org.apache.calcite.runtime

Class Like

java.lang.Object

org.apache.calcite.runtime.Like

public class Like
extends Object

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

Field Summary

Fields

Modifier and Type	Field and Description
private static String	JAVA_REGEX_SPECIALS
private static String[]	REG_CHAR_CLASSES
private static String	SQL_SIMILAR_SPECIALS

Constructor Summary

Constructors

Modifier	Constructor and Description
private	Like()

Method Summary

Modifier and Type	Method and Description
private static RuntimeException	invalidEscapeCharacter(String s)
private static RuntimeException	invalidEscapeSequence(String s, int i)
private static RuntimeException	invalidRegularExpression(String pattern, int i)
private static void	similarEscapeRuleChecking(String sqlPattern, char escapeChar)
private static int	sqlSimilarRewriteCharEnumeration(String sqlPattern, StringBuilder javaPattern, int pos, char escapeChar)
(package private) static String	sqlToRegexLike(String sqlPattern, char escapeChar) Translates a SQL LIKE pattern to Java regex pattern.
(package private) static String	sqlToRegexLike(String sqlPattern, CharSequence escapeStr) Translates a SQL LIKE pattern to Java regex pattern, with optional escape string.
(package private) static String	sqlToRegexSimilar(String sqlPattern, char escapeChar) Translates SQL SIMILAR pattern to Java regex pattern.
(package private) 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

Field Detail

JAVA_REGEX_SPECIALS

private static final String JAVA_REGEX_SPECIALS

See Also:

Constant Field Values

SQL_SIMILAR_SPECIALS

private static final String SQL_SIMILAR_SPECIALS

See Also:

Constant Field Values

REG_CHAR_CLASSES

private static final String[] REG_CHAR_CLASSES

Constructor Detail

Like

private Like()

Method Detail

sqlToRegexLike

static String sqlToRegexLike(String sqlPattern,
                             CharSequence escapeStr)

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

sqlToRegexLike

static String sqlToRegexLike(String sqlPattern,
                             char escapeChar)

Translates a SQL LIKE pattern to Java regex pattern.

invalidEscapeCharacter

private static RuntimeException invalidEscapeCharacter(String s)

invalidEscapeSequence

private static RuntimeException invalidEscapeSequence(String s,
                                                      int i)

similarEscapeRuleChecking

private static void similarEscapeRuleChecking(String sqlPattern,
                                              char escapeChar)

invalidRegularExpression

private static RuntimeException invalidRegularExpression(String pattern,
                                                         int i)

sqlSimilarRewriteCharEnumeration

private static int sqlSimilarRewriteCharEnumeration(String sqlPattern,
                                                    StringBuilder javaPattern,
                                                    int pos,
                                                    char escapeChar)

sqlToRegexSimilar

static String sqlToRegexSimilar(String sqlPattern,
                                CharSequence escapeStr)

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

sqlToRegexSimilar

static String sqlToRegexSimilar(String sqlPattern,
                                char escapeChar)

Translates SQL SIMILAR pattern to Java regex pattern.