EnterpriseDB: http://www.enterprisedb.com > The Enterprise PostgreSQL Company >
Re: Create and access a dictionary type
On 1/5/22 14:17, Shaozhong SHI wrote: Any examples in Postgres to create a dictionary type to store and access key value pairs? I'd say JSONB can be used as an associative array, and e.g. in Python can map to dict data type. regards -- Tomas Vondra EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
Create and access a dictionary type
Any examples in Postgres to create a dictionary type to store and access key value pairs? Regards, David
