diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 19ad4a1..3891b05 100755
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: [ '1.18', '1.19', '1.20' ]
+        go: [ '1.20', '1.21' ]
     steps:
       - uses: actions/checkout@v3
 
diff --git a/acl/go.mod b/acl/go.mod
index 4c069a5..39c89fb 100644
--- a/acl/go.mod
+++ b/acl/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/acl
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -9,8 +9,8 @@ replace (
 )
 
 require (
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/xtest v0.1.4
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/xtest v0.2.0
 )
 
-require go.osspkg.com/goppy/syscall v0.1.3 // indirect
+require go.osspkg.com/goppy/syscall v0.2.0 // indirect
diff --git a/app/go.mod b/app/go.mod
index a30435d..04caca5 100644
--- a/app/go.mod
+++ b/app/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/app
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/console => ../console
@@ -16,15 +16,15 @@ replace (
 
 require (
 	go.osspkg.com/algorithms v1.3.1
-	go.osspkg.com/goppy/console v0.1.2
-	go.osspkg.com/goppy/env v0.1.2
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/iofile v0.1.7
-	go.osspkg.com/goppy/iosync v0.1.5
-	go.osspkg.com/goppy/syscall v0.1.3
-	go.osspkg.com/goppy/xc v0.1.1
-	go.osspkg.com/goppy/xlog v0.1.7
-	go.osspkg.com/goppy/xtest v0.1.4
+	go.osspkg.com/goppy/console v0.2.0
+	go.osspkg.com/goppy/env v0.2.0
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/iofile v0.2.0
+	go.osspkg.com/goppy/iosync v0.2.0
+	go.osspkg.com/goppy/syscall v0.2.0
+	go.osspkg.com/goppy/xc v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
+	go.osspkg.com/goppy/xtest v0.2.0
 )
 
 require (
diff --git a/auth/go.mod b/auth/go.mod
index 8a03202..0487ec7 100644
--- a/auth/go.mod
+++ b/auth/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/auth
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/encryption => ../encryption
@@ -18,13 +18,13 @@ replace (
 
 require (
 	github.com/mailru/easyjson v0.7.7
-	go.osspkg.com/goppy/encryption v0.1.6
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/ioutil v0.1.3
-	go.osspkg.com/goppy/plugins v0.1.2
-	go.osspkg.com/goppy/random v0.1.2
-	go.osspkg.com/goppy/web v0.1.11
-	go.osspkg.com/goppy/xtest v0.1.4
+	go.osspkg.com/goppy/encryption v0.2.0
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/ioutil v0.2.0
+	go.osspkg.com/goppy/plugins v0.2.0
+	go.osspkg.com/goppy/random v0.2.0
+	go.osspkg.com/goppy/web v0.2.0
+	go.osspkg.com/goppy/xtest v0.2.0
 	golang.org/x/oauth2 v0.16.0
 )
 
@@ -33,11 +33,11 @@ require (
 	cloud.google.com/go/compute/metadata v0.2.3 // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
-	go.osspkg.com/goppy/iosync v0.1.5 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
-	go.osspkg.com/goppy/xc v0.1.1 // indirect
-	go.osspkg.com/goppy/xlog v0.1.7 // indirect
-	go.osspkg.com/goppy/xnet v0.1.3 // indirect
+	go.osspkg.com/goppy/iosync v0.2.0 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
+	go.osspkg.com/goppy/xc v0.2.0 // indirect
+	go.osspkg.com/goppy/xlog v0.2.0 // indirect
+	go.osspkg.com/goppy/xnet v0.2.0 // indirect
 	go.osspkg.com/static v1.4.0 // indirect
 	golang.org/x/net v0.20.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
diff --git a/console/go.mod b/console/go.mod
index 5be6e7f..56fe87b 100644
--- a/console/go.mod
+++ b/console/go.mod
@@ -1,12 +1,12 @@
 module go.osspkg.com/goppy/console
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
 	go.osspkg.com/goppy/syscall => ../syscall
 )
 
-require go.osspkg.com/goppy/errors v0.1.2
+require go.osspkg.com/goppy/errors v0.2.0
 
-require go.osspkg.com/goppy/syscall v0.1.3 // indirect
+require go.osspkg.com/goppy/syscall v0.2.0 // indirect
diff --git a/domain/go.mod b/domain/go.mod
index 89e6ded..797956e 100644
--- a/domain/go.mod
+++ b/domain/go.mod
@@ -1,3 +1,3 @@
 module go.osspkg.com/goppy/domain
 
-go 1.18
+go 1.20
diff --git a/encryption/go.mod b/encryption/go.mod
index 66005e6..2135d4b 100644
--- a/encryption/go.mod
+++ b/encryption/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/encryption
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -10,10 +10,10 @@ replace (
 )
 
 require (
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/random v0.1.2
-	go.osspkg.com/goppy/xtest v0.1.4
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/random v0.2.0
+	go.osspkg.com/goppy/xtest v0.2.0
 	golang.org/x/crypto v0.18.0
 )
 
-require go.osspkg.com/goppy/syscall v0.1.3 // indirect
+require go.osspkg.com/goppy/syscall v0.2.0 // indirect
diff --git a/env/go.mod b/env/go.mod
index 33180fd..e6a868d 100644
--- a/env/go.mod
+++ b/env/go.mod
@@ -1,3 +1,3 @@
 module go.osspkg.com/goppy/env
 
-go 1.18
+go 1.20
diff --git a/epoll/go.mod b/epoll/go.mod
index a655f01..39623f4 100644
--- a/epoll/go.mod
+++ b/epoll/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/epoll
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -13,16 +13,16 @@ replace (
 )
 
 require (
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/iosync v0.1.5
-	go.osspkg.com/goppy/xc v0.1.1
-	go.osspkg.com/goppy/xlog v0.1.7
-	go.osspkg.com/goppy/xnet v0.1.3
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/iosync v0.2.0
+	go.osspkg.com/goppy/xc v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
+	go.osspkg.com/goppy/xnet v0.2.0
 	golang.org/x/sys v0.16.0
 )
 
 require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
 )
diff --git a/errors/go.mod b/errors/go.mod
index 50c2b8d..65bb81a 100644
--- a/errors/go.mod
+++ b/errors/go.mod
@@ -1,7 +1,7 @@
 module go.osspkg.com/goppy/errors
 
-go 1.18
+go 1.20
 
 replace go.osspkg.com/goppy/syscall => ../syscall
 
-require go.osspkg.com/goppy/syscall v0.1.3
+require go.osspkg.com/goppy/syscall v0.2.0
diff --git a/examples/go.mod b/examples/go.mod
index 5bfa574..50bdf2d 100644
--- a/examples/go.mod
+++ b/examples/go.mod
@@ -1,6 +1,6 @@
 module examples
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy => ../
@@ -38,7 +38,7 @@ replace (
 
 require (
 	go.osspkg.com/goppy v0.0.0-00010101000000-000000000000
-	go.osspkg.com/goppy/app v0.1.11
+	go.osspkg.com/goppy/app v0.1.12
 	go.osspkg.com/goppy/auth v0.0.0-00010101000000-000000000000
 	go.osspkg.com/goppy/console v0.1.2
 	go.osspkg.com/goppy/geoip v0.0.0-00010101000000-000000000000
@@ -84,9 +84,9 @@ require (
 	go.osspkg.com/goppy/encryption v0.1.6 // indirect
 	go.osspkg.com/goppy/env v0.1.2 // indirect
 	go.osspkg.com/goppy/errors v0.1.2 // indirect
-	go.osspkg.com/goppy/iofile v0.1.6 // indirect
+	go.osspkg.com/goppy/iofile v0.1.7 // indirect
 	go.osspkg.com/goppy/ioutil v0.1.3 // indirect
-	go.osspkg.com/goppy/orm v0.1.8 // indirect
+	go.osspkg.com/goppy/orm v0.1.9 // indirect
 	go.osspkg.com/goppy/random v0.1.2 // indirect
 	go.osspkg.com/goppy/sqlcommon v0.1.8 // indirect
 	go.osspkg.com/goppy/xnet v0.1.3 // indirect
diff --git a/geoip/go.mod b/geoip/go.mod
index 661ae6d..7043677 100644
--- a/geoip/go.mod
+++ b/geoip/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/geoip
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -17,21 +17,21 @@ replace (
 
