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org.h2.expression.function.BuiltinFunctions Maven / Gradle / Ivy
/*
* Copyright 2004-2021 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (https://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.expression.function;
import java.util.HashSet;
import org.h2.engine.Database;
import org.h2.mode.ModeFunction;
/**
* Maintains the list of built-in functions.
*/
public final class BuiltinFunctions {
private static final HashSet FUNCTIONS;
static {
String[] names = { //
// MathFunction
"ABS", "MOD", "FLOOR", "CEIL", "ROUND", "ROUNDMAGIC", "SIGN", "TRUNC", "TRUNCATE",
// MathFunction1
"SIN", "COS", "TAN", "COT", "SINH", "COSH", "TANH", "ASIN", "ACOS", "ATAN", //
"LOG10", "LN", "EXP", "SQRT", "DEGREES", "RADIANS",
// MathFunction2
"ATAN2", "LOG", "POWER",
// BitFunction
"BITAND", "BITOR", "BITXOR", "BITNOT", "BITNAND", "BITNOR", "BITXNOR", "BITGET", "BITCOUNT", "LSHIFT",
"RSHIFT", "ULSHIFT", "URSHIFT", "ROTATELEFT", "ROTATERIGHT",
// DateTimeFunction
"EXTRACT", "DATE_TRUNC", "DATEADD", "DATEDIFF", //
"TIMESTAMPADD", "TIMESTAMPDIFF",
// DateTimeFormatFunction
"FORMATDATETIME", "PARSEDATETIME",
// DayMonthNameFunction
"DAYNAME", "MONTHNAME",
// CardinalityExpression
"CARDINALITY", "ARRAY_MAX_CARDINALITY",
// StringFunction
"LOCATE", "INSERT", "REPLACE", "LPAD", "RPAD", "TRANSLATE",
// StringFunction1
"UPPER", "LOWER", "ASCII", "CHAR", "CHR", "STRINGENCODE", "STRINGDECODE", "STRINGTOUTF8",
"UTF8TOSTRING", "HEXTORAW", "RAWTOHEX", "SPACE", "QUOTE_IDENT",
// StringFunction2
/* LEFT and RIGHT are keywords */ "REPEAT",
// SubstringFunction
"SUBSTRING",
// ToCharFunction
"TO_CHAR",
// LengthFunction
"CHAR_LENGTH", "CHARACTER_LENGTH", "LENGTH", "OCTET_LENGTH", "BIT_LENGTH",
// TrimFunction
"TRIM",
// RegexpFunction
"REGEXP_LIKE", "REGEXP_REPLACE", "REGEXP_SUBSTR",
// XMLFunction
"XMLATTR", "XMLCDATA", "XMLCOMMENT", "XMLNODE", "XMLSTARTDOC", "XMLTEXT",
// ArrayFunction
"TRIM_ARRAY", "ARRAY_CONTAINS", "ARRAY_SLICE",
// CompressFunction
"COMPRESS", "EXPAND",
// SoundexFunction
"SOUNDEX", "DIFFERENCE",
// JsonConstructorFunction
"JSON_OBJECT", "JSON_ARRAY",
// CryptFunction
"ENCRYPT", "DECRYPT",
// CoalesceFunction
"COALESCE", "GREATEST", "LEAST",
// NullIfFunction
"NULLIF",
// ConcatFunction
"CONCAT", "CONCAT_WS",
// HashFunction
"HASH", "ORA_HASH",
// RandFunction
"RAND", "RANDOM", "SECURE_RAND", "RANDOM_UUID", "UUID",
// SessionControlFunction
"ABORT_SESSION", "CANCEL_SESSION",
// SysInfoFunction
"AUTOCOMMIT", "DATABASE_PATH", "H2VERSION", "LOCK_MODE", "LOCK_TIMEOUT", "MEMORY_FREE", "MEMORY_USED",
"READONLY", "SESSION_ID", "TRANSACTION_ID",
// TableInfoFunction
"DISK_SPACE_USED", "ESTIMATED_ENVELOPE",
// FileFunction
"FILE_READ", "FILE_WRITE",
// DataTypeSQLFunction
"DATA_TYPE_SQL",
// DBObjectFunction
"DB_OBJECT_ID", "DB_OBJECT_SQL",
// CSVWriteFunction
"CSVWRITE",
// SetFunction
/* SET is keyword */
// SignalFunction
"SIGNAL",
// TruncateValueFunction
"TRUNCATE_VALUE",
// CompatibilitySequenceValueFunction
"CURRVAL", "NEXTVAL",
// Constants
"ZERO", "PI",
// ArrayTableFunction
"UNNEST", /* TABLE is a keyword */ "TABLE_DISTINCT",
// CSVReadFunction
"CSVREAD",
// LinkSchemaFunction
"LINK_SCHEMA",
//
};
HashSet set = new HashSet<>(128);
for (String n : names) {
set.add(n);
}
FUNCTIONS = set;
}
/**
* Returns whether specified function is a non-keyword built-in function.
*
* @param database
* the database
* @param upperName
* the name of the function in upper case
* @return {@code true} if it is
*/
public static boolean isBuiltinFunction(Database database, String upperName) {
return FUNCTIONS.contains(upperName) || ModeFunction.getFunction(database, upperName) != null;
}
private BuiltinFunctions() {
}
}
