5 // Copyright (c) 2007-2008 Jiri Moudry, Pascal Craponne
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7 // Permission is hereby granted, free of charge, to any person obtaining a copy
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8 // of this software and associated documentation files (the "Software"), to deal
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9 // in the Software without restriction, including without limitation the rights
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10 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 // copies of the Software, and to permit persons to whom the Software is
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12 // furnished to do so, subject to the following conditions:
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14 // The above copyright notice and this permission notice shall be included in
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15 // all copies or substantial portions of the Software.
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17 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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27 using System.Collections.Generic;
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31 namespace DbLinq.MySql
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33 partial class MySqlSchemaLoader
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36 /// represents one row from MySQL's information_schema.`Key_Column_Usage` table
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38 protected class DataConstraint
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40 public string ConstraintName;
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41 public string TableSchema;
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42 public string TableName;
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43 public string ColumnName;
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44 public string ReferencedTableSchema;
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45 public string ReferencedTableName;
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46 public string ReferencedColumnName;
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48 public override string ToString()
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50 string detail = ConstraintName == "PRIMARY"
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53 return "KeyColUsage " + detail;
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57 protected virtual DataConstraint ReadConstraint(IDataReader rdr)
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59 DataConstraint constraint = new DataConstraint();
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61 constraint.ConstraintName = rdr.GetAsString(field++);
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62 constraint.TableSchema = rdr.GetAsString(field++);
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63 constraint.TableName = rdr.GetAsString(field++);
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64 constraint.ColumnName = rdr.GetAsString(field++);
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65 constraint.ReferencedTableSchema = rdr.GetAsString(field++);
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66 constraint.ReferencedTableName = rdr.GetAsString(field++);
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67 constraint.ReferencedColumnName = rdr.GetAsString(field++);
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71 protected virtual List<DataConstraint> ReadConstraints(IDbConnection conn, string db)
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74 SELECT constraint_name,table_schema,table_name
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75 ,GROUP_CONCAT(column_name SEPARATOR ',') AS column_name,referenced_table_schema,referenced_table_name,GROUP_CONCAT(referenced_column_name SEPARATOR ',') AS referenced_column_name
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76 FROM information_schema.`KEY_COLUMN_USAGE`
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77 WHERE table_schema=?db GROUP BY constraint_name,table_schema,table_name,referenced_table_name";
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79 return DataCommand.Find<DataConstraint>(conn, sql, "?db", db, ReadConstraint);
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