PARSENODE_PTR SQLParser::parseStatement() {
if (!startsStatement(nowReading)) {
syntaxError(nowReading, "expect start token!");
return nullptr;
}
if (startsCreate(nowReading)) {
return parseCreate();
}
else if (startsSelect(nowReading)) {
return parseSelect();
}
else if (startsDelete(nowReading)) {
return parseDelete();
}
else if (startsInsert(nowReading)) {
return parseInsert();
}
else if (startsDrop(nowReading)) {
return parseDrop();
}
else if (nowReading == QUIT) {
readToken();
expect(TERMINATOR);
return PARSENODE_PTR(new ParseNode(QUIT));
}
else if (nowReading == EXECFILE) {
readToken();
expect(TERMINATOR);
return PARSENODE_PTR(new ParseNode(EXECFILE));
}
else {
assert(false);
return nullptr;
}
}
//static
Command* Command::parseTokens( Tokens& tokens, bool helpMode )
{
if (tokens.empty()) THROW( CWDB_ERR_PARSER, "Bad syntax: no tokens to parse");
Command* result = 0;
try {
switch(tokens.front().m_angen) {
case ANGEN_CREATE: parseCreate( tokens, helpMode, result ); break;
case ANGEN_DESCR: parseDescr( tokens, helpMode, result ); break;
case ANGEN_DROP: parseDrop( tokens, helpMode, result ); break;
case ANGEN_DUMP: parseDump( tokens, helpMode, result ); break;
case ANGEN_GET:
case ANGEN_SET:
case ANGEN_PUT: parseInput( tokens, helpMode, result ); break;
case ANGEN_QUERY: parseQuery( tokens, helpMode, result ); break;
case ANGEN_USE: parseUse( tokens, helpMode, result ); break;
case ANGEN_GENERATE: parseGenerate( tokens, helpMode, result ); break;
case ANGEN_VERSION: parseVersion( tokens, helpMode, result ); break;
case ANGEN_FORMAT: parseFormat( tokens, helpMode, result ); break;
case ANGEN_COMPACT: parseCompact( tokens, helpMode, result ); break;
case ANGEN_UPDATE: parseUpdate( tokens, helpMode, result ); break;
case ANGEN_START:
case ANGEN_STOP: parseStart( tokens, helpMode, result ); break;
case ANGEN_EXPORT: parseExport( tokens, helpMode, result ); break;
case ANGEN_IMPORT: parseImport( tokens, helpMode, result ); break;
default: THROW( CWDB_ERR_PARSER, "Bad syntax: unknown command" );
}
}
catch (CWDBException& e) {
if (result != 0) {
delete result;
result = 0;
}
throw e;
}
return result;
}
