Repository: oom-ai/oomstore
Pull request #856 (2021-12-30 02:52:12)

Jinghan/implement offline method `Snapshot`
This PR implements offline method `Snapshot`, which aggregates the previous snapshot and current cdc table, generates a new snapshot table.

related to #805 


Patch:
diff --git a/README.md b/README.md
index c802432b..54d7229f 100644
--- a/README.md
+++ b/README.md
@@ -37,11 +37,8 @@ You can interact with oomstore with CLI, Go API or Python API. See [Architecture
 Compared to other feature store implementations, oomstore has its edges:
 
 - Fast. Benchmark shows oomstore performs QPS > 50k and latency < 0.3 ms using Redis as the Online Store. For more details, see [benchmark](https://oom.ai/docs/benchmark).
-- Pluggable. We support a wide range of databases already (see below), and there are more to come.
-  - Online Store: DynamoDB, Redis, TiKV, Cassandra, TiDB, PostgreSQL, MySQL, SQLite.
-  - Offline Store: Snowflake, Redshift, BigQuery, TiDB, PostgreSQL, MySQL, SQLite.
-  - Metadata Store: TiDB, PostgreSQL, MySQL, SQLite.
-- Simple. In the minimal, oomstore can run aganist a single MySQL/PostgreSQL database. This helps get started quickly, and you can always switch to a different database later without having to rewrite your code.
+- Pluggable. We support a wide range of databases: PostgreSQL and Redis for Online Store, PostgreSQL for Metadata Store, and PostgreSQL for Offline Store. There are more to come, and you can easily add!
+- Simple. In the minimal, oomstore can run aganist a PostgreSQL database. This helps get started quickly, and you can always switch to a different database later without having to rewrite your code.
 
