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[SPARK-21261][DOCS]SQL Regex document fix #18477

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[SPARK-21261][DOCS]SQL Regex document fix #18477

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10 changes: 8 additions & 2 deletions ...catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -268,7 +268,10 @@ case class StringSplit(str: Expression, pattern: Expression)
usage = "_FUNC_(str, regexp, rep) - Replaces all substrings of `str` that match `regexp` with `rep`.",
extended = """
Examples:
> SELECT _FUNC_('100-200', '(\d+)', 'num');
spark-sql> SELECT _FUNC_('100-200', '(\\d+)', 'num');
num-num

scala> SELECT _FUNC_('100-200', '(\\\\d+)', 'num');
num-num
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@gatorsmile gatorsmile Oct 24, 2017

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scala> spark.sql("SELECT regexp_replace('100-200', '(\\d+)', 'num')").collect()
Array([num-num])

""")
// scalastyle:on line.size.limit
Expand Down Expand Up @@ -375,7 +378,10 @@ case class RegExpReplace(subject: Expression, regexp: Expression, rep: Expressio
usage = "_FUNC_(str, regexp[, idx]) - Extracts a group that matches `regexp`.",
extended = """
Examples:
> SELECT _FUNC_('100-200', '(\d+)-(\d+)', 1);
spark-sql> SELECT _FUNC_('100-200', '(\\d+)-(\\d+)', 1);
100

scala> SELECT _FUNC_('100-200', '(\\\\d+)-(\\\\d+)', 1);
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@gatorsmile gatorsmile Oct 24, 2017

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scala> spark.sql("SELECT regexp_extract('100-200', '(\\d+)-(\\d+)', 1)").collect()

100
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@gatorsmile gatorsmile Oct 24, 2017

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Array([100])

""")
case class RegExpExtract(subject: Expression, regexp: Expression, idx: Expression)
Expand Down