-
FunctionSQL
-
FUNC_POSITION_CHAR: int
-
FUNC_POSITION_BINARY: int
-
FUNC_OCCURENCES_REGEX: int
-
FUNC_POSITION_REGEX: int
-
FUNC_EXTRACT: int
-
FUNC_BIT_LENGTH: int
-
FUNC_CHAR_LENGTH: int
-
FUNC_OCTET_LENGTH: int
-
FUNC_CARDINALITY: int
-
FUNC_MAX_CARDINALITY: int
-
FUNC_TRIM_ARRAY: int
-
FUNC_ABS: int
-
FUNC_MOD: int
-
FUNC_LN: int
-
FUNC_EXP: int
-
FUNC_POWER: int
-
FUNC_SQRT: int
-
FUNC_FLOOR: int
-
FUNC_CEILING: int
-
FUNC_WIDTH_BUCKET: int
-
FUNC_SUBSTRING_CHAR: int
-
FUNC_SUBSTRING_REG_EXPR: int
-
FUNC_SUBSTRING_REGEX: int
-
FUNC_FOLD_LOWER: int
-
FUNC_FOLD_UPPER: int
-
FUNC_TRANSCODING: int
-
FUNC_TRANSLITERATION: int
-
FUNC_REGEX_TRANSLITERATION: int
-
FUNC_TRIM_CHAR: int
-
FUNC_OVERLAY_CHAR: int
-
FUNC_CHAR_NORMALIZE: int
-
FUNC_SUBSTRING_BINARY: int
-
FUNC_TRIM_BINARY: int
-
FUNC_OVERLAY_BINARY: int
-
FUNC_CURRENT_DATE: int
-
FUNC_CURRENT_TIME: int
-
FUNC_CURRENT_TIMESTAMP: int
-
FUNC_LOCALTIME: int
-
FUNC_LOCALTIMESTAMP: int
-
FUNC_CURRENT_CATALOG: int
-
FUNC_CURRENT_DEFAULT_TRANSFORM_GROUP: int
-
FUNC_CURRENT_PATH: int
-
FUNC_CURRENT_ROLE: int
-
FUNC_CURRENT_SCHEMA: int
-
FUNC_CURRENT_TRANSFORM_GROUP_FOR_TYPE: int
-
FUNC_CURRENT_USER: int
-
FUNC_SESSION_USER: int
-
FUNC_SYSTEM_USER: int
-
FUNC_USER: int
-
FUNC_VALUE: int
-
noParamList: short[]
-
emptyParamList: short[]
-
optionalNoParamList: short[]
-
optionalSingleParamList: short[]
-
singleParamList: short[]
-
optionalIntegerParamList: short[]
-
optionalDoubleParamList: short[]
-
doubleParamList: short[]
-
tripleParamList: short[]
-
quadParamList: short[]
-
valueFuncMap: IntValueHashMap
-
regularFuncMap: IntValueHashMap
-
nonDeterministicFuncSet: OrderedIntHashSet
-
static class initializer
-
static class initializer
-
funcType: int
-
isDeterministic: boolean
-
name: String
-
parseList: short[]
-
parseListAlt: short[]
-
isSQLValueFunction: boolean
-
newSQLFunction(String, CompileContext): FunctionSQL
-
FunctionSQL(): void
-
FunctionSQL(int): void
-
setArguments(Expression[]): void
-
getFunctionExpression(): Expression
-
getValue(Session): Object
-
getValue(Session, Object[]): Object
-
resolveTypes(Session, Expression): void
-
getExtractValue(Session, Object[]): Object
-
getSQL(): String
-
equals(Expression): boolean
-
hashCode(): int
-
describe(Session, int): String
-
isDeterministic(): boolean
-
isValueFunction(): boolean
-
http://hsqldb.org: HSQLDB - Lightweight 100% Java SQL Database Engine
(The HSQL Development Group)
- Blaine Simpson
/* Copyright (c) 2001-2019, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the HSQL Development Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.hsqldb;
import org.hsqldb.ParserDQL.CompileContext;
import org.hsqldb.error.Error;
import org.hsqldb.error.ErrorCode;
import org.hsqldb.lib.IntValueHashMap;
import org.hsqldb.lib.OrderedIntHashSet;
import org.hsqldb.map.ValuePool;
import org.hsqldb.types.BinaryData;
import org.hsqldb.types.BinaryType;
import org.hsqldb.types.BlobData;
import org.hsqldb.types.CharacterType;
import org.hsqldb.types.DTIType;
import org.hsqldb.types.DateTimeType;
import org.hsqldb.types.IntervalType;
import org.hsqldb.types.NumberType;
import org.hsqldb.types.Type;
import org.hsqldb.types.Types;
Implementation of SQL standard function calls
Author: Fred Toussi (fredt@users dot sourceforge.net) Version: 2.5.0 Since: 1.9.0
/**
* Implementation of SQL standard function calls
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.5.0
* @since 1.9.0
*/
public class FunctionSQL extends Expression {
protected static final int FUNC_POSITION_CHAR = 1; // numeric
private static final int FUNC_POSITION_BINARY = 2;
private static final int FUNC_OCCURENCES_REGEX = 3;
private static final int FUNC_POSITION_REGEX = 4;
protected static final int FUNC_EXTRACT = 5;
protected static final int FUNC_BIT_LENGTH = 6;
protected static final int FUNC_CHAR_LENGTH = 7;
protected static final int FUNC_OCTET_LENGTH = 8;
private static final int FUNC_CARDINALITY = 9;
private static final int FUNC_MAX_CARDINALITY = 10;
private static final int FUNC_TRIM_ARRAY = 11;
private static final int FUNC_ABS = 12;
private static final int FUNC_MOD = 13;
protected static final int FUNC_LN = 14;
private static final int FUNC_EXP = 15;
private static final int FUNC_POWER = 16;
private static final int FUNC_SQRT = 17;
private static final int FUNC_FLOOR = 20;
private static final int FUNC_CEILING = 21;
private static final int FUNC_WIDTH_BUCKET = 22;
protected static final int FUNC_SUBSTRING_CHAR = 23; // string
private static final int FUNC_SUBSTRING_REG_EXPR = 24;
private static final int FUNC_SUBSTRING_REGEX = 25;
protected static final int FUNC_FOLD_LOWER = 26;
protected static final int FUNC_FOLD_UPPER = 27;
private static final int FUNC_TRANSCODING = 28;
private static final int FUNC_TRANSLITERATION = 29;
private static final int FUNC_REGEX_TRANSLITERATION = 30;
protected static final int FUNC_TRIM_CHAR = 31;
static final int FUNC_OVERLAY_CHAR = 32;
private static final int FUNC_CHAR_NORMALIZE = 33;
private static final int FUNC_SUBSTRING_BINARY = 40;
private static final int FUNC_TRIM_BINARY = 41;
private static final int FUNC_OVERLAY_BINARY = 42;
protected static final int FUNC_CURRENT_DATE = 43; // datetime
protected static final int FUNC_CURRENT_TIME = 44;
protected static final int FUNC_CURRENT_TIMESTAMP = 50;
protected static final int FUNC_LOCALTIME = 51;
protected static final int FUNC_LOCALTIMESTAMP = 52;
private static final int FUNC_CURRENT_CATALOG = 53; // general
private static final int FUNC_CURRENT_DEFAULT_TRANSFORM_GROUP = 54;
private static final int FUNC_CURRENT_PATH = 55;
private static final int FUNC_CURRENT_ROLE = 56;