 ## Quickstart
 
diff --git a/go.sum b/go.sum
index 00fb62f7..54a8ba74 100644
--- a/go.sum
+++ b/go.sum
@@ -24,7 +24,6 @@ cloud.google.com/go v0.87.0/go.mod h1:TpDYlFy7vuLzZMMZ+B6iRiELaY7z/gJPaqbMx6mlWc
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-cloud.google.com/go v0.97.0 h1:3DXvAyifywvq64LfkKaMOmkWPS1CikIQdMe2lY9vxU8=
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@@ -41,7 +40,6 @@ cloud.google.com/go/datacatalog v1.0.0 h1:KHjIs525XbESSGHxwEKHTzkwfvj7xxYrCy4gcv
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@@ -94,7 +92,6 @@ github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk5
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@@ -107,36 +104,23 @@ github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj
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@@ -230,12 +195,12 @@ github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWH
 github.com/cncf/xds/go v0.0.0-20210805033703-aa0b78936158/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
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-github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1 h1:zH8ljVhhq7yC0MIeUL/IviMtY8hx2mK8cN9wEYb8ggw=
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@@ -244,7 +209,6 @@ github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3Ee
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-github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e h1:Wf6HqHfScWJN9/ZjdUKyjop4mf3Qdd+1TvvltAvM3m8=
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@@ -282,11 +246,9 @@ github.com/envoyproxy/go-control-plane v0.9.7/go.mod h1:cwu0lG7PUMfa9snN8LXBig5y
 github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
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-github.com/envoyproxy/protoc-gen-validate v0.1.0 h1:EQciDnbrYxy13PgWoY8AqoxGiPrpgBZ1R8UNe3ddc+A=
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@@ -301,10 +263,9 @@ github.com/form3tech-oss/jwt-go v3.2.2+incompatible/go.mod h1:pbq4aXjuKjdthFRnoD
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-github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
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-github.com/gabriel-vasile/mimetype v1.3.1/go.mod h1:fA8fi6KUiG7MgQQ+mEWotXoEOvmxRtOJlERCzSmRvr8=
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@@ -357,8 +318,6 @@ github.com/go-sql-driver/mysql v1.6.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LB
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-github.com/gocql/gocql v0.0.0-20210817081954-bc256bbb90de h1:J7nwGjNyfkF+hTmpFPp/nvQrfQ2i19/7yWNb8c4YNnI=
-github.com/gocql/gocql v0.0.0-20210817081954-bc256bbb90de/go.mod h1:3gM2c4D3AnkISwBxGnMMsS8Oy4y2lhbPRsH4xnJrHG8=
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@@ -374,7 +333,6 @@ github.com/golang/groupcache v0.0.0-20160516000752-02826c3e7903/go.mod h1:cIg4er
 github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
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-github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e h1:1r7pUrabqp18hOBcwBwiTsbnFeTZHV9eER/QT5JVZxY=
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@@ -413,11 +371,9 @@ github.com/golang/snappy v0.0.3/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEW
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-github.com/google/btree v1.0.0 h1:0udJVsspx3VBr5FwtLhQQtuAsVc79tTq0ocGIPAU6qo=
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-github.com/google/flatbuffers v2.0.0+incompatible h1:dicJ2oXwypfwUGnB2/TYWYEKiuk9eYQlQO/AnOHl5mI=
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@@ -469,7 +425,6 @@ github.com/googleapis/gax-go/v2 v2.0.5/go.mod h1:DWXyrwAJ9X0FpwwEdw+IPEYBICEFu5m
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-github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
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@@ -477,7 +432,6 @@ github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH
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@@ -491,9 +445,7 @@ github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFb
 github.com/gtank/cryptopasta v0.0.0-20170601214702-1f550f6f2f69/go.mod h1:YLEMZOtU+AZ7dhN9T/IpGhXVGly2bvkJQ+zxj3WeVQo=
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-github.com/hashicorp/consul/api v1.1.0/go.mod h1:VmuI/Lkw1nC05EYQWNKwWGbkg+FbDBtguAZLlVdkD9Q=
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-github.com/hashicorp/consul/sdk v0.1.1/go.mod h1:VKf9jXwCTEY1QZP2MOLRhb5i/I/ssyNV1vwHyQBF0x8=
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@@ -507,25 +459,20 @@ github.com/hashicorp/go-msgpack v0.5.3/go.mod h1:ahLV/dePpqEmjfWmKiqvPkv/twdG7iP
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-github.com/hashicorp/go-rootcerts v1.0.0/go.mod h1:K6zTfqpRlCUIjkwsN4Z+hiSfzSTQa6eBIzfwKfwNnHU=
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-github.com/hashicorp/go.net v0.0.1/go.mod h1:hjKkEWcCURg++eb33jQU7oqQcI9XDCnUzHA0oac0k90=
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-github.com/hashicorp/mdns v1.0.0/go.mod h1:tL+uN++7HEJ6SQLQ2/p+z2pH24WQKWjBPkE0mNTz8vQ=
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-github.com/hashicorp/memberlist v0.1.3/go.mod h1:ajVTdAv/9Im8oMAAj5G31PhhMCZJV2pPBoIllUwCN7I=
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-github.com/hashicorp/serf v0.8.2/go.mod h1:6hOLApaqBFA1NXqRQAsxw9QxuDEvNxSQRwA/JwenrHc=
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@@ -557,13 +504,11 @@ github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCV
 github.com/json-iterator/go v1.1.7/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
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-github.com/json-iterator/go v1.1.11 h1:uVUAXhF2To8cbw/3xN3pxj6kk7TYKs98NIrTqPlMWAQ=
