In the parse tree, combine LIMIT and OFFSET into a single expression rooted
on a TK_LIMIT node, for a small code size reduction and performance increase, and a reduction in code complexity. FossilOrigin-Name: 3925facd942c9df663f9b29b1e6f94f6be14af8c2b99eb691bfc836b4c220826
This commit is contained in:
drh
parent
65efeaca83
commit
8c0833fb21
37
manifest
37
manifest
@ -1,5 +1,5 @@
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C Add\sthe\sability\sto\sread\sfrom\sread-only\sWAL-mode\sdatabase\sfiles\sas\slong\sas\nthe\s-wal\sand\s-shm\sfiles\sare\spresent\son\sdisk.
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D 2017-11-14T19:34:22.764
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C In\sthe\sparse\stree,\scombine\sLIMIT\sand\sOFFSET\sinto\sa\ssingle\sexpression\srooted\non\sa\sTK_LIMIT\snode,\sfor\sa\ssmall\scode\ssize\sreduction\sand\sperformance\sincrease,\nand\sa\sreduction\sin\scode\scomplexity.
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D 2017-11-14T23:48:23.099
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F Makefile.in b142eb20482922153ebc77b261cdfd0a560ed05a81e9f6d9a2b0e8192922a1d2
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F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
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F Makefile.msc a55372a22454e742ba7c8f6edf05b83213ec01125166ad7dcee0567e2f7fc81b
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@ -407,7 +407,7 @@ F sqlite3.1 fc7ad8990fc8409983309bb80de8c811a7506786
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F sqlite3.pc.in 48fed132e7cb71ab676105d2a4dc77127d8c1f3a
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F src/alter.c cf7a8af45cb0ace672f47a1b29ab24092a9e8cd8d945a9974e3b5d925f548594
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F src/analyze.c 0d0ccf7520a201d8747ea2f02c92c26e26f801bc161f714f27b9f7630dde0421
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F src/attach.c 07b706e336fd3cedbd855e1f8266d10e82fecae07daf86717b5760cd7784c584
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F src/attach.c 84c477e856b24c2b9a0983b438a707c0cf4d616cee7a425401d418e58afec24c
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F src/auth.c 6277d63837357549fe14e723490d6dc1a38768d71c795c5eb5c0f8a99f918f73
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F src/backup.c faf17e60b43233c214aae6a8179d24503a61e83b
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F src/bitvec.c 17ea48eff8ba979f1f5b04cc484c7bb2be632f33
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@ -422,17 +422,17 @@ F src/ctime.c ff1be3eed7bdd75aaca61ca8dc848f7c9f850ef2fb9cb56f2734e922a098f9c0
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F src/date.c 48f743d88bbe88f848532d333cca84f26e52a4f217e86f86be7fc1b919c33d74
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F src/dbpage.c 8db4c97f630e7d83f884ea75caf1ffd0988c160e9d530194d93721c80821e0f6
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F src/dbstat.c 7a4ba8518b6369ef3600c49cf9c918ad979acba610b2aebef1b656d649b96720
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F src/delete.c f97cc2a9a30b4119ec5ed0da4e41335060cbb8510a5f1a756be48c065cb824f0
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F src/expr.c 0016b95aed1df47ebc0eb7415bd621841d72dbffd3bfb62210e50e71d83b4691
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F src/delete.c e6a70fb58f6628f0ffc6d7221a6702c0d7b342c82520385b3996b364c22e0cb3
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F src/expr.c 5257a9157f22f048ddcce5cd494d39633e89c2a4769671311b3e7875d262f746
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F src/fault.c 460f3e55994363812d9d60844b2a6de88826e007
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F src/fkey.c 821f70b6c43ba4542ffb5fdf11d3ac5f79e4cbae4750ee3de379afbc5e1f7781
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F src/fkey.c d617daf66b5515e2b42c1405b2b4984c30ca50fb705ab164271a9bf66c69e331
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F src/func.c 0fb9a2d678d3c8aba89b46468b309cd7e8fa9806a369a30aa89024660845bb13
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F src/global.c ac3094f1dc59fbeb919aef7cc0cc827a8459d1fb1adb7972ef75bd9e0c10b75b
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F src/hash.c a12580e143f10301ed5166ea4964ae2853d3905a511d4e0c44497245c7ce1f7a
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F src/hash.h ab34c5c54a9e9de2e790b24349ba5aab3dbb4fd4
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F src/hwtime.h 747c1bbe9df21a92e9c50f3bbec1de841dc5e5da
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F src/in-operator.md 10cd8f4bcd225a32518407c2fb2484089112fd71
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F src/insert.c c7f333547211b8efbac8a72f71adad736b91e655d7bcdfacc737351ecf3c8df2
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F src/insert.c cb67cc56ef2ddd13e6944b2c0dd08a920bcd9503230adef8b9928d338097c722
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F src/legacy.c 134ab3e3fae00a0f67a5187981d6935b24b337bcf0f4b3e5c9fa5763da95bf4e
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F src/loadext.c 20865b183bb8a3723d59cf1efffc3c50217eb452c1021d077b908c94da26b0b2
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F src/main.c c1965ee8159cee5fba3f590cc4767515a690504455a03e4817b1accfe0ba95a5
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@ -459,7 +459,7 @@ F src/os_win.c 7f36120492e4a23c48d1dd685edf29ae459c6d555660c61f1323cea3e5a1191d
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F src/os_win.h 7b073010f1451abe501be30d12f6bc599824944a
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F src/pager.c 07cf850241667874fcce9d7d924c814305e499b26c804322e2261247b5921903
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F src/pager.h 581698f2177e8bd4008fe4760898ce20b6133d1df22139b9101b5155f900df7a
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F src/parse.y f5f02ef39444982af36545bd52ae2921fc4ba1bac24d9b11efd8ec1f52c5b4dc
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F src/parse.y d79001da275bfe344b409006b85e81e486a0f6afc3762fdf0944f000f4aa0111
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F src/pcache.c 7ae91a4557a43d77d449accbfdc68846e6516f8e2eda46e8bbe4536fb669b201
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F src/pcache.h 072f94d29281cffd99e46c1539849f248c4b56ae7684c1f36626797fee375170
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F src/pcache1.c 716975564c15eb6679e97f734cec1bfd6c16ac3d4010f05f1f8e509fc7d19880
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@ -468,14 +468,14 @@ F src/pragma.h bb83728944b42f6d409c77f5838a8edbdb0fe83046c5496ffc9602b40340a324
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F src/prepare.c 7cf451f903ad92a14e22de415a13e7a7d30f1bd23b3d21eeb0dc7264723244c5
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F src/printf.c 9506b4b96e59c0467047155f09015750cb2878aeda3d39e5610c1192ddc3c41c
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F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384
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F src/resolve.c 5b1e89ba279f4a4ab2f0975a7100d75be71e1a43a2df75a9c909d45bdd18c6ed
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F src/resolve.c bbee7e31d369a18a2f4836644769882e9c5d40ef4a3af911db06410b65cb3730
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F src/rowset.c 7b7e7e479212e65b723bf40128c7b36dc5afdfac
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F src/select.c 660ef7977841fb462f24c8561e4212615bb6e5c9835fd3556257ce8316c50fee
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F src/select.c 17e220191860a64a18c084141e1a8b7309e166a6f2d42c02021af27ea080d157
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F src/shell.c.in 08cbffc31900359fea85896342a46147e9772c370d8a5079b7be26e3a1f50e8a
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F src/sqlite.h.in 8fd97993d48b50b9bade38c52f12d175942c9497c960905610c7b03a3e4b5818
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F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
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F src/sqlite3ext.h c02d628cca67f3889c689d82d25c3eb45e2c155db08e4c6089b5840d64687d34
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F src/sqliteInt.h abd4e64bc72906449d801d0e211265525239bc021bd9b7a72143c281fc24fa03
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F src/sqliteInt.h fb297e4b891608057e857d583e30a261d905a3f41493f351fc91bae7d22008ff
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F src/sqliteLimit.h 1513bfb7b20378aa0041e7022d04acb73525de35b80b252f1b83fedb4de6a76b
