Purpose
Compares source_string to regexp_string and returns integer value.
REGEXP_SIMILAR supports 2 or 3 parameters.
Syntax
- TD_SYSFNLIB.
- Name of the database where the function is located.
-
source_string
- A character argument.
- If source_string is NULL, NULL is returned.
-
regexp_string
- A character argument.
- If regexp_string is NULL, NULL is returned.
-
match_arg
-
A character argument.
- Valid values are:
- 'i' = case-insensitive matching.
- 'c' = case sensitive matching.
- 'n' = the period character (match any character) can match the newline character.
- 'm' = source_string is treated as multiple lines instead of as a single line. With this option, the '^' and '$' characters apply to each line in source_string instead of the entire source_string.
- 'l' = if source_string exceeds the current maximum allowed source_string size (currently 16 MB), a NULL is returned instead of an error. This is useful for long-running queries where you do not want long strings causing an error that would make the query fail.
- 'x' = ignore whitespace.
- The argument can contain more than one character. If a character in the argument is not valid, then that character is ignored.
- If match_arg is not specified, is NULL, or is empty:
- The match is case-sensitive.
- A period does not match the newline character.
-
source_string is treated as a single line.