private static final int FUNC_CURRENT_SCHEMA = 57;
private static final int FUNC_CURRENT_TRANSFORM_GROUP_FOR_TYPE = 58;
private static final int FUNC_CURRENT_USER = 59;
private static final int FUNC_SESSION_USER = 60;
private static final int FUNC_SYSTEM_USER = 61;
protected static final int FUNC_USER = 62;
private static final int FUNC_VALUE = 63;
//
static final short[] noParamList = new short[]{};
static final short[] emptyParamList = new short[] {
Tokens.OPENBRACKET, Tokens.CLOSEBRACKET
};
static final short[] optionalNoParamList = new short[] {
Tokens.X_OPTION, 2, Tokens.OPENBRACKET, Tokens.CLOSEBRACKET
};
static final short[] optionalSingleParamList = new short[] {
Tokens.OPENBRACKET, Tokens.X_OPTION, 1, Tokens.QUESTION,
Tokens.CLOSEBRACKET
};
static final short[] singleParamList = new short[] {
Tokens.OPENBRACKET, Tokens.QUESTION, Tokens.CLOSEBRACKET
};
static final short[] optionalIntegerParamList = new short[] {
Tokens.X_OPTION, 3, Tokens.OPENBRACKET, Tokens.X_POS_INTEGER,
Tokens.CLOSEBRACKET
};
static final short[] optionalDoubleParamList = new short[] {
Tokens.OPENBRACKET, Tokens.QUESTION, Tokens.X_OPTION, 2, Tokens.COMMA,
Tokens.QUESTION, Tokens.CLOSEBRACKET
};
static final short[] doubleParamList = new short[] {
Tokens.OPENBRACKET, Tokens.QUESTION, Tokens.COMMA, Tokens.QUESTION,
Tokens.CLOSEBRACKET
};
static final short[] tripleParamList = new short[] {
Tokens.OPENBRACKET, Tokens.QUESTION, Tokens.COMMA, Tokens.QUESTION,
Tokens.COMMA, Tokens.QUESTION, Tokens.CLOSEBRACKET
};
static final short[] quadParamList = new short[] {
Tokens.OPENBRACKET, Tokens.QUESTION, Tokens.COMMA, Tokens.QUESTION,
Tokens.COMMA, Tokens.QUESTION, Tokens.COMMA, Tokens.QUESTION,
Tokens.CLOSEBRACKET
};
//
static IntValueHashMap valueFuncMap = new IntValueHashMap();
static IntValueHashMap regularFuncMap = new IntValueHashMap();
static OrderedIntHashSet nonDeterministicFuncSet = new OrderedIntHashSet();
static {
regularFuncMap.put(Tokens.T_POSITION, FUNC_POSITION_CHAR);
/*
regularFuncMap.put(Token.T_OCCURENCES_REGEX, FUNC_OCCURENCES_REGEX);
*/
regularFuncMap.put(Tokens.T_POSITION_REGEX, FUNC_POSITION_REGEX);
regularFuncMap.put(Tokens.T_EXTRACT, FUNC_EXTRACT);
regularFuncMap.put(Tokens.T_BIT_LENGTH, FUNC_BIT_LENGTH);
regularFuncMap.put(Tokens.T_CHAR_LENGTH, FUNC_CHAR_LENGTH);
regularFuncMap.put(Tokens.T_CHARACTER_LENGTH, FUNC_CHAR_LENGTH);
regularFuncMap.put(Tokens.T_OCTET_LENGTH, FUNC_OCTET_LENGTH);
regularFuncMap.put(Tokens.T_CARDINALITY, FUNC_CARDINALITY);
regularFuncMap.put(Tokens.T_ARRAY_MAX_CARDINALITY,
FUNC_MAX_CARDINALITY);
regularFuncMap.put(Tokens.T_MAX_CARDINALITY, FUNC_MAX_CARDINALITY);
regularFuncMap.put(Tokens.T_TRIM_ARRAY, FUNC_TRIM_ARRAY);
regularFuncMap.put(Tokens.T_ABS, FUNC_ABS);
regularFuncMap.put(Tokens.T_MOD, FUNC_MOD);
regularFuncMap.put(Tokens.T_LN, FUNC_LN);
regularFuncMap.put(Tokens.T_EXP, FUNC_EXP);
regularFuncMap.put(Tokens.T_POWER, FUNC_POWER);
regularFuncMap.put(Tokens.T_SQRT, FUNC_SQRT);
regularFuncMap.put(Tokens.T_FLOOR, FUNC_FLOOR);
regularFuncMap.put(Tokens.T_CEILING, FUNC_CEILING);
regularFuncMap.put(Tokens.T_CEIL, FUNC_CEILING);
regularFuncMap.put(Tokens.T_WIDTH_BUCKET, FUNC_WIDTH_BUCKET);
regularFuncMap.put(Tokens.T_SUBSTRING, FUNC_SUBSTRING_CHAR);
/*
regularFuncMap.put(Token.T_SUBSTRING_REG_EXPR,
FUNC_SUBSTRING_REG_EXPR);
*/
regularFuncMap.put(Tokens.T_SUBSTRING_REGEX, FUNC_SUBSTRING_REGEX);
regularFuncMap.put(Tokens.T_LOWER, FUNC_FOLD_LOWER);
regularFuncMap.put(Tokens.T_UPPER, FUNC_FOLD_UPPER);
/*
regularFuncMap.put(Token.T_TRANSCODING, FUNC_TRANSCODING);
regularFuncMap.put(Token.T_TRANSLITERATION, FUNC_TRANSLITERATION);
regularFuncMap.put(Token.T_TRASLATION,
FUNC_REGEX_TRANSLITERATION);
*/
regularFuncMap.put(Tokens.T_TRIM, FUNC_TRIM_CHAR);
regularFuncMap.put(Tokens.T_OVERLAY, FUNC_OVERLAY_CHAR);
/*
regularFuncMap.put(Token.T_NORMALIZE, FUNC_CHAR_NORMALIZE);
*/
regularFuncMap.put(Tokens.T_TRIM, FUNC_TRIM_BINARY);
}
static {
valueFuncMap.put(Tokens.T_CURRENT_DATE, FUNC_CURRENT_DATE);
valueFuncMap.put(Tokens.T_CURRENT_TIME, FUNC_CURRENT_TIME);
valueFuncMap.put(Tokens.T_CURRENT_TIMESTAMP, FUNC_CURRENT_TIMESTAMP);
valueFuncMap.put(Tokens.T_LOCALTIME, FUNC_LOCALTIME);
valueFuncMap.put(Tokens.T_LOCALTIMESTAMP, FUNC_LOCALTIMESTAMP);
valueFuncMap.put(Tokens.T_CURRENT_CATALOG, FUNC_CURRENT_CATALOG);
/*
valueFuncMap.put(Token.T_CURRENT_DEFAULT_TRANSFORM_GROUP,
FUNC_CURRENT_DEFAULT_TRANSFORM_GROUP);
*/
valueFuncMap.put(Tokens.T_CURRENT_PATH, FUNC_CURRENT_PATH);
valueFuncMap.put(Tokens.T_CURRENT_ROLE, FUNC_CURRENT_ROLE);
valueFuncMap.put(Tokens.T_CURRENT_SCHEMA, FUNC_CURRENT_SCHEMA);
/*
valueFuncMap.put(Token.T_CURRENT_TRANSFORM_GROUP_FOR_TYPE,
FUNC_CURRENT_TRANSFORM_GROUP_FOR_TYPE);
*/
valueFuncMap.put(Tokens.T_CURRENT_USER, FUNC_CURRENT_USER);
valueFuncMap.put(Tokens.T_SESSION_USER, FUNC_SESSION_USER);
valueFuncMap.put(Tokens.T_SYSTEM_USER, FUNC_SYSTEM_USER);
valueFuncMap.put(Tokens.T_USER, FUNC_USER);
valueFuncMap.put(Tokens.T_VALUE, FUNC_VALUE);
//
nonDeterministicFuncSet.addAll(valueFuncMap.values());
}
//
int funcType;
boolean isDeterministic;
String name;
short[] parseList;
short[] parseListAlt;
boolean isSQLValueFunction;
public static FunctionSQL newSQLFunction(String token,
CompileContext context) {
int id = regularFuncMap.get(token, -1);
boolean isValueFunction = false;
if (id == -1) {
id = valueFuncMap.get(token, -1);
isValueFunction = true;
}
if (id == -1) {
return null;
}
FunctionSQL function = new FunctionSQL(id);
if (id == FUNC_VALUE) {
if (context.currentDomain == null) {
return null;
}
function.dataType = context.currentDomain;
} else {
function.isSQLValueFunction = isValueFunction;
}
return function;
}
