mirror of
https://github.com/sqlite/sqlite.git
synced 2024-11-29 00:12:23 +01:00
Initial implementation of the "sqlite_dbpage" virtual table. Currently
it is read-only and has a place-holder xBestIndex. FossilOrigin-Name: c2c1d656e3f52465192c2a697a976cd1837ccc4e10708a2377cff8bf6eaa7d49
This commit is contained in:
drh
parent
ff0a67a1a7
commit
a43c8c8a60
@ -166,7 +166,8 @@ USE_AMALGAMATION = @USE_AMALGAMATION@
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#
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LIBOBJS0 = alter.lo analyze.lo attach.lo auth.lo \
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backup.lo bitvec.lo btmutex.lo btree.lo build.lo \
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callback.lo complete.lo ctime.lo date.lo dbstat.lo delete.lo \
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callback.lo complete.lo ctime.lo \
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date.lo dbpage.lo dbstat.lo delete.lo \
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expr.lo fault.lo fkey.lo \
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fts3.lo fts3_aux.lo fts3_expr.lo fts3_hash.lo fts3_icu.lo \
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fts3_porter.lo fts3_snippet.lo fts3_tokenizer.lo fts3_tokenizer1.lo \
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@ -215,6 +216,7 @@ SRC = \
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$(TOP)/src/complete.c \
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$(TOP)/src/ctime.c \
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$(TOP)/src/date.c \
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$(TOP)/src/dbpage.c \
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$(TOP)/src/dbstat.c \
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$(TOP)/src/delete.c \
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$(TOP)/src/expr.c \
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@ -449,6 +451,7 @@ TESTSRC2 = \
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$(TOP)/src/build.c \
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$(TOP)/src/ctime.c \
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$(TOP)/src/date.c \
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$(TOP)/src/dbpage.c \
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$(TOP)/src/dbstat.c \
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$(TOP)/src/expr.c \
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$(TOP)/src/func.c \
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@ -752,6 +755,9 @@ ctime.lo: $(TOP)/src/ctime.c $(HDR)
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date.lo: $(TOP)/src/date.c $(HDR)
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$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/date.c
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dbpage.lo: $(TOP)/src/dbpage.c $(HDR)
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$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/dbpage.c
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dbstat.lo: $(TOP)/src/dbstat.c $(HDR)
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$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/dbstat.c
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@ -1091,7 +1091,8 @@ LTLIBS = $(LTLIBS) $(LIBICU)
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#
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LIBOBJS0 = vdbe.lo parse.lo alter.lo analyze.lo attach.lo auth.lo \
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backup.lo bitvec.lo btmutex.lo btree.lo build.lo \
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callback.lo complete.lo ctime.lo date.lo dbstat.lo delete.lo \
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callback.lo complete.lo ctime.lo \
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date.lo dbpage.lo dbstat.lo delete.lo \
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expr.lo fault.lo fkey.lo \
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fts3.lo fts3_aux.lo fts3_expr.lo fts3_hash.lo fts3_icu.lo \
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fts3_porter.lo fts3_snippet.lo fts3_tokenizer.lo fts3_tokenizer1.lo \
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@ -1154,6 +1155,7 @@ SRC00 = \
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$(TOP)\src\complete.c \
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$(TOP)\src\ctime.c \
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$(TOP)\src\date.c \
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$(TOP)\src\dbpage.c \
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$(TOP)\src\dbstat.c \
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$(TOP)\src\delete.c \
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$(TOP)\src\expr.c \
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@ -1747,7 +1749,10 @@ ctime.lo: $(TOP)\src\ctime.c $(HDR)
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date.lo: $(TOP)\src\date.c $(HDR)
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$(LTCOMPILE) $(CORE_COMPILE_OPTS) -c $(TOP)\src\date.c
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dbstat.lo: $(TOP)\src\date.c $(HDR)
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dbpage.lo: $(TOP)\src\dbpage.c $(HDR)
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$(LTCOMPILE) $(CORE_COMPILE_OPTS) -c $(TOP)\src\dbpage.c
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dbstat.lo: $(TOP)\src\dbstat.c $(HDR)