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F src/status.c 9737ed017279a9e0c5da748701c3c7bf1e8ae0dae459aad20dd64fcff97a7e35
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F src/table.c b46ad567748f24a326d9de40e5b9659f96ffff34
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@ -533,9 +533,9 @@ F src/test_windirent.h 5d67483a55442e31e1bde0f4a230e6e932ad5906
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F src/test_wsd.c 41cadfd9d97fe8e3e4e44f61a4a8ccd6f7ca8fe9
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F src/threads.c 4ae07fa022a3dc7c5beb373cf744a85d3c5c6c3c
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F src/tokenize.c 1003d6d90c6783206c711f0a9397656fa5b055209f4d092caa43bb3bf5215db5
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F src/treeview.c 2ee4a5dada213d5ab08a742af5c876cee6f1aaae65f10a61923f3fb63846afef
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F src/trigger.c 929b12bb5f9ab3b10c589f71fa176effe6ea8bddc9eb1bbd2439755fa0acdfdf
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F src/update.c 2e7ef3839eb620e9140a41bbfd05e29d7d216441c5d97221b75635dea4e49672
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F src/treeview.c 08a83195de8fad3f00542e3c8b3c1eb1222c999817c9e301ffb7f332882b96dd
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F src/trigger.c fc6be2a6e103d9e38b161e07d7db0ffb1f2218bd2f27ccdc0a3d1cc89e9cea0f
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F src/update.c 961bd1265d4d1e5cd65c9a54fa5122fb7aefcb003fcf2de0c092fceb7e58972c
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F src/utf.c 810fbfebe12359f10bc2a011520a6e10879ab2a163bcb26c74768eab82ea62a5
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F src/util.c d01fa6f45bfad3b65fb2490513aa2e0676412c61b4b094340b513cf72c3704a4
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F src/vacuum.c 90839322fd5f00df9617eb21b68beda9b6e2a2937576b0d65985e4aeb1c53739
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@ -552,7 +552,7 @@ F src/vtab.c 0e4885495172e1bdf54b12cce23b395ac74ef5729031f15e1bc1e3e6b360ed1a
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F src/vxworks.h d2988f4e5a61a4dfe82c6524dd3d6e4f2ce3cdb9
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F src/wal.c beeb71e4eab65dbf0d95f2717efc6ca3c0f5b3090ce67f3de63828f39a6ff053
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F src/wal.h 8de5d2d3de0956d6f6cb48c83a4012d5f227b8fe940f3a349a4b7e85ebcb492a
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F src/walker.c d591e8a9ccf60abb010966b354fcea4aa08eba4d83675c2b281a8764c76cc22f
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F src/walker.c da987a20d40145c0a03c07d8fefcb2ed363becc7680d0500d9c79915591f5b1f
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F src/where.c 031a80bcafe93934fd7052f3031c9e7eb36b61754c6c84d6bf0833184abad3db
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F src/whereInt.h 82c04c5075308abbac59180c8bad5ecb45b07453981f60a53f3c7dee21e1e971
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F src/wherecode.c 4a117dd5886616d074f7b6589c23bf742f5a9858d6ffdaf8b9d1f76ab06245d2
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@ -1677,8 +1677,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
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F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
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F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
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F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
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P dae4a97a483bee1e6ac0271ddd28a0dffcebf7522edaf12eb5e0eba5fc62516a 486949fc03706e0056439b52ce60931ea4ce0a65e391da7f6287fe13862de251
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R 4dd08ae7170c8d270fe307a98bb5bfb2
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T +closed 486949fc03706e0056439b52ce60931ea4ce0a65e391da7f6287fe13862de251
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P 00ec95fcd02bb415dabd7f25fee24856d45d6916c18b2728e97e9bb9b8322ba3
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R 9fe4e3d4453a36374c8a196662e2c5b0
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U drh
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Z 1fe131254421255cb83ffd7abf325441
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Z 3ab594fe26a5b432ce6d9e25b1b1040f
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@ -1 +1 @@
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00ec95fcd02bb415dabd7f25fee24856d45d6916c18b2728e97e9bb9b8322ba3
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3925facd942c9df663f9b29b1e6f94f6be14af8c2b99eb691bfc836b4c220826
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@ -504,9 +504,6 @@ int sqlite3FixSelect(
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if( sqlite3FixExpr(pFix, pSelect->pLimit) ){
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return 1;
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}
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if( sqlite3FixExpr(pFix, pSelect->pOffset) ){
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return 1;
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}
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pSelect = pSelect->pPrior;
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}
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return 0;
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22
src/delete.c
22
src/delete.c
@ -92,7 +92,6 @@ void sqlite3MaterializeView(
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Expr *pWhere, /* Optional WHERE clause to be added */
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ExprList *pOrderBy, /* Optional ORDER BY clause */
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Expr *pLimit, /* Optional LIMIT clause */
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Expr *pOffset, /* Optional OFFSET clause */
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int iCur /* Cursor number for ephemeral table */
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){
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SelectDest dest;
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@ -110,7 +109,7 @@ void sqlite3MaterializeView(
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assert( pFrom->a[0].pUsing==0 );
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}
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pSel = sqlite3SelectNew(pParse, 0, pFrom, pWhere, 0, 0, pOrderBy,
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SF_IncludeHidden, pLimit, pOffset);
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SF_IncludeHidden, pLimit);
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sqlite3SelectDestInit(&dest, SRT_EphemTab, iCur);
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sqlite3Select(pParse, pSel, &dest);
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sqlite3SelectDelete(db, pSel);
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@ -132,7 +131,6 @@ Expr *sqlite3LimitWhere(
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Expr *pWhere, /* The WHERE clause. May be null */
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ExprList *pOrderBy, /* The ORDER BY clause. May be null */
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Expr *pLimit, /* The LIMIT clause. May be null */
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Expr *pOffset, /* The OFFSET clause. May be null */
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char *zStmtType /* Either DELETE or UPDATE. For err msgs. */
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){
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sqlite3 *db = pParse->db;
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@ -149,8 +147,6 @@ Expr *sqlite3LimitWhere(
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sqlite3ErrorMsg(pParse, "ORDER BY without LIMIT on %s", zStmtType);
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sqlite3ExprDelete(pParse->db, pWhere);
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sqlite3ExprListDelete(pParse->db, pOrderBy);
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sqlite3ExprDelete(pParse->db, pLimit);
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sqlite3ExprDelete(pParse->db, pOffset);
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return 0;
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}
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@ -158,8 +154,6 @@ Expr *sqlite3LimitWhere(
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** is a limit/offset term to enforce.