 require (
 	github.com/oschwald/geoip2-golang v1.9.0
-	go.osspkg.com/goppy/plugins v0.1.2
-	go.osspkg.com/goppy/web v0.1.11
+	go.osspkg.com/goppy/plugins v0.2.0
+	go.osspkg.com/goppy/web v0.2.0
 )
 
 require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/oschwald/maxminddb-golang v1.11.0 // indirect
-	go.osspkg.com/goppy/errors v0.1.2 // indirect
-	go.osspkg.com/goppy/iosync v0.1.5 // indirect
-	go.osspkg.com/goppy/ioutil v0.1.3 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
-	go.osspkg.com/goppy/xc v0.1.1 // indirect
-	go.osspkg.com/goppy/xlog v0.1.7 // indirect
-	go.osspkg.com/goppy/xnet v0.1.3 // indirect
+	go.osspkg.com/goppy/errors v0.2.0 // indirect
+	go.osspkg.com/goppy/iosync v0.2.0 // indirect
+	go.osspkg.com/goppy/ioutil v0.2.0 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
+	go.osspkg.com/goppy/xc v0.2.0 // indirect
+	go.osspkg.com/goppy/xlog v0.2.0 // indirect
+	go.osspkg.com/goppy/xnet v0.2.0 // indirect
 	go.osspkg.com/static v1.4.0 // indirect
 	golang.org/x/sys v0.16.0 // indirect
 )
diff --git a/go.mod b/go.mod
index 1ea704e..7cd9cdf 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/app => ./app
@@ -17,13 +17,13 @@ replace (
 )
 
 require (
-	go.osspkg.com/goppy/app v0.1.12
-	go.osspkg.com/goppy/console v0.1.2
-	go.osspkg.com/goppy/env v0.1.2
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/iofile v0.1.7
-	go.osspkg.com/goppy/plugins v0.1.2
-	go.osspkg.com/goppy/xlog v0.1.7
+	go.osspkg.com/goppy/app v0.2.0
+	go.osspkg.com/goppy/console v0.2.0
+	go.osspkg.com/goppy/env v0.2.0
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/iofile v0.2.0
+	go.osspkg.com/goppy/plugins v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
 	gopkg.in/yaml.v3 v3.0.1
 )
 
@@ -31,7 +31,7 @@ require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	go.osspkg.com/algorithms v1.3.1 // indirect
-	go.osspkg.com/goppy/iosync v0.1.5 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
-	go.osspkg.com/goppy/xc v0.1.1 // indirect
+	go.osspkg.com/goppy/iosync v0.2.0 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
+	go.osspkg.com/goppy/xc v0.2.0 // indirect
 )
diff --git a/go.work b/go.work
index b77731a..c33e37d 100644
--- a/go.work
+++ b/go.work
@@ -1,4 +1,4 @@
-go 1.18
+go 1.20
 
 use (
 	.
@@ -25,6 +25,7 @@ use (
 	./plugins
 	./random
 	./routine
+	./search
 	./shell
 	./sip
 	./sqlcommon
diff --git a/go.work.sum b/go.work.sum
index 42972bc..19bd37b 100644
--- a/go.work.sum
+++ b/go.work.sum
@@ -4,6 +4,18 @@ github.com/alecthomas/kingpin/v2 v2.3.2 h1:H0aULhgmSzN8xQ3nX1uxtdlTHYoPLu5AhHxWr
 github.com/alecthomas/kingpin/v2 v2.3.2/go.mod h1:0gyi0zQnjuFk8xrkNKamJoyUo382HRL7ATRpFZCw6tE=
 github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 h1:s6gZFSlWYmbqAuRjVTiNNhvNRfY2Wxp9nhfyel4rklc=
 github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137/go.mod h1:OMCwj8VM1Kc9e19TLln2VL61YJF0x1XFtfdL4JdbSyE=
+github.com/blevesearch/go-metrics v0.0.0-20201227073835-cf1acfcdf475 h1:kDy+zgJFJJoJYBvdfBSiZYBbdsUL0XcjHYWezpQBGPA=
+github.com/blevesearch/go-metrics v0.0.0-20201227073835-cf1acfcdf475/go.mod h1:9eJDeqxJ3E7WnLebQUlPD7ZjSce7AnDb9vjGmMCbD0A=
+github.com/blevesearch/goleveldb v1.0.1 h1:iAtV2Cu5s0GD1lwUiekkFHe2gTMCCNVj2foPclDLIFI=
+github.com/blevesearch/goleveldb v1.0.1/go.mod h1:WrU8ltZbIp0wAoig/MHbrPCXSOLpe79nz5lv5nqfYrQ=
+github.com/blevesearch/snowball v0.6.1 h1:cDYjn/NCH+wwt2UdehaLpr2e4BwLIjN4V/TdLsL+B5A=
+github.com/blevesearch/snowball v0.6.1/go.mod h1:ZF0IBg5vgpeoUhnMza2v0A/z8m1cWPlwhke08LpNusg=
+github.com/blevesearch/stempel v0.2.0 h1:CYzVPaScODMvgE9o+kf6D4RJ/VRomyi9uHF+PtB+Afc=
+github.com/blevesearch/stempel v0.2.0/go.mod h1:wjeTHqQv+nQdbPuJ/YcvOjTInA2EIc6Ks1FoSUzSLvc=
+github.com/couchbase/ghistogram v0.1.0 h1:b95QcQTCzjTUocDXp/uMgSNQi8oj1tGwnJ4bODWZnps=
+github.com/couchbase/ghistogram v0.1.0/go.mod h1:s1Jhy76zqfEecpNWJfWUiKZookAFaiGOEoyzgHt9i7k=
+github.com/couchbase/moss v0.2.0 h1:VCYrMzFwEryyhRSeI+/b3tRBSeTpi/8gn5Kf6dxqn+o=
+github.com/couchbase/moss v0.2.0/go.mod h1:9MaHIaRuy9pvLPUJxB8sh8OrLfyDczECVL37grCIubs=
 github.com/creack/pty v1.1.9 h1:uDmaGzcdjhF4i/plgjmEsriH11Y0o7RKapEf/LDaM3w=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-kit/log v0.2.1 h1:MRVx0/zhvdseW+Gza6N9rVzU/IVzaeE1SFI4raAhmBU=
@@ -13,39 +25,58 @@ github.com/go-logfmt/logfmt v0.5.1/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KE
 github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da h1:oI5xCqsCo564l8iNU+DwB5epxmsaqB+rhGL0m5jtYqE=
 github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/google/gofuzz v1.2.0 h1:xRy4A+RhZaiKjJ1bPfwQ8sedCA+YS2YcCHW6ec7JMi0=
+github.com/google/gofuzz v1.2.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/s2a-go v0.1.4 h1:1kZ/sQM3srePvKs3tXAvQzo66XfcReoqFpIpIccE7Oc=
 github.com/google/s2a-go v0.1.4/go.mod h1:Ej+mSEMGRnqRzjc7VtF+jdBwYG5fuJfiZ8ELkjEwM0A=
 github.com/googleapis/enterprise-certificate-proxy v0.2.3 h1:yk9/cqRKtT9wXZSsRH9aurXEpJX+U6FLtpYTdC3R06k=
 github.com/googleapis/enterprise-certificate-proxy v0.2.3/go.mod h1:AwSRAtLfXpU5Nm3pW+v7rGDHp09LsPtGY9MduiEsR9k=
 github.com/googleapis/gax-go/v2 v2.11.0 h1:9V9PWXEsWnPpQhu/PeQIkS4eGzMlTLGgt80cUUI8Ki4=
 github.com/googleapis/gax-go/v2 v2.11.0/go.mod h1:DxmR61SGKkGLa2xigwuZIQpkCI2S5iydzRfb3peWZJI=
+github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
+github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
 github.com/jpillora/backoff v1.0.0 h1:uvFg412JmmHBHw7iwprIxkPMI+sGQ4kzOWsMeHnm2EA=
 github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
-github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/julienschmidt/httprouter v1.3.0 h1:U0609e9tgbseu3rBINet9P48AI/D3oJs4dN7jwJOQ1U=
 github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
 github.com/kr/pty v1.1.1 h1:VkoXIwSboBpnk99O/KFauAEILuNHv5DVFKZMBN/gUgw=
-github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
+github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
-github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
 github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f h1:KUppIJq7/+SVif2QVs3tOP0zanoHgBEVAwHxUSIzRqU=
 github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e h1:aoZm08cpOy4WuID//EZDgcC4zIxODThtZNPirFr42+A=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/spf13/cobra v1.7.0 h1:hyqWnYt1ZQShIddO5kBpj3vu05/++x6tJ6dg8EC572I=
+github.com/spf13/cobra v1.7.0/go.mod h1:uLxZILRyS/50WlhOIKD7W6V5bgeIt+4sICxh6uRMrb0=
+github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
+github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0 h1:1zr/of2m5FGMsad5YfcqgdqdWrIhu+EBEJRhR1U7z/c=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/xhit/go-str2duration/v2 v2.1.0 h1:lxklc02Drh6ynqX+DdPyp5pCKLUQpRT8bp8Ydu2Bstc=
 github.com/xhit/go-str2duration/v2 v2.1.0/go.mod h1:ohY8p+0f07DiV6Em5LKB0s2YpLtXVyJfNt1+BlmyAsU=
 github.com/yuin/goldmark v1.4.13 h1:fVcFKWvrslecOb/tg+Cc05dkeYx540o0FuFt3nUVDoE=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+go.etcd.io/gofail v0.1.0 h1:XItAMIhOojXFQMgrxjnd2EIIHun/d5qL0Pf7FzVTkFg=
+go.etcd.io/gofail v0.1.0/go.mod h1:VZBCXYGZhHAinaBiiqYvuDynvahNsAyLFwB3kEHKz1M=
 go.opencensus.io v0.24.0 h1:y73uSU6J157QMP2kn2r30vwW1A2W2WFwSCGnAVxeaD0=
 go.opencensus.io v0.24.0/go.mod h1:vNK8G9p7aAivkbmorf4v+7Hgx+Zs0yY+0fOtgBfjQKo=
+golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
+golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
 golang.org/x/sync v0.4.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
+golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.16.0 h1:m+B6fahuftsE9qjo0VWp2FW0mB3MTJvR0BaMQrq0pmE=
 golang.org/x/term v0.16.0/go.mod h1:yn7UURbUtPyrVJPGPq404EukNFxcm/foM+bV/bfcDsY=
-golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 google.golang.org/api v0.126.0 h1:q4GJq+cAdMAC7XP7njvQ4tvohGLiSlytuL4BQxbIZ+o=
 google.golang.org/api v0.126.0/go.mod h1:mBwVAtz+87bEN6CbA1GtZPDOqY2R5ONPqJeIlvyo4Aw=
diff --git a/graphics/go.mod b/graphics/go.mod
index ac95d6d..6e5418c 100644
--- a/graphics/go.mod
+++ b/graphics/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/graphics
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -8,8 +8,8 @@ replace (
 )
 
