/// <summary>
/// Prepares CommandText for use with the Prepare method
/// </summary>
/// <returns>Command text stripped of all paramter names</returns>
/// <remarks>
/// Takes the output of TokenizeSql and creates a single string of SQL
/// that only contains '?' markers for each parameter. It also creates
/// the parameterMap array list that includes all the paramter names in the
/// order they appeared in the SQL
/// </remarks>
private List <string> PrepareCommandText(out string stripped_sql)
{
StringBuilder newSQL = new StringBuilder();
List <string> parameterMap = new List <string>();
int startPos = 0;
string sql = ResolvedCommandText;
MyCatTokenizer tokenizer = new MyCatTokenizer(sql);
string parameter = tokenizer.NextParameter();
while (parameter != null)
{
if (parameter.IndexOf(StoredProcedure.ParameterPrefix) == -1)
{
newSQL.Append(sql.Substring(startPos, tokenizer.StartIndex - startPos));
newSQL.Append("?");
parameterMap.Add(parameter);
startPos = tokenizer.StopIndex;
}
parameter = tokenizer.NextParameter();
}
newSQL.Append(sql.Substring(startPos));
stripped_sql = newSQL.ToString();
return(parameterMap);
}
private static void ParseConstraint(MyCatSchemaCollection fkTable, MyCatSchemaRow table,
MyCatTokenizer tokenizer, bool includeColumns)
{
string name = tokenizer.NextToken();
MyCatSchemaRow row = fkTable.AddRow();
// make sure this constraint is a FK
string token = tokenizer.NextToken();
if (token != "foreign" || tokenizer.Quoted)
{
return;
}
tokenizer.NextToken(); // read off the 'KEY' symbol
tokenizer.NextToken(); // read off the '(' symbol
row["CONSTRAINT_CATALOG"] = table["TABLE_CATALOG"];
row["CONSTRAINT_SCHEMA"] = table["TABLE_SCHEMA"];
row["TABLE_CATALOG"] = table["TABLE_CATALOG"];
row["TABLE_SCHEMA"] = table["TABLE_SCHEMA"];
row["TABLE_NAME"] = table["TABLE_NAME"];
row["REFERENCED_TABLE_CATALOG"] = null;
row["CONSTRAINT_NAME"] = name.Trim(new char[] { '\'', '`' });
List <string> srcColumns = includeColumns ? ParseColumns(tokenizer) : null;
// now look for the references section
while (token != "references" || tokenizer.Quoted)
{
token = tokenizer.NextToken();
}
string target1 = tokenizer.NextToken();
string target2 = tokenizer.NextToken();
if (target2.StartsWith(".", StringComparison.Ordinal))
{
row["REFERENCED_TABLE_SCHEMA"] = target1;
row["REFERENCED_TABLE_NAME"] = target2.Substring(1).Trim(new char[] { '\'', '`' });
tokenizer.NextToken(); // read off the '('
}
else
{
row["REFERENCED_TABLE_SCHEMA"] = table["TABLE_SCHEMA"];
row["REFERENCED_TABLE_NAME"] = target1.Substring(1).Trim(new char[] { '\'', '`' });;
}
// if we are supposed to include columns, read the target columns
List <string> targetColumns = includeColumns ? ParseColumns(tokenizer) : null;
if (includeColumns)
{
ProcessColumns(fkTable, row, srcColumns, targetColumns);
}
else
{
fkTable.Rows.Add(row);
}
}
private void InternalBindParameters(string sql, MyCatParameterCollection parameters,
MyCatPacket packet)
{
bool sqlServerMode = command.Connection.Settings.SqlServerMode;
if (packet == null)
{
packet = new MyCatPacket(Driver.Encoding);
packet.Version = Driver.Version;
packet.WriteByte(0);
}
MyCatTokenizer tokenizer = new MyCatTokenizer(sql);
tokenizer.ReturnComments = true;
tokenizer.SqlServerMode = sqlServerMode;
int pos = 0;
string token = tokenizer.NextToken();
int parameterCount = 0;
while (token != null)
{
// serialize everything that came before the token (i.e. whitespace)
packet.WriteStringNoNull(sql.Substring(pos, tokenizer.StartIndex - pos));
pos = tokenizer.StopIndex;
if (MyCatTokenizer.IsParameter(token))
{