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$(LTCOMPILE) $(CORE_COMPILE_OPTS) -c $(TOP)\src\dbstat.c
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delete.lo: $(TOP)\src\delete.c $(HDR)
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5
main.mk
5
main.mk
@ -55,7 +55,8 @@ THREADLIB += $(LIBS)
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LIBOBJ+= vdbe.o parse.o \
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alter.o analyze.o attach.o auth.o \
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backup.o bitvec.o btmutex.o btree.o build.o \
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callback.o complete.o ctime.o date.o dbstat.o delete.o expr.o \
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callback.o complete.o ctime.o \
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date.o dbpage.o dbstat.o delete.o expr.o \
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fault.o fkey.o \
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fts3.o fts3_aux.o fts3_expr.o fts3_hash.o fts3_icu.o fts3_porter.o \
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fts3_snippet.o fts3_tokenizer.o fts3_tokenizer1.o \
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@ -96,6 +97,7 @@ SRC = \
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$(TOP)/src/complete.c \
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$(TOP)/src/ctime.c \
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$(TOP)/src/date.c \
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$(TOP)/src/dbpage.c \
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$(TOP)/src/dbstat.c \
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$(TOP)/src/delete.c \
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$(TOP)/src/expr.c \
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@ -359,6 +361,7 @@ TESTSRC2 = \
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$(TOP)/src/btree.c \
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$(TOP)/src/build.c \
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$(TOP)/src/date.c \
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$(TOP)/src/dbpage.c \
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$(TOP)/src/dbstat.c \
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$(TOP)/src/expr.c \
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$(TOP)/src/func.c \
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26
manifest
26
manifest
@ -1,8 +1,8 @@
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C In\sthe\sspeed-check.sh\stest\sscript,\sallow\san\sadditional\stest-name\sargument\nwhich\sbecomes\sthe\scomparison\sbaseline,\sin\splace\sof\s"trunk".
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D 2017-10-11T12:20:36.082
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F Makefile.in 4bc36d913c2e3e2d326d588d72f618ac9788b2fd4b7efda61102611a6495c3ff
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C Initial\simplementation\sof\sthe\s"sqlite_dbpage"\svirtual\stable.\s\sCurrently\nit\sis\sread-only\sand\shas\sa\splace-holder\sxBestIndex.
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D 2017-10-11T13:48:11.877
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F Makefile.in f7cba589198b8663d8a43f25ad001cf44fdac4fcd6216325f05775924a7af2f9
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F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
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F Makefile.msc 6033b51b6aea702ea059f6ab2d47b1d3cef648695f787247dd4fb395fe60673f
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F Makefile.msc 1224c8773fc7f89c57e83c7b452291d239aa2cff4af50a204c84129e295cc37d
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F README.md f5c87359573c4d255425e588a56554b50fdcc2afba4e017a2e02a43701456afd
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F VERSION f81232df28e2d3ff049feefad5fbd5489cc33697f6bd2ecf61af7f0dde3b83d0
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F aclocal.m4 a5c22d164aff7ed549d53a90fa56d56955281f50
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@ -382,7 +382,7 @@ F ext/userauth/userauth.c 3410be31283abba70255d71fd24734e017a4497f
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F install-sh 9d4de14ab9fb0facae2f48780b874848cbf2f895 x
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F ltmain.sh 3ff0879076df340d2e23ae905484d8c15d5fdea8
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F magic.txt 8273bf49ba3b0c8559cb2774495390c31fd61c60
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F main.mk d0145f02deb67d65c4822225847cba112c237cdb62f4905eeb4b648e82bfc222
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F main.mk 656d9f31fdc01290094460f00255a45fdf4bedd08839467857919fea628582cf
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F mkso.sh fd21c06b063bb16a5d25deea1752c2da6ac3ed83
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F mptest/config01.test 3c6adcbc50b991866855f1977ff172eb6d901271
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F mptest/config02.test 4415dfe36c48785f751e16e32c20b077c28ae504
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@ -409,6 +409,7 @@ F src/callback.c 28a8ede982fde4129b828350f78f2c01fe7d12c74d1a0a05d7108ab36f30868
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F src/complete.c a3634ab1e687055cd002e11b8f43eb75c17da23e
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F src/ctime.c ff1be3eed7bdd75aaca61ca8dc848f7c9f850ef2fb9cb56f2734e922a098f9c0
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F src/date.c 48f743d88bbe88f848532d333cca84f26e52a4f217e86f86be7fc1b919c33d74
