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# MIT License |
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# |
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# Copyright (c) 2017 Matt Boyer |
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# |
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# Permission is hereby granted, free of charge, to any person obtaining a copy |
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# of this software and associated documentation files (the "Software"), to deal |
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# in the Software without restriction, including without limitation the rights |
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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# copies of the Software, and to permit persons to whom the Software is |
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# furnished to do so, subject to the following conditions: |
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# |
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# The above copyright notice and this permission notice shall be included in |
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# all copies or substantial portions of the Software. |
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# |
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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# SOFTWARE. |
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VALID_PAGE_SIZES = (1, 512, 1024, 2048, 4096, 8192, 16384, 32768) |
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SQLITE_TABLE_COLUMNS = { |
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'sqlite_master': ('type', 'name', 'tbl_name', 'rootpage', 'sql',), |
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'sqlite_sequence': ('name', 'seq',), |
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'sqlite_stat1': ('tbl', 'idx', 'stat',), |
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'sqlite_stat2': ('tbl', 'idx', 'sampleno', 'sample'), |
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'sqlite_stat3': ('tbl', 'idx', 'nEq', 'nLt', 'nDLt', 'sample'), |
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'sqlite_stat4': ('tbl', 'idx', 'nEq', 'nLt', 'nDLt', 'sample'), |
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} |
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# These are the integers used in ptrmap entries to designate the kind of page |
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# for which a given ptrmap entry holds a notional "child to parent" pointer |
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BTREE_ROOT_PAGE = 1 |
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FREELIST_PAGE = 2 |
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FIRST_OFLOW_PAGE = 3 |
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NON_FIRST_OFLOW_PAGE = 4 |
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BTREE_NONROOT_PAGE = 5 |
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PTRMAP_PAGE_TYPES = ( |
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BTREE_ROOT_PAGE, |
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FREELIST_PAGE, |
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FIRST_OFLOW_PAGE, |
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NON_FIRST_OFLOW_PAGE, |
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BTREE_NONROOT_PAGE, |
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) |
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OVERFLOW_PAGE_TYPES = ( |
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FIRST_OFLOW_PAGE, |
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NON_FIRST_OFLOW_PAGE, |
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) |
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# These are identifiers used internally to keep track of page types *before* |
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# specialised objects can be instantiated |
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FREELIST_TRUNK_PAGE = 'freelist_trunk' |
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FREELIST_LEAF_PAGE = 'freelist_leaf' |
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PTRMAP_PAGE = 'ptrmap_page' |
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UNKNOWN_PAGE = 'unknown' |
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FREELIST_PAGE_TYPES = ( |
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FREELIST_TRUNK_PAGE, |
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FREELIST_LEAF_PAGE, |
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) |
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NON_BTREE_PAGE_TYPES = ( |
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FREELIST_TRUNK_PAGE, |
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FIRST_OFLOW_PAGE, |
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NON_FIRST_OFLOW_PAGE, |
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PTRMAP_PAGE, |
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) |
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mattboyer /
sqbrite
