strcontains performs a substring search, returning 1 or 0.
1 if found, 0 if not found.
SQL> select strcontains('AbracadabrA','abrA');
strcontains
INTEGER
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1
1 Rows. -- 0 msec.
SQL> select strcontains('AbracadabrA','XZ');
strcontains
INTEGER
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0
1 Rows. -- 0 msec.
