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Posted to notifications@asterixdb.apache.org by "abdullah alamoudi (Code Review)" <do...@asterixdb.incubator.apache.org> on 2016/02/18 17:17:17 UTC
Change in asterixdb[master]: ASTERIXDB-1286 Add User Documentation for Upsert
abdullah alamoudi has uploaded a new change for review.
https://asterix-gerrit.ics.uci.edu/640
Change subject: ASTERIXDB-1286 Add User Documentation for Upsert
......................................................................
ASTERIXDB-1286 Add User Documentation for Upsert
Documentation for upsert has been added. It includes multiple examples:
1. Example with a single record upsert.
2. Example with a query based upsert.
3. Example of an upsert with self query.
The documentation explains the transaction properties of upserts as well.
Change-Id: I677dbeb5cbc7e8a83aa50db0c3cd59f91f6a2e69
---
M asterix-doc/src/site/markdown/aql/manual.md
M asterix-doc/src/site/markdown/aql/primer.md
2 files changed, 67 insertions(+), 1 deletion(-)
git pull ssh://asterix-gerrit.ics.uci.edu:29418/asterixdb refs/changes/40/640/1
diff --git a/asterix-doc/src/site/markdown/aql/manual.md b/asterix-doc/src/site/markdown/aql/manual.md
index 174fdaf..a5caefb 100644
--- a/asterix-doc/src/site/markdown/aql/manual.md
+++ b/asterix-doc/src/site/markdown/aql/manual.md
@@ -480,11 +480,12 @@
| SetStatement
| InsertStatement
| DeleteStatement
+ | UpsertStatement
| Query
In addition to expresssions for queries, AQL supports a variety of statements for data
definition and manipulation purposes as well as controlling the context to be used in
-evaluating AQL expressions. AQL supports record-level ACID transactions that begin and terminate implicitly for each record inserted, deleted, or searched while a given AQL statement is being executed.
+evaluating AQL expressions. AQL supports record-level ACID transactions that begin and terminate implicitly for each record inserted, deleted, upserted, or searched while a given AQL statement is being executed.
This section details the statements supported in the AQL language.
@@ -861,6 +862,28 @@
delete $user from dataset FacebookUsers where $user.id = 8;
+#### Upsert
+
+ UpsertStatement ::= "upsert" "into" "dataset" QualifiedName Query
+
+The AQL upsert statement is used to couple delete (if found) with insert data into a dataset.
+The data to be upserted comes from an AQL query expression.
+The expression can be as simple as a constant expression, or in general it can be any legal AQL query.
+Upserts in AsterixDB are processed transactionally, with the scope of each upsert transaction
+being the upsertion (deletion if found + insertion) of a single object plus its affiliated secondary index entries (if any).
+If the query part of an upsert returns a single object, then the upsert statement itself will
+be a single, atomic transaction.
+If the query part returns multiple objects, then each object upserted will be handled independently
+as a tranaction.
+
+The following example illustrates a query-based upsertion.
+
+##### Example
+
+ upsert into dataset Users (for $user in dataset FacebookUsers return $user)
+
+
+
We close this guide to AQL with one final example of a query expression.
##### Example
diff --git a/asterix-doc/src/site/markdown/aql/primer.md b/asterix-doc/src/site/markdown/aql/primer.md
index b1ffec7..13baaf5 100644
--- a/asterix-doc/src/site/markdown/aql/primer.md
+++ b/asterix-doc/src/site/markdown/aql/primer.md
@@ -900,6 +900,49 @@
dataset where it resides, and another to insert the new replacement record (with the same primary key but with
different field values for some of the associated data content).
+### Upserting Data ###
+In addition to loading, querying, inserting, and deleting data, AsterixDB supports upserting records using the AQL _upsert_ statement.
+
+The following example deletes the tweet with the tweetid = 20 (if exists) and inserts the new tweet with tweetid=20 and the user "SwanSmitty" to the TweetMessages dataset. The two operations (delete if found and insert) are performed as an atomic operation that either performed completely or not at all.
+
+ use dataverse TinySocial;
+ upsert into dataset TweetMessages
+ (
+ {"tweetid":"20",
+ "user":
+ {"screen-name":"SwanSmitty",
+ "lang":"en",
+ "friends_count":91345,
+ "statuses_count":4079,
+ "name":"Swanson Smith",
+ "followers_count":50420
+ },
+ "sender-location":point("47.44,80.65"),
+ "send-time":datetime("2008-04-26T10:10:35"),
+ "referred-topics":{{"football"}},
+ "message-text":"football is the best sport, period.!"
+ }
+ );
+
+In general, the data to be upserted may be specified using any valid AQL query expression.
+For example, the following statement might be used to double the followers count of all existing users.