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*/
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if( pLimit == 0 ) {
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/* if pLimit is null, pOffset will always be null as well. */
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assert( pOffset == 0 );
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return pWhere;
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}
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@ -206,7 +200,7 @@ Expr *sqlite3LimitWhere(
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/* generate the SELECT expression tree. */
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pSelect = sqlite3SelectNew(pParse, pEList, pSelectSrc, pWhere, 0 ,0,
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pOrderBy,0,pLimit,pOffset
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pOrderBy,0,pLimit
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);
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/* now generate the new WHERE rowid IN clause for the DELETE/UDPATE */
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@ -229,8 +223,7 @@ void sqlite3DeleteFrom(
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SrcList *pTabList, /* The table from which we should delete things */
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Expr *pWhere, /* The WHERE clause. May be null */
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ExprList *pOrderBy, /* ORDER BY clause. May be null */
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Expr *pLimit, /* LIMIT clause. May be null */
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Expr *pOffset /* OFFSET clause. May be null */
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Expr *pLimit /* LIMIT clause. May be null */
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){
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Vdbe *v; /* The virtual database engine */
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Table *pTab; /* The table from which records will be deleted */
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@ -303,10 +296,10 @@ void sqlite3DeleteFrom(
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#ifdef SQLITE_ENABLE_UPDATE_DELETE_LIMIT
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if( !isView ){
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pWhere = sqlite3LimitWhere(
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pParse, pTabList, pWhere, pOrderBy, pLimit, pOffset, "DELETE"
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pParse, pTabList, pWhere, pOrderBy, pLimit, "DELETE"
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);
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pOrderBy = 0;
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pLimit = pOffset = 0;
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pLimit = 0;
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}
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#endif
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@ -358,11 +351,11 @@ void sqlite3DeleteFrom(
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#if !defined(SQLITE_OMIT_VIEW) && !defined(SQLITE_OMIT_TRIGGER)
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if( isView ){
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sqlite3MaterializeView(pParse, pTab,
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pWhere, pOrderBy, pLimit, pOffset, iTabCur
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pWhere, pOrderBy, pLimit, iTabCur
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);
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iDataCur = iIdxCur = iTabCur;
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pOrderBy = 0;
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pLimit = pOffset = 0;
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pLimit = 0;
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}
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#endif
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@ -609,7 +602,6 @@ delete_from_cleanup:
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#if defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT)
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sqlite3ExprListDelete(db, pOrderBy);
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sqlite3ExprDelete(db, pLimit);
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sqlite3ExprDelete(db, pOffset);
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#endif
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sqlite3DbFree(db, aToOpen);
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return;
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14
src/expr.c
14
src/expr.c
@ -663,7 +663,6 @@ static void heightOfSelect(Select *p, int *pnHeight){
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heightOfExpr(p->pWhere, pnHeight);
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heightOfExpr(p->pHaving, pnHeight);
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heightOfExpr(p->pLimit, pnHeight);
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heightOfExpr(p->pOffset, pnHeight);
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heightOfExprList(p->pEList, pnHeight);
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heightOfExprList(p->pGroupBy, pnHeight);
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heightOfExprList(p->pOrderBy, pnHeight);
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@ -1462,7 +1461,6 @@ Select *sqlite3SelectDup(sqlite3 *db, Select *pDup, int flags){
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pNew->pNext = pNext;
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pNew->pPrior = 0;
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pNew->pLimit = sqlite3ExprDup(db, p->pLimit, flags);
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pNew->pOffset = sqlite3ExprDup(db, p->pOffset, flags);
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pNew->iLimit = 0;
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pNew->iOffset = 0;
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pNew->selFlags = p->selFlags & ~SF_UsesEphemeral;
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@ -2099,7 +2097,6 @@ static Select *isCandidateForInOpt(Expr *pX){
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}
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assert( p->pGroupBy==0 ); /* Has no GROUP BY clause */
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if( p->pLimit ) return 0; /* Has no LIMIT clause */
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assert( p->pOffset==0 ); /* No LIMIT means no OFFSET */
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if( p->pWhere ) return 0; /* Has no WHERE clause */
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pSrc = p->pSrc;
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assert( pSrc!=0 );
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@ -2739,6 +2736,7 @@ int sqlite3CodeSubselect(
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Select *pSel; /* SELECT statement to encode */
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SelectDest dest; /* How to deal with SELECT result */
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int nReg; /* Registers to allocate */
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Expr *pLimit; /* New limit expression */
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testcase( pExpr->op==TK_EXISTS );
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testcase( pExpr->op==TK_SELECT );
|
||||
@ -2760,9 +2758,13 @@ int sqlite3CodeSubselect(
|
||||
sqlite3VdbeAddOp2(v, OP_Integer, 0, dest.iSDParm);
|
||||
VdbeComment((v, "Init EXISTS result"));
|
||||
}
|
||||
sqlite3ExprDelete(pParse->db, pSel->pLimit);
|
||||
pSel->pLimit = sqlite3ExprAlloc(pParse->db, TK_INTEGER,
|
||||
&sqlite3IntTokens[1], 0);
|
||||
pLimit = sqlite3ExprAlloc(pParse->db, TK_INTEGER,&sqlite3IntTokens[1], 0);
|
||||
if( pSel->pLimit ){
|
||||
sqlite3ExprDelete(pParse->db, pSel->pLimit->pLeft);
|
||||
pSel->pLimit->pLeft = pLimit;
|
||||
}else{
|
||||
pSel->pLimit = sqlite3PExpr(pParse, TK_LIMIT, pLimit, 0);
|
||||
}
|
||||
pSel->iLimit = 0;
|
||||
pSel->selFlags &= ~SF_MultiValue;
|
||||
if( sqlite3Select(pParse, pSel, &dest) ){
|
||||
|
||||
@ -725,7 +725,7 @@ void sqlite3FkDropTable(Parse *pParse, SrcList *pName, Table *pTab){
|
||||
}
|
||||
|
||||
pParse->disableTriggers = 1;
|
||||
sqlite3DeleteFrom(pParse, sqlite3SrcListDup(db, pName, 0), 0, 0, 0, 0);
|
||||
sqlite3DeleteFrom(pParse, sqlite3SrcListDup(db, pName, 0), 0, 0, 0);
|
||||
pParse->disableTriggers = 0;
|
||||
|
||||
/* If the DELETE has generated immediate foreign key constraint
|
||||
@ -1283,7 +1283,7 @@ static Trigger *fkActionTrigger(
|
||||
sqlite3ExprListAppend(pParse, 0, pRaise),
|
||||
sqlite3SrcListAppend(db, 0, &tFrom, 0),
|
||||
pWhere,
|
||||
0, 0, 0, 0, 0, 0
|
||||
0, 0, 0, 0, 0
|
||||
);
|
||||
pWhere = 0;