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-github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
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@@ -575,7 +520,6 @@ github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQL
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
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-github.com/klauspost/compress v1.13.4/go.mod h1:8dP1Hq4DHOhN9w426knH3Rhby4rFm6D8eO+e+Dq5Gzg=
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 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
@@ -624,7 +568,6 @@ github.com/mattn/go-runewidth v0.0.13 h1:lTGmDsbAYt5DmK6OnoV7EuIF1wEIFAcxld6ypU4
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-github.com/mattn/go-sqlite3 v1.14.6 h1:dNPt6NO46WmLVt2DLNpwczCmdV5boIZ6g/tlDrlRUbg=
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@@ -636,25 +579,17 @@ github.com/miekg/dns v1.0.14/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3N
 github.com/miekg/dns v1.1.26/go.mod h1:bPDLeHnStXmXAq1m/Ch/hvfNHr14JKNPMBo3VZKjuso=
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-github.com/mitchellh/cli v1.0.0/go.mod h1:hNIlj7HEI86fIcpObd7a0FcrxTWetlwJDGcceTlRvqc=
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-github.com/mitchellh/go-homedir v1.0.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
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-github.com/mitchellh/mapstructure v1.4.1/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
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 github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
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@@ -683,7 +618,6 @@ github.com/onsi/gomega v1.7.1/go.mod h1:XdKZgCCFLUoM/7CFJVPcG8C1xQ1AJ0vpAezJrB7J
 github.com/onsi/gomega v1.10.1/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1ybHNo=
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@@ -692,7 +626,6 @@ github.com/pascaldekloe/goe v0.1.0/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144T
 github.com/pascaldekloe/name v0.0.0-20180628100202-0fd16699aae1/go.mod h1:eD5JxqMiuNYyFNmyY9rkJ/slN8y59oEu4Ei7F8OoKWQ=
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@@ -717,7 +650,6 @@ github.com/pingcap/errors v0.11.5-0.20201126102027-b0a155152ca3 h1:LllgC9eGfqzkf
 github.com/pingcap/errors v0.11.5-0.20201126102027-b0a155152ca3/go.mod h1:G7x87le1poQzLB/TqvTJI2ILrSgobnq4Ut7luOwvfvI=
 github.com/pingcap/failpoint v0.0.0-20191029060244-12f4ac2fd11d/go.mod h1:DNS3Qg7bEDhU6EXNHF+XSv/PGznQaMJ5FWvctpm6pQI=
 github.com/pingcap/failpoint v0.0.0-20200702092429-9f69995143ce/go.mod h1:w4PEZ5y16LeofeeGwdgZB4ddv9bLyDuIX+ljstgKZyk=
-github.com/pingcap/failpoint v0.0.0-20210316064728-7acb0f0a3dfd h1:I8IeI8MNiZVKnwuXhcIIzz6pREcOSbq18Q31KYIzFVM=
 github.com/pingcap/failpoint v0.0.0-20210316064728-7acb0f0a3dfd/go.mod h1:IVF+ijPSMZVtx2oIqxAg7ur6EyixtTYfOHwpfmlhqI4=
 github.com/pingcap/failpoint v0.0.0-20210918120811-547c13e3eb00 h1:C3N3itkduZXDZFh4N3vQ5HEtld3S+Y+StULhWVvumU0=
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@@ -726,21 +658,18 @@ github.com/pingcap/goleveldb v0.0.0-20191226122134-f82aafb29989/go.mod h1:O17Xtb
 github.com/pingcap/kvproto v0.0.0-20191211054548-3c6b38ea5107/go.mod h1:WWLmULLO7l8IOcQG+t+ItJ3fEcrL5FxF0Wu+HrMy26w=
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 github.com/pingcap/kvproto v0.0.0-20210819164333-bd5706b9d9f2/go.mod h1:IOdRDPLyda8GX2hE/jO7gqaCV/PNFh8BZQCQZXfIOqI=
-github.com/pingcap/kvproto v0.0.0-20211122024046-03abd340988f h1:hjInxK1Ie6CYx7Jy2pYnBdEnWI8jIfr423l9Yh6LRy8=
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 github.com/pingcap/kvproto v0.0.0-20211229082925-7a8280c36daf h1:GZ9It5l204D8wqaS4DCW5sDysiqfTOAd9LBorY5qGHI=
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 github.com/pingcap/log v0.0.0-20191012051959-b742a5d432e9/go.mod h1:4rbK1p9ILyIfb6hU7OG2CiWSqMXnp3JMbiaVJ6mvoY8=
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-github.com/pingcap/log v0.0.0-20210625125904-98ed8e2eb1c7 h1:k2BbABz9+TNpYRwsCCFS8pEEnFVOdbgEjL/kTlLuzZQ=
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 github.com/pingcap/sysutil v0.0.0-20210730114356-fcd8a63f68c5/go.mod h1:XsOaV712rUk63aOEKYP9PhXTIE3FMNHmC2r1wX5wElY=
 github.com/pingcap/tidb-dashboard v0.0.0-20211008050453-a25c25809529/go.mod h1:OCXbZTBTIMRcIt0jFsuCakZP+goYRv6IjawKbwLS2TQ=
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 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@@ -757,7 +686,6 @@ github.com/prometheus/client_golang v0.9.3/go.mod h1:/TN21ttK/J9q6uSwhBd54HahCDf
 github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo=
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-github.com/prometheus/client_golang v1.5.1 h1:bdHYieyGlH+6OLEk2YQha8THib30KP0/yD0YH9m6xcA=
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 github.com/prometheus/client_golang v1.11.0 h1:HNkLOAEQMIDv/K+04rukrLx6ch7msSRwf3/SASFAGtQ=
@@ -771,7 +699,6 @@ github.com/prometheus/common v0.0.0-20181113130724-41aa239b4cce/go.mod h1:daVV7q
 github.com/prometheus/common v0.4.0/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
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-github.com/prometheus/common v0.9.1 h1:KOMtN28tlbam3/7ZKEYKHhKoJZYYj3gMH4uc62x7X7U=
 github.com/prometheus/common v0.9.1/go.mod h1:yhUN8i9wzaXS3w1O07YhxHEBxD+W35wd8bs7vj7HSQ4=
 github.com/prometheus/common v0.10.0/go.mod h1:Tlit/dnDKsSWFlCLTWaA1cyBgKHSMdTB80sz/V91rCo=
 github.com/prometheus/common v0.26.0/go.mod h1:M7rCNAaPfAosfx8veZJCuw84e35h3Cfd9VFqTh1DIvc=
@@ -782,7 +709,6 @@ github.com/prometheus/procfs v0.0.0-20190507164030-5867b95ac084/go.mod h1:TjEm7z
 github.com/prometheus/procfs v0.0.2/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/prometheus/procfs v0.0.3/go.mod h1:4A/X28fw3Fc593LaREMrKMqOKvUAntwMDaekg4FpcdQ=