 require (
-	go.osspkg.com/goppy/errors v0.1.2
+	go.osspkg.com/goppy/errors v0.2.0
 	golang.org/x/image v0.15.0
 )
 
-require go.osspkg.com/goppy/syscall v0.1.3 // indirect
+require go.osspkg.com/goppy/syscall v0.2.0 // indirect
diff --git a/graphics/images.go b/graphics/images.go
index b57a856..598eae0 100644
--- a/graphics/images.go
+++ b/graphics/images.go
@@ -1,6 +1,6 @@
 /*
- *  Copyright (c) 2023 Mikhail Knyazhev <markus621@gmail.com>. All rights reserved.
- *  Use of this source code is governed by a BSD-3-Clause license that can be found in the LICENSE file.
+ *  Copyright (c) 2022-2024 Mikhail Knyazhev <markus621@yandex.ru>. All rights reserved.
+ *  Use of this source code is governed by a BSD 3-Clause license that can be found in the LICENSE file.
  */
 
 package graphics
diff --git a/iofile/go.mod b/iofile/go.mod
index df866d5..716f82f 100644
--- a/iofile/go.mod
+++ b/iofile/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/iofile
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -10,15 +10,15 @@ replace (
 )
 
 require (
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/iosync v0.1.5
-	go.osspkg.com/goppy/xtest v0.1.4
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/iosync v0.2.0
+	go.osspkg.com/goppy/xtest v0.2.0
 	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
 	github.com/kr/pretty v0.3.1 // indirect
 	github.com/rogpeppe/go-internal v1.10.0 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
 	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 )
diff --git a/iosync/go.mod b/iosync/go.mod
index 1fef374..d5fd2b0 100644
--- a/iosync/go.mod
+++ b/iosync/go.mod
@@ -1,7 +1,7 @@
 module go.osspkg.com/goppy/iosync
 
-go 1.18
+go 1.20
 
 replace go.osspkg.com/goppy/xtest => ../xtest
 
-require go.osspkg.com/goppy/xtest v0.1.4
+require go.osspkg.com/goppy/xtest v0.2.0
diff --git a/ioutil/go.mod b/ioutil/go.mod
index 44af648..2a0c014 100644
--- a/ioutil/go.mod
+++ b/ioutil/go.mod
@@ -1,12 +1,12 @@
 module go.osspkg.com/goppy/ioutil
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
 	go.osspkg.com/goppy/syscall => ../syscall
 )
 
-require go.osspkg.com/goppy/errors v0.1.2
+require go.osspkg.com/goppy/errors v0.2.0
 
-require go.osspkg.com/goppy/syscall v0.1.3 // indirect
+require go.osspkg.com/goppy/syscall v0.2.0 // indirect
diff --git a/metrics/go.mod b/metrics/go.mod
index a6123bb..2d62f72 100644
--- a/metrics/go.mod
+++ b/metrics/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/metrics
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/env => ../env
@@ -19,14 +19,14 @@ replace (
 require (
 	github.com/prometheus/client_golang v1.18.0
 	github.com/prometheus/client_model v0.5.0
-	go.osspkg.com/goppy/env v0.1.2
-	go.osspkg.com/goppy/plugins v0.1.2
-	go.osspkg.com/goppy/syscall v0.1.3
-	go.osspkg.com/goppy/web v0.1.11
-	go.osspkg.com/goppy/xc v0.1.1
-	go.osspkg.com/goppy/xlog v0.1.7
-	go.osspkg.com/goppy/xnet v0.1.3
-	go.osspkg.com/goppy/xtest v0.1.4
+	go.osspkg.com/goppy/env v0.2.0
+	go.osspkg.com/goppy/plugins v0.2.0
+	go.osspkg.com/goppy/syscall v0.2.0
+	go.osspkg.com/goppy/web v0.2.0
+	go.osspkg.com/goppy/xc v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
+	go.osspkg.com/goppy/xnet v0.2.0
+	go.osspkg.com/goppy/xtest v0.2.0
 	google.golang.org/protobuf v1.32.0
 )
 
