Transpile simple choice-type regular expressions into lists of choices to use with string replace multi #7967
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -16,10 +16,18 @@ | |
| package com.nvidia.spark.rapids | ||
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| import org.apache.spark.sql.catalyst.expressions.{Expression, Literal, RegExpReplace} | ||
| import org.apache.spark.sql.rapids.{GpuRegExpReplace, GpuRegExpReplaceWithBackref, GpuRegExpUtils} | ||
| import org.apache.spark.sql.types.DataTypes | ||
| import org.apache.spark.unsafe.types.UTF8String | ||
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| trait GpuRegExpReplaceOpt extends Serializable | ||
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| @SerialVersionUID(100L) | ||
| object GpuRegExpStringReplace extends GpuRegExpReplaceOpt | ||
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| @SerialVersionUID(100L) | ||
| object GpuRegExpStringReplaceMulti extends GpuRegExpReplaceOpt | ||
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| class GpuRegExpReplaceMeta( | ||
| expr: RegExpReplace, | ||
| conf: RapidsConf, | ||
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@@ -30,37 +38,44 @@ class GpuRegExpReplaceMeta( | |
| private var javaPattern: Option[String] = None | ||
| private var cudfPattern: Option[String] = None | ||
| private var replacement: Option[String] = None | ||
| private var searchList: Option[Seq[String]] = None | ||
| private var replaceOpt: Option[GpuRegExpReplaceOpt] = None | ||
| private var containsBackref: Boolean = false | ||
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| override def tagExprForGpu(): Unit = { | ||
| replacement = expr.rep match { | ||
| case Literal(s: UTF8String, DataTypes.StringType) if s != null => Some(s.toString) | ||
| case _ => None | ||
| } | ||
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| expr.regexp match { | ||
| case Literal(s: UTF8String, DataTypes.StringType) if s != null => | ||
| javaPattern = Some(s.toString()) | ||
| try { | ||
| val (pat, repl) = | ||
| new CudfRegexTranspiler(RegexReplaceMode).getTranspiledAST(s.toString, None, | ||
| replacement) | ||
| repl.map { r => GpuRegExpUtils.backrefConversion(r.toRegexString) }.foreach { | ||
| case (hasBackref, convertedRep) => | ||
| containsBackref = hasBackref | ||
| replacement = Some(GpuRegExpUtils.unescapeReplaceString(convertedRep)) | ||
| } | ||
| if (!containsBackref && GpuOverrides.isSupportedStringReplacePattern(expr.regexp)) { | ||
| replaceOpt = Some(GpuRegExpStringReplace) | ||
| } else { | ||
| searchList = GpuRegExpUtils.getChoicesFromRegex(pat) | ||
| searchList match { | ||
| case Some(_) if !containsBackref => | ||
| replaceOpt = Some(GpuRegExpStringReplaceMulti) | ||
| case _ => | ||
| GpuRegExpUtils.tagForRegExpEnabled(this) | ||
| GpuRegExpUtils.validateRegExpComplexity(this, pat) | ||
| cudfPattern = Some(pat.toRegexString) | ||
| } | ||
| } | ||
| } catch { | ||
| case e: RegexUnsupportedException => | ||
| willNotWorkOnGpu(e.getMessage) | ||
| } | ||
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| case _ => | ||
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@@ -82,19 +97,27 @@ class GpuRegExpReplaceMeta( | |
| // ignore the pos expression which must be a literal 1 after tagging check | ||
| require(childExprs.length == 4, | ||
| s"Unexpected child count for RegExpReplace: ${childExprs.length}") | ||
| replaceOpt match { | ||
| case None => | ||
| (javaPattern, cudfPattern, replacement) match { | ||
| case (Some(javaPattern), Some(cudfPattern), Some(cudfReplacement)) => | ||
| if (containsBackref) { | ||
| GpuRegExpReplaceWithBackref(lhs, regexp, rep)(cudfPattern, cudfReplacement) | ||
| } else { | ||
| GpuRegExpReplace(lhs, regexp, rep)(javaPattern, cudfPattern, cudfReplacement, | ||
| None, None) | ||
| } | ||
| case _ => | ||
| throw new IllegalStateException("Expression has not been tagged correctly") | ||
| } | ||
| case _ => | ||
| (javaPattern, replacement) match { | ||
| case (Some(javaPattern), Some(replacement)) => | ||
| GpuRegExpReplace(lhs, regexp, rep)(javaPattern, javaPattern, replacement, | ||
| searchList, replaceOpt) | ||
| case _ => | ||
| throw new IllegalStateException("Expression has not been tagged correctly") | ||
| } | ||
| } | ||
| } | ||
| } | ||
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nit, here and other places, could use typed constants