|
||||
}
|
||||
|
||||
@ -2007,7 +2007,6 @@ static int xferOptimization(
|
||||
if( pSelect->pLimit ){
|
||||
return 0; /* SELECT may not have a LIMIT clause */
|
||||
}
|
||||
assert( pSelect->pOffset==0 ); /* Must be so if pLimit==0 */
|
||||
if( pSelect->pPrior ){
|
||||
return 0; /* SELECT may not be a compound query */
|
||||
}
|
||||
|
||||
45
src/parse.y
45
src/parse.y
@ -84,15 +84,6 @@
|
||||
*/
|
||||
#define YYMALLOCARGTYPE u64
|
||||
|
||||
/*
|
||||
** An instance of this structure holds information about the
|
||||
** LIMIT clause of a SELECT statement.
|
||||
*/
|
||||
struct LimitVal {
|
||||
Expr *pLimit; /* The LIMIT expression. NULL if there is no limit */
|
||||
Expr *pOffset; /* The OFFSET expression. NULL if there is none */
|
||||
};
|
||||
|
||||
/*
|
||||
** An instance of the following structure describes the event of a
|
||||
** TRIGGER. "a" is the event type, one of TK_UPDATE, TK_INSERT,
|
||||
@ -470,7 +461,7 @@ selectnowith(A) ::= selectnowith(A) multiselect_op(Y) oneselect(Z). {
|
||||
x.n = 0;
|
||||
parserDoubleLinkSelect(pParse, pRhs);
|
||||
pFrom = sqlite3SrcListAppendFromTerm(pParse,0,0,0,&x,pRhs,0,0);
|
||||
pRhs = sqlite3SelectNew(pParse,0,pFrom,0,0,0,0,0,0,0);
|
||||
pRhs = sqlite3SelectNew(pParse,0,pFrom,0,0,0,0,0,0);
|
||||
}
|
||||
if( pRhs ){
|
||||
pRhs->op = (u8)Y;
|
||||
@ -493,7 +484,7 @@ oneselect(A) ::= SELECT(S) distinct(D) selcollist(W) from(X) where_opt(Y)
|
||||
#if SELECTTRACE_ENABLED
|
||||
Token s = S; /*A-overwrites-S*/
|
||||
#endif
|
||||
A = sqlite3SelectNew(pParse,W,X,Y,P,Q,Z,D,L.pLimit,L.pOffset);
|
||||
A = sqlite3SelectNew(pParse,W,X,Y,P,Q,Z,D,L);
|
||||
#if SELECTTRACE_ENABLED
|
||||
/* Populate the Select.zSelName[] string that is used to help with
|
||||
** query planner debugging, to differentiate between multiple Select
|
||||
@ -524,11 +515,11 @@ oneselect(A) ::= values(A).
|
||||
%type values {Select*}
|
||||
%destructor values {sqlite3SelectDelete(pParse->db, $$);}
|
||||
values(A) ::= VALUES LP nexprlist(X) RP. {
|
||||
A = sqlite3SelectNew(pParse,X,0,0,0,0,0,SF_Values,0,0);
|
||||
A = sqlite3SelectNew(pParse,X,0,0,0,0,0,SF_Values,0);
|
||||
}
|
||||
values(A) ::= values(A) COMMA LP exprlist(Y) RP. {
|
||||
Select *pRight, *pLeft = A;
|
||||
pRight = sqlite3SelectNew(pParse,Y,0,0,0,0,0,SF_Values|SF_MultiValue,0,0);
|
||||
pRight = sqlite3SelectNew(pParse,Y,0,0,0,0,0,SF_Values|SF_MultiValue,0);
|
||||
if( ALWAYS(pLeft) ) pLeft->selFlags &= ~SF_MultiValue;
|
||||
if( pRight ){
|
||||
pRight->op = TK_ALL;
|
||||
@ -639,7 +630,7 @@ seltablist(A) ::= stl_prefix(A) nm(Y) dbnm(D) LP exprlist(E) RP as(Z)
|
||||
}else{
|
||||
Select *pSubquery;
|
||||
sqlite3SrcListShiftJoinType(F);
|
||||
pSubquery = sqlite3SelectNew(pParse,0,F,0,0,0,0,SF_NestedFrom,0,0);
|
||||
pSubquery = sqlite3SelectNew(pParse,0,F,0,0,0,0,SF_NestedFrom,0);
|
||||
A = sqlite3SrcListAppendFromTerm(pParse,A,0,0,&Z,pSubquery,N,U);
|
||||
}
|
||||
}
|
||||
@ -726,7 +717,7 @@ groupby_opt(A) ::= GROUP BY nexprlist(X). {A = X;}
|
||||
having_opt(A) ::= . {A = 0;}
|
||||
having_opt(A) ::= HAVING expr(X). {A = X.pExpr;}
|
||||
|
||||
%type limit_opt {struct LimitVal}
|
||||
%type limit_opt {Expr*}
|
||||
|
||||
// The destructor for limit_opt will never fire in the current grammar.
|
||||
// The limit_opt non-terminal only occurs at the end of a single production
|
||||
@ -735,16 +726,14 @@ having_opt(A) ::= HAVING expr(X). {A = X.pExpr;}
|
||||
// reduce. So there is never a limit_opt non-terminal on the stack
|
||||
// except as a transient. So there is never anything to destroy.
|
||||
//
|
||||
//%destructor limit_opt {
|
||||
// sqlite3ExprDelete(pParse->db, $$.pLimit);
|
||||
// sqlite3ExprDelete(pParse->db, $$.pOffset);
|
||||
//}
|
||||
limit_opt(A) ::= . {A.pLimit = 0; A.pOffset = 0;}
|
||||
limit_opt(A) ::= LIMIT expr(X). {A.pLimit = X.pExpr; A.pOffset = 0;}
|
||||
//%destructor limit_opt {sqlite3ExprDelete(pParse->db, $$);}
|
||||
limit_opt(A) ::= . {A = 0;}
|
||||
limit_opt(A) ::= LIMIT expr(X).
|
||||
{A = sqlite3PExpr(pParse,TK_LIMIT,X.pExpr,0);}
|
||||
limit_opt(A) ::= LIMIT expr(X) OFFSET expr(Y).
|
||||
{A.pLimit = X.pExpr; A.pOffset = Y.pExpr;}
|
||||
{A = sqlite3PExpr(pParse,TK_LIMIT,X.pExpr,Y.pExpr);}
|
||||
limit_opt(A) ::= LIMIT expr(X) COMMA expr(Y).
