@Override
protected Object visitGenericLiteral(GenericLiteral node, ConnectorSession session) {
Type type = metadata.getType(parseTypeSignature(node.getType()));
if (type == null) {
throw new SemanticException(TYPE_MISMATCH, node, "Unknown type: " + node.getType());
}
if (JSON.equals(type)) {
ScalarFunctionImplementation operator =
metadata
.getFunctionRegistry()
.getScalarFunctionImplementation(
new Signature(
"json_parse", SCALAR, JSON.getTypeSignature(), VARCHAR.getTypeSignature()));
try {
return ExpressionInterpreter.invoke(
session, operator, ImmutableList.<Object>of(utf8Slice(node.getValue())));
} catch (Throwable throwable) {
throw Throwables.propagate(throwable);
}
}
ScalarFunctionImplementation operator;
try {
Signature signature = metadata.getFunctionRegistry().getCoercion(VARCHAR, type);
operator = metadata.getFunctionRegistry().getScalarFunctionImplementation(signature);
} catch (IllegalArgumentException e) {
throw new SemanticException(TYPE_MISMATCH, node, "No literal form for type %s", type);
}
try {
return ExpressionInterpreter.invoke(
session, operator, ImmutableList.<Object>of(utf8Slice(node.getValue())));
} catch (Throwable throwable) {
throw Throwables.propagate(throwable);
}
}
