@Override
final Field<BigDecimal> getFunction0(Configuration configuration) {
switch (configuration.dialect().family()) {
case ASE:
case CUBRID:
case HSQLDB:
case INGRES:
case MARIADB:
case MYSQL:
case POSTGRES:
case SQLSERVER:
case SYBASE:
return DSL.exp(argument.mul(two())).sub(one()).div(DSL.exp(argument.mul(two())).add(one()));
default:
return function("tanh", SQLDataType.NUMERIC, argument);
}
}
@SuppressWarnings("unchecked")
@Override
final Field<T> getFunction0(Configuration configuration) {
SQLDialect dialect = configuration.getDialect();
// ---------------------------------------------------------------------
// XXX: Bitwise operators
// ---------------------------------------------------------------------
// DB2, H2 and HSQLDB know functions, instead of operators
if (BIT_AND == operator && asList(DB2, H2, HSQLDB, ORACLE).contains(dialect)) {
return function("bitand", getDataType(), getArguments());
} else if (BIT_AND == operator && FIREBIRD == dialect) {
return function("bin_and", getDataType(), getArguments());
} else if (BIT_XOR == operator && asList(DB2, H2, HSQLDB).contains(dialect)) {
return function("bitxor", getDataType(), getArguments());
} else if (BIT_XOR == operator && FIREBIRD == dialect) {
return function("bin_xor", getDataType(), getArguments());
} else if (BIT_OR == operator && asList(DB2, H2, HSQLDB).contains(dialect)) {
return function("bitor", getDataType(), getArguments());
} else if (BIT_OR == operator && FIREBIRD == dialect) {
return function("bin_or", getDataType(), getArguments());
}
// Oracle has to simulate or/xor
else if (BIT_OR == operator && ORACLE == dialect) {
return lhs.sub(bitAnd(lhsAsNumber(), rhsAsNumber())).add(rhsAsNumber());
}
// ~(a & b) & (a | b)
else if (BIT_XOR == operator && asList(ORACLE, SQLITE).contains(dialect)) {
return (Field<T>)
bitAnd(bitNot(bitAnd(lhsAsNumber(), rhsAsNumber())), bitOr(lhsAsNumber(), rhsAsNumber()));
}
// Many dialects don't support shifts. Use multiplication/division instead
else if (SHL == operator
&& asList(ASE, DB2, H2, HSQLDB, INGRES, ORACLE, SQLSERVER, SYBASE).contains(dialect)) {
return lhs.mul(Factory.power(two(), rhsAsNumber()));
} else if (SHR == operator
&& asList(ASE, DB2, H2, HSQLDB, INGRES, ORACLE, SQLSERVER, SYBASE).contains(dialect)) {
return lhs.div(Factory.power(two(), rhsAsNumber()));
}
// Some dialects support shifts as functions
else if (SHL == operator && FIREBIRD == dialect) {
return function("bin_shl", getDataType(), getArguments());
} else if (SHR == operator && FIREBIRD == dialect) {
return function("bin_shr", getDataType(), getArguments());
}
// These operators are not supported in any dialect
else if (BIT_NAND == operator) {
return (Field<T>) bitNot(bitAnd(lhsAsNumber(), rhsAsNumber()));
} else if (BIT_NOR == operator) {
return (Field<T>) bitNot(bitOr(lhsAsNumber(), rhsAsNumber()));
} else if (BIT_XNOR == operator) {
return (Field<T>) bitNot(bitXor(lhsAsNumber(), rhsAsNumber()));
}
// ---------------------------------------------------------------------
// XXX: Date time arithmetic operators
// ---------------------------------------------------------------------
// [#585] Date time arithmetic for numeric or interval RHS
else if (asList(ADD, SUBTRACT).contains(operator)
&& lhs.getDataType().isDateTime()
&& (rhs.get(0).getDataType().isNumeric() || rhs.get(0).getDataType().isInterval())) {
return new DateExpression();
}
// ---------------------------------------------------------------------
// XXX: Other operators
// ---------------------------------------------------------------------
// Use the default operator expression for all other cases
else {
return new DefaultExpression();
}
}