 github.com/prometheus/procfs v0.0.5/go.mod h1:4A/X28fw3Fc593LaREMrKMqOKvUAntwMDaekg4FpcdQ=
-github.com/prometheus/procfs v0.0.8 h1:+fpWZdT24pJBiqJdAwYBjPSk+5YmQzYNPYzQsdzLkt8=
 github.com/prometheus/procfs v0.0.8/go.mod h1:7Qr8sr6344vo1JqZ6HhLceV9o3AJ1Ff+GxbHq6oeK9A=
 github.com/prometheus/procfs v0.1.3/go.mod h1:lV6e/gmhEcM9IjHGsFOCxxuZ+z1YqCvr4OA4YeYWdaU=
 github.com/prometheus/procfs v0.6.0/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
@@ -817,10 +743,6 @@ github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6Mwd
 github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
 github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
 github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
-github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
-github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
-github.com/snowflakedb/gosnowflake v1.6.4 h1:yZSk/85ReT7iEOkkbFdlMCH/mQ16nU2+QgJe8aBaXRg=
-github.com/snowflakedb/gosnowflake v1.6.4/go.mod h1:6hLajn6yxuJ4xUHZegMekpq9rnQbGJ7TMwXjgTmA6lg=
 github.com/snowflakedb/gosnowflake v1.6.5 h1:z7WfTtHly52GBX0VXVrelU285oiDKj/r3nTJ++YCK9o=
 github.com/snowflakedb/gosnowflake v1.6.5/go.mod h1:eK8Ei6XQfWlpRkK3+ZT1OFH82Qhz0TNyC+zioKqVrKA=
 github.com/soheilhy/cmux v0.1.4 h1:0HKaf1o97UwFjHH9o5XsHUOF+tqmdA7KEzXLpiyaw0E=
@@ -830,13 +752,10 @@ github.com/spf13/afero v1.1.2/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B
 github.com/spf13/afero v1.3.3/go.mod h1:5KUK8ByomD5Ti5Artl0RtHeI5pTF7MIDuXL3yY520V4=
 github.com/spf13/afero v1.6.0/go.mod h1:Ai8FlHk4v/PARR026UzYexafAt9roJ7LcLMAmO6Z93I=
 github.com/spf13/cast v1.3.0/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
-github.com/spf13/cast v1.3.1/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
 github.com/spf13/cast v1.4.1 h1:s0hze+J0196ZfEMTs80N7UlFt0BDuQ7Q+JDnHiMWKdA=
 github.com/spf13/cast v1.4.1/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
 github.com/spf13/cobra v0.0.3/go.mod h1:1l0Ry5zgKvJasoi3XT1TypsSe7PqH0Sj9dhYf7v3XqQ=
 github.com/spf13/cobra v1.0.0/go.mod h1:/6GTrnGXV9HjY+aR4k0oJ5tcvakLuG6EuKReYlHNrgE=
-github.com/spf13/cobra v1.2.1 h1:+KmjbUw1hriSNMF55oPrkZcb27aECyrj8V2ytv7kWDw=
-github.com/spf13/cobra v1.2.1/go.mod h1:ExllRjgxM/piMAM+3tAZvg8fsklGAf3tPfi+i8t68Nk=
 github.com/spf13/cobra v1.3.0 h1:R7cSvGu+Vv+qX0gW5R/85dx2kmmJT5z5NM8ifdYjdn0=
 github.com/spf13/cobra v1.3.0/go.mod h1:BrRVncBjOJa/eUcVVm9CE+oC6as8k+VYr4NY7WCi9V4=
 github.com/spf13/jwalterweatherman v1.0.0/go.mod h1:cQK4TGJAtQXfYWX+Ddv3mKDzgVb68N+wFjFa4jdeBTo=
@@ -846,7 +765,6 @@ github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnIn
 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/spf13/viper v1.4.0/go.mod h1:PTJ7Z/lr49W6bUbkmS1V3by4uWynFiR9p7+dSq/yZzE=
-github.com/spf13/viper v1.8.1/go.mod h1:o0Pch8wJ9BVSWGQMbra6iw0oQ5oktSIBaujf1rJH9Ns=
 github.com/spf13/viper v1.10.0/go.mod h1:SoyBPwAtKDzypXNDFKN5kzH7ppppbGZtls1UpIy5AsM=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
@@ -907,19 +825,14 @@ github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9dec
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
-go.etcd.io/bbolt v1.3.5 h1:XAzx9gjCb0Rxj7EoqcClPD1d5ZBxZJk0jbuoPHenBt0=
 go.etcd.io/bbolt v1.3.5/go.mod h1:G5EMThwa9y8QZGBClrRx5EY+Yw9kAhnjy3bSjsnlVTQ=
 go.etcd.io/etcd v0.0.0-20191023171146-3cf2f69b5738/go.mod h1:dnLIgRNXwCJa5e+c6mIZCrds/GIG4ncV9HhK5PX7jPg=
 go.etcd.io/etcd v0.5.0-alpha.5.0.20191023171146-3cf2f69b5738/go.mod h1:dnLIgRNXwCJa5e+c6mIZCrds/GIG4ncV9HhK5PX7jPg=
-go.etcd.io/etcd v0.5.0-alpha.5.0.20200824191128-ae9734ed278b h1:3kC4J3eQF6p1UEfQTkC67eEeb3rTk+shQqdX6tFyq9Q=
 go.etcd.io/etcd v0.5.0-alpha.5.0.20200824191128-ae9734ed278b/go.mod h1:yVHk9ub3CSBatqGNg7GRmsnfLWtoW60w4eDYfh7vHDg=
 go.etcd.io/etcd v3.3.27+incompatible h1:5hMrpf6REqTHV2LW2OclNpRtxI0k9ZplMemJsMSWju0=
 go.etcd.io/etcd v3.3.27+incompatible/go.mod h1:yaeTdrJi5lOmYerz05bd8+V7KubZs8YSFZfzsF9A6aI=
-go.etcd.io/etcd/api/v3 v3.5.0/go.mod h1:cbVKeC6lCfl7j/8jBhAK6aIYO9XOjdptoxU/nLQcPvs=
 go.etcd.io/etcd/api/v3 v3.5.1/go.mod h1:cbVKeC6lCfl7j/8jBhAK6aIYO9XOjdptoxU/nLQcPvs=
-go.etcd.io/etcd/client/pkg/v3 v3.5.0/go.mod h1:IJHfcCEKxYu1Os13ZdwCwIUTUVGYTSAM3YSwc9/Ac1g=
 go.etcd.io/etcd/client/pkg/v3 v3.5.1/go.mod h1:IJHfcCEKxYu1Os13ZdwCwIUTUVGYTSAM3YSwc9/Ac1g=
-go.etcd.io/etcd/client/v2 v2.305.0/go.mod h1:h9puh54ZTgAKtEbut2oe9P4L/oqKCVB6xsXlzd7alYQ=
 go.etcd.io/etcd/client/v2 v2.305.1/go.mod h1:pMEacxZW7o8pg4CrFE7pquyCJJzZvkvdD2RibOCCCGs=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
@@ -934,15 +847,14 @@ go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
 go.uber.org/atomic v1.6.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
-go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/atomic v1.9.0 h1:ECmE8Bn/WFTYwEW/bpKD3M8VtR/zQVbavAoalC1PYyE=
 go.uber.org/atomic v1.9.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/dig v1.8.0/go.mod h1:X34SnWGr8Fyla9zQNO2GSO2D+TIuqB14OS8JhYocIyw=
 go.uber.org/fx v1.10.0/go.mod h1:vLRicqpG/qQEzno4SYU86iCwfT95EZza+Eba0ItuxqY=
 go.uber.org/goleak v0.10.0/go.mod h1:VCZuO8V8mFPlL0F5J5GK1rtHV3DrFcQ1R8ryq7FK0aI=
-go.uber.org/goleak v1.1.10 h1:z+mqJhf6ss6BSfSM671tgKyZBFPTTJM+HLxnhPC3wu0=
 go.uber.org/goleak v1.1.10/go.mod h1:8a7PlsEVH3e/a/GLqe5IIrQx6GzcnRmZEufDUTk4A7A=
+go.uber.org/goleak v1.1.11-0.20210813005559-691160354723 h1:sHOAIxRGBp443oHZIPB+HsUGaksVCXVQENPxwTfQdH4=
 go.uber.org/goleak v1.1.11-0.20210813005559-691160354723/go.mod h1:cwTWslyiVhfpKIDGSZEM2HlOvcqm+tG4zioyIeLoqMQ=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
 go.uber.org/multierr v1.3.0/go.mod h1:VgVr7evmIr6uPjLBxg28wmKNXyqE9akIJ5XnfpiKl+4=
@@ -957,7 +869,6 @@ go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
 go.uber.org/zap v1.12.0/go.mod h1:zwrFLgMcdUuIBviXEYEH1YKNaOBnKXsx2IPda5bBwHM=