protected FunctionSQL() {
super(OpTypes.SQL_FUNCTION);
}
protected FunctionSQL(int id) {
this();
this.funcType = id;
isDeterministic = !nonDeterministicFuncSet.contains(id);
switch (id) {
case FUNC_POSITION_CHAR :
case FUNC_POSITION_BINARY :
name = Tokens.T_POSITION;
parseList = new short[] {
Tokens.OPENBRACKET, Tokens.QUESTION, Tokens.IN,
Tokens.QUESTION, Tokens.X_OPTION, 5, Tokens.USING,
Tokens.X_KEYSET, 2, Tokens.CHARACTERS, Tokens.OCTETS,
Tokens.CLOSEBRACKET
};
break;
case FUNC_OCCURENCES_REGEX :
case FUNC_POSITION_REGEX :
break;
case FUNC_EXTRACT :
name = Tokens.T_EXTRACT;
parseList = new short[] {
Tokens.OPENBRACKET, Tokens.X_KEYSET, 20, Tokens.YEAR,
Tokens.MONTH, Tokens.DAY, Tokens.HOUR, Tokens.MINUTE,
Tokens.SECOND, Tokens.DAY_OF_WEEK, Tokens.WEEK_OF_YEAR,
Tokens.QUARTER, Tokens.DAY_OF_YEAR, Tokens.DAY_OF_MONTH,
Tokens.WEEK_OF_YEAR, Tokens.DAY_NAME, Tokens.MONTH_NAME,
Tokens.SECONDS_MIDNIGHT, Tokens.TIMEZONE_HOUR,
Tokens.TIMEZONE_MINUTE, Tokens.MILLISECOND,
Tokens.MICROSECOND, Tokens.NANOSECOND, Tokens.FROM,
Tokens.QUESTION, Tokens.CLOSEBRACKET
};
break;
case FUNC_CHAR_LENGTH :
name = Tokens.T_CHAR_LENGTH;
parseList = new short[] {
Tokens.OPENBRACKET, Tokens.QUESTION, Tokens.X_OPTION, 5,
Tokens.USING, Tokens.X_KEYSET, 2, Tokens.CHARACTERS,
Tokens.OCTETS, Tokens.CLOSEBRACKET
};
break;
case FUNC_BIT_LENGTH :
name = Tokens.T_BIT_LENGTH;
parseList = singleParamList;
break;
case FUNC_OCTET_LENGTH :
name = Tokens.T_OCTET_LENGTH;
parseList = singleParamList;
break;
case FUNC_CARDINALITY :
name = Tokens.T_CARDINALITY;
parseList = singleParamList;
break;
case FUNC_MAX_CARDINALITY :
name = Tokens.T_MAX_CARDINALITY;
parseList = singleParamList;
break;
case FUNC_TRIM_ARRAY :
name = Tokens.T_TRIM_ARRAY;
parseList = doubleParamList;
break;
case FUNC_ABS :
name = Tokens.T_ABS;
parseList = singleParamList;
break;
case FUNC_MOD :
name = Tokens.T_MOD;
parseList = doubleParamList;
break;
case FUNC_LN :
name = Tokens.T_LN;
parseList = singleParamList;
break;
case FUNC_EXP :
name = Tokens.T_EXP;
parseList = singleParamList;
break;
case FUNC_POWER :
name = Tokens.T_POWER;
parseList = doubleParamList;
break;
case FUNC_SQRT :
name = Tokens.T_SQRT;
parseList = singleParamList;
break;
case FUNC_FLOOR :
name = Tokens.T_FLOOR;
parseList = singleParamList;
break;
case FUNC_CEILING :
name = Tokens.T_CEILING;
parseList = singleParamList;
break;
case FUNC_WIDTH_BUCKET :
name = Tokens.T_WIDTH_BUCKET;
parseList = quadParamList;
break;
case FUNC_SUBSTRING_CHAR :
case FUNC_SUBSTRING_BINARY :
name = Tokens.T_SUBSTRING;
parseList = new short[] {
Tokens.OPENBRACKET, Tokens.QUESTION, Tokens.FROM,
Tokens.QUESTION, Tokens.X_OPTION, 2, Tokens.FOR,
Tokens.QUESTION, Tokens.X_OPTION, 5, Tokens.USING,
Tokens.X_KEYSET, 2, Tokens.CHARACTERS, Tokens.OCTETS,
Tokens.CLOSEBRACKET
};
parseListAlt = new short[] {
Tokens.OPENBRACKET, Tokens.QUESTION, Tokens.COMMA,
Tokens.QUESTION, Tokens.X_OPTION, 2, Tokens.COMMA,
Tokens.QUESTION, Tokens.CLOSEBRACKET
};
break;
/*
case FUNCTION_SUBSTRING_REG_EXPR :
break;
case FUNCTION_SUBSTRING_REGEX :
break;
*/
case FUNC_FOLD_LOWER :
name = Tokens.T_LOWER;
parseList = singleParamList;
break;
case FUNC_FOLD_UPPER :
name = Tokens.T_UPPER;
parseList = singleParamList;
break;
/*
case FUNCTION_TRANSCODING :
break;
case FUNCTION_TRANSLITERATION :
break;
case FUNCTION_REGEX_TRANSLITERATION :
break;
*/
case FUNC_TRIM_CHAR :
case FUNC_TRIM_BINARY :
name = Tokens.T_TRIM;
parseList = new short[] {
Tokens.OPENBRACKET, Tokens.X_OPTION, 11, //
Tokens.X_OPTION, 5, //
Tokens.X_KEYSET, 3, Tokens.LEADING, Tokens.TRAILING,
Tokens.BOTH, //
Tokens.X_OPTION, 1, Tokens.QUESTION, //
Tokens.FROM, Tokens.QUESTION, Tokens.CLOSEBRACKET
};
break;
/*
case FUNCTION_CHAR_NORMALIZE :
break;
*/
case FUNC_OVERLAY_CHAR :
case FUNC_OVERLAY_BINARY :
name = Tokens.T_OVERLAY;
parseList = new short[] {
Tokens.OPENBRACKET, Tokens.QUESTION, Tokens.PLACING,
Tokens.QUESTION, Tokens.FROM, Tokens.QUESTION,
Tokens.X_OPTION, 2, Tokens.FOR, Tokens.QUESTION,
Tokens.X_OPTION, 2, Tokens.USING, Tokens.CHARACTERS,
Tokens.CLOSEBRACKET
};
break;
case FUNC_CURRENT_CATALOG :
name = Tokens.T_CURRENT_CATALOG;
parseList = noParamList;
break;
/*
case FUNC_CURRENT_DEFAULT_TRANSFORM_GROUP :
break;
case FUNC_CURRENT_PATH :
break;
*/
case FUNC_CURRENT_ROLE :
name = Tokens.T_CURRENT_ROLE;
parseList = noParamList;
break;
case FUNC_CURRENT_SCHEMA :
name = Tokens.T_CURRENT_SCHEMA;
parseList = noParamList;
break;
/*
case FUNC_CURRENT_TRANSFORM_GROUP_FOR_TYPE :
break;
*/
case FUNC_CURRENT_USER :
name = Tokens.T_CURRENT_USER;
parseList = noParamList;
break;
case FUNC_SESSION_USER :
name = Tokens.T_SESSION_USER;
parseList = noParamList;
break;
case FUNC_SYSTEM_USER :
name = Tokens.T_SYSTEM_USER;
parseList = noParamList;
break;
case FUNC_USER :
name = Tokens.T_USER;
parseList = optionalNoParamList;
break;
case FUNC_VALUE :
name = Tokens.T_VALUE;
parseList = noParamList;
break;
case FUNC_CURRENT_DATE :
name = Tokens.T_CURRENT_DATE;
parseList = noParamList;
break;
case FUNC_CURRENT_TIME :
name = Tokens.T_CURRENT_TIME;
parseList = optionalIntegerParamList;
break;
case FUNC_CURRENT_TIMESTAMP :
name = Tokens.T_CURRENT_TIMESTAMP;
parseList = optionalIntegerParamList;
break;
case FUNC_LOCALTIME :
name = Tokens.T_LOCALTIME;
parseList = optionalIntegerParamList;
break;
case FUNC_LOCALTIMESTAMP :
name = Tokens.T_LOCALTIMESTAMP;
parseList = optionalIntegerParamList;
break;
default :
throw Error.runtimeError(ErrorCode.U_S0500, "FunctionSQL");
}
}
public void setArguments(Expression[] newNodes) {
this.nodes = newNodes;
}
public Expression getFunctionExpression() {
return this;
}
Evaluates and returns this Function in the context of the session.