@@ -38,9 +38,9 @@ require (
 	github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect
 	github.com/prometheus/common v0.45.0 // indirect
 	github.com/prometheus/procfs v0.12.0 // indirect
-	go.osspkg.com/goppy/errors v0.1.2 // indirect
-	go.osspkg.com/goppy/iosync v0.1.5 // indirect
-	go.osspkg.com/goppy/ioutil v0.1.3 // indirect
+	go.osspkg.com/goppy/errors v0.2.0 // indirect
+	go.osspkg.com/goppy/iosync v0.2.0 // indirect
+	go.osspkg.com/goppy/ioutil v0.2.0 // indirect
 	go.osspkg.com/static v1.4.0 // indirect
 	golang.org/x/sys v0.16.0 // indirect
 )
diff --git a/orm/go.mod b/orm/go.mod
index 7590c59..c52027e 100644
--- a/orm/go.mod
+++ b/orm/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/orm
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -14,18 +14,18 @@ replace (
 )
 
 require (
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/iofile v0.1.7
-	go.osspkg.com/goppy/sqlcommon v0.1.8
-	go.osspkg.com/goppy/xc v0.1.1
-	go.osspkg.com/goppy/xlog v0.1.7
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/iofile v0.2.0
+	go.osspkg.com/goppy/sqlcommon v0.2.0
+	go.osspkg.com/goppy/xc v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
 )
 
 require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/kr/text v0.2.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
-	go.osspkg.com/goppy/iosync v0.1.5 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
+	go.osspkg.com/goppy/iosync v0.2.0 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/ormmysql/go.mod b/ormmysql/go.mod
index 63ed11a..38ed867 100644
--- a/ormmysql/go.mod
+++ b/ormmysql/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/ormmysql
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -18,20 +18,20 @@ replace (
 
 require (
 	github.com/go-sql-driver/mysql v1.7.1
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/orm v0.1.9
-	go.osspkg.com/goppy/plugins v0.1.2
-	go.osspkg.com/goppy/routine v0.1.6
-	go.osspkg.com/goppy/sqlcommon v0.1.8
-	go.osspkg.com/goppy/xc v0.1.1
-	go.osspkg.com/goppy/xlog v0.1.7
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/orm v0.2.0
+	go.osspkg.com/goppy/plugins v0.2.0
+	go.osspkg.com/goppy/routine v0.2.0
+	go.osspkg.com/goppy/sqlcommon v0.2.0
+	go.osspkg.com/goppy/xc v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
 )
 
 require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
-	go.osspkg.com/goppy/iofile v0.1.7 // indirect
-	go.osspkg.com/goppy/iosync v0.1.5 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
+	go.osspkg.com/goppy/iofile v0.2.0 // indirect
+	go.osspkg.com/goppy/iosync v0.2.0 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/ormpgsql/go.mod b/ormpgsql/go.mod
index 390f285..1532307 100644
--- a/ormpgsql/go.mod
+++ b/ormpgsql/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/ormpgsql
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -18,20 +18,20 @@ replace (
 
 require (
 	github.com/lib/pq v1.10.9
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/orm v0.1.9
-	go.osspkg.com/goppy/plugins v0.1.2
-	go.osspkg.com/goppy/routine v0.1.6
-	go.osspkg.com/goppy/sqlcommon v0.1.8
-	go.osspkg.com/goppy/xc v0.1.1
-	go.osspkg.com/goppy/xlog v0.1.7
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/orm v0.2.0
+	go.osspkg.com/goppy/plugins v0.2.0
+	go.osspkg.com/goppy/routine v0.2.0
+	go.osspkg.com/goppy/sqlcommon v0.2.0
+	go.osspkg.com/goppy/xc v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
 )
 
 require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
-	go.osspkg.com/goppy/iofile v0.1.7 // indirect
-	go.osspkg.com/goppy/iosync v0.1.5 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
+	go.osspkg.com/goppy/iofile v0.2.0 // indirect
+	go.osspkg.com/goppy/iosync v0.2.0 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/ormsqlite/go.mod b/ormsqlite/go.mod
index 6362691..72a5e13 100644
--- a/ormsqlite/go.mod
+++ b/ormsqlite/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/ormsqlite
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -18,20 +18,20 @@ replace (
 
 require (
 	github.com/mattn/go-sqlite3 v1.14.19
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/iofile v0.1.7
-	go.osspkg.com/goppy/orm v0.1.9
-	go.osspkg.com/goppy/plugins v0.1.2
-	go.osspkg.com/goppy/routine v0.1.6
-	go.osspkg.com/goppy/sqlcommon v0.1.8
-	go.osspkg.com/goppy/xc v0.1.1
-	go.osspkg.com/goppy/xlog v0.1.7
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/iofile v0.2.0
+	go.osspkg.com/goppy/orm v0.2.0
+	go.osspkg.com/goppy/plugins v0.2.0
+	go.osspkg.com/goppy/routine v0.2.0
+	go.osspkg.com/goppy/sqlcommon v0.2.0
+	go.osspkg.com/goppy/xc v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
 )
 
 require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
-	go.osspkg.com/goppy/iosync v0.1.5 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
+	go.osspkg.com/goppy/iosync v0.2.0 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/plugins/go.mod b/plugins/go.mod
index a4b9bbe..7e1a974 100644
--- a/plugins/go.mod
+++ b/plugins/go.mod
@@ -1,3 +1,3 @@
 module go.osspkg.com/goppy/plugins
 
-go 1.18
+go 1.20
diff --git a/random/go.mod b/random/go.mod
index cb9297a..e47782b 100644
--- a/random/go.mod
+++ b/random/go.mod
@@ -1,3 +1,3 @@
 module go.osspkg.com/goppy/random
 
-go 1.18
+go 1.20
diff --git a/routine/go.mod b/routine/go.mod
index 4df9544..48b2670 100644
--- a/routine/go.mod
+++ b/routine/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/routine
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -10,8 +10,8 @@ replace (
 )
 
 require (
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/iosync v0.1.5
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/iosync v0.2.0
 )
 