 go.uber.org/zap v1.15.0/go.mod h1:Mb2vm2krFEG5DV0W9qcHBYFtp/Wku1cvYaqPsS/WYfc=
 go.uber.org/zap v1.16.0/go.mod h1:MA8QOfq0BHJwdXa996Y4dYkAqRKB8/1K1QMMZVaNZjQ=
-go.uber.org/zap v1.17.0 h1:MTjgFu6ZLKvY6Pvaqk97GlxNBuMpV4Hy/3P6tRGlI2U=
 go.uber.org/zap v1.17.0/go.mod h1:MXVU+bhUf/A7Xi2HNOnopQOrmycQ5Ih87HtOu4q5SSo=
 go.uber.org/zap v1.19.0/go.mod h1:xg/QME4nWcxGxrpdeYfq7UvYrLh66cuVKdrbD1XF/NI=
 go.uber.org/zap v1.19.1 h1:ue41HOKd1vGURxrmeKIgELGb3jPW9DMUDGtsinblHwI=
@@ -978,8 +889,6 @@ golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a/go.mod h1:LzIPMQfyMNhhGPh
 golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20211117183948-ae814b36b871/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
-golang.org/x/crypto v0.0.0-20211202192323-5770296d904e h1:MUP6MR3rJ7Gk9LEia0LP2ytiH6MuCfs7qYz+47jGdD8=
-golang.org/x/crypto v0.0.0-20211202192323-5770296d904e/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3 h1:0es+/5331RGQPcXlMfP+WrnIIS6dNnNRe0WB02W0F4M=
 golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/exp v0.0.0-20180321215751-8460e604b9de/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
@@ -1017,7 +926,6 @@ golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRu
 golang.org/x/lint v0.0.0-20200130185559-910be7a94367/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/lint v0.0.0-20201208152925-83fdc39ff7b5/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
-golang.org/x/lint v0.0.0-20210508222113-6edffad5e616 h1:VLliZ0d+/avPrXXH+OakdXhpJuEoBZuwh1m2j7U6Iug=
 golang.org/x/lint v0.0.0-20210508222113-6edffad5e616/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
 golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
@@ -1037,7 +945,6 @@ golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73r
 golang.org/x/net v0.0.0-20181005035420-146acd28ed58/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181023162649-9b4f9f5ad519/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20181201002055-351d144fa1fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -1089,8 +996,6 @@ golang.org/x/net v0.0.0-20210614182718-04defd469f4e/go.mod h1:9nx3DQGgdP8bBQD5qx
 golang.org/x/net v0.0.0-20210813160813-60bc85c4be6d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211118161319-6a13c67c3ce4/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.0.0-20211206223403-eba003a116a9 h1:HhGRSJWlxVO54+s9MeOVrZrbnwv+6oZQIvsUrMUte7U=
-golang.org/x/net v0.0.0-20211206223403-eba003a116a9/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211216030914-fe4d6282115f h1:hEYJvxw1lSnWIl8X9ofsYMklzaDs90JI2az5YMd4fPM=
 golang.org/x/net v0.0.0-20211216030914-fe4d6282115f/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@@ -1104,12 +1009,10 @@ golang.org/x/oauth2 v0.0.0-20201208152858-08078c50e5b5/go.mod h1:KelEdhl1UZF7XfJ
 golang.org/x/oauth2 v0.0.0-20210218202405-ba52d332ba99/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/oauth2 v0.0.0-20210220000619-9bb904979d93/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/oauth2 v0.0.0-20210313182246-cd4f82c27b84/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
-golang.org/x/oauth2 v0.0.0-20210402161424-2e8d93401602/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/oauth2 v0.0.0-20210514164344-f6687ab2804c/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/oauth2 v0.0.0-20210628180205-a41e5a781914/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/oauth2 v0.0.0-20210805134026-6f1e6394065a/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/oauth2 v0.0.0-20210819190943-2bc19b11175f/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
-golang.org/x/oauth2 v0.0.0-20211005180243-6b3c2da341f1 h1:B333XXssMuKQeBwiNODx4TupZy7bf4sxFZnN2ZOcvUE=
 golang.org/x/oauth2 v0.0.0-20211005180243-6b3c2da341f1/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8 h1:RerP+noqYHUQ8CMRcPlC2nvTa4dcBIjegkuWdcUDuqg=
 golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
@@ -1206,7 +1109,6 @@ golang.org/x/sys v0.0.0-20210616094352-59db8d763f22/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210816183151-1e6c022a8912/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210818153620-00dd8d7831e7/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210823070655-63515b42dcdf/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210831042530-f4d43177bf5e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210908233432-aa78b53d3365/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -1215,7 +1117,6 @@ golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20211025201205-69cdffdb9359/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211117180635-dee7805ff2e1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211124211545-fe61309f8881/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20211205182925-97ca703d548d h1:FjkYO/PPp4Wi0EAUOVLxePm7qVW4r4ctbWpURyuOD0E=
 golang.org/x/sys v0.0.0-20211205182925-97ca703d548d/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211210111614-af8b64212486/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e h1:fLOSk5Q00efkSvAm+4xcoXD+RRmLmmulPn5I3Y9F2EM=
@@ -1246,7 +1147,6 @@ golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190312170243-e65039ee4138/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
-golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190506145303-2d16b83fe98c/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
@@ -1267,7 +1167,6 @@ golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5/go.mod h1:b+2E5dAYhXwXZwtn
 golang.org/x/tools v0.0.0-20191030062658-86caa796c7ab/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191107010934-f79515f33823/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191108193012-7d206e10da11/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191112195655-aa38f8e97acc/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191113191852-77e3bb0ad9e7/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191114200427-caa0b0f7d508/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191115202509-3a792d9c32b2/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
