// Parse MySQL CREATE TABLE storage clause
bool SqlParser::ParseMysqlStorageClause(Token *table_name, Token **id_start, Token **comment_out)
{
bool exists = false;
// Auto_increment start value
Token *auto_start = NULL;
while(true)
{
Token *next = GetNextToken();
if(next == NULL)
break;
// ENGINE = type
if(next->Compare("ENGINE", L"ENGINE", 6) == true)
{
// Equal sign = is optional in the clause
Token *equal = GetNextCharToken('=', L'=');
Token *type = GetNextToken();
if(_target != SQL_MYSQL)
{
Token::Remove(next);
Token::Remove(equal);
Token::Remove(type);
}
exists = true;
continue;
}
else
// AUTO_INCREMENT = start table option
if(next->Compare("AUTO_INCREMENT", L"AUTO_INCREMENT", 14) == true)
{
// Equal sign = is optional in the clause
Token *equal = GetNextCharToken('=', L'=');
auto_start = GetNextNumberToken();
if(_target != SQL_MYSQL)
{
Token::Remove(next);
Token::Remove(equal);
Token::Remove(auto_start);
}
exists = true;
continue;
}
else
// DEFAULT CHARSET
if(next->Compare("DEFAULT", L"DEFAULT", 7) == true)
{
Token *option = GetNextToken();
if(option == NULL)
break;
// CHARSET
if(option->Compare("CHARSET", L"CHARSET", 7) == true)
{
Token *equal = GetNextCharToken('=', L'=');
Token *value = GetNextIdentToken();
if(_target != SQL_MYSQL)
Token::Remove(next, value);
}
else
// CHARACTER SET
if(option->Compare("CHARACTER", L"CHARACTER", 9) == true)
{
Token *set = GetNextWordToken("SET", L"SET", 3);
Token *equal = GetNextCharToken('=', L'=');
Token *value = GetNextIdentToken();
if(_target != SQL_MYSQL)
Token::Remove(next, value);
}
exists = true;
continue;
}
else
// COLLATE = value
if(next->Compare("COLLATE", L"COLLATE", 7) == true)
{
Token *equal = GetNextCharToken('=', L'=');
Token *value = GetNextIdentToken();
if(_target != SQL_MYSQL)
Token::Remove(next, value);
exists = true;
continue;
}
else
// COMMENT = 'table comment'
if(next->Compare("COMMENT", L"COMMENT", 7) == true)
{
// Equal sign = is optional in the clause
Token *equal = GetNextCharToken('=', L'=');
Token *text = GetNextToken();
if(comment_out != NULL)
*comment_out = text;
// Remove from CREATE TABLE
if(_target != SQL_MYSQL)
Token::Remove(next, text);
exists = true;
continue;
}
else
// PACK_KEYS = 0 | 1 | DEFAULT
if(next->Compare("PACK_KEYS", L"PACK_KEYS", 9) == true)
{
// Optional =
Token *equal = GetNextCharToken('=', L'=');
Token *value = GetNextToken();
if(_target != SQL_MYSQL)
Token::Remove(next, value);
exists = true;
continue;
}
else
// ROW_FORMAT = type | DEFAULT
if(next->Compare("ROW_FORMAT", L"ROW_FORMAT", 10) == true)
{
// Optional =
Token *equal = GetNextCharToken('=', L'=');
Token *value = GetNextToken();
if(_target != SQL_MYSQL)
Token::Remove(next, value);
exists = true;
continue;
}
// Not a MySQL stoage clause
PushBack(next);
break;
}
if(id_start != NULL)
*id_start = auto_start;
// Restart sequence for PostgreSQL and Greenplum
if(auto_start != NULL && (_target == SQL_POSTGRESQL || _target == SQL_GREENPLUM))
{
// Try to get ;
Token *semi = GetNextCharToken(';', L';');
Token *last = (semi != NULL) ? semi : GetLastToken();
// Append ALTER SEQUENCE command
Append(last, "\n\nALTER SEQUENCE ", L"\n\nALTER SEQUENCE ", 17);
// Add sequence name
Token *seq_name = AppendIdentifier(table_name, "_seq", L"_seq", 4);
Append(last, seq_name);
Append(last, " RESTART WITH ", L" RESTART WITH ", 14);
AppendCopy(last, auto_start);
Append(last, ";", L";", 1);
}
return exists;
}
// DB2 identity options in GENERATED ALWAYS or BY DEFAULT AS IDENTITY
bool SqlParser::ParseDb2GeneratedClause(Token *create, Token *table_name, Token *column, Token *generated,
Token **id_col, Token **id_start, Token **id_inc, bool *id_default)
