how to parse json using json_populate_recordset in postgres

The first argument passed to pgsql function json_populate_recordsetshould be a row type. If you want to use the json array to populate the existing table anoop you can simply pass the table anoop as the row type like this: insert into anoop select * from json_populate_recordset(null::anoop, ‘[{“id”:67272,”name”:”EE_Quick_Changes_J_UTP.xlsx”}, {“id”:67273,”name”:”16167.txt”}, {“id”:67274,”name”:”EE_12_09_2013_Bcum_Searchall.png”}]’); Here the null is the default … Read more

Access PostgreSQL server from LAN

First, edit the postgresql.conf file, and set listen_addresses. The default value of ‘localhost’ will only listen on the loopback adaptor. You can change it to ‘*’, meaning listen on all addresses, or specifically list the IP address of the interfaces you want it to accept connections from. Note that this is the IP address which … Read more

Can we create a column of character varying(MAX) with PostgreSQL database

If you want to created an “unbounded” varchar column just use varchar without a length restriction. From the manual: If character varying is used without length specifier, the type accepts strings of any size So you can use: create table foo ( unlimited varchar ); Another alternative is to use text: create table foo ( … Read more

Are postgres JSON indexes efficient enough compared with classic normalized tables?

I will need some queries in the form “list all objects where one of altnames is ‘foobar’.” The expected table size is on the order of a few million records. Postgres JSON queries can be used for that, and it can also be indexed (Index For Finding Element in JSON array, for example). However, SHOULD … Read more

In pg_restore, how can you use a postgres connection string to specify the host/database/username/password?

In PostgreSQL tools wherever you can specify a database name you can instead specify a connection string. In the syntax for pg_restore the dbname is passed with a flag, not as a positional parameter: $ pg_restore –help pg_restore restores a PostgreSQL database from an archive created by pg_dump. Usage: pg_restore [OPTION]… [FILE] General options: -d, … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)