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Reserve minimum space for memo/ole fields so that greedy inline row usage does not cause spurious write failures for wide tables.
git-svn-id: https://svn.code.sf.net/p/jackcess/code/jackcess/trunk@358 f203690c-595d-4dc9-a70b-905162fa7fd2tags/rel_1_1_16
James Ahlborn
16 年之前
+ 6
- 0
src/changes/changes.xml
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| @@ -5,6 +5,12 @@ | |||
| <author email="jahlborn@users.sf.net">James Ahlborn</author> | |||
| </properties> | |||
| <body> | |||
| <release version="1.1.16" date="TBD"> | |||
| <action dev="jahlborn" type="fix" issue="2019244"> | |||
| Reserve minimum space for memo/ole fields so that greedy inline row | |||
| usage does not cause spurious write failures for wide tables. | |||
| </action> | |||
| </release> | |||
| <release version="1.1.15" date="2008-06-27"> | |||
| <action dev="jahlborn" type="fix" issue="1998225"> | |||
| Fix writing of large memo/ole fields. Apparently Access does not like | |||
+ 11
- 1
src/java/com/healthmarketscience/jackcess/Table.java
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| @@ -1374,7 +1374,17 @@ public class Table | |||
| maxRowSize -= buffer.position(); | |||
| // now, account for trailer space | |||
| maxRowSize -= (nullMask.byteSize() + 4 + (_maxVarColumnCount * 2)); | |||
| // for each non-null long value column we need to reserve a small | |||
| // amount of space so that we don't end up running out of row space | |||
| // later by being too greedy | |||
| for (Column varCol : _varColumns) { | |||
| if((varCol.getType().isLongValue()) && | |||
| (rowArray[varCol.getColumnIndex()] != null)) { | |||
| maxRowSize -= getFormat().SIZE_LONG_VALUE_DEF; | |||
| } | |||
| } | |||
| //Now write out variable length column data | |||
| short[] varColumnOffsets = new short[_maxVarColumnCount]; | |||
| int varColumnOffsetsIndex = 0; | |||
+ 26
- 0
test/src/java/com/healthmarketscience/jackcess/DatabaseTest.java
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| @@ -380,6 +380,32 @@ public class DatabaseTest extends TestCase { | |||
| } | |||
| public void testManyMemos() throws Exception { | |||
| final int numColumns = 126; | |||
| Database db = create(); | |||
| TableBuilder bigTableBuilder = new TableBuilder("myBigTable"); | |||
| for (int i = 0; i < numColumns; i++) | |||
| { | |||
| Column column = new ColumnBuilder("column_" + i, DataType.MEMO) | |||
| .toColumn(); | |||
| bigTableBuilder.addColumn(column); | |||
| } | |||
| Table bigTable = bigTableBuilder.toTable(db); | |||
| for (int j = 999; j < 1010; j++) | |||
| { | |||
| Object[] rowData = new String[numColumns]; | |||
| for (int i = 0; i < numColumns; i++) | |||
| { | |||
| rowData[i] = "v_" + i + ";" + j; | |||
| } | |||
| bigTable.addRow(rowData); | |||
| } | |||
| db.close(); | |||
| } | |||
| public void testMissingFile() throws Exception { | |||
| File bogusFile = new File("fooby-dooby.mdb"); | |||
| assertTrue(!bogusFile.exists()); | |||
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