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F src/dbpage.c f274a9b7bb680cc2952ee78883d67e133be0ef6065317813586a5f723af35ad5
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F src/dbstat.c 7a4ba8518b6369ef3600c49cf9c918ad979acba610b2aebef1b656d649b96720
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F src/delete.c 21a5f1812fdb599e9f7afb9f650bdabab60a3afd51d7e94e539c982f647b0023
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F src/expr.c 4d2d0aafd945424f638ee03e11330f03288ccf616e025498f3c8602d01609a0a
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@ -423,7 +424,7 @@ F src/in-operator.md 10cd8f4bcd225a32518407c2fb2484089112fd71
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F src/insert.c 1f33ef4ca0553b60fff03aa171370f8709a3e945acfcc68ccafc92752d872f40
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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 a4bdadaaa827e7380cba4de878ed7947dab5aeb84f617118ba6a0422cd745b4b
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F src/main.c 54637b9e7f91de6d281e577cd1a997762a4613f51a0509790027ca9865185d7c
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F src/malloc.c a02c9e69bc76bee0f639416b947a946412890b606301454727feadcb313536d6
|
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F src/mem0.c 6a55ebe57c46ca1a7d98da93aaa07f99f1059645
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F src/mem1.c c12a42539b1ba105e3707d0e628ad70e611040d8f5e38cf942cee30c867083de
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@ -464,7 +465,7 @@ F src/shell.c.in e03f7d473e10b65c25836a058a3e7a1665ffb1fe712949dcd6e38c790e4eafd
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F src/sqlite.h.in ab4f8a29d1580dfaeb6891fa1b83cff8229ba0daa56994707ceaca71495d9ab7
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F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
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F src/sqlite3ext.h a1fd3aa82f967da436164e0728a7d6841651fd0c6e27b9044e0eb9f6c8462e47
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F src/sqliteInt.h c07bc88eca1f59ce73e1f486187d0df4effe67c4579e112dfdd91c159e5c0569
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F src/sqliteInt.h 6f93fd6fde862410ac26b930f70752c38ad99ea78c3fc28356bac78049c53bd9
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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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@ -1597,7 +1598,7 @@ F tool/mkshellc.tcl 950c36f45941c12140e346a907fb66198bc2770ff7a17c749201e78d34bb
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F tool/mksourceid.c d458f9004c837bee87a6382228ac20d3eae3c49ea3b0a5aace936f8b60748d3b
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F tool/mkspeedsql.tcl a1a334d288f7adfe6e996f2e712becf076745c97
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F tool/mksqlite3c-noext.tcl fef88397668ae83166735c41af99d79f56afaabb
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F tool/mksqlite3c.tcl b258d679829a9305f5cf107b7d97b9bf23adb3773df42947fed5ef7b180dfbd9
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F tool/mksqlite3c.tcl 1fb69d39166f52d802a70ec37d99bca51d011c8ab30be27bc495be493196ae41
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F tool/mksqlite3h.tcl f92f994d9709aeb9e2b6e6f9fc8b069d2f55202c8e23f453edc44390a25982dc
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F tool/mksqlite3internalh.tcl eb994013e833359137eb53a55acdad0b5ae1049b
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F tool/mkvsix.tcl b9e0777a213c23156b6542842c238479e496ebf5
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@ -1656,7 +1657,10 @@ 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 b8c1b5a584aeb6ab63cff875ca16135efeadac16b4b32afa589845477feebf32
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R 9a03aa36b167c86705816bfaa31cdc19
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P 0245adffc6f9b580217e0d2feb396d6895e54cdc25f5dfc9c8f4090b919e9e49
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R 9d91f38d6de2e0aabd371a2c4dbcd832
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T *branch * dbpage
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T *sym-dbpage *
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T -sym-trunk *
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U drh
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Z 8f5e2f1e221681e7d4bf20eb32b86754
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Z 95e75b385006fb35e51e104eb16c88ba
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@ -1 +1 @@
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0245adffc6f9b580217e0d2feb396d6895e54cdc25f5dfc9c8f4090b919e9e49
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c2c1d656e3f52465192c2a697a976cd1837ccc4e10708a2377cff8bf6eaa7d49
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241
src/dbpage.c
Normal file
241
src/dbpage.c
Normal file
@ -0,0 +1,241 @@
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/*
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** 2017-10-11
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**
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** The author disclaims copyright to this source code. In place of
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** a legal notice, here is a blessing:
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**
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** May you do good and not evil.