/**
* Evaluates and returns this Function in the context of the session.<p>
*/
public Object getValue(Session session) {
Object[] data = ValuePool.emptyObjectArray;
if (nodes.length > 0) {
data = new Object[nodes.length];
for (int i = 0; i < nodes.length; i++) {
Expression e = nodes[i];
if (e != null) {
data[i] = e.getValue(session, e.dataType);
}
}
}
return getValue(session, data);
}
Object getValue(Session session, Object[] data) {
switch (funcType) {
case FUNC_POSITION_CHAR : {
if (data[0] == null || data[1] == null) {
return null;
}
long offset = 0;
if (nodes.length > 3 && nodes[3] != null) {
Object value = nodes[3].getValue(session);
offset = ((Number) value).longValue() - 1;
if (offset < 0) {
offset = 0;
}
}
long result =
((CharacterType) nodes[1].dataType).position(
session, data[1], data[0], nodes[0].dataType,
offset) + 1;
if (nodes[2] != null
&& ((Number) nodes[2].valueData).intValue()
== Tokens.OCTETS) {
result *= 2;
}
return ValuePool.getLong(result);
}
case FUNC_POSITION_BINARY : {
if (data[0] == null || data[1] == null) {
return null;
}
long result =
((BinaryType) nodes[1].dataType).position(
session, (BlobData) data[1], (BlobData) data[0],
nodes[0].dataType, 0) + 1;
if (nodes[2] != null
&& ((Number) nodes[2].valueData).intValue()
== Tokens.OCTETS) {
result *= 2;
}
return ValuePool.getLong(result);
}
/*
case FUNC_OCCURENCES_REGEX :
case FUNC_POSITION_REGEX :
*/
case FUNC_EXTRACT : {
return getExtractValue(session, data);
}
case FUNC_CHAR_LENGTH : {
if (data[0] == null) {
return null;
}
long result = ((CharacterType) nodes[0].dataType).size(session,
data[0]);
return ValuePool.getLong(result);
}
case FUNC_BIT_LENGTH : {
if (data[0] == null) {
return null;
}
long result;
if (nodes[0].dataType.isBinaryType()) {
result = ((BlobData) data[0]).bitLength(session);
} else {
result =
16 * ((CharacterType) nodes[0].dataType).size(session,
data[0]);
}
return ValuePool.getLong(result);
}
case FUNC_OCTET_LENGTH : {
if (data[0] == null) {
return null;
}
long result;
if (nodes[0].dataType.isBinaryType()) {
result = ((BlobData) data[0]).length(session);
} else {
result =
2 * ((CharacterType) nodes[0].dataType).size(session,
data[0]);
}
return ValuePool.getLong(result);
}
case FUNC_CARDINALITY : {
if (data[0] == null) {
return null;
}
int result = nodes[0].dataType.cardinality(session, data[0]);
return ValuePool.getInt(result);
}
case FUNC_MAX_CARDINALITY : {
if (data[0] == null) {
return null;
}
int result = nodes[0].dataType.arrayLimitCardinality();
return ValuePool.getInt(result);
}
case FUNC_TRIM_ARRAY : {
if (data[0] == null) {
return null;
}
if (data[1] == null) {
return null;
}
Object[] array = (Object[]) data[0];
int length = ((Number) data[1]).intValue();
if (length < 0 || length > array.length) {
throw Error.error(ErrorCode.X_2202E);
}
Object[] newArray = new Object[array.length - length];
System.arraycopy(array, 0, newArray, 0, newArray.length);
return newArray;
}
case FUNC_ABS : {
if (data[0] == null) {
return null;
}
return dataType.absolute(data[0]);
}
case FUNC_MOD : {
if (data[0] == null || data[1] == null) {
return null;
}
data[0] = nodeDataTypes[0].convertToType(session, data[0],
nodes[0].dataType);
data[1] = nodeDataTypes[1].convertToType(session, data[1],
nodes[1].dataType);
// result type is the same as nodes[1]
Object value = ((NumberType) nodeDataTypes[0]).modulo(session,
data[0], data[1], nodeDataTypes[1]);
return value;
}
case FUNC_LN : {
if (data[0] == null) {
return null;
}
double d = ((Number) data[0]).doubleValue();
if (d <= 0) {
if (session.database.sqlDoubleNaN) {
throw Error.error(ErrorCode.X_2201E);
}
}
d = Math.log(d);
return ValuePool.getDouble(Double.doubleToLongBits(d));
}
case FUNC_EXP : {
if (data[0] == null) {
return null;
}
double val = Math.exp(((Number) data[0]).doubleValue());
return ValuePool.getDouble(Double.doubleToLongBits(val));
}
case FUNC_POWER : {
if (data[0] == null || data[1] == null) {
return null;
}
double base = ((Number) data[0]).doubleValue();
double exponent = ((Number) data[1]).doubleValue();
double val;
if (base == 0) {
if (exponent < 0) {
throw Error.error(ErrorCode.X_2201F);
} else if (exponent == 0) {
val = 1;
} else {
val = 0;
}
} else {
val = Math.pow(base, exponent);
}
return ValuePool.getDouble(Double.doubleToLongBits(val));
}
case FUNC_SQRT : {
if (data[0] == null) {
return null;
}
double d = ((Number) data[0]).doubleValue();
if (d < 0) {
if (session.database.sqlDoubleNaN) {
throw Error.error(ErrorCode.X_2201E);
}
}
double val = Math.sqrt(((Number) data[0]).doubleValue());
return ValuePool.getDouble(Double.doubleToLongBits(val));
}
case FUNC_FLOOR : {
if (data[0] == null) {
return null;
}
return ((NumberType) dataType).floor(data[0]);
}
case FUNC_CEILING : {
if (data[0] == null) {
return null;
}
return ((NumberType) dataType).ceiling(data[0]);
}
case FUNC_WIDTH_BUCKET : {
for (int i = 0; i < data.length; i++) {
if (data[i] == null) {
return null;
}
data[i] = nodeDataTypes[i].convertToType(session, data[i],
nodes[i].dataType);
}
if (nodeDataTypes[3].isNegative(data[3])) {
throw Error.error(ErrorCode.X_2201G);
}
int compare = nodeDataTypes[1].compare(session, data[1],
data[2]);
Type subType;
Object temp;
Object temp2;
if (nodeDataTypes[0].isNumberType()) {
subType = nodeDataTypes[0];
} else {
subType = nodeDataTypes[0].getCombinedType(session,
nodeDataTypes[0], OpTypes.SUBTRACT);
}
switch (compare) {
case 0 :
throw Error.error(ErrorCode.X_2201G);
case -1 : {
if (nodeDataTypes[0].compare(session, data[0], data[1])
< 0) {
return ValuePool.INTEGER_0;
}
if (nodeDataTypes[0].compare(session, data[0], data[2])
>= 0) {
return dataType.add(session, data[3],
ValuePool.INTEGER_1,
Type.SQL_INTEGER);
}
temp = subType.subtract(session, data[0], data[1],
nodeDataTypes[1]);
temp2 = subType.subtract(session, data[2], data[1],
nodeDataTypes[1]);
break;
}
case 1 : {
if (nodeDataTypes[0].compare(session, data[0], data[1])
> 0) {
return ValuePool.INTEGER_0;
}
if (nodeDataTypes[0].compare(session, data[0], data[2])
<= 0) {
return dataType.add(session, data[3],
ValuePool.INTEGER_1,
Type.SQL_INTEGER);
}
temp = subType.subtract(session, data[1], data[0],
nodeDataTypes[0]);
temp2 = subType.subtract(session, data[1], data[2],
nodeDataTypes[2]);
break;
}
default :
throw Error.runtimeError(ErrorCode.U_S0500, "");
}
Type opType;
if (subType.typeCode == Types.SQL_DOUBLE) {
opType = subType;
} else {
opType = IntervalType.factorType;
temp = opType.convertToType(session, temp, subType);
