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author | Hans-Christoph Steiner <hans@eds.org> | 2012-03-30 20:42:12 -0400 |
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committer | Hans-Christoph Steiner <hans@eds.org> | 2012-03-30 20:42:12 -0400 |
commit | 7bb481fda9ecb134804b49c2ce77ca28f7eea583 (patch) | |
tree | 31b520b9914d3e2453968abe375f2c102772c3dc /test/fts3_common.tcl |
Imported Upstream version 2.0.3
Diffstat (limited to 'test/fts3_common.tcl')
-rw-r--r-- | test/fts3_common.tcl | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/test/fts3_common.tcl b/test/fts3_common.tcl new file mode 100644 index 0000000..4d4ae38 --- /dev/null +++ b/test/fts3_common.tcl @@ -0,0 +1,290 @@ +# 2009 November 04 +# +# The author disclaims copyright to this source code. In place of +# a legal notice, here is a blessing: +# +# May you do good and not evil. +# May you find forgiveness for yourself and forgive others. +# May you share freely, never taking more than you give. +# +#*********************************************************************** +# +# This file contains common code used the fts3 tests. At one point +# equivalent functionality was implemented in C code. But it is easier +# to use Tcl. +# + +#------------------------------------------------------------------------- +# USAGE: fts3_integrity_check TBL +# +# This proc is used to verify that the full-text index is consistent with +# the contents of the fts3 table. In other words, it checks that the +# data in the %_contents table matches that in the %_segdir and %_segments +# tables. +# +# This is not an efficient procedure. It uses a lot of memory and a lot +# of CPU. But it is better than not checking at all. +# +# The procedure is: +# +# 1) Read the entire full-text index from the %_segdir and %_segments +# tables into memory. For each entry in the index, the following is +# done: +# +# set C($iDocid,$iCol,$iPosition) $zTerm +# +# 2) Iterate through each column of each row of the %_content table. +# Tokenize all documents, and check that for each token there is +# a corresponding entry in the $C array. After checking a token, +# [unset] the $C array entry. +# +# 3) Check that array $C is now empty. +# +# +proc fts3_integrity_check {tbl} { + + fts3_read2 $tbl 1 A + + foreach zTerm [array names A] { + foreach doclist $A($zTerm) { + set docid 0 + while {[string length $doclist]>0} { + set iCol 0 + set iPos 0 + set lPos [list] + set lCol [list] + + # First varint of a doclist-entry is the docid. Delta-compressed + # with respect to the docid of the previous entry. + # + incr docid [gobble_varint doclist] + if {[info exists D($zTerm,$docid)]} { + while {[set iDelta [gobble_varint doclist]] != 0} {} + continue + } + set D($zTerm,$docid) 1 + + # Gobble varints until the 0x00 that terminates the doclist-entry + # is found. + while {[set iDelta [gobble_varint doclist]] > 0} { + if {$iDelta == 1} { + set iCol [gobble_varint doclist] + set iPos 0 + } else { + incr iPos $iDelta + incr iPos -2 + set C($docid,$iCol,$iPos) $zTerm + } + } + } + } + } + + foreach key [array names C] { + #puts "$key -> $C($key)" + } + + + db eval "SELECT * FROM ${tbl}_content" E { + set iCol 0 + set iDoc $E(docid) + foreach col [lrange $E(*) 1 end] { + set c $E($col) + set sql {SELECT fts3_tokenizer_test('simple', $c)} + + foreach {pos term dummy} [db one $sql] { + if {![info exists C($iDoc,$iCol,$pos)]} { + set es "Error at docid=$iDoc col=$iCol pos=$pos. Index is missing" + lappend errors $es + } else { + if {$C($iDoc,$iCol,$pos) != "$term"} { + set es "Error at docid=$iDoc col=$iCol pos=$pos. Index " + append es "has \"$C($iDoc,$iCol,$pos)\", document has \"$term\"" + lappend errors $es + } + unset C($iDoc,$iCol,$pos) + } + } + incr iCol + } + } + + foreach c [array names C] { + lappend errors "Bad index entry: $c -> $C($c)" + } + + if {[info exists errors]} { return [join $errors "\n"] } + return "ok" +} + +# USAGE: fts3_terms TBL WHERE +# +# Argument TBL must be the name of an FTS3 table. Argument WHERE is an +# SQL expression that will be used as the WHERE clause when scanning +# the %_segdir table. As in the following query: +# +# "SELECT * FROM ${TBL}_segdir WHERE ${WHERE}" +# +# This function returns a list of all terms present in the segments +# selected by the statement above. +# +proc fts3_terms {tbl where} { + fts3_read $tbl $where a + return [lsort [array names a]] +} + + +# USAGE: fts3_doclist TBL TERM WHERE +# +# Argument TBL must be the name of an FTS3 table. TERM is a term that may +# or may not be present in the table. Argument WHERE is used to select a +# subset of the b-tree segments in the associated full-text index as +# described above for [fts3_terms]. +# +# This function returns the results of merging the doclists associated +# with TERM in the selected segments. Each doclist is an element of the +# returned list. Each doclist is formatted as follows: +# +# [$docid ?$col[$off1 $off2...]?...] +# +# The formatting is odd for a Tcl command in order to be compatible with +# the original C-language implementation. If argument WHERE is "1", then +# any empty doclists are omitted from the returned list. +# +proc fts3_doclist {tbl term where} { + fts3_read $tbl $where a + + + foreach doclist $a($term) { + set docid 0 + + while {[string length $doclist]>0} { + set iCol 0 + set iPos 0 + set lPos [list] + set lCol [list] + incr docid [gobble_varint doclist] + + while {[set iDelta [gobble_varint doclist]] > 0} { + if {$iDelta == 1} { + lappend lCol [list $iCol $lPos] + set iPos 0 + set lPos [list] + set iCol [gobble_varint doclist] + } else { + incr iPos $iDelta + incr iPos -2 + lappend lPos $iPos + } + } + + if {[llength $lPos]>0} { + lappend lCol [list $iCol $lPos] + } + + if {$where != "1" || [llength $lCol]>0} { + set ret($docid) $lCol + } else { + unset -nocomplain ret($docid) + } + } + } + + set lDoc [list] + foreach docid [lsort -integer [array names ret]] { + set lCol [list] + set cols "" + foreach col $ret($docid) { + foreach {iCol lPos} $col {} + append cols " $iCol\[[join $lPos { }]\]" + } + lappend lDoc "\[${docid}${cols}\]" + } + + join $lDoc " " +} + +########################################################################### + +proc gobble_varint {varname} { + upvar $varname blob + set n [read_fts3varint $blob ret] + set blob [string range $blob $n end] + return $ret +} +proc gobble_string {varname nLength} { + upvar $varname blob + set ret [string range $blob 0 [expr $nLength-1]] + set blob [string range $blob $nLength end] + return $ret +} + +# The argument is a blob of data representing an FTS3 segment leaf. +# Return a list consisting of alternating terms (strings) and doclists +# (blobs of data). +# +proc fts3_readleaf {blob} { + set zPrev "" + set terms [list] + + while {[string length $blob] > 0} { + set nPrefix [gobble_varint blob] + set nSuffix [gobble_varint blob] + + set zTerm [string range $zPrev 0 [expr $nPrefix-1]] + append zTerm [gobble_string blob $nSuffix] + set doclist [gobble_string blob [gobble_varint blob]] + + lappend terms $zTerm $doclist + set zPrev $zTerm + } + + return $terms +} + +proc fts3_read2 {tbl where varname} { + upvar $varname a + array unset a + db eval " SELECT start_block, leaves_end_block, root + FROM ${tbl}_segdir WHERE $where + ORDER BY level ASC, idx DESC + " { + if {$start_block == 0} { + foreach {t d} [fts3_readleaf $root] { lappend a($t) $d } + } else { + db eval " SELECT block + FROM ${tbl}_segments + WHERE blockid>=$start_block AND blockid<=$leaves_end_block + ORDER BY blockid + " { + foreach {t d} [fts3_readleaf $block] { lappend a($t) $d } + + } + } + } +} + +proc fts3_read {tbl where varname} { + upvar $varname a + array unset a + db eval " SELECT start_block, leaves_end_block, root + FROM ${tbl}_segdir WHERE $where + ORDER BY level DESC, idx ASC + " { + if {$start_block == 0} { + foreach {t d} [fts3_readleaf $root] { lappend a($t) $d } + } else { + db eval " SELECT block + FROM ${tbl}_segments + WHERE blockid>=$start_block AND blockid<$leaves_end_block + ORDER BY blockid + " { + foreach {t d} [fts3_readleaf $block] { lappend a($t) $d } + + } + } + } +} + +########################################################################## + |