if ((!parameters.containsUnnamedParameters && token.Length == 1 && parameterCount > 0) || parameters.containsUnnamedParameters && token.Length > 1)
{
throw new MyCatException(Resources.MixedParameterNamingNotAllowed);
}
parameters.containsUnnamedParameters = token.Length == 1;
if (SerializeParameter(parameters, packet, token, parameterCount))
{
token = null;
}
parameterCount++;
}
if (token != null)
{
if (sqlServerMode && tokenizer.Quoted && token.StartsWith("[", StringComparison.Ordinal))
{
token = String.Format("`{0}`", token.Substring(1, token.Length - 2));
}
packet.WriteStringNoNull(token);
}
token = tokenizer.NextToken();
}
buffers.Add(packet);
}
private string GetProcedureParameterLine(MyCatSchemaRow isRow)
{
string sql = "SHOW CREATE {0} `{1}`.`{2}`";
sql = String.Format(sql, isRow["ROUTINE_TYPE"], isRow["ROUTINE_SCHEMA"],
isRow["ROUTINE_NAME"]);
MyCatCommand cmd = new MyCatCommand(sql, connection);
using (MyCatDataReader reader = cmd.ExecuteReader())
{
reader.Read();
// if we are not the owner of this proc or have permissions
// then we will get null for the body
if (reader.IsDBNull(2))
{
return(null);
}
string sql_mode = reader.GetString(1);
string body = reader.GetString(2);
MyCatTokenizer tokenizer = new MyCatTokenizer(body);
tokenizer.AnsiQuotes = sql_mode.IndexOf("ANSI_QUOTES") != -1;
tokenizer.BackslashEscapes = sql_mode.IndexOf("NO_BACKSLASH_ESCAPES") == -1;
string token = tokenizer.NextToken();
while (token != "(")
{
token = tokenizer.NextToken();
}
int start = tokenizer.StartIndex + 1;
token = tokenizer.NextToken();
while (token != ")" || tokenizer.Quoted)
{
token = tokenizer.NextToken();
// if we see another ( and we are not quoted then we
// are in a size element and we need to look for the closing paren
if (token == "(" && !tokenizer.Quoted)
{
while (token != ")" || tokenizer.Quoted)
{
token = tokenizer.NextToken();
}
token = tokenizer.NextToken();
}
}
return(body.Substring(start, tokenizer.StartIndex - start));
}
}
private static List <string> ParseColumns(MyCatTokenizer tokenizer)
{
List <string> sc = new List <string>();
string token = tokenizer.NextToken();
while (token != ")")
{
if (token != ",")
{
sc.Add(token);
}
token = tokenizer.NextToken();
}
return(sc);
}
private void AdjustDelimiterEnd(MyCatTokenizer tokenizer)
{
if (tokenizer.StopIndex < query.Length)
{
int pos = tokenizer.StopIndex;
char c = query[pos];
while (!Char.IsWhiteSpace(c) && pos < (query.Length - 1))
{
c = query[++pos];
}
tokenizer.StopIndex = pos;
tokenizer.Position = pos;
}
}
private static List <string> GetPossibleValues(MyCatSchemaRow row)
{
string[] types = new string[] { "ENUM", "SET" };
string dtdIdentifier = row["DTD_IDENTIFIER"].ToString().Trim();
int index = 0;
for (; index < 2; index++)
{
if (dtdIdentifier.StartsWith(types[index], StringComparison.OrdinalIgnoreCase))
{
break;
}
}
if (index == 2)
{
return(null);
}
dtdIdentifier = dtdIdentifier.Substring(types[index].Length).Trim();
dtdIdentifier = dtdIdentifier.Trim('(', ')').Trim();
List <string> values = new List <string>();
MyCatTokenizer tokenzier = new MyCatTokenizer(dtdIdentifier);
string token = tokenzier.NextToken();
int start = tokenzier.StartIndex;
while (true)
{
if (token == null || token == ",")
{
int end = dtdIdentifier.Length - 1;
if (token == ",")
{
end = tokenzier.StartIndex;
}
string value = dtdIdentifier.Substring(start, end - start).Trim('\'', '\"').Trim();
values.Add(value);
start = tokenzier.StopIndex;
}
if (token == null)
{
break;
}
token = tokenzier.NextToken();
}
return(values);
}
/// <summary>
/// GetForeignKeysOnTable retrieves the foreign keys on the given table.