temp2 = opType.convertToType(session, temp2, subType);
}
temp = opType.multiply(temp, data[3]);
temp = opType.divide(session, temp, temp2);
temp = dataType.convertToDefaultType(session, temp);
return dataType.add(session, temp, ValuePool.INTEGER_1,
Type.SQL_INTEGER);
}
case FUNC_SUBSTRING_CHAR : {
if (data[0] == null || data[1] == null) {
return null;
}
Object value;
value = Type.SQL_BIGINT.convertToType(session, data[1],
nodes[1].dataType);
long offset = ((Number) value).longValue() - 1;
long length = 0;
if (nodes[2] != null) {
if (data[2] == null) {
return null;
}
value = Type.SQL_BIGINT.convertToType(session, data[2],
nodes[2].dataType);
length = ((Number) value).longValue();
}
if (nodes.length > 3 && nodes[3] != null
&& ((Number) nodes[2].valueData).intValue()
== Tokens.OCTETS) {
// not clear what the rules on USING OCTECTS are with UTF
}
return ((CharacterType) dataType).substring(session, data[0],
offset, length, nodes[2] != null, false);
}
/*
case FUNCTION_SUBSTRING_REG_EXPR :
break;
case FUNCTION_SUBSTRING_REGEX :
break;
*/
case FUNC_FOLD_LOWER :
if (data[0] == null) {
return null;
}
return ((CharacterType) dataType).lower(session, data[0]);
case FUNC_FOLD_UPPER :
if (data[0] == null) {
return null;
}
return ((CharacterType) dataType).upper(session, data[0]);
/*
case FUNCTION_TRANSCODING :
break;
case FUNCTION_TRANSLITERATION :
break;
case FUNCTION_REGEX_TRANSLITERATION :
break;
*/
case FUNC_TRIM_CHAR : {
if (data[1] == null || data[2] == null) {
return null;
}
boolean leading = false;
boolean trailing = false;
switch (((Number) nodes[0].valueData).intValue()) {
case Tokens.BOTH :
leading = trailing = true;
break;
case Tokens.LEADING :
leading = true;
break;
case Tokens.TRAILING :
trailing = true;
break;
default :
throw Error.runtimeError(ErrorCode.U_S0500,
"FunctionSQL");
}
String string = (String) data[1];
if (string.length() != 1) {
throw Error.error(ErrorCode.X_22027);
}
char character = string.charAt(0);
return ((CharacterType) dataType).trim(session, data[2],
character, leading,
trailing);
}
case FUNC_OVERLAY_CHAR : {
if (data[0] == null || data[1] == null || data[2] == null) {
return null;
}
Object value;
value = Type.SQL_BIGINT.convertToType(session, data[2],
nodes[2].dataType);
long offset = ((Number) value).longValue() - 1;
long length = 0;
if (nodes[3] != null) {
if (data[3] == null) {
return null;
}
value = Type.SQL_BIGINT.convertToType(session, data[3],
nodes[3].dataType);
length = ((Number) value).longValue();
}
return ((CharacterType) dataType).overlay(null, data[0],
data[1], offset, length, nodes[3] != null);
}
/*
case FUNCTION_CHAR_NORMALIZE :
break;
*/
case FUNC_SUBSTRING_BINARY : {
if (data[0] == null || data[1] == null) {
return null;
}
Object value;
value = Type.SQL_BIGINT.convertToType(session, data[1],
nodes[1].dataType);
long offset = ((Number) value).longValue() - 1;
long length = 0;
if (nodes[2] != null) {
if (data[2] == null) {
return null;
}
value = Type.SQL_BIGINT.convertToType(session, data[2],
nodes[2].dataType);
length = ((Number) value).intValue();
}
return ((BinaryType) dataType).substring(session,
(BlobData) data[0], offset, length, nodes[2] != null);
}
case FUNC_TRIM_BINARY : {
if (data[1] == null || data[2] == null) {
return null;
}
boolean leading = false;
boolean trailing = false;
int spec = ((Number) nodes[0].valueData).intValue();
switch (spec) {
case Tokens.BOTH :
leading = trailing = true;
break;
case Tokens.LEADING :
leading = true;
break;
case Tokens.TRAILING :
trailing = true;
break;
default :
throw Error.runtimeError(ErrorCode.U_S0500,
"FunctionSQL");
}
BlobData string = (BlobData) data[1];
if (string.length(session) != 1) {
throw Error.error(ErrorCode.X_22027);
}
byte[] bytes = string.getBytes();
return ((BinaryType) dataType).trim(session,
(BlobData) data[2],
bytes[0], leading,
trailing);
}
case FUNC_OVERLAY_BINARY : {
if (data[0] == null || data[1] == null || data[2] == null) {
return null;
}
Object value;
value = Type.SQL_BIGINT.convertToType(session, data[2],
nodes[2].dataType);
long offset = ((Number) value).longValue() - 1;
long length = 0;
if (nodes[3] != null) {
if (data[3] == null) {
return null;
}
value = Type.SQL_BIGINT.convertToType(session, data[3],
nodes[3].dataType);
length = ((Number) value).longValue();
}
return ((BinaryType) dataType).overlay(session,
(BlobData) data[0],
(BlobData) data[1],
offset, length,
nodes[3] != null);
}
case FUNC_CURRENT_CATALOG :
return session.database.getCatalogName().name;
/*
case FUNC_CURRENT_DEFAULT_TRANSFORM_GROUP :
case FUNC_CURRENT_PATH :
*/
case FUNC_CURRENT_ROLE :
return session.getRole() == null ? null
: session.getRole().getName()
.getNameString();
case FUNC_CURRENT_SCHEMA :
return session.getCurrentSchemaHsqlName().name;
/*
case FUNC_CURRENT_TRANSFORM_GROUP_FOR_TYPE :
*/
case FUNC_CURRENT_USER :
return session.getUser().getName().getNameString();
case FUNC_SESSION_USER :
return session.getUser().getName().getNameString();
case FUNC_SYSTEM_USER :
return session.getUser().getName().getNameString();
case FUNC_USER :
return session.getUser().getName().getNameString();
case FUNC_VALUE :
return session.sessionData.currentValue;
case FUNC_CURRENT_DATE :
if (session.database.sqlSyntaxOra) {
return dataType.convertToTypeLimits(
session, session.getCurrentTimestamp(false));
}
return session.getCurrentDate();
case FUNC_CURRENT_TIME :
return dataType.convertToTypeLimits(
session, session.getCurrentTime(true));
case FUNC_CURRENT_TIMESTAMP :
return dataType.convertToTypeLimits(
session, session.getCurrentTimestamp(true));
case FUNC_LOCALTIME :
return dataType.convertToTypeLimits(
session, session.getCurrentTime(false));
case FUNC_LOCALTIMESTAMP :
return dataType.convertToTypeLimits(
session, session.getCurrentTimestamp(false));
default :
throw Error.runtimeError(ErrorCode.U_S0500, "FunctionSQL");
}
}
public void resolveTypes(Session session, Expression parent) {
for (int i = 0; i < nodes.length; i++) {
if (nodes[i] != null) {
nodes[i].resolveTypes(session, this);
}
}
switch (funcType) {
case FUNC_POSITION_CHAR :
case FUNC_POSITION_BINARY : {
if (nodes[0].dataType == null) {
if (nodes[1].dataType == null) {
throw Error.error(ErrorCode.X_42567);
}
if (nodes[1].dataType.typeCode == Types.SQL_CLOB
|| nodes[1].dataType.isBinaryType()) {
nodes[0].dataType = nodes[1].dataType;
} else {
nodes[0].dataType = Type.SQL_VARCHAR;
}
}
if (nodes[1].dataType == null) {
if (nodes[0].dataType.typeCode == Types.SQL_CLOB