+
+ use dataverse TinySocial;
+ upsert into dataset TweetUsers
+ (
+ for $user in dataset TweetUsers
+ return {
+ "screen-name":$user.screen-name,
+ "lang":$user.lang,
+ "friends_count":$user.friends_count,
+ "statuses_count":$user.statuses_count,
+ "name":$user.name,
+ "followers_count":$user.followers_count*2
+ }
+ );
+
+Note that an upsert operation is executed in two steps, the query is performed,query locks are released, and then its result is upserted into the dataset. This means that the record can be modified between computing the query result and performing the upsert.
+
### Transaction Support
AsterixDB supports record-level ACID transactions that begin and terminate implicitly for each record inserted, deleted, or searched while a given AQL statement is being executed. This is quite similar to the level of transaction support found in today's NoSQL stores. AsterixDB does not support multi-statement transactions, and in fact an AQL statement that involves multiple records can itself involve multiple independent record-level transactions. An example consequence of this is that, when an AQL statement attempts to insert 1000 records, it is possible that the first 800 records could end up being committed while the remaining 200 records fail to be inserted. This situation could happen, for example, if a duplicate key exception occurs as the 801st insertion is attempted. If this happens, AsterixDB will report the error (e.g., a duplicate key exception) as the result of the offending AQL insert statement, and the application logic above will need to take the appropriate
action(s) needed to assess the resulting state and to clean up and/or continue as appropriate.
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Change in asterixdb[master]: ASTERIXDB-1286 Add User Documentation for Upsert
Posted by "Jenkins (Code Review)" <do...@asterixdb.incubator.apache.org>.
Jenkins has posted comments on this change.
Change subject: ASTERIXDB-1286 Add User Documentation for Upsert
......................................................................
Patch Set 2:
Build Started https://asterix-jenkins.ics.uci.edu/job/asterix-gerrit-notopic/834/
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Change in asterixdb[master]: ASTERIXDB-1286 Add User Documentation for Upsert
Posted by "Jenkins (Code Review)" <do...@asterixdb.incubator.apache.org>.
Jenkins has posted comments on this change.
Change subject: ASTERIXDB-1286 Add User Documentation for Upsert
......................................................................
Patch Set 1:
Build Started https://asterix-jenkins.ics.uci.edu/job/asterix-gerrit-notopic/833/
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Change in asterixdb[master]: ASTERIXDB-1286 Add User Documentation for Upsert
Posted by "abdullah alamoudi (Code Review)" <do...@asterixdb.incubator.apache.org>.
abdullah alamoudi has posted comments on this change.
Change subject: ASTERIXDB-1286 Add User Documentation for Upsert
......................................................................
Patch Set 2:
(2 comments)
https://asterix-gerrit.ics.uci.edu/#/c/640/2/asterix-doc/src/site/markdown/aql/primer.md
File asterix-doc/src/site/markdown/aql/primer.md:
Line 935: "screen-name":$user.screen-name,
> WS
Done
Line 943:
> WS
Done
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Change in asterixdb[master]: ASTERIXDB-1286 Add User Documentation for Upsert
Posted by "Till Westmann (Code Review)" <do...@asterixdb.incubator.apache.org>.
Till Westmann has submitted this change and it was merged.
Change subject: ASTERIXDB-1286 Add User Documentation for Upsert
......................................................................
ASTERIXDB-1286 Add User Documentation for Upsert
Documentation for upsert has been added. It includes multiple examples:
1. Example with a single record upsert.
2. Example with a query based upsert.
3. Example of an upsert with self query.
The documentation explains the transaction properties of upserts as well.
Change-Id: I677dbeb5cbc7e8a83aa50db0c3cd59f91f6a2e69
Reviewed-on: https://asterix-gerrit.ics.uci.edu/640
Reviewed-by: Jenkins <je...@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <je...@fulliautomatix.ics.uci.edu>
Reviewed-by: Till Westmann <ti...@apache.org>
---
M asterixdb/asterix-doc/src/site/markdown/aql/manual.md
M asterixdb/asterix-doc/src/site/markdown/aql/primer.md
2 files changed, 72 insertions(+), 1 deletion(-)
Approvals:
Till Westmann: Looks good to me, approved
Jenkins: Looks good to me, but someone else must approve; Verified
diff --git a/asterixdb/asterix-doc/src/site/markdown/aql/manual.md b/asterixdb/asterix-doc/src/site/markdown/aql/manual.md
index a7d1669..510bc83 100644
--- a/asterixdb/asterix-doc/src/site/markdown/aql/manual.md
+++ b/asterixdb/asterix-doc/src/site/markdown/aql/manual.md
@@ -480,11 +480,12 @@
| SetStatement
| InsertStatement
| DeleteStatement
+ | UpsertStatement
| Query
In addition to expresssions for queries, AQL supports a variety of statements for data
definition and manipulation purposes as well as controlling the context to be used in
-evaluating AQL expressions. AQL supports record-level ACID transactions that begin and terminate implicitly for each record inserted, deleted, or searched while a given AQL statement is being executed.
