1 | |
package liquibase.change.core; |
2 | |
|
3 | |
import liquibase.change.AbstractChange; |
4 | |
import liquibase.change.ChangeMetaData; |
5 | |
import liquibase.change.ColumnConfig; |
6 | |
import liquibase.database.Database; |
7 | |
import liquibase.database.core.DB2Database; |
8 | |
import liquibase.database.core.SQLiteDatabase; |
9 | |
import liquibase.database.core.SQLiteDatabase.AlterTableVisitor; |
10 | |
import liquibase.database.structure.Index; |
11 | |
import liquibase.statement.SqlStatement; |
12 | |
import liquibase.statement.core.DropColumnStatement; |
13 | |
import liquibase.statement.core.ReorganizeTableStatement; |
14 | |
import liquibase.util.StringUtils; |
15 | |
|
16 | |
import java.util.ArrayList; |
17 | |
import java.util.List; |
18 | |
|
19 | |
|
20 | |
|
21 | |
|
22 | |
public class DropColumnChange extends AbstractChange { |
23 | |
|
24 | |
private String schemaName; |
25 | |
private String tableName; |
26 | |
private String columnName; |
27 | |
|
28 | |
public DropColumnChange() { |
29 | 63 | super("dropColumn", "Drop Column", ChangeMetaData.PRIORITY_DEFAULT); |
30 | 63 | } |
31 | |
|
32 | |
public String getColumnName() { |
33 | 92 | return columnName; |
34 | |
} |
35 | |
|
36 | |
public void setColumnName(String columnName) { |
37 | 49 | this.columnName = columnName; |
38 | 49 | } |
39 | |
|
40 | |
public String getSchemaName() { |
41 | 47 | return schemaName; |
42 | |
} |
43 | |
|
44 | |
public void setSchemaName(String schemaName) { |
45 | 47 | this.schemaName = StringUtils.trimToNull(schemaName); |
46 | 47 | } |
47 | |
|
48 | |
public String getTableName() { |
49 | 65 | return tableName; |
50 | |
} |
51 | |
|
52 | |
public void setTableName(String tableName) { |
53 | 49 | this.tableName = tableName; |
54 | 49 | } |
55 | |
|
56 | |
public SqlStatement[] generateStatements(Database database) { |
57 | |
|
58 | |
|
59 | |
|
60 | |
|
61 | |
|
62 | |
|
63 | 46 | List<SqlStatement> statements = new ArrayList<SqlStatement>(); |
64 | 46 | String schemaName = getSchemaName() == null ? database.getDefaultSchemaName() : getSchemaName(); |
65 | |
|
66 | 46 | statements.add(new DropColumnStatement(schemaName, getTableName(), getColumnName())); |
67 | 46 | if (database instanceof DB2Database) { |
68 | 3 | statements.add(new ReorganizeTableStatement(schemaName, getTableName())); |
69 | |
} |
70 | |
|
71 | 46 | return statements.toArray(new SqlStatement[statements.size()]); |
72 | |
} |
73 | |
|
74 | |
private SqlStatement[] generateStatementsForSQLiteDatabase(Database database) { |
75 | |
|
76 | |
|
77 | |
|
78 | |
|
79 | |
|
80 | 0 | List<SqlStatement> statements = new ArrayList<SqlStatement>(); |
81 | |
|
82 | |
|
83 | 0 | AlterTableVisitor rename_alter_visitor = new AlterTableVisitor() { |
84 | |
public ColumnConfig[] getColumnsToAdd() { |
85 | 0 | return new ColumnConfig[0]; |
86 | |
} |
87 | |
|
88 | |
public boolean createThisColumn(ColumnConfig column) { |
89 | 0 | return !column.getName().equals(getColumnName()); |
90 | |
} |
91 | |
|
92 | |
public boolean copyThisColumn(ColumnConfig column) { |
93 | 0 | return !column.getName().equals(getColumnName()); |
94 | |
} |
95 | |
|
96 | |
public boolean createThisIndex(Index index) { |
97 | 0 | return !index.getColumns().contains(getColumnName()); |
98 | |
} |
99 | |
}; |
100 | |
|
101 | |
try { |
102 | |
|
103 | 0 | statements.addAll(SQLiteDatabase.getAlterTableStatements(rename_alter_visitor, database, getSchemaName(), |
104 | |
getTableName())); |
105 | |
|
106 | 0 | } catch (Exception e) { |
107 | 0 | e.printStackTrace(); |
108 | 0 | } |
109 | |
|
110 | 0 | return statements.toArray(new SqlStatement[statements.size()]); |
111 | |
} |
112 | |
|
113 | |
public String getConfirmationMessage() { |
114 | 1 | return "Column " + getTableName() + "." + getColumnName() + " dropped"; |
115 | |
} |
116 | |
} |