|| nodes[0].dataType.isBinaryType()) {
nodes[1].dataType = nodes[0].dataType;
} else {
nodes[1].dataType = Type.SQL_VARCHAR;
}
}
if (nodes[0].dataType.isCharacterType()
&& nodes[1].dataType.isCharacterType()) {
funcType = FUNC_POSITION_CHAR;
} else if (nodes[0].dataType.isBinaryType()
&& nodes[1].dataType.isBinaryType()) {
if (nodes[0].dataType.isBitType()
|| nodes[1].dataType.isBitType()) {
throw Error.error(ErrorCode.X_42563);
}
funcType = FUNC_POSITION_BINARY;
} else {
throw Error.error(ErrorCode.X_42563);
}
if (nodes.length > 3 && nodes[3] != null) {
if (nodes[3].isDynamicParam()) {
nodes[3].dataType = Type.SQL_BIGINT;
}
if (!nodes[3].dataType.isNumberType()) {
throw Error.error(ErrorCode.X_42563);
}
}
dataType = Type.SQL_BIGINT;
break;
}
/*
case FUNC_OCCURENCES_REGEX :
case FUNC_POSITION_REGEX :
*/
case FUNC_EXTRACT : {
if (nodes[1].dataType == null) {
throw Error.error(ErrorCode.X_42567);
}
if (!nodes[1].dataType.isDateTimeType()
&& !nodes[1].dataType.isIntervalType()) {
throw Error.error(ErrorCode.X_42563);
}
int part = ((Number) nodes[0].valueData).intValue();
DTIType type = (DTIType) nodes[1].dataType;
part = DTIType.getFieldNameTypeForToken(part);
dataType = type.getExtractType(part);
break;
}
case FUNC_BIT_LENGTH : {
if (nodes[0].dataType == null) {
nodes[0].dataType = Type.SQL_BIT_VARYING_MAX_LENGTH;
}
if (!nodes[0].dataType.isCharacterType()
&& !nodes[0].dataType.isBinaryType()) {
throw Error.error(ErrorCode.X_42563);
}
dataType = Type.SQL_BIGINT;
break;
}
case FUNC_CHAR_LENGTH :
if (nodes[0].dataType == null) {
nodes[0].dataType = Type.SQL_VARCHAR;
}
if (!nodes[0].dataType.isCharacterType()) {
throw Error.error(ErrorCode.X_42563);
}
// fall through
case FUNC_OCTET_LENGTH : {
if (nodes[0].dataType == null) {
nodes[0].dataType = Type.SQL_VARCHAR;
}
if (!nodes[0].dataType.isCharacterType()
&& !nodes[0].dataType.isBinaryType()) {
throw Error.error(ErrorCode.X_42563);
}
dataType = Type.SQL_BIGINT;
break;
}
case FUNC_CARDINALITY : {
if (nodes[0].dataType == null) {
throw Error.error(ErrorCode.X_42567);
}
if (!nodes[0].dataType.isArrayType()) {
throw Error.error(ErrorCode.X_42563);
}
dataType = Type.SQL_INTEGER;
break;
}
case FUNC_MAX_CARDINALITY : {
if (nodes[0].dataType == null) {
throw Error.error(ErrorCode.X_42567);
}
if (!nodes[0].dataType.isArrayType()) {
throw Error.error(ErrorCode.X_42563);
}
dataType = Type.SQL_INTEGER;
break;
}
case FUNC_TRIM_ARRAY : {
if (nodes[0].dataType == null) {
throw Error.error(ErrorCode.X_42567);
}
if (!nodes[0].dataType.isArrayType()) {
throw Error.error(ErrorCode.X_42563);
}
if (nodes[1].dataType == null) {
nodes[1].dataType = Type.SQL_INTEGER;
}
if (!nodes[1].dataType.isIntegralType()) {
throw Error.error(ErrorCode.X_42563);
}
dataType = nodes[0].dataType;
break;
}
case FUNC_MOD : {
if (nodes[0].dataType == null) {
nodes[0].dataType = nodes[1].dataType;
}
if (nodes[1].dataType == null) {
nodes[1].dataType = nodes[0].dataType;
}
if (nodes[0].dataType == null) {
throw Error.error(ErrorCode.X_42567);
}
if (!nodes[0].dataType.isNumberType()
|| !nodes[1].dataType.isNumberType()) {
throw Error.error(ErrorCode.X_42563);
}
nodeDataTypes = new Type[2];
if (session.database.sqlSyntaxOra) {
nodeDataTypes[0] =
nodes[0].dataType.getAggregateType(nodes[1].dataType);
nodeDataTypes[1] = nodes[1].dataType;
} else {
nodeDataTypes[0] =
((NumberType) nodes[0].dataType).getIntegralType();
nodeDataTypes[1] =
((NumberType) nodes[1].dataType).getIntegralType();
}
dataType = nodeDataTypes[1];
break;
}
case FUNC_POWER : {
if (nodes[0].dataType == null) {
nodes[0].dataType = nodes[1].dataType;
}
if (nodes[1].dataType == null) {
nodes[1].dataType = nodes[0].dataType;
}
if (nodes[0].dataType == null) {
throw Error.error(ErrorCode.X_42567);
}
if (!nodes[0].dataType.isNumberType()
|| !nodes[1].dataType.isNumberType()) {
throw Error.error(ErrorCode.X_42563);
}
dataType = Type.SQL_DOUBLE;
break;
}
case FUNC_LN :
case FUNC_EXP :
case FUNC_SQRT : {
if (nodes[0].dataType == null) {
nodes[0].dataType = Type.SQL_DOUBLE;
}
if (!nodes[0].dataType.isNumberType()) {
throw Error.error(ErrorCode.X_42563);
}
dataType = Type.SQL_DOUBLE;
break;
}
case FUNC_ABS :
if (nodes[0].dataType != null
&& nodes[0].dataType.isIntervalType()) {
dataType = nodes[0].dataType;
break;
}
// fall through
case FUNC_FLOOR :
case FUNC_CEILING : {
if (nodes[0].dataType == null) {
nodes[0].dataType = Type.SQL_DOUBLE;
}
if (!nodes[0].dataType.isNumberType()) {
throw Error.error(ErrorCode.X_42563);
}
dataType = nodes[0].dataType;
if (dataType.typeCode == Types.SQL_DECIMAL
|| dataType.typeCode == Types.SQL_NUMERIC) {
if (dataType.scale > 0) {
dataType = NumberType.getNumberType(dataType.typeCode,
dataType.precision
+ 1, 0);
}
}
break;
}
case FUNC_WIDTH_BUCKET : {
nodeDataTypes = new Type[4];
nodeDataTypes[0] = Type.getAggregateType(nodes[0].dataType,
nodes[1].dataType);
nodeDataTypes[0] = Type.getAggregateType(nodeDataTypes[0],
nodes[2].dataType);
if (nodeDataTypes[0] == null) {
throw Error.error(ErrorCode.X_42567);
}
if (!nodeDataTypes[0].isNumberType()
&& !nodeDataTypes[0].isDateTimeType()) {
throw Error.error(ErrorCode.X_42563);
}
nodeDataTypes[1] = nodeDataTypes[0];
nodeDataTypes[2] = nodeDataTypes[0];
if (nodes[1].dataType == null) {
nodes[1].dataType = nodeDataTypes[1];
}
if (nodes[2].dataType == null) {
nodes[2].dataType = nodeDataTypes[2];
}
if (nodes[3].dataType == null) {
nodes[3].dataType = Type.SQL_INTEGER;
}
if (!nodes[3].dataType.isIntegralType()) {
throw Error.error(ErrorCode.X_42563);
}
nodeDataTypes[3] = nodes[3].dataType;
dataType = nodes[3].dataType;
break;
}
case FUNC_SUBSTRING_CHAR :
case FUNC_SUBSTRING_BINARY : {
if (nodes[0].dataType == null) {
// in 20.6 parameter not allowed as type cannot be determined as binary or char
// throw Error.error(ErrorCode.X_42567);
nodes[0].dataType = Type.SQL_VARCHAR_DEFAULT;
}
if (nodes[1].dataType == null) {
nodes[1].dataType = Type.SQL_NUMERIC;
}
if (!nodes[1].dataType.isNumberType()) {
throw Error.error(ErrorCode.X_42563);
}
if (nodes[2] != null) {
if (nodes[2].dataType == null) {
nodes[2].dataType = Type.SQL_NUMERIC;
}
if (!nodes[2].dataType.isNumberType()) {
throw Error.error(ErrorCode.X_42563);
}
}
dataType = nodes[0].dataType;
if (dataType.isCharacterType()) {
funcType = FUNC_SUBSTRING_CHAR;
if (dataType.typeCode == Types.SQL_CHAR) {
dataType = CharacterType.getCharacterType(
Types.SQL_VARCHAR, dataType.precision,
dataType.getCollation());
}
} else if (dataType.isBinaryType()) {