+evaluating AQL expressions. AQL supports record-level ACID transactions that begin and terminate implicitly for each record inserted, deleted, upserted, or searched while a given AQL statement is being executed.
This section details the statements supported in the AQL language.
@@ -861,6 +862,27 @@
delete $user from dataset FacebookUsers where $user.id = 8;
+#### Upsert
+
+ UpsertStatement ::= "upsert" "into" "dataset" QualifiedName Query
+
+The AQL upsert statement is used to couple delete (if found) with insert data into a dataset.
+The data to be upserted comes from an AQL query expression.
+The expression can be as simple as a constant expression, or in general it can be any legal AQL query.
+Upserts in AsterixDB are processed transactionally, with the scope of each upsert transaction
+being the upsertion (deletion if found + insertion) of a single object plus its affiliated
+secondary index entries (if any).
+If the query part of an upsert returns a single object, then the upsert statement itself will
+be a single, atomic transaction.
+If the query part returns multiple objects, then each object upserted will be handled independently
+as a tranaction.
+
+The following example illustrates a query-based upsertion.
+
+##### Example
+
+ upsert into dataset Users (for $user in dataset FacebookUsers return $user)
+
We close this guide to AQL with one final example of a query expression.
##### Example
diff --git a/asterixdb/asterix-doc/src/site/markdown/aql/primer.md b/asterixdb/asterix-doc/src/site/markdown/aql/primer.md
index b1ffec7..d99ba6d 100644
--- a/asterixdb/asterix-doc/src/site/markdown/aql/primer.md
+++ b/asterixdb/asterix-doc/src/site/markdown/aql/primer.md
@@ -900,6 +900,55 @@
dataset where it resides, and another to insert the new replacement record (with the same primary key but with
different field values for some of the associated data content).
+### Upserting Data ###
+In addition to loading, querying, inserting, and deleting data, AsterixDB supports upserting
+records using the AQL _upsert_ statement.
+
+The following example deletes the tweet with the tweetid = 20 (if exists) and inserts the
+new tweet with tweetid=20 and the user "SwanSmitty" to the TweetMessages dataset. The two
+operations (delete if found and insert) are performed as an atomic operation that is either
+performed completely or not at all.
+
+ use dataverse TinySocial;
+ upsert into dataset TweetMessages
+ (
+ {"tweetid":"20",
+ "user":
+ {"screen-name":"SwanSmitty",
+ "lang":"en",
+ "friends_count":91345,
+ "statuses_count":4079,
+ "name":"Swanson Smith",
+ "followers_count":50420
+ },
+ "sender-location":point("47.44,80.65"),
+ "send-time":datetime("2008-04-26T10:10:35"),
+ "referred-topics":{{"football"}},
+ "message-text":"football is the best sport, period.!"
+ }
+ );
+
+The data to be upserted may be specified using any valid AQL query expression.
+For example, the following statement might be used to double the followers count of all existing users.
+
+ use dataverse TinySocial;
+ upsert into dataset TweetUsers
+ (
+ for $user in dataset TweetUsers
+ return {
+ "screen-name":$user.screen-name,
+ "lang":$user.lang,
+ "friends_count":$user.friends_count,
+ "statuses_count":$user.statuses_count,
+ "name":$user.name,
+ "followers_count":$user.followers_count*2
+ }
+ );
+
+Note that an upsert operation is executed in two steps, the query is performed,query locks
+are released, and then its result is upserted into the dataset. This means that the record
+can be modified between computing the query result and performing the upsert.
+
### Transaction Support
AsterixDB supports record-level ACID transactions that begin and terminate implicitly for each record inserted, deleted, or searched while a given AQL statement is being executed. This is quite similar to the level of transaction support found in today's NoSQL stores. AsterixDB does not support multi-statement transactions, and in fact an AQL statement that involves multiple records can itself involve multiple independent record-level transactions. An example consequence of this is that, when an AQL statement attempts to insert 1000 records, it is possible that the first 800 records could end up being committed while the remaining 200 records fail to be inserted. This situation could happen, for example, if a duplicate key exception occurs as the 801st insertion is attempted. If this happens, AsterixDB will report the error (e.g., a duplicate key exception) as the result of the offending AQL insert statement, and the application logic above will need to take the appropriate
action(s) needed to assess the resulting state and to clean up and/or continue as appropriate.