@@ -1309,7 +1208,6 @@ golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.3/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.4/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
-golang.org/x/tools v0.1.5 h1:ouewzE6p+/VEB31YYnTbEJdi8pFqKp4P4n85vwo3DHA=
 golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -1346,7 +1244,6 @@ google.golang.org/api v0.36.0/go.mod h1:+z5ficQTmoYpPn8LCUNVpK5I7hwkpjbcgqA7I34q
 google.golang.org/api v0.40.0/go.mod h1:fYKFpnQN0DsDSKRVRcQSDQNtqWPfM9i+zNPxepjRCQ8=
 google.golang.org/api v0.41.0/go.mod h1:RkxM5lITDfTzmyKFPt+wGrCJbVfniCr2ool8kTBzRTU=
 google.golang.org/api v0.43.0/go.mod h1:nQsDGjRXMo4lvh5hP0TKqF244gqhGcr/YSIykhUk/94=
-google.golang.org/api v0.44.0/go.mod h1:EBOGZqzyhtvMDoxwS97ctnh0zUmYY6CxqXsc1AvkYD8=
 google.golang.org/api v0.47.0/go.mod h1:Wbvgpq1HddcWVtzsVLyfLp8lDg6AA241LmgIL59tHXo=
 google.golang.org/api v0.48.0/go.mod h1:71Pr1vy+TAZRPkPs/xlCf5SsU8WjuAWv1Pfjbtukyy4=
 google.golang.org/api v0.50.0/go.mod h1:4bNT5pAuq5ji4SRZm+5QIkjny9JAyVD/3gaSihNefaw=
@@ -1356,7 +1253,6 @@ google.golang.org/api v0.55.0/go.mod h1:38yMfeP1kfjsl8isn0tliTjIb1rJXcQi4UXlbqiv
 google.golang.org/api v0.56.0/go.mod h1:38yMfeP1kfjsl8isn0tliTjIb1rJXcQi4UXlbqivdVE=
 google.golang.org/api v0.57.0/go.mod h1:dVPlbZyBo2/OjBpmvNdpn2GRm6rPy75jyU7bmhdrMgI=
 google.golang.org/api v0.59.0/go.mod h1:sT2boj7M9YJxZzgeZqXogmhfmRWDtPzT31xkieUbuZU=
-google.golang.org/api v0.60.0 h1:eq/zs5WPH4J9undYM9IP1O7dSr7Yh8Y0GtSCpzGzIUk=
 google.golang.org/api v0.60.0/go.mod h1:d7rl65NZAkEQ90JFzqBjcRq1TVeG5ZoGV3sSpEnnVb4=
 google.golang.org/api v0.61.0/go.mod h1:xQRti5UdCmoCEqFxcz93fTl338AVqDgyaDRuOZ3hg9I=
 google.golang.org/api v0.62.0/go.mod h1:dKmwPCydfsad4qCH08MSdgWjfHOyfpd4VtDGgRFdavw=
@@ -1434,7 +1330,6 @@ google.golang.org/genproto v0.0.0-20210924002016-3dee208752a0/go.mod h1:5CzLGKJ6
 google.golang.org/genproto v0.0.0-20211008145708-270636b82663/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
 google.golang.org/genproto v0.0.0-20211021150943-2b146023228c/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
 google.golang.org/genproto v0.0.0-20211028162531-8db9c33dc351/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
-google.golang.org/genproto v0.0.0-20211118181313-81c1377c94b1 h1:b9mVrqYfq3P4bCdaLg1qtBnPzUYgglsIdjZkL/fQVOE=
 google.golang.org/genproto v0.0.0-20211118181313-81c1377c94b1/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
 google.golang.org/genproto v0.0.0-20211129164237-f09f9a12af12/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
 google.golang.org/genproto v0.0.0-20211203200212-54befc351ae9/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
@@ -1472,7 +1367,6 @@ google.golang.org/grpc v1.39.0/go.mod h1:PImNr+rS9TWYb2O4/emRugxiyHZ5JyHW5F+RPnD
 google.golang.org/grpc v1.39.1/go.mod h1:PImNr+rS9TWYb2O4/emRugxiyHZ5JyHW5F+RPnDzfrE=
 google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
 google.golang.org/grpc v1.40.1/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
-google.golang.org/grpc v1.42.0 h1:XT2/MFpuPFsEX2fWh3YQtHkZ+WYZFQRfaUgLZYj/p6A=
 google.golang.org/grpc v1.42.0/go.mod h1:k+4IHHFw41K8+bbowsex27ge2rCb65oeWqe4jJ590SU=
 google.golang.org/grpc v1.43.0 h1:Eeu7bZtDZ2DpRCsLhUlcrLnvYaMK1Gz86a+hMVvELmM=
 google.golang.org/grpc v1.43.0/go.mod h1:k+4IHHFw41K8+bbowsex27ge2rCb65oeWqe4jJ590SU=
@@ -1507,7 +1401,6 @@ gopkg.in/go-playground/validator.v8 v8.18.2/go.mod h1:RX2a/7Ha8BgOhfk7j780h4/u/R
 gopkg.in/go-playground/validator.v9 v9.29.1/go.mod h1:+c9/zcJMFNgbLvly1L1V+PpxWdVbfP1avr/N00E2vyQ=
 gopkg.in/inf.v0 v0.9.1 h1:73M5CoZyi3ZLMOyDlQh031Cx6N9NDJ2Vvfl76EDAgDc=
 gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
-gopkg.in/ini.v1 v1.62.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/ini.v1 v1.66.2/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/natefinch/lumberjack.v2 v2.0.0 h1:1Lc07Kr7qY4U2YPouBjpCLxpiyxIVoxqXgkXLknAOE8=
 gopkg.in/natefinch/lumberjack.v2 v2.0.0/go.mod h1:l0ndWWf7gzL7RNwBG7wST/UCcT4T24xpD6X8LsfU/+k=
diff --git a/internal/database/dbutil/schema.go b/internal/database/dbutil/schema.go
index 51429a91..88346620 100644
--- a/internal/database/dbutil/schema.go
+++ b/internal/database/dbutil/schema.go
@@ -33,6 +33,8 @@ var (
 				return fmt.Sprintf(`"%s" VARCHAR(%d)`, entity.Name, entity.Length)
 			case types.BackendMySQL:
 				return fmt.Sprintf("`%s` VARCHAR(%d)", entity.Name, entity.Length)
+			case types.BackendBigQuery:
+				return fmt.Sprintf(`%s STRING`, entity.Name)
 			default:
 				return fmt.Sprintf("%s VARCHAR(%d)", entity.Name, entity.Length)
 			}
diff --git a/internal/database/metadata/sqlutil/util.go b/internal/database/metadata/sqlutil/util.go
index 609858c5..d100f7e1 100644
--- a/internal/database/metadata/sqlutil/util.go
+++ b/internal/database/metadata/sqlutil/util.go
@@ -5,3 +5,11 @@ import "fmt"
 func OfflineBatchTableName(groupID int, revisionID int64) string {
 	return fmt.Sprintf("offline_batch_%d_%d", groupID, revisionID)
 }
+
+func OfflineStreamSnapshotTableName(groupID int, revisionID int) string {
+	return fmt.Sprintf("offline_stream_snapshot_%d_%d", groupID, revisionID)
+}
+
+func OfflineStreamCdcTableName(groupID int, revisionID int) string {
+	return fmt.Sprintf("offline_stream_cdc_%d_%d", groupID, revisionID)
+}
diff --git a/internal/database/offline/bigquery/store.go b/internal/database/offline/bigquery/store.go
index ee502300..7b86bf60 100644
--- a/internal/database/offline/bigquery/store.go
+++ b/internal/database/offline/bigquery/store.go
@@ -4,6 +4,8 @@ import (
 	"context"
 	"fmt"
 
