plpythonu how to pass a text array to a plpythonu function
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PL/Python is a procedural language extension for PostgreSQL that allows you to write stored procedures and triggers in Python. In this tutorial, I'll guide you through the process of passing a text array to a PL/Python function in PostgreSQL.
Let's start by creating a simple PL/Python function that takes a text array as an argument and prints each element of the array. Make sure you have PL/Python installed and enabled in your PostgreSQL database.
If you haven't already, you need to enable PL/Python in your PostgreSQL database. You can do this by running the following SQL command:
Now, let's create a PL/Python function that takes a text array as a parameter and prints each element. We'll name the function print_text_array.
In this example, the function iterates over each element of the text array and logs it using plpy.info. You can replace the logging with any other logic you need.
Now, let's test our PL/Python function with a sample text array.
This should print each element of the array in the PostgreSQL log.
To pass a text array from a PostgreSQL query to our PL/Python function, you can use the following syntax:
Replace the array elements with the actual text you want to pass to the function.
Modify the PL/Python function to perform the desired logic with the text array. Here's an example that concatenates all elements of the array into a single string:
Now, you can use this function in a query like this:
This should return a single string containing the concatenated elements of the array.
That's it! You've successfully created a PL/Python function that takes a text array as a parameter in PostgreSQL. Feel free to adapt the examples to suit your specific use case.
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