-require go.osspkg.com/goppy/syscall v0.1.3 // indirect
+require go.osspkg.com/goppy/syscall v0.2.0 // indirect
diff --git a/search/config.go b/search/config.go
new file mode 100644
index 0000000..ff982b0
--- /dev/null
+++ b/search/config.go
@@ -0,0 +1,36 @@
+/*
+ *  Copyright (c) 2022-2024 Mikhail Knyazhev <markus621@yandex.ru>. All rights reserved.
+ *  Use of this source code is governed by a BSD 3-Clause license that can be found in the LICENSE file.
+ */
+
+package search
+
+const (
+	indexFilename = "/store/root.bolt"
+
+	customAnalyzerName = "goppy_analyzer"
+	customFilterName   = "goppy_filter"
+
+	structScoreField = "Score"
+
+	FieldText = "text"
+	FieldDate = "date"
+)
+
+type (
+	Config struct {
+		Search ConfigItem `yaml:"search"`
+	}
+	ConfigItem struct {
+		Folder  string        `yaml:"folder"`
+		Indexes []ConfigIndex `yaml:"indexes"`
+	}
+	ConfigIndex struct {
+		Name   string             `yaml:"name"`
+		Fields []ConfigIndexField `yaml:"fields"`
+	}
+	ConfigIndexField struct {
+		Name string `yaml:"name"`
+		Type string `yaml:"type"`
+	}
+)
diff --git a/search/go.mod b/search/go.mod
new file mode 100644
index 0000000..833f656
--- /dev/null
+++ b/search/go.mod
@@ -0,0 +1,55 @@
+module go.osspkg.com/goppy/search
+
+go 1.20
+
+replace (
+	go.osspkg.com/goppy/errors => ../errors
+	go.osspkg.com/goppy/iofile => ../iofile
+	go.osspkg.com/goppy/iosync => ../iosync
+	go.osspkg.com/goppy/syscall => ../syscall
+	go.osspkg.com/goppy/xtest => ../xtest
+)
+
+require (
+	github.com/blevesearch/bleve/v2 v2.3.10
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/iofile v0.2.0
+	go.osspkg.com/goppy/xtest v0.2.0
+)
+
+require (
+	github.com/RoaringBitmap/roaring v1.2.3 // indirect
+	github.com/bits-and-blooms/bitset v1.2.0 // indirect
+	github.com/blevesearch/bleve_index_api v1.0.6 // indirect
+	github.com/blevesearch/geo v0.1.18 // indirect
+	github.com/blevesearch/go-porterstemmer v1.0.3 // indirect
+	github.com/blevesearch/gtreap v0.1.1 // indirect
+	github.com/blevesearch/mmap-go v1.0.4 // indirect
+	github.com/blevesearch/scorch_segment_api/v2 v2.1.6 // indirect
+	github.com/blevesearch/segment v0.9.1 // indirect
+	github.com/blevesearch/snowballstem v0.9.0 // indirect
+	github.com/blevesearch/upsidedown_store_api v1.0.2 // indirect
+	github.com/blevesearch/vellum v1.0.10 // indirect
+	github.com/blevesearch/zapx/v11 v11.3.10 // indirect
+	github.com/blevesearch/zapx/v12 v12.3.10 // indirect
+	github.com/blevesearch/zapx/v13 v13.3.10 // indirect
+	github.com/blevesearch/zapx/v14 v14.3.10 // indirect
+	github.com/blevesearch/zapx/v15 v15.3.13 // indirect
+	github.com/golang/geo v0.0.0-20210211234256-740aa86cb551 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/golang/snappy v0.0.1 // indirect
+	github.com/google/go-cmp v0.5.9 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/mschoch/smat v0.2.0 // indirect
+	github.com/stretchr/testify v1.8.4 // indirect
+	go.etcd.io/bbolt v1.3.7 // indirect
+	go.osspkg.com/goppy/iosync v0.2.0 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
+	golang.org/x/sys v0.16.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	google.golang.org/protobuf v1.32.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
diff --git a/search/go.sum b/search/go.sum
new file mode 100644
index 0000000..559b9f2
--- /dev/null
+++ b/search/go.sum
@@ -0,0 +1,88 @@
+github.com/RoaringBitmap/roaring v1.2.3 h1:yqreLINqIrX22ErkKI0vY47/ivtJr6n+kMhVOVmhWBY=
+github.com/RoaringBitmap/roaring v1.2.3/go.mod h1:plvDsJQpxOC5bw8LRteu/MLWHsHez/3y6cubLI4/1yE=
+github.com/bits-and-blooms/bitset v1.2.0 h1:Kn4yilvwNtMACtf1eYDlG8H77R07mZSPbMjLyS07ChA=
+github.com/bits-and-blooms/bitset v1.2.0/go.mod h1:gIdJ4wp64HaoK2YrL1Q5/N7Y16edYb8uY+O0FJTyyDA=
+github.com/blevesearch/bleve/v2 v2.3.10 h1:z8V0wwGoL4rp7nG/O3qVVLYxUqCbEwskMt4iRJsPLgg=
+github.com/blevesearch/bleve/v2 v2.3.10/go.mod h1:RJzeoeHC+vNHsoLR54+crS1HmOWpnH87fL70HAUCzIA=
+github.com/blevesearch/bleve_index_api v1.0.6 h1:gyUUxdsrvmW3jVhhYdCVL6h9dCjNT/geNU7PxGn37p8=
+github.com/blevesearch/bleve_index_api v1.0.6/go.mod h1:YXMDwaXFFXwncRS8UobWs7nvo0DmusriM1nztTlj1ms=
+github.com/blevesearch/geo v0.1.18 h1:Np8jycHTZ5scFe7VEPLrDoHnnb9C4j636ue/CGrhtDw=
+github.com/blevesearch/geo v0.1.18/go.mod h1:uRMGWG0HJYfWfFJpK3zTdnnr1K+ksZTuWKhXeSokfnM=
+github.com/blevesearch/go-porterstemmer v1.0.3 h1:GtmsqID0aZdCSNiY8SkuPJ12pD4jI+DdXTAn4YRcHCo=
+github.com/blevesearch/go-porterstemmer v1.0.3/go.mod h1:angGc5Ht+k2xhJdZi511LtmxuEf0OVpvUUNrwmM1P7M=
+github.com/blevesearch/gtreap v0.1.1 h1:2JWigFrzDMR+42WGIN/V2p0cUvn4UP3C4Q5nmaZGW8Y=
+github.com/blevesearch/gtreap v0.1.1/go.mod h1:QaQyDRAT51sotthUWAH4Sj08awFSSWzgYICSZ3w0tYk=
+github.com/blevesearch/mmap-go v1.0.4 h1:OVhDhT5B/M1HNPpYPBKIEJaD0F3Si+CrEKULGCDPWmc=
+github.com/blevesearch/mmap-go v1.0.4/go.mod h1:EWmEAOmdAS9z/pi/+Toxu99DnsbhG1TIxUoRmJw/pSs=
+github.com/blevesearch/scorch_segment_api/v2 v2.1.6 h1:CdekX/Ob6YCYmeHzD72cKpwzBjvkOGegHOqhAkXp6yA=
+github.com/blevesearch/scorch_segment_api/v2 v2.1.6/go.mod h1:nQQYlp51XvoSVxcciBjtvuHPIVjlWrN1hX4qwK2cqdc=
+github.com/blevesearch/segment v0.9.1 h1:+dThDy+Lvgj5JMxhmOVlgFfkUtZV2kw49xax4+jTfSU=
+github.com/blevesearch/segment v0.9.1/go.mod h1:zN21iLm7+GnBHWTao9I+Au/7MBiL8pPFtJBJTsk6kQw=
+github.com/blevesearch/snowballstem v0.9.0 h1:lMQ189YspGP6sXvZQ4WZ+MLawfV8wOmPoD/iWeNXm8s=
+github.com/blevesearch/snowballstem v0.9.0/go.mod h1:PivSj3JMc8WuaFkTSRDW2SlrulNWPl4ABg1tC/hlgLs=
+github.com/blevesearch/upsidedown_store_api v1.0.2 h1:U53Q6YoWEARVLd1OYNc9kvhBMGZzVrdmaozG2MfoB+A=
+github.com/blevesearch/upsidedown_store_api v1.0.2/go.mod h1:M01mh3Gpfy56Ps/UXHjEO/knbqyQ1Oamg8If49gRwrQ=
+github.com/blevesearch/vellum v1.0.10 h1:HGPJDT2bTva12hrHepVT3rOyIKFFF4t7Gf6yMxyMIPI=
+github.com/blevesearch/vellum v1.0.10/go.mod h1:ul1oT0FhSMDIExNjIxHqJoGpVrBpKCdgDQNxfqgJt7k=
+github.com/blevesearch/zapx/v11 v11.3.10 h1:hvjgj9tZ9DeIqBCxKhi70TtSZYMdcFn7gDb71Xo/fvk=
+github.com/blevesearch/zapx/v11 v11.3.10/go.mod h1:0+gW+FaE48fNxoVtMY5ugtNHHof/PxCqh7CnhYdnMzQ=
+github.com/blevesearch/zapx/v12 v12.3.10 h1:yHfj3vXLSYmmsBleJFROXuO08mS3L1qDCdDK81jDl8s=
+github.com/blevesearch/zapx/v12 v12.3.10/go.mod h1:0yeZg6JhaGxITlsS5co73aqPtM04+ycnI6D1v0mhbCs=
+github.com/blevesearch/zapx/v13 v13.3.10 h1:0KY9tuxg06rXxOZHg3DwPJBjniSlqEgVpxIqMGahDE8=
+github.com/blevesearch/zapx/v13 v13.3.10/go.mod h1:w2wjSDQ/WBVeEIvP0fvMJZAzDwqwIEzVPnCPrz93yAk=
+github.com/blevesearch/zapx/v14 v14.3.10 h1:SG6xlsL+W6YjhX5N3aEiL/2tcWh3DO75Bnz77pSwwKU=
+github.com/blevesearch/zapx/v14 v14.3.10/go.mod h1:qqyuR0u230jN1yMmE4FIAuCxmahRQEOehF78m6oTgns=
+github.com/blevesearch/zapx/v15 v15.3.13 h1:6EkfaZiPlAxqXz0neniq35my6S48QI94W/wyhnpDHHQ=
+github.com/blevesearch/zapx/v15 v15.3.13/go.mod h1:Turk/TNRKj9es7ZpKK95PS7f6D44Y7fAFy8F4LXQtGg=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/golang/geo v0.0.0-20210211234256-740aa86cb551 h1:gtexQ/VGyN+VVFRXSFiguSNcXmS6rkKT+X7FdIrTtfo=
+github.com/golang/geo v0.0.0-20210211234256-740aa86cb551/go.mod h1:QZ0nwyI2jOfgRAoBvP+ab5aRr7c9x7lhGEJrKvBwjWI=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
+github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
+github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
+github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
+github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
+github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
+github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
+github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
+github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
+github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
+github.com/mschoch/smat v0.2.0 h1:8imxQsjDm8yFEAVBe7azKmKSgzSkZXDuKkSq9374khM=
+github.com/mschoch/smat v0.2.0/go.mod h1:kc9mz7DoBKqDyiRL7VZN8KvXQMWeTaVnttLRXOlotKw=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+go.etcd.io/bbolt v1.3.7 h1:j+zJOnnEjF/kyHlDDgGnVL/AIqIJPq8UoB2GSNfkUfQ=
+go.etcd.io/bbolt v1.3.7/go.mod h1:N9Mkw9X8x5fupy0IKsmuqVtoGDyxsaDlbk4Rd05IAQw=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.16.0 h1:xWw16ngr6ZMtmxDyKyIgsE93KNKz5HKmMa3b8ALHidU=
+golang.org/x/sys v0.16.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
+google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/search/search.go b/search/search.go
new file mode 100644
index 0000000..47a45dd
--- /dev/null
+++ b/search/search.go
@@ -0,0 +1,265 @@
+/*
+ *  Copyright (c) 2022-2024 Mikhail Knyazhev <markus621@yandex.ru>. All rights reserved.
+ *  Use of this source code is governed by a BSD 3-Clause license that can be found in the LICENSE file.
+ */
+
+package search
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"reflect"
+	"strings"
+	"time"
+
+	bleve "github.com/blevesearch/bleve/v2"
+	customAnalyzer "github.com/blevesearch/bleve/v2/analysis/analyzer/custom"
+	"github.com/blevesearch/bleve/v2/analysis/token/camelcase"
+	"github.com/blevesearch/bleve/v2/analysis/token/lowercase"
+	"github.com/blevesearch/bleve/v2/analysis/token/unicodenorm"
+	"github.com/blevesearch/bleve/v2/analysis/tokenizer/unicode"
+	"github.com/blevesearch/bleve/v2/mapping"
+	"go.osspkg.com/goppy/errors"
+	"go.osspkg.com/goppy/iofile"
+)
+
+type (
+	Searcher interface {
+		Generate() error
+		Open() error
+		Close() error
+		Add(name, id string, data interface{}) error
+		Delete(name, id string) error
+		Search(ctx context.Context, name, query string, highlight bool, result interface{}) error
+	}
+
+	serviceSearch struct {
+		conf    ConfigItem
+		indexes map[string]*indexItem
+	}
+
+	indexItem struct {
+		Index      bleve.Index
+		Fields     []string
+		FieldsType map[string]string
+	}
+)
+
+func NewSearch(c ConfigItem) Searcher {
+	return &serviceSearch{