+	"github.com/oom-ai/oomstore/internal/database/offline/sqlutil"
+
 	"github.com/spf13/cast"
 	"google.golang.org/api/iterator"
 
@@ -68,3 +70,12 @@ func (db *DB) TableSchema(ctx context.Context, tableName string) (*types.DataTab
 
 	return &schema, nil
 }
+
+func (db *DB) Snapshot(ctx context.Context, opt offline.SnapshotOpt) error {
+	dbOpt := dbutil.DBOpt{
+		Backend:    types.BackendBigQuery,
+		BigQueryDB: db.Client,
+		DatasetID:  &db.datasetID,
+	}
+	return sqlutil.Snapshot(ctx, dbOpt, opt)
+}
diff --git a/internal/database/offline/mock_offline/store.go b/internal/database/offline/mock_offline/store.go
index 82151d9f..4ffdf912 100644
--- a/internal/database/offline/mock_offline/store.go
+++ b/internal/database/offline/mock_offline/store.go
@@ -109,6 +109,20 @@ func (mr *MockStoreMockRecorder) Ping(ctx interface{}) *gomock.Call {
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Ping", reflect.TypeOf((*MockStore)(nil).Ping), ctx)
 }
 
+// Snapshot mocks base method.
+func (m *MockStore) Snapshot(ctx context.Context, opt offline.SnapshotOpt) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Snapshot", ctx, opt)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// Snapshot indicates an expected call of Snapshot.
+func (mr *MockStoreMockRecorder) Snapshot(ctx, opt interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Snapshot", reflect.TypeOf((*MockStore)(nil).Snapshot), ctx, opt)
+}
+
 // TableSchema mocks base method.
 func (m *MockStore) TableSchema(ctx context.Context, tableName string) (*types.DataTableSchema, error) {
 	m.ctrl.T.Helper()
diff --git a/internal/database/offline/mysql/store.go b/internal/database/offline/mysql/store.go
index cff8171b..824cda4e 100644
--- a/internal/database/offline/mysql/store.go
+++ b/internal/database/offline/mysql/store.go
@@ -43,3 +43,11 @@ func (db *DB) Join(ctx context.Context, opt offline.JoinOpt) (*types.JoinResult,
 func (db *DB) TableSchema(ctx context.Context, tableName string) (*types.DataTableSchema, error) {
 	return nil, fmt.Errorf("not implemented")
 }
+
+func (db *DB) Snapshot(ctx context.Context, opt offline.SnapshotOpt) error {
+	dbOpt := dbutil.DBOpt{
+		Backend: types.BackendMySQL,
+		SqlxDB:  db.DB,
+	}
+	return sqlutil.Snapshot(ctx, dbOpt, opt)
+}
diff --git a/internal/database/offline/postgres/store.go b/internal/database/offline/postgres/store.go
index 2378c339..1104a43c 100644
--- a/internal/database/offline/postgres/store.go
+++ b/internal/database/offline/postgres/store.go
@@ -46,3 +46,11 @@ func (db *DB) TableSchema(ctx context.Context, tableName string) (*types.DataTab
 	}
 	return sqlutil.SqlxTableSchema(ctx, db, BackendType, rows)
 }
+
+func (db *DB) Snapshot(ctx context.Context, opt offline.SnapshotOpt) error {
+	dbOpt := dbutil.DBOpt{
+		Backend: types.BackendPostgres,
+		SqlxDB:  db.DB,
+	}
+	return sqlutil.Snapshot(ctx, dbOpt, opt)
+}
diff --git a/internal/database/offline/redshift/store.go b/internal/database/offline/redshift/store.go
index 2d2eb66c..ec0581bc 100644
--- a/internal/database/offline/redshift/store.go
+++ b/internal/database/offline/redshift/store.go
@@ -48,3 +48,11 @@ func (db *DB) TableSchema(ctx context.Context, tableName string) (*types.DataTab
 	}
 	return sqlutil.SqlxTableSchema(ctx, db, BackendType, rows)
 }
+
+func (db *DB) Snapshot(ctx context.Context, opt offline.SnapshotOpt) error {
+	dbOpt := dbutil.DBOpt{
+		Backend: types.BackendRedshift,
+		SqlxDB:  db.DB,
+	}
+	return sqlutil.Snapshot(ctx, dbOpt, opt)
+}
diff --git a/internal/database/offline/snowflake/store.go b/internal/database/offline/snowflake/store.go
index b7a1ba22..6b9e78c4 100644
--- a/internal/database/offline/snowflake/store.go
+++ b/internal/database/offline/snowflake/store.go
@@ -58,3 +58,11 @@ func (db *DB) Join(ctx context.Context, opt offline.JoinOpt) (*types.JoinResult,
 func (db *DB) TableSchema(ctx context.Context, tableName string) (*types.DataTableSchema, error) {
 	return nil, fmt.Errorf("not implemented")
 }
+
+func (db *DB) Snapshot(ctx context.Context, opt offline.SnapshotOpt) error {
+	dbOpt := dbutil.DBOpt{
+		Backend: types.BackendSnowflake,
+		SqlxDB:  db.DB,
+	}
+	return sqlutil.Snapshot(ctx, dbOpt, opt)
+}
diff --git a/internal/database/offline/sqlite/store.go b/internal/database/offline/sqlite/store.go
index d333c4f6..5ba1d326 100644
--- a/internal/database/offline/sqlite/store.go
+++ b/internal/database/offline/sqlite/store.go
@@ -44,3 +44,11 @@ func (db *DB) Join(ctx context.Context, opt offline.JoinOpt) (*types.JoinResult,
 func (db *DB) TableSchema(ctx context.Context, tableName string) (*types.DataTableSchema, error) {
 	return nil, fmt.Errorf("not implemented")
 }
+
+func (db *DB) Snapshot(ctx context.Context, opt offline.SnapshotOpt) error {
+	dbOpt := dbutil.DBOpt{
+		Backend: types.BackendSQLite,
+		SqlxDB:  db.DB,
+	}
+	return sqlutil.Snapshot(ctx, dbOpt, opt)
+}
diff --git a/internal/database/offline/sqlutil/snapshot.go b/internal/database/offline/sqlutil/snapshot.go
new file mode 100644
index 00000000..12095bef
--- /dev/null
+++ b/internal/database/offline/sqlutil/snapshot.go
@@ -0,0 +1,141 @@
+package sqlutil
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"strings"
+	"text/template"
+
+	"github.com/oom-ai/oomstore/internal/database/dbutil"
+	"github.com/oom-ai/oomstore/pkg/oomstore/types"
+
+	"github.com/oom-ai/oomstore/internal/database/metadata/sqlutil"
+	"github.com/oom-ai/oomstore/internal/database/offline"
+)
+
+const SNAPSHOT_QUERY = `
+INSERT INTO {{ qt .CurrSnapshotTableName }} ({{ qt .EntityName }}, {{ columnJoin .FeatureNames }})
+SELECT
+	l.{{ qt .EntityName }},
+	{{ featureValue .FeatureNames }}
+FROM {{ qt .PrevSnapshotTableName }} AS l
+LEFT JOIN
+(
+	SELECT
+		t1.*
+	FROM
+		{{ qt .CurrCdcTableName }} AS t1
+	JOIN
+		(SELECT
+			{{ qt .EntityName }},
+			MAX({{ qt .UnixMilli }}) AS {{ qt .UnixMilli }}
+		FROM {{ qt .CurrCdcTableName }}
+		GROUP BY {{ qt .EntityName }}) AS t2
+	ON t1.{{ qt .EntityName }} = t2.{{ qt .EntityName }} AND t1.{{ qt .UnixMilli }} = t2.{{ qt .UnixMilli }}
+) AS r
+ON l.{{ qt .EntityName }} = r.{{ qt .EntityName }}
+{{ .Union }}
+SELECT
+	r.{{ qt .EntityName }},
+	{{ featureValue .FeatureNames }}
+FROM
+(
+	SELECT
+		t1.*
+	FROM
+		{{ qt .CurrCdcTableName }} AS t1
+	JOIN
+		(SELECT
+			{{ qt .EntityName }},
+			MAX({{ qt .UnixMilli }}) AS {{ qt .UnixMilli }}
+		FROM {{ qt .CurrCdcTableName }}
+		GROUP BY {{ qt .EntityName }}) AS t2
+	ON t1.{{ qt .EntityName }} = t2.{{ qt .EntityName }} AND t1.{{ qt .UnixMilli }} = t2.{{ qt .UnixMilli }}
+) AS r
+LEFT JOIN
+{{ qt .PrevSnapshotTableName }} AS l
+ON l.{{ qt .EntityName }} = r.{{ qt .EntityName }}
+`
+
+func Snapshot(ctx context.Context, dbOpt dbutil.DBOpt, opt offline.SnapshotOpt) error {
+	prevSnapshotTableName := sqlutil.OfflineStreamSnapshotTableName(opt.Group.ID, opt.PrevRevisionID)
+	currSnapshotTableName := sqlutil.OfflineStreamSnapshotTableName(opt.Group.ID, opt.RevisionID)
+	currCdcTableName := sqlutil.OfflineStreamCdcTableName(opt.Group.ID, opt.RevisionID)
+
+	if dbOpt.Backend == types.BackendBigQuery {
+		currSnapshotTableName = fmt.Sprintf("%s.%s", *dbOpt.DatasetID, currSnapshotTableName)
+		prevSnapshotTableName = fmt.Sprintf("%s.%s", *dbOpt.DatasetID, prevSnapshotTableName)
+		currCdcTableName = fmt.Sprintf("%s.%s", *dbOpt.DatasetID, currCdcTableName)
+	}
+
+	schema, err := dbutil.BuildCreateSchema(currSnapshotTableName, opt.Group.Entity, opt.Features, dbOpt.Backend)
+	if err != nil {
+		return err
+	}
+
+	if err = dbOpt.ExecContext(ctx, schema, nil); err != nil {
+		return err
+	}
+	query, err := buildSnapshotQuery(snapshotQueryParams{
+		EntityName:            opt.Group.Entity.Name,
+		UnixMilli:             "unix_milli",
+		FeatureNames:          opt.Features.Names(),
+		PrevSnapshotTableName: prevSnapshotTableName,
+		CurrSnapshotTableName: currSnapshotTableName,
+		CurrCdcTableName:      currCdcTableName,
+		Backend:               dbOpt.Backend,
+	})
+	if err != nil {
+		return err
+	}
+	if err = dbOpt.ExecContext(ctx, query, nil); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+type snapshotQueryParams struct {
+	EntityName            string
+	UnixMilli             string
+	FeatureNames          []string
+	PrevSnapshotTableName string
+	CurrSnapshotTableName string
+	CurrCdcTableName      string
+	Union                 string
+	Backend               types.BackendType
+	DatasetID             *string
+}
+
+func buildSnapshotQuery(params snapshotQueryParams) (string, error) {
+	if params.Backend == types.BackendBigQuery {
+		params.Union = "UNION DISTINCT"
+	} else {
+		params.Union = "UNION"
+	}
+	qt, err := dbutil.QuoteFn(params.Backend)
+	if err != nil {
+		return "", err
+	}
+
+	t := template.Must(template.New("snapshot").Funcs(template.FuncMap{
+		"qt": qt,
+		"columnJoin": func(columns []string) string {
+			return qt(columns...)
+		},
+		"featureValue": func(features []string) string {
+			values := make([]string, 0, len(features))
+			for _, f := range features {
+				values = append(values, fmt.Sprintf("(CASE WHEN r.%s IS NULL THEN l.%s ELSE r.%s END) AS %s", qt(f), qt(f), qt(f), f))
+			}
+			return strings.Join(values, ",")
+		},
+	}).Parse(SNAPSHOT_QUERY))
+
+	buf := bytes.NewBuffer(nil)
+	if err := t.Execute(buf, params); err != nil {
+		return "", err
+	}
+	return buf.String(), nil
+}
diff --git a/internal/database/offline/store.go b/internal/database/offline/store.go
index b09dc275..305ccc46 100644
--- a/internal/database/offline/store.go
+++ b/internal/database/offline/store.go
@@ -13,6 +13,7 @@ type Store interface {
 	Import(ctx context.Context, opt ImportOpt) (int64, error)
 