--
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Gerrit-MessageType: merged
Gerrit-Change-Id: I677dbeb5cbc7e8a83aa50db0c3cd59f91f6a2e69
Gerrit-PatchSet: 4
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Gerrit-Owner: abdullah alamoudi <ba...@gmail.com>
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Gerrit-Reviewer: Michael Carey <dt...@gmail.com>
Gerrit-Reviewer: Till Westmann <ti...@apache.org>
Gerrit-Reviewer: abdullah alamoudi <ba...@gmail.com>
Change in asterixdb[master]: ASTERIXDB-1286 Add User Documentation for Upsert
Posted by "abdullah alamoudi (Code Review)" <do...@asterixdb.incubator.apache.org>.
Hello Jenkins,
I'd like you to reexamine a change. Please visit
https://asterix-gerrit.ics.uci.edu/640
to look at the new patch set (#3).
Change subject: ASTERIXDB-1286 Add User Documentation for Upsert
......................................................................
ASTERIXDB-1286 Add User Documentation for Upsert
Documentation for upsert has been added. It includes multiple examples:
1. Example with a single record upsert.
2. Example with a query based upsert.
3. Example of an upsert with self query.
The documentation explains the transaction properties of upserts as well.
Change-Id: I677dbeb5cbc7e8a83aa50db0c3cd59f91f6a2e69
---
M asterixdb/asterix-doc/src/site/markdown/aql/manual.md
M asterixdb/asterix-doc/src/site/markdown/aql/primer.md
2 files changed, 72 insertions(+), 1 deletion(-)
git pull ssh://asterix-gerrit.ics.uci.edu:29418/asterixdb refs/changes/40/640/3
--
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Gerrit-Reviewer: Michael Carey <dt...@gmail.com>
Gerrit-Reviewer: Till Westmann <ti...@apache.org>
Gerrit-Reviewer: abdullah alamoudi <ba...@gmail.com>
Change in asterixdb[master]: ASTERIXDB-1286 Add User Documentation for Upsert
Posted by "Jenkins (Code Review)" <do...@asterixdb.incubator.apache.org>.
Jenkins has posted comments on this change.
Change subject: ASTERIXDB-1286 Add User Documentation for Upsert
......................................................................
Patch Set 2: Verified+1
Build Successful
https://asterix-jenkins.ics.uci.edu/job/asterix-gerrit-notopic/834/ : SUCCESS
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Change in asterixdb[master]: ASTERIXDB-1286 Add User Documentation for Upsert
Posted by "abdullah alamoudi (Code Review)" <do...@asterixdb.incubator.apache.org>.
Hello Jenkins,
I'd like you to reexamine a change. Please visit
https://asterix-gerrit.ics.uci.edu/640
to look at the new patch set (#2).
Change subject: ASTERIXDB-1286 Add User Documentation for Upsert
......................................................................
ASTERIXDB-1286 Add User Documentation for Upsert
Documentation for upsert has been added. It includes multiple examples:
1. Example with a single record upsert.
2. Example with a query based upsert.
3. Example of an upsert with self query.
The documentation explains the transaction properties of upserts as well.
Change-Id: I677dbeb5cbc7e8a83aa50db0c3cd59f91f6a2e69
---
M asterix-doc/src/site/markdown/aql/manual.md
M asterix-doc/src/site/markdown/aql/primer.md
2 files changed, 67 insertions(+), 1 deletion(-)
git pull ssh://asterix-gerrit.ics.uci.edu:29418/asterixdb refs/changes/40/640/2
--
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Change in asterixdb[master]: ASTERIXDB-1286 Add User Documentation for Upsert
Posted by "Till Westmann (Code Review)" <do...@asterixdb.incubator.apache.org>.
Till Westmann has posted comments on this change.
Change subject: ASTERIXDB-1286 Add User Documentation for Upsert
......................................................................
Patch Set 2:
(2 comments)
Looks good, but the whitespace should be fixed.
https://asterix-gerrit.ics.uci.edu/#/c/640/2/asterix-doc/src/site/markdown/aql/primer.md
File asterix-doc/src/site/markdown/aql/primer.md:
Line 935: "screen-name":$user.screen-name,
WS
Line 943:
WS
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Change in asterixdb[master]: ASTERIXDB-1286 Add User Documentation for Upsert
Posted by "Till Westmann (Code Review)" <do...@asterixdb.incubator.apache.org>.
Till Westmann has posted comments on this change.
Change subject: ASTERIXDB-1286 Add User Documentation for Upsert
......................................................................
Patch Set 3: Code-Review+2
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Change in asterixdb[master]: ASTERIXDB-1286 Add User Documentation for Upsert
Posted by "Jenkins (Code Review)" <do...@asterixdb.incubator.apache.org>.
Jenkins has posted comments on this change.
Change subject: ASTERIXDB-1286 Add User Documentation for Upsert
......................................................................
Patch Set 1: Verified-1
Build Failed
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