+		conf:    c,
+		indexes: make(map[string]*indexItem, len(c.Indexes)),
+	}
+}
+
+func (v *serviceSearch) validate() error {
+	for _, index := range v.conf.Indexes {
+		if !isValidIndexName(index.Name) {
+			return fmt.Errorf("invalid index name `%s`, use chars: 0-9 a-z _", index.Name)
+		}
+		if len(index.Fields) == 0 {
+			return fmt.Errorf("index field is empty for `%s`", index.Name)
+		}
+		for _, field := range index.Fields {
+			if !isUpperCamelCase(field.Name) {
+				return fmt.Errorf("invalid index field name `%s`, use UpperCamelCase with char: A-Z a-z", field.Name)
+			}
+			switch field.Type {
+			case FieldText, FieldDate:
+				continue
+			default:
+				return fmt.Errorf("invalid index field type `%s`, use text or date", field.Name)
+			}
+		}
+	}
+	return nil
+}
+
+func (v *serviceSearch) Generate() error {
+	if err := v.validate(); err != nil {
+		return err
+	}
+
+	for _, conf := range v.conf.Indexes {
+		folderPath := v.conf.Folder + "/" + conf.Name
+		if iofile.Exist(folderPath + indexFilename) {
+			continue
+		}
+		docMapping := bleve.NewDocumentMapping()
+		for _, field := range conf.Fields {
+			var fieldMapping *mapping.FieldMapping
+			switch field.Type {
+			case FieldText:
+				fieldMapping = bleve.NewTextFieldMapping()
+			case FieldDate:
+				fieldMapping = bleve.NewDateTimeFieldMapping()
+				fieldMapping.Index = false
+				fieldMapping.IncludeTermVectors = false
+			default:
+				return fmt.Errorf("invalid field type `%s`", field.Name)
+			}
+			fieldMapping.IncludeInAll = false
+			docMapping.AddFieldMappingsAt(field.Name, fieldMapping)
+		}
+		indexMapping := bleve.NewIndexMapping()
+		if err := indexMapping.AddCustomTokenFilter(customFilterName, map[string]any{
+			"type": unicodenorm.Name,
+			"form": unicodenorm.NFC,
+		}); err != nil {
+			return err
+		}
+		if err := indexMapping.AddCustomAnalyzer(customAnalyzerName, map[string]any{
+			"type":          customAnalyzer.Name,
+			"char_filters":  []string{},
+			"tokenizer":     unicode.Name,
+			"token_filters": []string{customFilterName, camelcase.Name, lowercase.Name},
+		}); err != nil {
+			return err
+		}
+		indexMapping.AddDocumentMapping(customAnalyzerName, docMapping)
+		indexMapping.AddDocumentMapping("_all", bleve.NewDocumentDisabledMapping())
+
+		if err := os.MkdirAll(folderPath, 0777); err != nil {
+			return err
+		}
+		bleveindex, err := bleve.New(folderPath, indexMapping)
+		if err != nil {
+			return err
+		}
+		if err = bleveindex.Close(); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (v *serviceSearch) Open() error {
+	if err := v.validate(); err != nil {
+		return err
+	}
+
+	for _, conf := range v.conf.Indexes {
+		folderPath := v.conf.Folder + "/" + conf.Name
+		if !iofile.Exist(folderPath + indexFilename) {
+			return errors.Wrap(
+				fmt.Errorf("index not found `%s`", conf.Name),
+				v.Close(),
+			)
+		}
+		index, err := bleve.Open(folderPath)
+		if err != nil {
+			return errors.Wrap(
+				fmt.Errorf("index open `%s`: %w", conf.Name, err),
+				v.Close(),
+			)
+		}
+		fields := make([]string, 0, len(conf.Fields))
+		fieldsType := make(map[string]string, len(conf.Fields))
+		for _, field := range conf.Fields {
+			fields = append(fields, field.Name)
+			fieldsType[field.Name] = field.Type
+		}
+		v.indexes[conf.Name] = &indexItem{
+			Index:      index,
+			Fields:     fields,
+			FieldsType: fieldsType,
+		}
+	}
+
+	return nil
+}
+
+func (v *serviceSearch) Close() error {
+	var err error
+	for _, conf := range v.conf.Indexes {
+		indx, ok := v.indexes[conf.Name]
+		if !ok {
+			continue
+		}
+		delete(v.indexes, conf.Name)
+		err = errors.Wrap(indx.Index.Close())
+	}
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (v *serviceSearch) Add(name, id string, data interface{}) error {
+	indx, ok := v.indexes[name]
+	if !ok {
+		return fmt.Errorf("index not found: %s", name)
+	}
+	return indx.Index.Index(id, data)
+}
+
+func (v *serviceSearch) Delete(name, id string) error {
+	indx, ok := v.indexes[name]
+	if !ok {
+		return fmt.Errorf("index not found: %s", name)
+	}
+	return indx.Index.Delete(id)
+}
+
+// nolint: gocyclo
+func (v *serviceSearch) Search(ctx context.Context, name, query string, highlight bool, result interface{}) error {
+	indx, ok := v.indexes[name]
+	if !ok {
+		return fmt.Errorf("index not found: %s", name)
+	}
+	rv := reflect.ValueOf(result)
+	if rv.Kind() != reflect.Pointer || rv.IsNil() {
+		return fmt.Errorf("result parameter is non-pointer %T", result)
+	}
+	if rv.Elem().Kind() != reflect.Slice {
+		return fmt.Errorf("result parameter is not pointer of slice")
+	}
+	re := rv.Elem().Type().Elem()
+	if re.Kind() != reflect.Struct {
+		return fmt.Errorf("result parameter must have struct of slice")
+	}
+	request := bleve.NewSearchRequestOptions(bleve.NewQueryStringQuery(query), rv.Elem().Cap(), 0, false)
+	request.Fields = append(request.Fields, indx.Fields...)
+	request.IncludeLocations = true
+	if highlight {
+		request.Highlight = bleve.NewHighlight()
+	}
+	searchResult, err := indx.Index.SearchInContext(ctx, request)
+	if err != nil {
+		return err
+	}
+	if searchResult.Total == 0 {
+		return nil
+	}
+	for _, hit := range searchResult.Hits {
+		obj := reflect.New(re)
+		obj.Elem().FieldByName(structScoreField).Set(reflect.ValueOf(hit.Score))
+		for key, value := range hit.Fields {
+			t, ok := indx.FieldsType[key]
+			if !ok {
+				continue
+			}
+			switch t {
+			case FieldText:
+				if highlight {
+					if vv, ok := hit.Fragments[key]; ok {
+						value = strings.Join(vv, "")
+					}
+				}
+				obj.Elem().FieldByName(key).Set(reflect.ValueOf(value))
+			case FieldDate:
+				tv, err := time.Parse(time.RFC3339, value.(string))
+				if err != nil {
+					return err
+				}
+				obj.Elem().FieldByName(key).Set(reflect.ValueOf(tv))
+			default:
+			}
+
+		}
+		rv.Elem().Set(reflect.Append(rv.Elem(), obj.Elem()))
+	}
+	return nil
+}
diff --git a/search/search_test.go b/search/search_test.go
new file mode 100644
index 0000000..cf7a45c
--- /dev/null
+++ b/search/search_test.go
@@ -0,0 +1,71 @@
+/*
+ *  Copyright (c) 2022-2024 Mikhail Knyazhev <markus621@yandex.ru>. All rights reserved.
+ *  Use of this source code is governed by a BSD 3-Clause license that can be found in the LICENSE file.
+ */
+
+package search_test
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"testing"
+	"time"
+
+	"go.osspkg.com/goppy/search"
+	"go.osspkg.com/goppy/xtest"
+)
+
+type TestData struct {
+	Line      string
+	Data      string
+	CreatedAt time.Time
+}
+
+type TestDataSearch struct {
+	Score     float64
+	Line      string
+	Data      string
+	CreatedAt time.Time
+}
+
+func TestUnit_NewSearch(t *testing.T) {
+	conf := search.ConfigItem{
+		Folder: "/tmp/TestUnit_NewSearch",
+		Indexes: []search.ConfigIndex{
+			{Name: "demo", Fields: []search.ConfigIndexField{
+				{Name: "Line", Type: "text"},
+				{Name: "Data", Type: "text"},
+				{Name: "CreatedAt", Type: "date"},
+			}},
+		},
+	}
+
+	srv := search.NewSearch(conf)
+
+	xtest.NoError(t, srv.Generate())
+	xtest.NoError(t, srv.Open())
+	defer func() {
+		xtest.NoError(t, os.RemoveAll(conf.Folder))
+	}()
+	xtest.NoError(t, srv.Add("demo", "001", TestData{
+		Line:      "1",
+		Data:      "Hello world",
+		CreatedAt: time.Now(),
+	}))
+	xtest.NoError(t, srv.Add("demo", "002", TestData{
+		Line:      "2",
+		Data:      "Happy world",
+		CreatedAt: time.Now(),
+	}))
+	result := make([]TestDataSearch, 0, 10)
+	//xtest.NoError(t, srv.Search("demo", "h* worl*", &result))
+	xtest.NoError(t, srv.Search(context.TODO(), "demo", "Hello world", true, &result))
+	fmt.Println(result)
+	xtest.True(t, len(result) == 2)
+	xtest.NoError(t, srv.Delete("demo", "002"))
+	result = make([]TestDataSearch, 0, 10)
+	xtest.NoError(t, srv.Search(context.TODO(), "demo", "h* worl*", true, &result))
+	xtest.True(t, len(result) == 1)
+	xtest.NoError(t, srv.Close())
+}
diff --git a/search/utils.go b/search/utils.go
new file mode 100644
index 0000000..2ff9c8f
--- /dev/null
+++ b/search/utils.go
@@ -0,0 +1,21 @@
+/*
+ *  Copyright (c) 2022-2024 Mikhail Knyazhev <markus621@yandex.ru>. All rights reserved.
+ *  Use of this source code is governed by a BSD 3-Clause license that can be found in the LICENSE file.
+ */
+
+package search
+
+import "regexp"
+
+var (
+	rexIndexName      = regexp.MustCompile(`^[a-z0-9\_]+$`)
+	rexUpperCamelCase = regexp.MustCompile(`^[A-Z][A-Za-z0-9]+$`)
+)
+
+func isValidIndexName(v string) bool {
+	return rexIndexName.MatchString(v)
+}
+
+func isUpperCamelCase(v string) bool {
+	return rexUpperCamelCase.MatchString(v)
+}
diff --git a/search/utils_test.go b/search/utils_test.go
new file mode 100644
index 0000000..43d609b
--- /dev/null
+++ b/search/utils_test.go
@@ -0,0 +1,27 @@
+/*
+ *  Copyright (c) 2022-2024 Mikhail Knyazhev <markus621@yandex.ru>. All rights reserved.
+ *  Use of this source code is governed by a BSD 3-Clause license that can be found in the LICENSE file.
+ */
+
+package search
+
+import "testing"
+
+func TestUnit_isValidIndexName(t *testing.T) {
+	tests := []struct {
+		name string
+		arg  string
+		want bool
+	}{
+		{name: "Case1", arg: "Aaaa", want: false},
+		{name: "Case2", arg: "0-aaa", want: false},
+		{name: "Case3", arg: "123_aaa", want: true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := isValidIndexName(tt.arg); got != tt.want {
+				t.Errorf("isValidIndexName() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
diff --git a/shell/go.mod b/shell/go.mod
index 8201211..41b60d2 100644
--- a/shell/go.mod
+++ b/shell/go.mod
@@ -1,12 +1,12 @@
 module go.osspkg.com/goppy/shell
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
 	go.osspkg.com/goppy/syscall => ../syscall
 )
 
