Implementation of REGEXP_SUBSTR(, , ) built-in function, where is the offset from the start of . Positive offset is treated as 1-based, a zero offset is treated as 0-based, and a negative offset starts from the end of the string working backwards. The is the pattern we would like to search for in the string. The function returns the first occurrence of any substring in the string that matches the input as a VARCHAR.
@author zhuang
@since 0.1
Implementation of REGEXP_SUBSTR(, , ) built-in function, where is the offset from the start of . Positive offset is treated as 1-based, a zero offset is treated as 0-based, and a negative offset starts from the end of the string working backwards. The is the pattern we would like to search for in the string. The function returns the first occurrence of any substring in the string that matches the input as a VARCHAR.
@since 0.1
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