funcType = FUNC_SUBSTRING_BINARY;
} else {
throw Error.error(ErrorCode.X_42563);
}
if (nodes.length > 3 && nodes[3] != null) {
// always boolean constant if defined
}
break;
}
/*
case FUNCTION_SUBSTRING_REG_EXPR :
break;
case FUNCTION_SUBSTRING_REGEX :
break;
*/
case FUNC_FOLD_LOWER :
case FUNC_FOLD_UPPER :
if (nodes[0].dataType == null) {
nodes[0].dataType = Type.SQL_VARCHAR_DEFAULT;
}
dataType = nodes[0].dataType;
if (!dataType.isCharacterType()) {
throw Error.error(ErrorCode.X_42563);
}
break;
/*
case FUNCTION_TRANSCODING :
break;
case FUNCTION_TRANSLITERATION :
break;
case FUNCTION_REGEX_TRANSLITERATION :
break;
*/
case FUNC_TRIM_CHAR :
case FUNC_TRIM_BINARY :
if (nodes[0] == null) {
nodes[0] =
new ExpressionValue(ValuePool.getInt(Tokens.BOTH),
Type.SQL_INTEGER);
}
if (nodes[2].dataType == null) {
nodes[2].dataType = Type.SQL_VARCHAR_DEFAULT;
}
dataType = nodes[2].dataType;
if (dataType.isCharacterType()) {
funcType = FUNC_TRIM_CHAR;
if (dataType.typeCode == Types.SQL_CHAR) {
dataType = CharacterType.getCharacterType(
Types.SQL_VARCHAR, dataType.precision,
dataType.getCollation());
}
if (nodes[1] == null) {
nodes[1] = new ExpressionValue(" ", Type.SQL_CHAR);
}
} else if (dataType.isBinaryType()) {
funcType = FUNC_TRIM_BINARY;
if (nodes[1] == null) {
nodes[1] = new ExpressionValue(
new BinaryData(new byte[]{ 0 }, false),
Type.SQL_BINARY);
}
} else {
throw Error.error(ErrorCode.X_42563);
}
break;
case FUNC_OVERLAY_CHAR :
case FUNC_OVERLAY_BINARY : {
if (nodes[0].dataType == null) {
if (nodes[1].dataType == null) {
nodes[0].dataType = Type.SQL_VARCHAR_DEFAULT;
nodes[1].dataType = Type.SQL_VARCHAR_DEFAULT;
// throw Error.error(ErrorCode.X_42567);
}
if (nodes[1].dataType.typeCode == Types.SQL_CLOB
|| nodes[1].dataType.isBinaryType()) {
nodes[0].dataType = nodes[1].dataType;
} else {
nodes[0].dataType = Type.SQL_VARCHAR_DEFAULT;
}
}
if (nodes[1].dataType == null) {
if (nodes[0].dataType.typeCode == Types.SQL_CLOB
|| nodes[0].dataType.isBinaryType()) {
nodes[1].dataType = nodes[0].dataType;
} else {
nodes[1].dataType = Type.SQL_VARCHAR_DEFAULT;
}
}
if (nodes[0].dataType.isCharacterType()
&& nodes[1].dataType.isCharacterType()) {
funcType = FUNC_OVERLAY_CHAR;
if (nodes[0].dataType.typeCode == Types.SQL_CLOB
|| nodes[1].dataType.typeCode == Types.SQL_CLOB) {
dataType =
CharacterType
.getCharacterType(Types.SQL_CLOB,
nodes[0].dataType.precision
+ nodes[1].dataType
.precision, nodes[0]
.dataType
.getCollation());
} else {
dataType =
CharacterType
.getCharacterType(Types.SQL_VARCHAR,
nodes[0].dataType.precision
+ nodes[1].dataType
.precision, nodes[0]
.dataType
.getCollation());
}
} else if (nodes[0].dataType.isBinaryType()
&& nodes[1].dataType.isBinaryType()) {
funcType = FUNC_OVERLAY_BINARY;
if (nodes[0].dataType.typeCode == Types.SQL_BLOB
|| nodes[1].dataType.typeCode == Types.SQL_BLOB) {
dataType = BinaryType.getBinaryType(
Types.SQL_BLOB,
nodes[0].dataType.precision
+ nodes[1].dataType.precision);
} else {
dataType = BinaryType.getBinaryType(
Types.SQL_VARBINARY,
nodes[0].dataType.precision
+ nodes[1].dataType.precision);
}
} else {
throw Error.error(ErrorCode.X_42563);
}
if (nodes[2].dataType == null) {
nodes[2].dataType = Type.SQL_NUMERIC;
}
if (!nodes[2].dataType.isNumberType()) {
throw Error.error(ErrorCode.X_42563);
}
if (nodes[3] != null) {
if (nodes[3].dataType == null) {
nodes[3].dataType = Type.SQL_NUMERIC;
}
if (!nodes[3].dataType.isNumberType()) {
throw Error.error(ErrorCode.X_42563);
}
}
break;
}
/*
case FUNCTION_CHAR_NORMALIZE :
break;
*/
case FUNC_CURRENT_CATALOG :
case FUNC_CURRENT_DEFAULT_TRANSFORM_GROUP :
case FUNC_CURRENT_PATH :
case FUNC_CURRENT_ROLE :
case FUNC_CURRENT_SCHEMA :
case FUNC_CURRENT_TRANSFORM_GROUP_FOR_TYPE :
case FUNC_CURRENT_USER :
case FUNC_SESSION_USER :
case FUNC_SYSTEM_USER :
case FUNC_USER :
dataType = TypeInvariants.SQL_IDENTIFIER;
break;
case FUNC_VALUE :
break;
case FUNC_CURRENT_DATE :
if (session.database.sqlSyntaxOra) {
dataType = Type.SQL_TIMESTAMP_NO_FRACTION;
break;
}
dataType = Type.SQL_DATE;
break;
case FUNC_CURRENT_TIME : {
int precision = DateTimeType.defaultTimeFractionPrecision;
if (nodes.length > 0 && nodes[0] != null) {
precision = ((Integer) nodes[0].valueData).intValue();
}
dataType =
DateTimeType.getDateTimeType(Types.SQL_TIME_WITH_TIME_ZONE,
precision);
break;
}
case FUNC_CURRENT_TIMESTAMP : {
int precision = DateTimeType.defaultTimestampFractionPrecision;
if (nodes.length > 0 && nodes[0] != null) {
precision = ((Integer) nodes[0].valueData).intValue();
}
dataType = DateTimeType.getDateTimeType(
Types.SQL_TIMESTAMP_WITH_TIME_ZONE, precision);
break;
}
case FUNC_LOCALTIME : {
int precision = DateTimeType.defaultTimeFractionPrecision;
if (nodes.length > 0 && nodes[0] != null) {
precision = ((Integer) nodes[0].valueData).intValue();
}
dataType = DateTimeType.getDateTimeType(Types.SQL_TIME,
precision);
break;
}
case FUNC_LOCALTIMESTAMP : {
int precision = DateTimeType.defaultTimestampFractionPrecision;
if (nodes.length > 0 && nodes[0] != null) {
precision = ((Integer) nodes[0].valueData).intValue();
}
dataType = DateTimeType.getDateTimeType(Types.SQL_TIMESTAMP,
precision);
break;
}
default :
throw Error.runtimeError(ErrorCode.U_S0500, "FunctionSQL");
}
}
Object getExtractValue(Session session, Object[] data) {
if (data[1] == null) {
return null;
}
int part = ((Number) nodes[0].valueData).intValue();
part = DTIType.getFieldNameTypeForToken(part);
switch (part) {
case Types.SQL_INTERVAL_SECOND : {
return ((DTIType) nodes[1].dataType).getSecondPart(session,
data[1]);
}
case Types.DTI_MONTH_NAME :
case Types.DTI_DAY_NAME : {
return ((DateTimeType) nodes[1].dataType).getPartString(
session, data[1], part);
}
default : {
int value = ((DTIType) nodes[1].dataType).getPart(session,
data[1], part);
return ValuePool.getInt(value);
}
}
}
public String getSQL() {
StringBuilder sb = new StringBuilder();
switch (funcType) {
case FUNC_POSITION_CHAR :
case FUNC_POSITION_BINARY : {
sb.append(Tokens.T_POSITION).append('(') //
.append(nodes[0].getSQL()).append(' ') //
.append(Tokens.T_IN).append(' ') //
.append(nodes[1].getSQL());
if (nodes[2] != null
&& Boolean.TRUE.equals(nodes[2].valueData)) {
sb.append(' ').append(Tokens.T_USING).append(' ').append(
Tokens.T_OCTETS);
}
sb.append(')');
break;
}
case FUNC_OCCURENCES_REGEX :
break;
case FUNC_POSITION_REGEX :
break;
case FUNC_EXTRACT : {
int type = ((Integer) nodes[0].valueData).intValue();