 	TableSchema(ctx context.Context, tableName string) (*types.DataTableSchema, error)
+	Snapshot(ctx context.Context, opt SnapshotOpt) error
 
 	Ping(ctx context.Context) error
 	io.Closer
diff --git a/internal/database/offline/types.go b/internal/database/offline/types.go
index f1450f5f..15cb333c 100644
--- a/internal/database/offline/types.go
+++ b/internal/database/offline/types.go
@@ -51,3 +51,10 @@ type CSVSource struct {
 	Reader    *bufio.Reader
 	Delimiter string
 }
+
+type SnapshotOpt struct {
+	Group          *types.Group
+	Features       types.FeatureList
+	RevisionID     int
+	PrevRevisionID int
+}


Test patch:
diff --git a/internal/database/offline/bigquery/store_test.go b/internal/database/offline/bigquery/store_test.go
index 1ea828fa..7b4fa2a9 100644
--- a/internal/database/offline/bigquery/store_test.go
+++ b/internal/database/offline/bigquery/store_test.go
@@ -102,3 +102,7 @@ func TestTableSchema(t *testing.T) {
 		}
 	})
 }
+
+func TestSnapshot(t *testing.T) {
+	test_impl.TestSnapshot(t, prepareStore, destroyStore(DATASET_ID))
+}
diff --git a/internal/database/offline/mysql/store_test.go b/internal/database/offline/mysql/store_test.go
index 5f1ea698..c84a2e29 100644
--- a/internal/database/offline/mysql/store_test.go
+++ b/internal/database/offline/mysql/store_test.go
@@ -44,3 +44,7 @@ func TestImport(t *testing.T) {
 func TestJoin(t *testing.T) {
 	test_impl.TestJoin(t, prepareStore, runtime_mysql.DestroyStore(DATABASE))
 }
+
+func TestSnapshot(t *testing.T) {
+	test_impl.TestSnapshot(t, prepareStore, runtime_mysql.DestroyStore(DATABASE))
+}
diff --git a/internal/database/offline/snowflake/store_test.go b/internal/database/offline/snowflake/store_test.go
index 3a88600f..dace253e 100644
--- a/internal/database/offline/snowflake/store_test.go
+++ b/internal/database/offline/snowflake/store_test.go
@@ -67,3 +67,7 @@ func TestImport(t *testing.T) {
 func TestJoin(t *testing.T) {
 	test_impl.TestJoin(t, prepareStore, destroyStore(DATABASE))
 }
+
+func TestSnapshot(t *testing.T) {
+	test_impl.TestSnapshot(t, prepareStore, destroyStore(DATABASE))
+}
diff --git a/internal/database/offline/sqlite/store_test.go b/internal/database/offline/sqlite/store_test.go
index e92653d6..0cf6c67f 100644
--- a/internal/database/offline/sqlite/store_test.go
+++ b/internal/database/offline/sqlite/store_test.go
@@ -43,3 +43,7 @@ func TestImport(t *testing.T) {
 func TestJoin(t *testing.T) {
 	test_impl.TestJoin(t, prepareStore, destroyStore)
 }
+
+func TestSnapshot(t *testing.T) {
+	test_impl.TestSnapshot(t, prepareStore, destroyStore)
+}
diff --git a/internal/database/offline/test_impl/join.go b/internal/database/offline/test_impl/join.go
index 4ab565d3..b1a0d4af 100644
--- a/internal/database/offline/test_impl/join.go
+++ b/internal/database/offline/test_impl/join.go
@@ -17,8 +17,8 @@ import (
 	"github.com/oom-ai/oomstore/pkg/oomstore/types"
 )
 
-func TestJoin(t *testing.T, prepareStore PrepareStoreFn, destoryStore DestroyStoreFn) {
-	t.Cleanup(destoryStore)
+func TestJoin(t *testing.T, prepareStore PrepareStoreFn, destroyStore DestroyStoreFn) {
+	t.Cleanup(destroyStore)
 
 	ctx, store := prepareStore(t)
 	defer store.Close()
diff --git a/internal/database/offline/test_impl/snapshot.go b/internal/database/offline/test_impl/snapshot.go
new file mode 100644
index 00000000..d6e756f8
--- /dev/null
+++ b/internal/database/offline/test_impl/snapshot.go
@@ -0,0 +1,83 @@
+package test_impl
+
+import (
+	"bufio"
+	"sort"
+	"strings"
+	"testing"
+
+	"github.com/spf13/cast"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/oom-ai/oomstore/internal/database/offline"
+	"github.com/oom-ai/oomstore/pkg/oomstore/types"
+)
+
+func TestSnapshot(t *testing.T, prepareStore PrepareStoreFn, destroyStore DestroyStoreFn) {
+	t.Cleanup(destroyStore)
+
+	ctx, store := prepareStore(t)
+	defer store.Close()
+
+	group := &types.Group{
+		ID: 1,
+		Entity: &types.Entity{
+			Name:   "device",
+			Length: 10,
+		},
+	}
+	unixMilli := &types.Feature{
+		Name:      "unix_milli",
+		ValueType: types.Int64,
+	}
+	features, _ := prepareFeatures(true)
+
+	buildTestSnapshotTable(ctx, t, store, features, "offline_stream_snapshot_1_1", &offline.CSVSource{
+		Reader: bufio.NewReader(strings.NewReader(`1234,xiaomi,100
+1235,apple,200
+1236,oneplus,155
+`)),
+		Delimiter: ",",
+	})
+
+	buildTestSnapshotTable(ctx, t, store, append(features, unixMilli), "offline_stream_cdc_1_2", &offline.CSVSource{
+		Reader: bufio.NewReader(strings.NewReader(`1234,xiaomi-1,120,2
+1235,apple-2,115,14
+1234,xiaomi-1,130,10
+1237,pixel,200,11
+1235,apple-1,113,15
+`)),
+		Delimiter: ",",
+	})
+
+	err := store.Snapshot(ctx, offline.SnapshotOpt{
+		Group:          group,
+		Features:       features,
+		RevisionID:     2,
+		PrevRevisionID: 1,
+	})
+	assert.NoError(t, err)
+
+	actual, errs := store.Export(ctx, offline.ExportOpt{
+		SnapshotTable: "offline_stream_snapshot_1_2",
+		EntityName:    "device",
+		Features:      features,
+	})
+	values := make([][]interface{}, 0)
+	for row := range actual {
+		values = append(values, row)
+	}
+	sort.Slice(values, func(i, j int) bool {
+		return cast.ToInt64(values[i][0]) < cast.ToInt64(values[j][0])
+	})
+	expected := [][]interface{}{
+		{"1234", "xiaomi-1", int64(130)},
+		{"1235", "apple-1", int64(113)},
+		{"1236", "oneplus", int64(155)},
+		{"1237", "pixel", int64(200)},
+	}
+	assert.Equal(t, expected, values)
+	assert.NoError(t, <-errs)
+
+}