Package org.apache.shardingsphere.sql.parser.sql.common.util

Class SQLUtils

java.lang.Object

org.apache.shardingsphere.sql.parser.sql.common.util.SQLUtils

public final class SQLUtils
extends Object

SQL utility class.

Constructor Summary

Constructors

Constructor	Description
SQLUtils()

Method Summary

Modifier and Type	Method	Description
static String	convertLikePatternToRegex(String pattern)	Convert like pattern to regex.
static ExpressionSegment	createLiteralExpression(ASTNode astNode, int startIndex, int stopIndex, String text)	Create literal expression.
static String	getExactlyExpression(String value)	Get exactly SQL expression.
static Number	getExactlyNumber(String value, int radix)	Get exactly number value and type.
static String	getExactlyValue(String value)	Get exactly value for SQL expression.
static String	getExactlyValue(String value, String reservedCharacters)	Get exactly value for SQL expression.
static String	getExpressionWithoutOutsideParentheses(String value)	Get exactly SQL expression without outside parentheses.
static List<SubqueryTableSegment>	getSubqueryTableSegmentFromTableSegment(TableSegment tableSegment)	Get subquery from tableSegment.
static String	trimComment(String sql)	Trim the comment of SQL.
static String	trimSemicolon(String sql)	Trim the semicolon of SQL.
static String	tryGetRealContentInBackticks(String value)	Try get exactly value for backticks string.

Methods inherited from class java.lang.Object

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

Constructor Detail

SQLUtils

public SQLUtils()

Method Detail

getExactlyNumber

public static Number getExactlyNumber(String value,
                                      int radix)

Get exactly number value and type.

Parameters:

value - string to be converted

radix - radix

Returns:

exactly number value and type

getExactlyValue

public static String getExactlyValue(String value)

Get exactly value for SQL expression.

remove special char for SQL expression

Parameters:

value - SQL expression

Returns:

exactly SQL expression

getExactlyValue

public static String getExactlyValue(String value,
                                     String reservedCharacters)

Get exactly value for SQL expression.

remove special char for SQL expression

Parameters:

value - SQL expression

reservedCharacters - characters to be reserved

Returns:

exactly SQL expression

tryGetRealContentInBackticks

public static String tryGetRealContentInBackticks(String value)

Try get exactly value for backticks string.

try get content containing backticks exactly value

Parameters:

value - SQL expression

Returns:

exactly SQL expression

getExactlyExpression

public static String getExactlyExpression(String value)

Get exactly SQL expression.

remove space for SQL expression

Parameters:

value - SQL expression

Returns:

exactly SQL expression

getExpressionWithoutOutsideParentheses

public static String getExpressionWithoutOutsideParentheses(String value)

Get exactly SQL expression without outside parentheses.

Parameters:

value - SQL expression

Returns:

exactly SQL expression

getSubqueryTableSegmentFromTableSegment

public static List<SubqueryTableSegment> getSubqueryTableSegmentFromTableSegment(TableSegment tableSegment)

Get subquery from tableSegment.

Parameters:

tableSegment - TableSegment

Returns:

exactly SubqueryTableSegment list

createLiteralExpression

public static ExpressionSegment createLiteralExpression(ASTNode astNode,
                                                        int startIndex,
                                                        int stopIndex,
                                                        String text)

Create literal expression.

Parameters:

astNode - AST node

startIndex - start index

stopIndex - stop index

text - text

Returns:

literal expression segment

trimSemicolon

public static String trimSemicolon(String sql)

Trim the semicolon of SQL.

Parameters:

sql - SQL to be trim

Returns:

SQL without semicolon

trimComment

public static String trimComment(String sql)

Trim the comment of SQL.

Parameters:

sql - SQL to be trim

Returns:

remove comment from SQL

convertLikePatternToRegex

public static String convertLikePatternToRegex(String pattern)

Convert like pattern to regex.

Parameters:

pattern - like pattern

Returns:

regex