This is the plan used for my query in my prod database.
10.2.0.3
In dev same oracle version, the plan is not doing bitmap conversion.
prod query time: 4minutes
dev query time:20 seconds

how can i tell oracle to stop bitmap conversing on me?

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| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
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| 0 | SELECT STATEMENT | | 1934 | 267K| 3025 (1)| 00:00:37 |
| 1 | SORT ORDER BY | | 1934 | 267K| 3024 (25)| 00:00:37 |
| 2 | UNION-ALL | | | | | |
| 3 | MAT_VIEW ACCESS BY INDEX ROWID | MV_SONG | 92 | 14076 | 2304 (1)| 00:00:28 |
| 4 | BITMAP CONVERSION TO ROWIDS | | | | | |
| 5 | BITMAP AND | | | | | |
| 6 | BITMAP CONVERSION FROM ROWIDS| | | | | |
|* 7 | INDEX RANGE SCAN | IDX_MV_SONG_USCFALB | | | 417 (2)| 00:00:06 |
| 8 | BITMAP CONVERSION FROM ROWIDS| | | | | |
| 9 | SORT ORDER BY | | | | | |
|* 10 | DOMAIN INDEX | MV_SON_TITLE_FULLT_IDX | | | 1827 (0)| 00:00:22 |
| 11 | MAT_VIEW ACCESS BY INDEX ROWID | MV_SONG | 1842 | 253K| 720 (1)| 00:00:09 |
|* 12 | INDEX RANGE SCAN | IDXF_MV_SONG_SONTUSFALB | 737 | | 3 (0)| 00:00:01 |
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