|
||||
{A.pOffset = X.pExpr; A.pLimit = Y.pExpr;}
|
||||
{A = sqlite3PExpr(pParse,TK_LIMIT,Y.pExpr,X.pExpr);}
|
||||
|
||||
/////////////////////////// The DELETE statement /////////////////////////////
|
||||
//
|
||||
@ -753,14 +742,14 @@ cmd ::= with(C) DELETE FROM fullname(X) indexed_opt(I) where_opt(W)
|
||||
orderby_opt(O) limit_opt(L). {
|
||||
sqlite3WithPush(pParse, C, 1);
|
||||
sqlite3SrcListIndexedBy(pParse, X, &I);
|
||||
sqlite3DeleteFrom(pParse,X,W,O,L.pLimit,L.pOffset);
|
||||
sqlite3DeleteFrom(pParse,X,W,O,L);
|
||||
}
|
||||
%endif
|
||||
%ifndef SQLITE_ENABLE_UPDATE_DELETE_LIMIT
|
||||
cmd ::= with(C) DELETE FROM fullname(X) indexed_opt(I) where_opt(W). {
|
||||
sqlite3WithPush(pParse, C, 1);
|
||||
sqlite3SrcListIndexedBy(pParse, X, &I);
|
||||
sqlite3DeleteFrom(pParse,X,W,0,0,0);
|
||||
sqlite3DeleteFrom(pParse,X,W,0,0);
|
||||
}
|
||||
%endif
|
||||
|
||||
@ -778,7 +767,7 @@ cmd ::= with(C) UPDATE orconf(R) fullname(X) indexed_opt(I) SET setlist(Y)
|
||||
sqlite3WithPush(pParse, C, 1);
|
||||
sqlite3SrcListIndexedBy(pParse, X, &I);
|
||||
sqlite3ExprListCheckLength(pParse,Y,"set list");
|
||||
sqlite3Update(pParse,X,Y,W,R,O,L.pLimit,L.pOffset);
|
||||
sqlite3Update(pParse,X,Y,W,R,O,L);
|
||||
}
|
||||
%endif
|
||||
%ifndef SQLITE_ENABLE_UPDATE_DELETE_LIMIT
|
||||
@ -787,7 +776,7 @@ cmd ::= with(C) UPDATE orconf(R) fullname(X) indexed_opt(I) SET setlist(Y)
|
||||
sqlite3WithPush(pParse, C, 1);
|
||||
sqlite3SrcListIndexedBy(pParse, X, &I);
|
||||
sqlite3ExprListCheckLength(pParse,Y,"set list");
|
||||
sqlite3Update(pParse,X,Y,W,R,0,0,0);
|
||||
sqlite3Update(pParse,X,Y,W,R,0,0);
|
||||
}
|
||||
%endif
|
||||
|
||||
@ -1189,7 +1178,7 @@ expr(A) ::= expr(A) between_op(N) expr(X) AND expr(Y). [BETWEEN] {
|
||||
}
|
||||
expr(A) ::= expr(A) in_op(N) nm(Y) dbnm(Z) paren_exprlist(E). [IN] {
|
||||
SrcList *pSrc = sqlite3SrcListAppend(pParse->db, 0,&Y,&Z);
|
||||
Select *pSelect = sqlite3SelectNew(pParse, 0,pSrc,0,0,0,0,0,0,0);
|
||||
Select *pSelect = sqlite3SelectNew(pParse, 0,pSrc,0,0,0,0,0,0);
|
||||
if( E ) sqlite3SrcListFuncArgs(pParse, pSelect ? pSrc : 0, E);
|
||||
A.pExpr = sqlite3PExpr(pParse, TK_IN, A.pExpr, 0);
|
||||
sqlite3PExprAddSelect(pParse, A.pExpr, pSelect);
|
||||
|
||||
@ -1196,8 +1196,7 @@ static int resolveSelectStep(Walker *pWalker, Select *p){
|
||||
*/
|
||||
memset(&sNC, 0, sizeof(sNC));
|
||||
sNC.pParse = pParse;
|
||||
if( sqlite3ResolveExprNames(&sNC, p->pLimit) ||
|
||||
sqlite3ResolveExprNames(&sNC, p->pOffset) ){
|
||||
if( sqlite3ResolveExprNames(&sNC, p->pLimit) ){
|
||||
return WRC_Abort;
|
||||
}
|
||||
|
||||
|
||||
60
src/select.c
60
src/select.c
@ -74,7 +74,6 @@ static void clearSelect(sqlite3 *db, Select *p, int bFree){
|
||||
sqlite3ExprDelete(db, p->pHaving);
|
||||
sqlite3ExprListDelete(db, p->pOrderBy);
|
||||
sqlite3ExprDelete(db, p->pLimit);
|
||||
sqlite3ExprDelete(db, p->pOffset);
|
||||
if( OK_IF_ALWAYS_TRUE(p->pWith) ) sqlite3WithDelete(db, p->pWith);
|
||||
if( bFree ) sqlite3DbFreeNN(db, p);
|
||||
p = pPrior;
|
||||
@ -107,8 +106,7 @@ Select *sqlite3SelectNew(
|
||||
Expr *pHaving, /* the HAVING clause */
|
||||
ExprList *pOrderBy, /* the ORDER BY clause */
|
||||
u32 selFlags, /* Flag parameters, such as SF_Distinct */
|
||||
Expr *pLimit, /* LIMIT value. NULL means not used */
|
||||
Expr *pOffset /* OFFSET value. NULL means no offset */
|
||||
Expr *pLimit /* LIMIT value. NULL means not used */
|
||||
){
|
||||
Select *pNew;
|
||||
Select standin;
|
||||
@ -141,10 +139,7 @@ Select *sqlite3SelectNew(
|
||||
pNew->pPrior = 0;
|
||||
pNew->pNext = 0;
|
||||
pNew->pLimit = pLimit;
|
||||
pNew->pOffset = pOffset;
|
||||
pNew->pWith = 0;
|
||||
assert( pOffset==0 || pLimit!=0 || pParse->nErr>0
|
||||
|| pParse->db->mallocFailed!=0 );
|
||||
if( pParse->db->mallocFailed ) {
|
||||
clearSelect(pParse->db, pNew, pNew!=&standin);
|
||||
pNew = 0;