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** May you find forgiveness for yourself and forgive others.
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** May you share freely, never taking more than you give.
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**
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******************************************************************************
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**
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** This file contains an implementation of the "sqlite_dbpage" virtual table.
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**
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** The sqlite_dbpage virtual table is used to read or write whole raw
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** pages of the database file. The pager interface is used so that
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** uncommitted changes and changes recorded in the WAL file are correctly
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** retrieved.
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*/
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#include "sqliteInt.h" /* Requires access to internal data structures */
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#if (defined(SQLITE_ENABLE_DBPAGE_VTAB) || defined(SQLITE_TEST)) \
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&& !defined(SQLITE_OMIT_VIRTUALTABLE)
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typedef struct DbpageTable DbpageTable;
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typedef struct DbpageCursor DbpageCursor;
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struct DbpageCursor {
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sqlite3_vtab_cursor base; /* Base class. Must be first */
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int pgno; /* Current page number */
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};
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struct DbpageTable {
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sqlite3_vtab base; /* Base class. Must be first */
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sqlite3 *db; /* The database */
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Pager *pPager; /* Pager being read/written */
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int iDb; /* Index of database to analyze */
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int szPage; /* Size of each page in bytes */
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int nPage; /* Number of pages in the file */
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};
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/*
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** Connect to or create a dbpagevfs virtual table.
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*/
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static int dbpageConnect(
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sqlite3 *db,
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void *pAux,
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int argc, const char *const*argv,
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sqlite3_vtab **ppVtab,
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char **pzErr
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){
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DbpageTable *pTab = 0;
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int rc = SQLITE_OK;
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int iDb;
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if( argc>=4 ){
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Token nm;
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sqlite3TokenInit(&nm, (char*)argv[3]);
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iDb = sqlite3FindDb(db, &nm);
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if( iDb<0 ){
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*pzErr = sqlite3_mprintf("no such schema: %s", argv[3]);
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return SQLITE_ERROR;
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}
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}else{
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iDb = 0;
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}
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rc = sqlite3_declare_vtab(db,
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"CREATE TABLE x(pgno INTEGER PRIMARY KEY, data BLOB)");
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if( rc==SQLITE_OK ){
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pTab = (DbpageTable *)sqlite3_malloc64(sizeof(DbpageTable));
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if( pTab==0 ) rc = SQLITE_NOMEM_BKPT;
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}
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assert( rc==SQLITE_OK || pTab==0 );
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if( rc==SQLITE_OK ){
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Btree *pBt = db->aDb[iDb].pBt;
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memset(pTab, 0, sizeof(DbpageTable));
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pTab->db = db;
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pTab->iDb = iDb;
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pTab->pPager = pBt ? sqlite3BtreePager(pBt) : 0;
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}
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*ppVtab = (sqlite3_vtab*)pTab;
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return rc;
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}
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/*
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** Disconnect from or destroy a dbpagevfs virtual table.