{
if(generated == NULL)
return false;
Token *always = GetNextWordToken("ALWAYS", L"ALWAYS", 6);
Token *by = NULL;
Token *default_ = NULL;
if(always == NULL)
{
by = GetNextWordToken("BY", L"BY", 2);
default_ = GetNextWordToken("DEFAULT", L"DEFAULT", 7);
if(id_default != NULL)
*id_default = true;
}
else
{
if(id_default != NULL)
*id_default = false;
}
Token *as = GetNextWordToken("AS", L"AS", 2);
Token *identity = GetNextWordToken("IDENTITY", L"IDENTITY", 8);
// Identity parameters are optional
Token *open = GetNextCharToken('(', L'(');
Token *close = NULL;
Token *start_with = NULL;
Token *increment_by = NULL;
while(true)
{
bool exists = false;
if(open == NULL)
break;
Token *option = GetNextToken();
if(option == NULL)
break;
// START WITH
if(option->Compare("START", L"START", 5) == true)
{
/*Token *with */ (void) GetNextWordToken("WITH", L"WITH", 4);
start_with = GetNextNumberToken();
exists = true;
continue;
}
else
// INCREMENT BY
if(option->Compare("INCREMENT", L"INCREMENT", 9) == true)
{
/*Token *by */ (void) GetNextWordToken("BY", L"BY", 2);
increment_by = GetNextNumberToken();
exists = true;
continue;
}
else
// MINVALUE
if(option->Compare("MINVALUE", L"MINVALUE", 8) == true)
{
/*Token *value */ (void) GetNextNumberToken();
exists = true;
continue;
}
else
// MAXVALUE
if(option->Compare("MAXVALUE", L"MAXVALUE", 8) == true)
{
/*Token *value */ (void) GetNextNumberToken();
exists = true;
continue;
}
else
// NO CYCLE and NO ORDER
if(option->Compare("NO", L"NO", 2) == true)
{
/*Token *attr */ (void) GetNextToken();
exists = true;
continue;
}
else
// CACHE
if(option->Compare("CACHE", L"CACHE", 5) == true)
{
/*Token *value */ (void) GetNextNumberToken();
exists = true;
continue;
}
else
// CYCLE
if(option->Compare("CYCLE", L"CYCLE", 5) == true)
{
exists = true;
continue;
}
else
// Looks like comma is optional
if(option->Compare(',', L',') == true)
{
exists = true;
continue;
}
PushBack(option);
break;
}
if(open != NULL)
close = GetNextCharToken(')', L')');
// IDENTITY(start, inc) in SQL Server
if(_target == SQL_SQL_SERVER)
{
Token::Change(generated, "IDENTITY(", L"IDENTITY(", 9);
AppendCopy(generated, start_with);
if(increment_by != NULL)
{
Append(generated, ", ", L", ", 2);
AppendCopy(generated, increment_by);
}
Append(generated, ")", L")", 1);
if(always != NULL)
Token::Remove(always, close);
else
Token::Remove(by, close);
}
else
// Use a sequence and DEFAULT nextval for PostgreSQL and Greenplum
if(_target == SQL_POSTGRESQL || _target == SQL_GREENPLUM)
{
TokenStr seq_name(table_name);
AppendIdentifier(seq_name, "_seq", L"_seq", 4);
// Generate CREATE SEQUENCE before CREATE TABLE
Prepend(create, "CREATE SEQUENCE ", L"CREATE SEQUENCE ", 16);
PrependNoFormat(create, &seq_name);
if(start_with != NULL)
{
Prepend(create, " START WITH ", L" START WITH ", 12);
PrependCopy(create, start_with);
}
if(increment_by != NULL)
{
Prepend(create, " INCREMENT BY ", L" INCREMENT BY ", 14);
PrependCopy(create, increment_by);
}
Prepend(create, ";\n\n", L";\n\n", 3);
// Generate DEFAULT nextval('tablename_seq') clause
Token::Change(generated, "DEFAULT ", L"DEFAULT ", 8);
Append(generated, "nextval ('", L"nextval ('", 10);
AppendNoFormat(generated, &seq_name);
Append(generated, "')", L"')", 2);
if(always != NULL)
Token::Remove(always, close);
else
Token::Remove(by, close);
}
else
// Remove for other databases
if(_target != SQL_DB2)
{
Token::Remove(generated);
Token::Remove(always);
Token::Remove(by, default_);
Token::Remove(as, identity);
Token::Remove(open, close);
}
if(id_col != NULL)
*id_col = column;
if(id_start != NULL)
*id_start = start_with;
if(id_inc != NULL)
*id_inc = increment_by;
return true;
}