|
||||
@ -1874,7 +1869,7 @@ Vdbe *sqlite3GetVdbe(Parse *pParse){
|
||||
|
||||
/*
|
||||
** Compute the iLimit and iOffset fields of the SELECT based on the
|
||||
** pLimit and pOffset expressions. pLimit and pOffset hold the expressions
|
||||
** pLimit expressions. pLimit->pLeft and pLimit->pRight hold the expressions
|
||||
** that appear in the original SQL statement after the LIMIT and OFFSET
|
||||
** keywords. Or NULL if those keywords are omitted. iLimit and iOffset
|
||||
** are the integer memory register numbers for counters used to compute
|
||||
@ -1882,15 +1877,15 @@ Vdbe *sqlite3GetVdbe(Parse *pParse){
|
||||
** iLimit and iOffset are negative.
|
||||
**
|
||||
** This routine changes the values of iLimit and iOffset only if
|
||||
** a limit or offset is defined by pLimit and pOffset. iLimit and
|
||||
** iOffset should have been preset to appropriate default values (zero)
|
||||
** a limit or offset is defined by pLimit->pLeft and pLimit->pRight. iLimit
|
||||
** and iOffset should have been preset to appropriate default values (zero)
|
||||
** prior to calling this routine.
|
||||
**
|
||||
** The iOffset register (if it exists) is initialized to the value
|
||||
** of the OFFSET. The iLimit register is initialized to LIMIT. Register
|
||||
** iOffset+1 is initialized to LIMIT+OFFSET.
|
||||
**
|
||||
** Only if pLimit!=0 or pOffset!=0 do the limit registers get
|
||||
** Only if pLimit->pLeft!=0 do the limit registers get
|
||||
** redefined. The UNION ALL operator uses this property to force
|
||||
** the reuse of the same limit and offset registers across multiple
|
||||
** SELECT statements.
|
||||
@ -1900,6 +1895,8 @@ static void computeLimitRegisters(Parse *pParse, Select *p, int iBreak){
|
||||
int iLimit = 0;
|
||||
int iOffset;
|
||||
int n;
|
||||
Expr *pLimit = p->pLimit;
|
||||
|
||||
if( p->iLimit ) return;
|
||||
|
||||
/*
|
||||
@ -1909,12 +1906,13 @@ static void computeLimitRegisters(Parse *pParse, Select *p, int iBreak){
|
||||
** no rows.
|
||||
*/
|
||||
sqlite3ExprCacheClear(pParse);
|
||||
assert( p->pOffset==0 || p->pLimit!=0 );
|
||||
if( p->pLimit ){
|
||||
if( pLimit ){
|
||||
assert( pLimit->op==TK_LIMIT );
|
||||
assert( pLimit->pLeft!=0 );
|
||||
p->iLimit = iLimit = ++pParse->nMem;
|
||||
v = sqlite3GetVdbe(pParse);
|
||||
assert( v!=0 );
|
||||
if( sqlite3ExprIsInteger(p->pLimit, &n) ){
|
||||
if( sqlite3ExprIsInteger(pLimit->pLeft, &n) ){
|
||||
sqlite3VdbeAddOp2(v, OP_Integer, n, iLimit);
|
||||
VdbeComment((v, "LIMIT counter"));
|
||||
if( n==0 ){
|
||||
@ -1924,15 +1922,15 @@ static void computeLimitRegisters(Parse *pParse, Select *p, int iBreak){
|
||||
p->selFlags |= SF_FixedLimit;
|
||||
}
|
||||
}else{
|
||||
sqlite3ExprCode(pParse, p->pLimit, iLimit);
|
||||
sqlite3ExprCode(pParse, pLimit->pLeft, iLimit);
|
||||
sqlite3VdbeAddOp1(v, OP_MustBeInt, iLimit); VdbeCoverage(v);
|
||||
VdbeComment((v, "LIMIT counter"));
|
||||
sqlite3VdbeAddOp2(v, OP_IfNot, iLimit, iBreak); VdbeCoverage(v);
|
||||
}
|
||||
if( p->pOffset ){
|
||||
if( pLimit->pRight ){
|
||||
p->iOffset = iOffset = ++pParse->nMem;
|
||||
pParse->nMem++; /* Allocate an extra register for limit+offset */
|
||||
sqlite3ExprCode(pParse, p->pOffset, iOffset);
|
||||
sqlite3ExprCode(pParse, pLimit->pRight, iOffset);
|
||||
sqlite3VdbeAddOp1(v, OP_MustBeInt, iOffset); VdbeCoverage(v);
|
||||
VdbeComment((v, "OFFSET counter"));
|
||||
sqlite3VdbeAddOp3(v, OP_OffsetLimit, iLimit, iOffset+1, iOffset);
|
||||
@ -2062,7 +2060,7 @@ static void generateWithRecursiveQuery(
|
||||
int i; /* Loop counter */
|
||||
int rc; /* Result code */
|
||||
ExprList *pOrderBy; /* The ORDER BY clause */
|
||||
Expr *pLimit, *pOffset; /* Saved LIMIT and OFFSET */
|
||||
Expr *pLimit; /* Saved LIMIT and OFFSET */
|
||||
int regLimit, regOffset; /* Registers used by LIMIT and OFFSET */
|
||||
|
||||
/* Obtain authorization to do a recursive query */
|
||||
@ -2073,10 +2071,9 @@ static void generateWithRecursiveQuery(
|
||||
p->nSelectRow = 320; /* 4 billion rows */
|
||||
computeLimitRegisters(pParse, p, addrBreak);
|
||||
pLimit = p->pLimit;
|
||||
pOffset = p->pOffset;
|
||||
regLimit = p->iLimit;
|
||||
regOffset = p->iOffset;
|
||||
p->pLimit = p->pOffset = 0;
|
||||
p->pLimit = 0;
|
||||
p->iLimit = p->iOffset = 0;
|
||||
pOrderBy = p->pOrderBy;
|
||||
|
||||
@ -2169,7 +2166,6 @@ end_of_recursive_query:
|
||||
sqlite3ExprListDelete(pParse->db, p->pOrderBy);
|
||||
p->pOrderBy = pOrderBy;
|
||||
p->pLimit = pLimit;
|
||||
p->pOffset = pOffset;
|
||||
return;
|
||||
}
|
||||
#endif /* SQLITE_OMIT_CTE */
|
||||
@ -2205,7 +2201,6 @@ static int multiSelectValues(
|
||||
assert( p->selFlags & SF_Values );
|
||||
assert( p->op==TK_ALL || (p->op==TK_SELECT && p->pPrior==0) );
|
||||
assert( p->pLimit==0 );
|
||||
assert( p->pOffset==0 );
|
||||
assert( p->pNext==0 || p->pEList->nExpr==p->pNext->pEList->nExpr );
|
||||
if( p->pPrior==0 ) break;
|
||||
assert( p->pPrior->pNext==p );
|
||||
@ -2332,11 +2327,9 @@ static int multiSelect(
|
||||
pPrior->iLimit = p->iLimit;
|
||||
pPrior->iOffset = p->iOffset;
|
||||
pPrior->pLimit = p->pLimit;
|
||||
pPrior->pOffset = p->pOffset;
|
||||
explainSetInteger(iSub1, pParse->iNextSelectId);
|
||||
rc = sqlite3Select(pParse, pPrior, &dest);
|
||||
p->pLimit = 0;
|
||||
p->pOffset = 0;
|
||||
if( rc ){
|
||||
goto multi_select_end;
|
||||
}
|
||||
@ -2358,7 +2351,7 @@ static int multiSelect(
|
||||
p->pPrior = pPrior;
|
||||
p->nSelectRow = sqlite3LogEstAdd(p->nSelectRow, pPrior->nSelectRow);
|
||||
if( pPrior->pLimit
|
||||
&& sqlite3ExprIsInteger(pPrior->pLimit, &nLimit)
|
||||
&& sqlite3ExprIsInteger(pPrior->pLimit->pLeft, &nLimit)
|
||||
&& nLimit>0 && p->nSelectRow > sqlite3LogEst((u64)nLimit)
|
||||
){
|
||||
p->nSelectRow = sqlite3LogEst((u64)nLimit);
|
||||
@ -2373,7 +2366,7 @@ static int multiSelect(
|
||||
int unionTab; /* Cursor number of the temporary table holding result */
|
||||
u8 op = 0; /* One of the SRT_ operations to apply to self */
|
||||
int priorOp; /* The SRT_ operation to apply to prior selects */
|
||||
Expr *pLimit, *pOffset; /* Saved values of p->nLimit and p->nOffset */
|
||||
Expr *pLimit; /* Saved values of p->nLimit */
|
||||
int addr;
|
||||
SelectDest uniondest;