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*/
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static int dbpageDisconnect(sqlite3_vtab *pVtab){
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sqlite3_free(pVtab);
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return SQLITE_OK;
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}
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/*
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** idxNum:
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**
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** 0 full table scan
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** 1 pgno=?1
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*/
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static int dbpageBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
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pIdxInfo->estimatedCost = 1.0e6; /* Initial cost estimate */
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return SQLITE_OK;
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}
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/*
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** Open a new dbpagevfs cursor.
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*/
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static int dbpageOpen(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCursor){
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DbpageCursor *pCsr;
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pCsr = (DbpageCursor *)sqlite3_malloc64(sizeof(DbpageCursor));
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if( pCsr==0 ){
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return SQLITE_NOMEM_BKPT;
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}else{
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memset(pCsr, 0, sizeof(DbpageCursor));
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pCsr->base.pVtab = pVTab;
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pCsr->pgno = -1;
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}
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*ppCursor = (sqlite3_vtab_cursor *)pCsr;
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return SQLITE_OK;
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}
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/*
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** Close a dbpagevfs cursor.
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*/
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static int dbpageClose(sqlite3_vtab_cursor *pCursor){
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DbpageCursor *pCsr = (DbpageCursor *)pCursor;
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sqlite3_free(pCsr);
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return SQLITE_OK;
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}
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/*
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** Move a dbpagevfs cursor to the next entry in the file.
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*/
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static int dbpageNext(sqlite3_vtab_cursor *pCursor){
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int rc = SQLITE_OK;
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DbpageCursor *pCsr = (DbpageCursor *)pCursor;
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pCsr->pgno++;
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return rc;
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}
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|
||||
static int dbpageEof(sqlite3_vtab_cursor *pCursor){
|
||||
DbpageCursor *pCsr = (DbpageCursor *)pCursor;
|
||||
DbpageTable *pTab = (DbpageTable *)pCursor->pVtab;
|
||||
return pCsr->pgno >= pTab->nPage;
|
||||
}
|
||||
|
||||
static int dbpageFilter(
|
||||
sqlite3_vtab_cursor *pCursor,
|
||||
