org.apache.drill.exec.expr.fn.impl

Class RegexpUtil

java.lang.Object

org.apache.drill.exec.expr.fn.impl.RegexpUtil

public class RegexpUtil
extends Object

Utilities for converting SQL LIKE and SIMILAR operators to regular expressions.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	RegexpUtil.SqlPatternInfo
static class	RegexpUtil.SqlPatternType

Constructor Summary

Constructors

Constructor and Description
RegexpUtil()

Method Summary

Modifier and Type	Method and Description
static RegexpUtil.SqlPatternInfo	sqlToRegexLike(String sqlPattern) Translates a SQL LIKE pattern to Java regex pattern.
static RegexpUtil.SqlPatternInfo	sqlToRegexLike(String sqlPattern, char escapeChar) Translates a SQL LIKE pattern to Java regex pattern.
static RegexpUtil.SqlPatternInfo	sqlToRegexLike(String sqlPattern, CharSequence escapeStr) Translates a SQL LIKE pattern to Java regex pattern, with optional escape string.
static String	sqlToRegexSimilar(String sqlPattern) Translates a SQL SIMILAR pattern to Java regex pattern.
static String	sqlToRegexSimilar(String sqlPattern, char escapeChar) Translates SQL SIMILAR pattern to Java regex pattern.
static String	sqlToRegexSimilar(String sqlPattern, CharSequence escapeStr) Translates a SQL SIMILAR pattern to Java regex pattern, with optional escape string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RegexpUtil

public RegexpUtil()

Method Detail

sqlToRegexLike

public static RegexpUtil.SqlPatternInfo sqlToRegexLike(String sqlPattern)

Translates a SQL LIKE pattern to Java regex pattern. No escape char.

sqlToRegexLike

public static RegexpUtil.SqlPatternInfo sqlToRegexLike(String sqlPattern,
                                                       CharSequence escapeStr)

Translates a SQL LIKE pattern to Java regex pattern, with optional escape string.

sqlToRegexLike

public static RegexpUtil.SqlPatternInfo sqlToRegexLike(String sqlPattern,
                                                       char escapeChar)

Translates a SQL LIKE pattern to Java regex pattern.

sqlToRegexSimilar

public static String sqlToRegexSimilar(String sqlPattern)

Translates a SQL SIMILAR pattern to Java regex pattern. No escape char.

sqlToRegexSimilar

public static String sqlToRegexSimilar(String sqlPattern,
                                       CharSequence escapeStr)

Translates a SQL SIMILAR pattern to Java regex pattern, with optional escape string.

sqlToRegexSimilar

public static String sqlToRegexSimilar(String sqlPattern,
                                       char escapeChar)

Translates SQL SIMILAR pattern to Java regex pattern.