|
||||
|
||||
@ -2385,7 +2378,6 @@ static int multiSelect(
|
||||
** right.
|
||||
*/
|
||||
assert( p->pLimit==0 ); /* Not allowed on leftward elements */
|
||||
assert( p->pOffset==0 ); /* Not allowed on leftward elements */
|
||||
unionTab = dest.iSDParm;
|
||||
}else{
|
||||
/* We will need to create our own temporary table to hold the
|
||||
@ -2421,8 +2413,6 @@ static int multiSelect(
|
||||
p->pPrior = 0;
|
||||
pLimit = p->pLimit;
|
||||
p->pLimit = 0;
|
||||
pOffset = p->pOffset;
|
||||
p->pOffset = 0;
|
||||
uniondest.eDest = op;
|
||||
explainSetInteger(iSub2, pParse->iNextSelectId);
|
||||
rc = sqlite3Select(pParse, p, &uniondest);
|
||||
@ -2438,7 +2428,6 @@ static int multiSelect(
|
||||
}
|
||||
sqlite3ExprDelete(db, p->pLimit);
|
||||
p->pLimit = pLimit;
|
||||
p->pOffset = pOffset;
|
||||
p->iLimit = 0;
|
||||
p->iOffset = 0;
|
||||
|
||||
@ -2466,7 +2455,7 @@ static int multiSelect(
|
||||
default: assert( p->op==TK_INTERSECT ); {
|
||||
int tab1, tab2;
|
||||
int iCont, iBreak, iStart;
|
||||
Expr *pLimit, *pOffset;
|
||||
Expr *pLimit;
|
||||
int addr;
|
||||
SelectDest intersectdest;
|
||||
int r1;
|
||||
@ -2502,8 +2491,6 @@ static int multiSelect(
|
||||
p->pPrior = 0;
|
||||
pLimit = p->pLimit;
|
||||
p->pLimit = 0;
|
||||
pOffset = p->pOffset;
|
||||
p->pOffset = 0;
|
||||
intersectdest.iSDParm = tab2;
|
||||
explainSetInteger(iSub2, pParse->iNextSelectId);
|
||||
rc = sqlite3Select(pParse, p, &intersectdest);
|
||||
@ -2513,7 +2500,6 @@ static int multiSelect(
|
||||
if( p->nSelectRow>pPrior->nSelectRow ) p->nSelectRow = pPrior->nSelectRow;
|
||||
sqlite3ExprDelete(db, p->pLimit);
|
||||
p->pLimit = pLimit;
|
||||
p->pOffset = pOffset;
|
||||
|
||||
/* Generate code to take the intersection of the two temporary
|
||||
** tables.
|
||||
@ -2992,8 +2978,6 @@ static int multiSelectOrderBy(
|
||||
}
|
||||
sqlite3ExprDelete(db, p->pLimit);
|
||||
p->pLimit = 0;
|
||||
sqlite3ExprDelete(db, p->pOffset);
|
||||
p->pOffset = 0;
|
||||
|
||||
regAddrA = ++pParse->nMem;
|
||||
regAddrB = ++pParse->nMem;
|
||||
@ -3457,7 +3441,7 @@ static int flattenSubquery(
|
||||
** became arbitrary expressions, we were forced to add restrictions (13)
|
||||
** and (14). */
|
||||
if( pSub->pLimit && p->pLimit ) return 0; /* Restriction (13) */
|
||||
if( pSub->pOffset ) return 0; /* Restriction (14) */
|
||||
if( pSub->pLimit && pSub->pLimit->pRight ) return 0; /* Restriction (14) */
|
||||
if( (p->selFlags & SF_Compound)!=0 && pSub->pLimit ){
|
||||
return 0; /* Restriction (15) */
|
||||
}
|
||||
@ -3605,16 +3589,13 @@ static int flattenSubquery(
|
||||
Select *pNew;
|
||||
ExprList *pOrderBy = p->pOrderBy;
|
||||
Expr *pLimit = p->pLimit;
|
||||
Expr *pOffset = p->pOffset;
|
||||
Select *pPrior = p->pPrior;
|
||||
p->pOrderBy = 0;
|
||||
p->pSrc = 0;
|
||||
p->pPrior = 0;
|
||||
p->pLimit = 0;
|
||||
p->pOffset = 0;
|
||||
pNew = sqlite3SelectDup(db, p, 0);
|
||||
sqlite3SelectSetName(pNew, pSub->zSelName);
|
||||
p->pOffset = pOffset;
|
||||
p->pLimit = pLimit;
|
||||
p->pOrderBy = pOrderBy;
|
||||
p->pSrc = pSrc;
|
||||
@ -4080,7 +4061,6 @@ static int convertCompoundSelectToSubquery(Walker *pWalker, Select *p){
|
||||
assert( pNew->pPrior!=0 );
|
||||
pNew->pPrior->pNext = pNew;
|
||||
pNew->pLimit = 0;
|
||||
pNew->pOffset = 0;
|
||||
return WRC_Continue;
|
||||
}
|
||||
|
||||
|
||||
@ -2749,7 +2749,6 @@ struct Select {
|
||||
Select *pPrior; /* Prior select in a compound select statement */
|
||||
Select *pNext; /* Next select to the left in a compound */
|
||||
Expr *pLimit; /* LIMIT expression. NULL means not used. */
|
||||
Expr *pOffset; /* OFFSET expression. NULL means not used. */
|
||||
With *pWith; /* WITH clause attached to this select. Or NULL. */
|
||||
};
|
||||
|
||||
@ -3756,16 +3755,16 @@ void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*,
|
||||
void sqlite3DropIndex(Parse*, SrcList*, int);
|
||||
int sqlite3Select(Parse*, Select*, SelectDest*);
|
||||
Select *sqlite3SelectNew(Parse*,ExprList*,SrcList*,Expr*,ExprList*,
|
||||
Expr*,ExprList*,u32,Expr*,Expr*);
|
||||
Expr*,ExprList*,u32,Expr*);
|
||||
void sqlite3SelectDelete(sqlite3*, Select*);
|
||||
Table *sqlite3SrcListLookup(Parse*, SrcList*);
|
||||
int sqlite3IsReadOnly(Parse*, Table*, int);
|
||||
void sqlite3OpenTable(Parse*, int iCur, int iDb, Table*, int);
|
||||
#if defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT) && !defined(SQLITE_OMIT_SUBQUERY)
|
||||
Expr *sqlite3LimitWhere(Parse*,SrcList*,Expr*,ExprList*,Expr*,Expr*,char*);
|
||||
Expr *sqlite3LimitWhere(Parse*,SrcList*,Expr*,ExprList*,Expr*,char*);
|
