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How can SQL/PLSQL blocks be stripped of their comments?

asked 2021-12-01 11:00:00 +0000

woof gravatar image

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answered 2022-06-05 13:00:00 +0000

djk gravatar image

SQL/PLSQL blocks can be stripped of their comments by using regular expressions in a text editor or a scripting language. Here is an example of how to do it using Python:

import re

# SQL/PLSQL block with comments
block = '''
/*
This is a comment
*/
SELECT * FROM customers; -- This is another comment
'''

# Regular expression to match comments
comment_pattern = r'(--.*)|(/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+/)'

# Remove comments using regular expression substitution
block_without_comments = re.sub(comment_pattern, '', block)

print(block_without_comments) # Output: SELECT * FROM customers;

The regular expression comment_pattern matches both single-line comments (starting with --) and multi-line comments (starting with /* and ending with */). The re.sub function replaces all matches with an empty string, effectively removing the comments from the SQL/PLSQL block.

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Asked: 2021-12-01 11:00:00 +0000

Seen: 18 times

Last updated: Jun 05 '22