-require go.osspkg.com/goppy/errors v0.1.2
+require go.osspkg.com/goppy/errors v0.2.0
 
-require go.osspkg.com/goppy/syscall v0.1.3 // indirect
+require go.osspkg.com/goppy/syscall v0.2.0 // indirect
diff --git a/sip/go.mod b/sip/go.mod
index 2ab2804..f3b3623 100644
--- a/sip/go.mod
+++ b/sip/go.mod
@@ -1,3 +1,3 @@
 module go.osspkg.com/goppy/sip
 
-go 1.18
+go 1.20
diff --git a/sqlcommon/go.mod b/sqlcommon/go.mod
index 1091d8d..676efd0 100644
--- a/sqlcommon/go.mod
+++ b/sqlcommon/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/sqlcommon
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -11,14 +11,14 @@ replace (
 )
 
 require (
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/xlog v0.1.7
-	go.osspkg.com/goppy/xtest v0.1.4
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
+	go.osspkg.com/goppy/xtest v0.2.0
 )
 
 require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
-	go.osspkg.com/goppy/iosync v0.1.5 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
+	go.osspkg.com/goppy/iosync v0.2.0 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
 )
diff --git a/syscall/go.mod b/syscall/go.mod
index 4d76262..d3eb178 100644
--- a/syscall/go.mod
+++ b/syscall/go.mod
@@ -1,3 +1,3 @@
 module go.osspkg.com/goppy/syscall
 