||||
#endif
|
||||
void sqlite3DeleteFrom(Parse*, SrcList*, Expr*, ExprList*, Expr*, Expr*);
|
||||
void sqlite3Update(Parse*, SrcList*, ExprList*,Expr*,int,ExprList*,Expr*,Expr*);
|
||||
void sqlite3DeleteFrom(Parse*, SrcList*, Expr*, ExprList*, Expr*);
|
||||
void sqlite3Update(Parse*, SrcList*, ExprList*,Expr*,int,ExprList*,Expr*);
|
||||
WhereInfo *sqlite3WhereBegin(Parse*,SrcList*,Expr*,ExprList*,ExprList*,u16,int);
|
||||
void sqlite3WhereEnd(WhereInfo*);
|
||||
LogEst sqlite3WhereOutputRowCount(WhereInfo*);
|
||||
@ -3889,7 +3888,7 @@ int sqlite3SafetyCheckSickOrOk(sqlite3*);
|
||||
void sqlite3ChangeCookie(Parse*, int);
|
||||
|
||||
#if !defined(SQLITE_OMIT_VIEW) && !defined(SQLITE_OMIT_TRIGGER)
|
||||
void sqlite3MaterializeView(Parse*, Table*, Expr*, ExprList*,Expr*,Expr*,int);
|
||||
void sqlite3MaterializeView(Parse*, Table*, Expr*, ExprList*,Expr*,int);
|
||||
#endif
|
||||
|
||||
#ifndef SQLITE_OMIT_TRIGGER
|
||||
|
||||
@ -153,7 +153,6 @@ void sqlite3TreeViewSelect(TreeView *pView, const Select *p, u8 moreToFollow){
|
||||
if( p->pHaving ) n++;
|
||||
if( p->pOrderBy ) n++;
|
||||
if( p->pLimit ) n++;
|
||||
if( p->pOffset ) n++;
|
||||
}
|
||||
sqlite3TreeViewExprList(pView, p->pEList, (n--)>0, "result-set");
|
||||
if( p->pSrc && p->pSrc->nSrc ){
|
||||
@ -210,12 +209,12 @@ void sqlite3TreeViewSelect(TreeView *pView, const Select *p, u8 moreToFollow){
|
||||
}
|
||||
if( p->pLimit ){
|
||||
sqlite3TreeViewItem(pView, "LIMIT", (n--)>0);
|
||||
sqlite3TreeViewExpr(pView, p->pLimit, 0);
|
||||
sqlite3TreeViewExpr(pView, p->pLimit->pLeft, p->pLimit->pRight!=0);
|
||||
if( p->pLimit->pRight ){
|
||||
sqlite3TreeViewItem(pView, "OFFSET", (n--)>0);
|
||||
sqlite3TreeViewExpr(pView, p->pLimit->pRight, 0);
|
||||
sqlite3TreeViewPop(pView);
|
||||
}
|
||||
if( p->pOffset ){
|
||||
sqlite3TreeViewItem(pView, "OFFSET", (n--)>0);
|
||||
sqlite3TreeViewExpr(pView, p->pOffset, 0);
|
||||
sqlite3TreeViewPop(pView);
|
||||
}
|
||||
if( p->pPrior ){
|
||||
|
||||
@ -711,7 +711,7 @@ static int codeTriggerProgram(
|
||||
targetSrcList(pParse, pStep),
|
||||
sqlite3ExprListDup(db, pStep->pExprList, 0),
|
||||
sqlite3ExprDup(db, pStep->pWhere, 0),
|
||||
pParse->eOrconf, 0, 0, 0
|
||||
pParse->eOrconf, 0, 0
|
||||
);
|
||||
break;
|
||||
}
|
||||
@ -727,7 +727,7 @@ static int codeTriggerProgram(
|
||||
case TK_DELETE: {
|
||||
sqlite3DeleteFrom(pParse,
|
||||
targetSrcList(pParse, pStep),
|
||||
sqlite3ExprDup(db, pStep->pWhere, 0), 0, 0, 0
|
||||
sqlite3ExprDup(db, pStep->pWhere, 0), 0, 0
|
||||
);
|
||||
break;
|
||||
}
|
||||
|
||||
12
src/update.c
12
src/update.c
@ -93,8 +93,7 @@ void sqlite3Update(
|
||||
Expr *pWhere, /* The WHERE clause. May be null */
|
||||
int onError, /* How to handle constraint errors */
|
||||
ExprList *pOrderBy, /* ORDER BY clause. May be null */
|
||||
Expr *pLimit, /* LIMIT clause. May be null */
|
||||
Expr *pOffset /* OFFSET clause. May be null */
|
||||
Expr *pLimit /* LIMIT clause. May be null */
|
||||
){
|
||||
int i, j; /* Loop counters */
|
||||
Table *pTab; /* The table to be updated */
|
||||
@ -182,10 +181,10 @@ void sqlite3Update(
|
||||
#ifdef SQLITE_ENABLE_UPDATE_DELETE_LIMIT
|
||||
if( !isView ){
|
||||
pWhere = sqlite3LimitWhere(
|
||||
pParse, pTabList, pWhere, pOrderBy, pLimit, pOffset, "UPDATE"
|
||||
pParse, pTabList, pWhere, pOrderBy, pLimit, "UPDATE"
|
||||
);
|
||||
pOrderBy = 0;
|
||||
pLimit = pOffset = 0;
|
||||
pLimit = 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
@ -358,10 +357,10 @@ void sqlite3Update(
|
||||
#if !defined(SQLITE_OMIT_VIEW) && !defined(SQLITE_OMIT_TRIGGER)
|
||||
if( isView ){
|
||||
sqlite3MaterializeView(pParse, pTab,
|
||||
pWhere, pOrderBy, pLimit, pOffset, iDataCur
|
||||
pWhere, pOrderBy, pLimit, iDataCur
|
||||
);
|
||||
pOrderBy = 0;
|
||||
pLimit = pOffset = 0;
|
||||
pLimit = 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
@ -748,7 +747,6 @@ update_cleanup:
|
||||
#if defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT)
|
||||
sqlite3ExprListDelete(db, pOrderBy);
|
||||
sqlite3ExprDelete(db, pLimit);
|
||||
sqlite3ExprDelete(db, pOffset);
|
||||
#endif
|
||||
return;
|
||||
}
|
||||
|
||||
@ -91,7 +91,6 @@ int sqlite3WalkSelectExpr(Walker *pWalker, Select *p){
|
||||
if( sqlite3WalkExpr(pWalker, p->pHaving) ) return WRC_Abort;
|
||||
if( sqlite3WalkExprList(pWalker, p->pOrderBy) ) return WRC_Abort;
|
||||
if( sqlite3WalkExpr(pWalker, p->pLimit) ) return WRC_Abort;
|
||||
if( sqlite3WalkExpr(pWalker, p->pOffset) ) return WRC_Abort;
|
||||
return WRC_Continue;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user