/// Since MySQL supports foreign keys on versions prior to 5.0, we can't use
/// information schema. MySQL also does not include any type of SHOW command
/// for foreign keys so we have to resort to use SHOW CREATE TABLE and parsing
/// the output.
/// </summary>
/// <param name="fkTable">The table to store the key info in.</param>
/// <param name="tableToParse">The table to get the foeign key info for.</param>
/// <param name="filterName">Only get foreign keys that match this name.</param>
/// <param name="includeColumns">Should column information be included in the table.</param>
private void GetForeignKeysOnTable(MyCatSchemaCollection fkTable, MyCatSchemaRow tableToParse,
string filterName, bool includeColumns)
{
string sqlMode = GetSqlMode();
if (filterName != null)
{
filterName = StringUtility.ToLowerInvariant(filterName);
}
string sql = string.Format("SHOW CREATE TABLE `{0}`.`{1}`",
tableToParse["TABLE_SCHEMA"], tableToParse["TABLE_NAME"]);
string lowerBody = null, body = null;
MyCatCommand cmd = new MyCatCommand(sql, connection);
using (MyCatDataReader reader = cmd.ExecuteReader())
{
reader.Read();
body = reader.GetString(1);
lowerBody = StringUtility.ToLowerInvariant(body);
}
MyCatTokenizer tokenizer = new MyCatTokenizer(lowerBody);
tokenizer.AnsiQuotes = sqlMode.IndexOf("ANSI_QUOTES") != -1;
tokenizer.BackslashEscapes = sqlMode.IndexOf("NO_BACKSLASH_ESCAPES") != -1;
while (true)
{
string token = tokenizer.NextToken();
// look for a starting contraint
while (token != null && (token != "constraint" || tokenizer.Quoted))
{
token = tokenizer.NextToken();
}
if (token == null)
{
break;
}
ParseConstraint(fkTable, tableToParse, tokenizer, includeColumns);
}
}
internal string GetCommandTextForBatching()
{
if (batchableCommandText == null)
{
// if the command starts with insert and is "simple" enough, then
// we can use the multi-value form of insert
if (String.Compare(CommandText.Substring(0, 6), "INSERT", StringComparison.OrdinalIgnoreCase) == 0)
{
MyCatCommand cmd = new MyCatCommand("SELECT @@sql_mode", Connection);
string sql_mode = StringUtility.ToUpperInvariant(cmd.ExecuteScalar().ToString());
MyCatTokenizer tokenizer = new MyCatTokenizer(CommandText);
tokenizer.AnsiQuotes = sql_mode.IndexOf("ANSI_QUOTES") != -1;
tokenizer.BackslashEscapes = sql_mode.IndexOf("NO_BACKSLASH_ESCAPES") == -1;
string token = StringUtility.ToLowerInvariant(tokenizer.NextToken());
while (token != null)
{
if (StringUtility.ToUpperInvariant(token) == "VALUES" &&
!tokenizer.Quoted)
{
token = tokenizer.NextToken();
if (token != "(")
{
throw new Exception();
}
// find matching right paren, and ensure that parens
// are balanced.
int openParenCount = 1;
while (token != null)
{
batchableCommandText += token;
token = tokenizer.NextToken();
if (token == "(")
{
openParenCount++;
}
else if (token == ")")
{
openParenCount--;
}
if (openParenCount == 0)
{
break;
}
}
if (token != null)
{
batchableCommandText += token;
}
token = tokenizer.NextToken();
if (token != null && (token == "," ||
StringUtility.ToUpperInvariant(token) == "ON"))
{
batchableCommandText = null;
break;
}
}
token = tokenizer.NextToken();
}
}
// Otherwise use the command verbatim
else
{
batchableCommandText = CommandText;
}
}
return(batchableCommandText);
}
/// <summary>
/// Parses out the elements of a procedure parameter data type.
/// </summary>
private string ParseDataType(MyCatSchemaRow row, MyCatTokenizer tokenizer)
{
StringBuilder dtd = new StringBuilder(
StringUtility.ToUpperInvariant(tokenizer.NextToken()));
row["DATA_TYPE"] = dtd.ToString();
string type = row["DATA_TYPE"].ToString();
string token = tokenizer.NextToken();
if (token == "(")
{
token = tokenizer.ReadParenthesis();
dtd.AppendFormat(CultureInfo.InvariantCulture, "{0}", token);
if (type != "ENUM" && type != "SET")
{
ParseDataTypeSize(row, token);
}
token = tokenizer.NextToken();
}
else
{
dtd.Append(GetDataTypeDefaults(type, row));
}
while (token != ")" &&
token != "," &&
String.Compare(token, "begin", StringComparison.OrdinalIgnoreCase) != 0 &&
String.Compare(token, "return", StringComparison.OrdinalIgnoreCase) != 0)
{
if (String.Compare(token, "CHARACTER", StringComparison.OrdinalIgnoreCase) == 0 ||
String.Compare(token, "BINARY", StringComparison.OrdinalIgnoreCase) == 0)
{
} // we don't need to do anything with this
else if (String.Compare(token, "SET", StringComparison.OrdinalIgnoreCase) == 0 ||
String.Compare(token, "CHARSET", StringComparison.OrdinalIgnoreCase) == 0)
{
row["CHARACTER_SET_NAME"] = tokenizer.NextToken();
}
else if (String.Compare(token, "ASCII", StringComparison.OrdinalIgnoreCase) == 0)
{
row["CHARACTER_SET_NAME"] = "latin1";
}
else if (String.Compare(token, "UNICODE", StringComparison.OrdinalIgnoreCase) == 0)
{
row["CHARACTER_SET_NAME"] = "ucs2";
}
else if (String.Compare(token, "COLLATE", StringComparison.OrdinalIgnoreCase) == 0)
{
row["COLLATION_NAME"] = tokenizer.NextToken();
}
else
{
dtd.AppendFormat(CultureInfo.InvariantCulture, " {0}", token);
}
token = tokenizer.NextToken();
}
if (dtd.Length > 0)
{
row["DTD_IDENTIFIER"] = dtd.ToString();
}
// now default the collation if one wasn't given
if (string.IsNullOrEmpty(( string )row["COLLATION_NAME"]) &&
!string.IsNullOrEmpty(( string )row["CHARACTER_SET_NAME"]))
{
row["COLLATION_NAME"] = CharSetMap.GetDefaultCollation(
row["CHARACTER_SET_NAME"].ToString(), connection);
}
// now set the octet length
if (row["CHARACTER_MAXIMUM_LENGTH"] != null)
{
if (row["CHARACTER_SET_NAME"] == null)
{
row["CHARACTER_SET_NAME"] = "";
}
row["CHARACTER_OCTET_LENGTH"] =
CharSetMap.GetMaxLength(( string )row["CHARACTER_SET_NAME"], connection) *
(int)row["CHARACTER_MAXIMUM_LENGTH"];
}
return(token);
}
private void ParseProcedureBody(MyCatSchemaCollection parametersTable, string body,
MyCatSchemaRow row, string nameToRestrict)
{
List <string> modes = new List <string>(new string[3] {
"IN", "OUT", "INOUT"
});
string sqlMode = row["SQL_MODE"].ToString();
int pos = 1;
MyCatTokenizer tokenizer = new MyCatTokenizer(body);
tokenizer.AnsiQuotes = sqlMode.IndexOf("ANSI_QUOTES") != -1;
tokenizer.BackslashEscapes = sqlMode.IndexOf("NO_BACKSLASH_ESCAPES") == -1;
tokenizer.ReturnComments = false;
string token = tokenizer.NextToken();
// this block will scan for the opening paren while also determining
// if this routine is a function. If so, then we need to add a
// parameter row for the return parameter since it is ordinal position
// 0 and should appear first.
