private TableSchema ParseCreateTable(string sql)
{
var parser = new SimpleParser(sql);
var tableSchema = new TableSchema();
tableSchema.Columns = new List <ColumnSchema>();
parser.SkipOverString("create table");
tableSchema.TableName = parser.TakeWord();
parser.SkipOverString("(");
while (!parser.AtEnd() && !parser.Is(')'))
{
var column = new ColumnSchema();
tableSchema.Columns.Add(column);
column.ColumnName = parser.TakeWord();
column.DataType = parser.TakeWord();
var attributes = parser.TakeToAny(new[] { ',', ')' }).ToUpper();
if (attributes.Contains("PRIMARY KEY"))
{
column.Attributes = column.Attributes | ColumnAttributes.Primary;
}
if (attributes.Contains("NOT NULL"))
{
column.Attributes = column.Attributes | ColumnAttributes.NotNull;
}
if (attributes.Contains("UNIQUE"))
{
column.Attributes = column.Attributes | ColumnAttributes.Unique;
}
if (attributes.Contains("AUTOINCREMENT"))
{
column.Attributes = column.Attributes | ColumnAttributes.AutoIncrement;
}
if (string.Equals(column.DataType, "TEXT", StringComparison.OrdinalIgnoreCase) && !attributes.Contains("COLLATE NOCASE"))
{
column.Attributes = column.Attributes | ColumnAttributes.CaseSensitive;
}
}
return(tableSchema);
}
private IndexSchema ParseCreateIndex(string sql)
{
var parser = new SimpleParser(sql);
var indexSchema = new IndexSchema();
indexSchema.Attributes = IndexAttributes.CaseSensitive;
parser.SkipOverString("CREATE");
if (parser.TakeWord().ToUpper() == "UNIQUE")
{
indexSchema.Attributes = indexSchema.Attributes | IndexAttributes.Unique;
parser.SkipOverString("INDEX");
}
indexSchema.IndexName = parser.TakeWord();
if (indexSchema.IndexName.ToUpper() == "IF")
{
parser.SkipOverString("EXISTS");
indexSchema.IndexName = parser.TakeWord();
}
parser.SkipOverString("ON");
parser.TakeWord(); // table name
parser.SkipOverString("(");
var columnNames = new List <string>();
while (!parser.AtEnd() && !parser.Is(')'))
{
columnNames.Add(parser.TakeWord());
parser.SkipAny(' ');
var columnOptions = parser.TakeToAny(',', ')').ToUpper();
if (columnOptions.Contains("COLLATE NOCASE"))
{
indexSchema.Attributes = indexSchema.Attributes & ~IndexAttributes.CaseSensitive;
}
parser.Skip(1);
}
indexSchema.ColumnNames = columnNames.ToArray();
return(indexSchema);
}