int idxNum, const char *idxStr,
|
||||
int argc, sqlite3_value **argv
|
||||
){
|
||||
DbpageCursor *pCsr = (DbpageCursor *)pCursor;
|
||||
DbpageTable *pTab = (DbpageTable *)pCursor->pVtab;
|
||||
int rc = SQLITE_OK;
|
||||
Btree *pBt = pTab->db->aDb[pTab->iDb].pBt;
|
||||
|
||||
if( idxNum==1 ){
|
||||
pCsr->pgno = sqlite3_value_int(argv[0]);
|
||||
}else{
|
||||
pCsr->pgno = 0;
|
||||
}
|
||||
pTab->szPage = sqlite3BtreeGetPageSize(pBt);
|
||||
pTab->nPage = sqlite3BtreeLastPage(pBt);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int dbpageColumn(
|
||||
sqlite3_vtab_cursor *pCursor,
|
||||
sqlite3_context *ctx,
|
||||
int i
|
||||
){
|
||||
DbpageCursor *pCsr = (DbpageCursor *)pCursor;
|
||||
DbpageTable *pTab = (DbpageTable *)pCursor->pVtab;
|
||||
int rc = SQLITE_OK;
|
||||
switch( i ){
|
||||
case 0: { /* pgno */
|
||||
sqlite3_result_int(ctx, pCsr->pgno);
|
||||
break;
|
||||
}
|
||||
case 1: { /* data */
|
||||
DbPage *pDbPage = 0;
|
||||
rc = sqlite3PagerGet(pTab->pPager, pCsr->pgno, (DbPage**)&pDbPage, 0);
|
||||
if( rc==SQLITE_OK ){
|
||||
sqlite3_result_blob(ctx, sqlite3PagerGetData(pDbPage), pTab->szPage,
|
||||
SQLITE_TRANSIENT);
|
||||
}
|
||||
sqlite3PagerUnref(pDbPage);
|
||||
break;
|
||||
}
|
||||
default: { /* schema */
|
||||
sqlite3 *db = sqlite3_context_db_handle(ctx);
|
||||
sqlite3_result_text(ctx, db->aDb[pTab->iDb].zDbSName, -1, SQLITE_STATIC);
|
||||
break;
|
||||
}
|
||||
}
|
||||
return SQLITE_OK;
|
||||
}
|
||||
|
||||
static int dbpageRowid(sqlite3_vtab_cursor *pCursor, sqlite_int64 *pRowid){
|
||||
DbpageCursor *pCsr = (DbpageCursor *)pCursor;
|
||||
*pRowid = pCsr->pgno;
|
||||
return SQLITE_OK;
|
||||
}
|
||||
|
||||
/*
|
||||
** Invoke this routine to register the "dbpage" virtual table module
|
||||
*/
|
||||
int sqlite3DbpageRegister(sqlite3 *db){
|
||||
static sqlite3_module dbpage_module = {
|
||||
0, /* iVersion */
|
||||
dbpageConnect, /* xCreate */
|
||||
dbpageConnect, /* xConnect */
|
||||
dbpageBestIndex, /* xBestIndex */
|
||||
dbpageDisconnect, /* xDisconnect */
|
||||
dbpageDisconnect, /* xDestroy */
|
||||
dbpageOpen, /* xOpen - open a cursor */
|
||||
dbpageClose, /* xClose - close a cursor */
|
||||
dbpageFilter, /* xFilter - configure scan constraints */
|
||||
dbpageNext, /* xNext - advance a cursor */
|
||||
dbpageEof, /* xEof - check for end of scan */
|
||||
dbpageColumn, /* xColumn - read data */
|
||||
dbpageRowid, /* xRowid - read data */
|
||||
0, /* xUpdate */
|
||||
0, /* xBegin */
|
||||
0, /* xSync */
|
||||
0, /* xCommit */
|
||||
0, /* xRollback */
|
||||
0, /* xFindMethod */
|
||||
0, /* xRename */
|
||||
0, /* xSavepoint */
|
||||
0, /* xRelease */
|
||||
0, /* xRollbackTo */
|
||||
};
|
||||
return sqlite3_create_module(db, "sqlite_dbpage", &dbpage_module, 0);
|
||||
}
|
||||
#elif defined(SQLITE_ENABLE_DBPAGE_VTAB)
|
||||
int sqlite3DbpageRegister(sqlite3 *db){ return SQLITE_OK; }
|
||||
#endif /* SQLITE_ENABLE_DBSTAT_VTAB */
|
||||
@ -3054,6 +3054,12 @@ static int openDatabase(
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef SQLITE_ENABLE_DBPAGE_VTAB
|
||||
if( !db->mallocFailed && rc==SQLITE_OK){
|
||||
rc = sqlite3DbpageRegister(db);
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef SQLITE_ENABLE_DBSTAT_VTAB
|
||||
if( !db->mallocFailed && rc==SQLITE_OK){
|
||||
rc = sqlite3DbstatRegister(db);
|
||||
|
||||
@ -4400,6 +4400,9 @@ int sqlite3ThreadCreate(SQLiteThread**,void*(*)(void*),void*);
|
||||
int sqlite3ThreadJoin(SQLiteThread*, void**);
|
||||
#endif
|
||||
|
||||
#if defined(SQLITE_ENABLE_DBPAGE_VTAB) || defined(SQLITE_TEST)
|
||||
int sqlite3DbpageRegister(sqlite3*);
|
||||
#endif
|
||||
#if defined(SQLITE_ENABLE_DBSTAT_VTAB) || defined(SQLITE_TEST)
|
||||
int sqlite3DbstatRegister(sqlite3*);
|
||||
#endif
|
||||
|
||||
@ -394,6 +394,7 @@ foreach file {
|
||||
fts3_icu.c
|
||||
sqlite3rbu.c
|
||||
dbstat.c
|
||||
dbpage.c
|
||||
sqlite3session.c
|
||||
json1.c
|
||||
fts5.c
|
||||
|
||||
Loading…
Reference in New Issue
Block a user