while (token != "(")
{
if (String.Compare(token, "FUNCTION", StringComparison.OrdinalIgnoreCase) == 0 &&
nameToRestrict == null)
{
parametersTable.AddRow();
InitParameterRow(row, parametersTable.Rows[0]);
}
token = tokenizer.NextToken();
}
token = tokenizer.NextToken(); // now move to the next token past the (
while (token != ")")
{
MyCatSchemaRow parmRow = parametersTable.NewRow();
InitParameterRow(row, parmRow);
parmRow["ORDINAL_POSITION"] = pos++;
// handle mode and name for the parameter
string mode = StringUtility.ToUpperInvariant(token);
if (!tokenizer.Quoted && modes.Contains(mode))
{
parmRow["PARAMETER_MODE"] = mode;
token = tokenizer.NextToken();
}
if (tokenizer.Quoted)
{
token = token.Substring(1, token.Length - 2);
}
parmRow["PARAMETER_NAME"] = token;
// now parse data type
token = ParseDataType(parmRow, tokenizer);
if (token == ",")
{
token = tokenizer.NextToken();
}
// now determine if we should include this row after all
// we need to parse it before this check so we are correctly
// positioned for the next parameter
if (nameToRestrict == null ||
String.Compare(parmRow["PARAMETER_NAME"].ToString(), nameToRestrict, StringComparison.OrdinalIgnoreCase) == 0)
{
parametersTable.Rows.Add(parmRow);
}
}
// now parse out the return parameter if there is one.
token = StringUtility.ToUpperInvariant(tokenizer.NextToken());
if (String.Compare(token, "RETURNS", StringComparison.OrdinalIgnoreCase) == 0)
{
MyCatSchemaRow parameterRow = parametersTable.Rows[0];
parameterRow["PARAMETER_NAME"] = "RETURN_VALUE";
ParseDataType(parameterRow, tokenizer);
}
}
private List <ScriptStatement> BreakIntoStatements(bool ansiQuotes, bool noBackslashEscapes)
{
string currentDelimiter = Delimiter;
int startPos = 0;
List <ScriptStatement> statements = new List <ScriptStatement>();
List <int> lineNumbers = BreakScriptIntoLines();
MyCatTokenizer tokenizer = new MyCatTokenizer(query);
tokenizer.AnsiQuotes = ansiQuotes;
tokenizer.BackslashEscapes = !noBackslashEscapes;
string token = tokenizer.NextToken();
while (token != null)
{
if (!tokenizer.Quoted)
{
if (token.ToLower() == "delimiter")
{
tokenizer.NextToken();
AdjustDelimiterEnd(tokenizer);
currentDelimiter = query.Substring(tokenizer.StartIndex,
tokenizer.StopIndex - tokenizer.StartIndex).Trim();
startPos = tokenizer.StopIndex;
}
else
{
// this handles the case where our tokenizer reads part of the
// delimiter
if (currentDelimiter.StartsWith(token, StringComparison.OrdinalIgnoreCase))
{
if ((tokenizer.StartIndex + currentDelimiter.Length) <= query.Length)
{
if (query.Substring(tokenizer.StartIndex, currentDelimiter.Length) == currentDelimiter)
{
token = currentDelimiter;
tokenizer.Position = tokenizer.StartIndex + currentDelimiter.Length;
tokenizer.StopIndex = tokenizer.Position;
}
}
}
int delimiterPos = token.IndexOf(currentDelimiter, StringComparison.OrdinalIgnoreCase);
if (delimiterPos != -1)
{
int endPos = tokenizer.StopIndex - token.Length + delimiterPos;
if (tokenizer.StopIndex == query.Length - 1)
{
endPos++;
}
string currentQuery = query.Substring(startPos, endPos - startPos);
ScriptStatement statement = new ScriptStatement();
statement.text = currentQuery.Trim();
statement.line = FindLineNumber(startPos, lineNumbers);
statement.position = startPos - lineNumbers[statement.line];
statements.Add(statement);
startPos = endPos + currentDelimiter.Length;
}
}
}
token = tokenizer.NextToken();
}
// now clean up the last statement
if (startPos < query.Length - 1)
{
string sqlLeftOver = query.Substring(startPos).Trim();
if (!String.IsNullOrEmpty(sqlLeftOver))
{
ScriptStatement statement = new ScriptStatement();
statement.text = sqlLeftOver;
statement.line = FindLineNumber(startPos, lineNumbers);
statement.position = startPos - lineNumbers[statement.line];
statements.Add(statement);
}
}
return(statements);
}
