[Solved] You run the following command:ALTER TEXT SEARCH CONFIGURATION my_config ALTER MAPPING FOR word WITH english_stem;But you get an error: ERROR:... | PostgreSQL

PostgreSQL - Full-Text Search

You run the following command:

ALTER TEXT SEARCH CONFIGURATION my_config
  ALTER MAPPING FOR word WITH english_stem;

But you get an error: ERROR: dictionary "english_stem" does not exist
What is the most likely cause?

AThe configuration name is reserved and cannot be changed

BALTER MAPPING cannot be used on existing configurations

CYou must drop the configuration before altering it

DThe dictionary name is misspelled or not created

Step-by-Step Solution

Solution:

Step 1: Analyze error message
The error says the dictionary "english_stem" does not exist, indicating PostgreSQL cannot find that dictionary.
Step 2: Identify cause
Most likely, the dictionary name is misspelled or the dictionary was never created in the database.
Final Answer:
The dictionary name is misspelled or not created -> Option D
Quick Check:
Dictionary must exist before use [OK]

Quick Trick: Check dictionary exists before ALTER MAPPING [OK]

Common Mistakes:

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You run the following command: