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What does FME consider a PostgreSQL dataset?
FME considers a PostgreSQL dataset to be a database containing a collection of relational tables together with their corresponding geometries. The tables must be defined in the workspace before they can be read.
Which is the default schema in PostgreSQL?
Failing a valid schema search path, the default public schema is used for newer databases. The PostgreSQL writer module stores both geometry and attributes into an PostgreSQL database. Note that attributes are always written as lowercase. The PostgreSQL writer provides the following capabilities:
What does the PostgreSQL Reader / Writer module do?
The PostgreSQL reader/writer module enables FME to read and write PostgreSQL attribute data. The PostgreSQL reader/writer is specifically designed to handle the attribute portion of the data in the database.
What do you need to know about reading from PostgreSQL?
When reading from the PostgreSQL database, each table is considered a feature type in FME and each row of a table at least one feature in FME. The basic reading process involves opening a connection to the database, querying metadata, and querying data.
How to delete active databases in PostgreSQL?
To delete the database that has active connections, you can follow these steps: First, find the activities associated with the database by querying the pg_stat_activity view: Second, terminate the active connections by issuing the following query:
Which is the most efficient way to delete rows from PostgreSQL?
I’m wondering what the most efficient way would be to delete large numbers of rows from PostgreSQL, this process would be part of a recurring task every day to bulk import data (a delta of insertions + deletions) into a table. There could be thousands, potentially millions of rows to delete.
What happens when you drop a database in PostgreSQL?
The DROP DATABASE statement deletes catalog entries and data directory permanently. This action cannot be undone so you have to use it with caution. Only superusers and the database owner can execute the DROP DATABASE statement. In addition, you cannot execute the DROP DATABASE statement if the database still has active connections.