-go 1.18
+go 1.20
diff --git a/tcp/go.mod b/tcp/go.mod
index b4492e4..6f89e86 100644
--- a/tcp/go.mod
+++ b/tcp/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/tcp
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -15,18 +15,18 @@ replace (
 )
 
 require (
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/iosync v0.1.5
-	go.osspkg.com/goppy/ioutil v0.1.3
-	go.osspkg.com/goppy/plugins v0.1.2
-	go.osspkg.com/goppy/random v0.1.2
-	go.osspkg.com/goppy/xc v0.1.1
-	go.osspkg.com/goppy/xlog v0.1.7
-	go.osspkg.com/goppy/xnet v0.1.3
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/iosync v0.2.0
+	go.osspkg.com/goppy/ioutil v0.2.0
+	go.osspkg.com/goppy/plugins v0.2.0
+	go.osspkg.com/goppy/random v0.2.0
+	go.osspkg.com/goppy/xc v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
+	go.osspkg.com/goppy/xnet v0.2.0
 )
 
 require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
 )
diff --git a/udp/go.mod b/udp/go.mod
index c701edc..326057b 100644
--- a/udp/go.mod
+++ b/udp/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/udp
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -13,15 +13,15 @@ replace (
 )
 
 require (
-	go.osspkg.com/goppy/iosync v0.1.5
-	go.osspkg.com/goppy/xc v0.1.1
-	go.osspkg.com/goppy/xlog v0.1.7
-	go.osspkg.com/goppy/xnet v0.1.3
+	go.osspkg.com/goppy/iosync v0.2.0
+	go.osspkg.com/goppy/xc v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
+	go.osspkg.com/goppy/xnet v0.2.0
 )
 
 require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
-	go.osspkg.com/goppy/errors v0.1.2 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
+	go.osspkg.com/goppy/errors v0.2.0 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
 )
diff --git a/unixsocket/go.mod b/unixsocket/go.mod
index 6e2a488..f949cbc 100644
--- a/unixsocket/go.mod
+++ b/unixsocket/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/unixsocket
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -14,16 +14,16 @@ replace (
 )
 
 require (
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/iosync v0.1.5
-	go.osspkg.com/goppy/ioutil v0.1.3
-	go.osspkg.com/goppy/plugins v0.1.2
-	go.osspkg.com/goppy/xc v0.1.1
-	go.osspkg.com/goppy/xlog v0.1.7
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/iosync v0.2.0
+	go.osspkg.com/goppy/ioutil v0.2.0
+	go.osspkg.com/goppy/plugins v0.2.0
+	go.osspkg.com/goppy/xc v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
 )
 
 require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
 )
diff --git a/version/go.mod b/version/go.mod
index 09155d7..7b36831 100644
--- a/version/go.mod
+++ b/version/go.mod
@@ -1,3 +1,3 @@
 module go.osspkg.com/goppy/version
 
-go 1.18
+go 1.20
diff --git a/web/go.mod b/web/go.mod
index 3807db2..15ace5a 100644
--- a/web/go.mod
+++ b/web/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/web
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -16,18 +16,18 @@ replace (
 
 require (
 	github.com/mailru/easyjson v0.7.7
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/iosync v0.1.5
-	go.osspkg.com/goppy/ioutil v0.1.3
-	go.osspkg.com/goppy/plugins v0.1.2
-	go.osspkg.com/goppy/xc v0.1.1
-	go.osspkg.com/goppy/xlog v0.1.7
-	go.osspkg.com/goppy/xnet v0.1.3
-	go.osspkg.com/goppy/xtest v0.1.4
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/iosync v0.2.0
+	go.osspkg.com/goppy/ioutil v0.2.0
+	go.osspkg.com/goppy/plugins v0.2.0
+	go.osspkg.com/goppy/xc v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
+	go.osspkg.com/goppy/xnet v0.2.0
+	go.osspkg.com/goppy/xtest v0.2.0
 	go.osspkg.com/static v1.4.0
 )
 
 require (
 	github.com/josharian/intern v1.0.0 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
 )
diff --git a/ws/go.mod b/ws/go.mod
index 6a96d9b..15e6b36 100644
--- a/ws/go.mod
+++ b/ws/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/ws
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -15,16 +15,16 @@ replace (
 require (
 	github.com/gorilla/websocket v1.5.1
 	github.com/mailru/easyjson v0.7.7
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/iosync v0.1.5
-	go.osspkg.com/goppy/plugins v0.1.2
-	go.osspkg.com/goppy/xc v0.1.1
-	go.osspkg.com/goppy/xlog v0.1.7
-	go.osspkg.com/goppy/xtest v0.1.4
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/iosync v0.2.0
+	go.osspkg.com/goppy/plugins v0.2.0
+	go.osspkg.com/goppy/xc v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
+	go.osspkg.com/goppy/xtest v0.2.0
 )
 
 require (
 	github.com/josharian/intern v1.0.0 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
 	golang.org/x/net v0.20.0 // indirect
 )
diff --git a/xc/go.mod b/xc/go.mod
index 37ab6c2..83cd45c 100644
--- a/xc/go.mod
+++ b/xc/go.mod
@@ -1,3 +1,3 @@
 module go.osspkg.com/goppy/xc
 
-go 1.18
+go 1.20
diff --git a/xdns/go.mod b/xdns/go.mod
index d94eac9..c50ea43 100644
--- a/xdns/go.mod
+++ b/xdns/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/xdns
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
@@ -14,18 +14,18 @@ replace (
 
 require (
 	github.com/miekg/dns v1.1.57
-	go.osspkg.com/goppy/errors v0.1.2
-	go.osspkg.com/goppy/iosync v0.1.5
-	go.osspkg.com/goppy/plugins v0.1.2
-	go.osspkg.com/goppy/xc v0.1.1
-	go.osspkg.com/goppy/xlog v0.1.7
-	go.osspkg.com/goppy/xnet v0.1.3
+	go.osspkg.com/goppy/errors v0.2.0
+	go.osspkg.com/goppy/iosync v0.2.0
+	go.osspkg.com/goppy/plugins v0.2.0
+	go.osspkg.com/goppy/xc v0.2.0
+	go.osspkg.com/goppy/xlog v0.2.0
+	go.osspkg.com/goppy/xnet v0.2.0
 )
 
 require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
-	go.osspkg.com/goppy/syscall v0.1.3 // indirect
+	go.osspkg.com/goppy/syscall v0.2.0 // indirect
 	golang.org/x/mod v0.12.0 // indirect
 	golang.org/x/net v0.20.0 // indirect
 	golang.org/x/sys v0.16.0 // indirect
diff --git a/xlog/go.mod b/xlog/go.mod
index afb32fd..6df6619 100644
--- a/xlog/go.mod
+++ b/xlog/go.mod
@@ -1,6 +1,6 @@
 module go.osspkg.com/goppy/xlog
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/iosync => ../iosync
@@ -9,8 +9,8 @@ replace (
 
 require (
 	github.com/mailru/easyjson v0.7.7
-	go.osspkg.com/goppy/iosync v0.1.5
-	go.osspkg.com/goppy/xtest v0.1.4
+	go.osspkg.com/goppy/iosync v0.2.0
+	go.osspkg.com/goppy/xtest v0.2.0
 )
 
 require github.com/josharian/intern v1.0.0 // indirect
diff --git a/xnet/go.mod b/xnet/go.mod
index 01de161..a9be91e 100644
--- a/xnet/go.mod
+++ b/xnet/go.mod
@@ -1,12 +1,12 @@
 module go.osspkg.com/goppy/xnet
 
-go 1.18
+go 1.20
 
 replace (
 	go.osspkg.com/goppy/errors => ../errors
 	go.osspkg.com/goppy/syscall => ../syscall
 )
 
-require go.osspkg.com/goppy/errors v0.1.2
+require go.osspkg.com/goppy/errors v0.2.0
 
-require go.osspkg.com/goppy/syscall v0.1.3 // indirect
+require go.osspkg.com/goppy/syscall v0.2.0 // indirect
diff --git a/xtest/go.mod b/xtest/go.mod
index 326d6b9..201850e 100644
--- a/xtest/go.mod
+++ b/xtest/go.mod
@@ -1,3 +1,3 @@
 module go.osspkg.com/goppy/xtest
 
-go 1.18
+go 1.20