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The following page has been changed by CorinneC: http://wiki.apache.org/pig/PigLatin ------------------------------------------------------------------------------ * The comparison operator compOp can be one of * '''==, <nop>!=, >, >=, <, or <=''' for '''numerical''' comparisons. '''Note that if these operators are used on non-numeric data, a runtime error will be thrown'''. * '''eq, neq, gt, gte, lt, or lte''' for string comparisons - * '''matches''' for regular expression matching, e.g., $0 matches "*apache*". The [http://java.sun.com/j2se/1.5.0/docs/api/java/util/regex/Pattern.html format] of regular expressions is that supported by Java. + * '''matches''' for regular expression matching, e.g., $0 matches '.*apache.*'. The [http://java.sun.com/j2se/1.5.0/docs/api/java/util/regex/Pattern.html format] of regular expressions is that supported by Java. Thus, a somewhat more complicated condition can be {{{