type = DTIType.getFieldNameTypeForToken(type);
String token = DTIType.getFieldNameTokenForType(type);
sb.append(Tokens.T_EXTRACT).append('(').append(token) //
.append(' ').append(Tokens.T_FROM).append(' ') //
.append(nodes[1].getSQL()).append(')');
break;
}
case FUNC_CHAR_LENGTH : {
sb.append(Tokens.T_CHAR_LENGTH).append('(') //
.append(nodes[0].getSQL()).append(')');
break;
}
case FUNC_BIT_LENGTH : {
sb.append(Tokens.T_BIT_LENGTH).append('(') //
.append(nodes[0].getSQL()).append(')');
break;
}
case FUNC_OCTET_LENGTH : {
sb.append(Tokens.T_OCTET_LENGTH).append('(') //
.append(nodes[0].getSQL()).append(')');
break;
}
case FUNC_CARDINALITY : {
sb.append(Tokens.T_CARDINALITY).append('(') //
.append(nodes[0].getSQL()).append(')');
break;
}
case FUNC_MAX_CARDINALITY : {
sb.append(Tokens.T_MAX_CARDINALITY).append('(') //
.append(nodes[0].getSQL()).append(')');
break;
}
case FUNC_TRIM_ARRAY : {
sb.append(Tokens.T_TRIM_ARRAY).append('(') //
.append(nodes[0].getSQL()).append(',') //
.append(nodes[1].getSQL()).append(')'); //
break;
}
case FUNC_ABS : {
sb.append(Tokens.T_ABS).append('(') //
.append(nodes[0].getSQL()).append(')');
break;
}
case FUNC_MOD : {
sb.append(Tokens.T_MOD).append('(') //
.append(nodes[0].getSQL()).append(',') //
.append(nodes[1].getSQL()).append(')');
break;
}
case FUNC_LN : {
sb.append(Tokens.T_LN).append('(') //
.append(nodes[0].getSQL()).append(')');
break;
}
case FUNC_EXP : {
sb.append(Tokens.T_EXP).append('(') //
.append(nodes[0].getSQL()).append(')');
break;
}
case FUNC_POWER : {
sb.append(Tokens.T_POWER).append('(') //
.append(nodes[0].getSQL()).append(',') //
.append(nodes[1].getSQL()).append(')');
break;
}
case FUNC_SQRT : {
sb.append(Tokens.T_SQRT).append('(') //
.append(nodes[0].getSQL()).append(')');
break;
}
case FUNC_FLOOR : {
sb.append(Tokens.T_FLOOR).append('(') //
.append(nodes[0].getSQL()).append(')');
break;
}
case FUNC_CEILING : {
sb.append(Tokens.T_CEILING).append('(') //
.append(nodes[0].getSQL()).append(')');
break;
}
case FUNC_WIDTH_BUCKET : {
sb.append(Tokens.T_WIDTH_BUCKET).append('(') //
.append(nodes[0].getSQL()).append(',') //
.append(nodes[1].getSQL()).append(',') //
.append(nodes[2].getSQL()).append(',') //
.append(nodes[3].getSQL()).append(')');
break;
}
case FUNC_SUBSTRING_CHAR :
case FUNC_SUBSTRING_BINARY :
sb.append(Tokens.T_SUBSTRING).append('(') //
.append(nodes[0].getSQL()).append(' ') //
.append(Tokens.T_FROM).append(' ') //
.append(nodes[1].getSQL());
if (nodes[2] != null) {
sb.append(' ').append(Tokens.T_FOR).append(' ') //
.append(nodes[2].getSQL());
}
if (nodes.length > 3 && nodes[3] != null) {
if (Boolean.TRUE.equals(nodes[3].valueData)) {
sb.append(' ').append(Tokens.T_USING).append(
' ').append(Tokens.T_OCTETS);
}
}
sb.append(')');
break;
/*
case FUNCTION_SUBSTRING_REGEX :
break;
*/
case FUNC_FOLD_LOWER :
sb.append(Tokens.T_LOWER).append('(').append(
nodes[0].getSQL()).append(')');
break;
case FUNC_FOLD_UPPER :
sb.append(Tokens.T_UPPER).append('(').append(
nodes[0].getSQL()).append(')');
break;
/*
case FUNCTION_TRANSCODING :
break;
case FUNCTION_TRANSLITERATION :
break;
case FUNCTION_REGEX_TRANSLITERATION :
break;
*/
case FUNC_OVERLAY_CHAR :
case FUNC_OVERLAY_BINARY :
sb.append(Tokens.T_OVERLAY).append('(') //
.append(nodes[0].getSQL()).append(' ') //
.append(Tokens.T_PLACING).append(' ') //
.append(nodes[1].getSQL()).append(' ') //
.append(Tokens.T_FROM).append(' ') //
.append(nodes[2].getSQL());
if (nodes[3] != null) {
sb.append(' ').append(Tokens.T_FOR).append(' ').append(
nodes[3].getSQL());
}
if (nodes[4] != null) {
if (Boolean.TRUE.equals(nodes[4].valueData)) {
sb.append(' ').append(Tokens.T_USING).append(
' ').append(Tokens.T_OCTETS);
}
}
sb.append(')');
break;
/*
case FUNCTION_NORMALIZE :
break;
*/
case FUNC_TRIM_CHAR :
case FUNC_TRIM_BINARY :
String spec = null;
switch (((Number) nodes[0].valueData).intValue()) {
case Tokens.BOTH :
spec = Tokens.T_BOTH;
break;
case Tokens.LEADING :
spec = Tokens.T_LEADING;
break;
case Tokens.TRAILING :
spec = Tokens.T_TRAILING;
break;
default :
}
sb.append(Tokens.T_TRIM).append('(') //
.append(spec).append(' ') //
.append(nodes[1].getSQL()).append(' ') //
.append(Tokens.T_FROM).append(' ') //
.append(nodes[2].getSQL()).append(')');
break;
case FUNC_CURRENT_CATALOG :
case FUNC_CURRENT_DEFAULT_TRANSFORM_GROUP :
case FUNC_CURRENT_PATH :
case FUNC_CURRENT_ROLE :
case FUNC_CURRENT_SCHEMA :
case FUNC_CURRENT_TRANSFORM_GROUP_FOR_TYPE :
case FUNC_CURRENT_USER :
case FUNC_SESSION_USER :
case FUNC_SYSTEM_USER :
case FUNC_USER :
case FUNC_CURRENT_DATE :
case FUNC_VALUE :
return name;
case FUNC_LOCALTIME :
case FUNC_CURRENT_TIME : {
int precision = DateTimeType.defaultTimeFractionPrecision;
if (nodes.length > 0 && nodes[0] != null) {
precision = ((Number) nodes[0].valueData).intValue();
}
if (precision == DateTimeType.defaultTimeFractionPrecision) {
return name;
}
sb.append(name).append(Tokens.T_OPENBRACKET).append(precision);
sb.append(Tokens.T_CLOSEBRACKET);
return sb.toString();
}
case FUNC_LOCALTIMESTAMP :
case FUNC_CURRENT_TIMESTAMP : {
int precision = DateTimeType.defaultTimestampFractionPrecision;
if (nodes.length > 0 && nodes[0] != null) {
precision = ((Number) nodes[0].valueData).intValue();
}
if (precision
== DateTimeType.defaultTimestampFractionPrecision) {
return name;
}
sb.append(name).append(Tokens.T_OPENBRACKET).append(precision);
sb.append(Tokens.T_CLOSEBRACKET);
return sb.toString();
}
default :
throw Error.runtimeError(ErrorCode.U_S0500, "FunctionSQL");
}
return sb.toString();
}
boolean equals(Expression other) {
if (other instanceof FunctionSQL) {
FunctionSQL o = (FunctionSQL) other;
return super.equals(other) && funcType == o.funcType;
}
return false;
}
public int hashCode() {
return opType + funcType;
}
Returns a String representation of this object.
/**
* Returns a String representation of this object. <p>
*/
public String describe(Session session, int blanks) {
StringBuilder sb = new StringBuilder();
sb.append('\n');
for (int i = 0; i < blanks; i++) {
sb.append(' ');
}
sb.append("FUNCTION ").append("=[\n");
sb.append(name).append("(");
for (int i = 0; i < nodes.length; i++) {
if (nodes[i] == null) {
continue;
}
sb.append("[").append(nodes[i].describe(session,
blanks)).append("]");
}
sb.append(") returns ").append(dataType.getNameString());
sb.append("]\n");
return sb.toString();
}
public boolean isDeterministic() {
return isDeterministic;
}
public boolean isValueFunction() {
return isSQLValueFunction;
}
}