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  • YUGABYTEDB CORE
    • Quick start
      • 1. Install YugabyteDB
      • 2. Create a local cluster
      • 3. Explore distributed SQL
      • 4. Build an application
        • Java
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    • Explore features
      • YSQL vs PostgreSQL
        • Schemas and Tables
        • Data Types
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        • Queries and Joins
        • Stored Procedures
        • Table Partitioning
        • Tablespaces
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      • Fault tolerance
      • Horizontal Scalability
        • Scaling Transactions
        • Sharding Data
      • Transactions
        • Distributed Transactions
        • Isolation Levels
        • Explicit Locking
      • JSON Support
      • Multi-Region Deployments
        • Sync replication (3+ regions)
        • Async Replication (2+ regions)
        • Row-Level Geo-Partitioning
      • Query Optimization
        • Analyzing Queries with EXPLAIN
        • Optimizing YSQL queries using pg_hint_plan
      • Follower reads
      • Colocated tables
      • Change data capture (CDC)
      • Extensions
      • Observability
        • Prometheus Integration
    • Develop
      • Learn app development
        • 1. SQL vs NoSQL
        • 2. Data modeling
        • 3. Data types
        • 4. ACID transactions
        • 5. Aggregations
        • 6. Batch operations
        • 7. Date and time
        • 8. Strings and text
        • 9. TTL for data expiration
      • Ecosystem integrations
        • Apache Kafka
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      • Build GraphQL apps
        • Hasura
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      • Real-world examples
        • E-Commerce app
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      • Explore sample apps
      • Best practices
    • Migrate
      • Migration process overview
      • Migrate from PostgreSQL
        • Convert a PostgreSQL schema
        • Migrate a PostgreSQL application
        • Export PostgreSQL data
        • Prepare a cluster
        • Import PostgreSQL data
        • Verify Migration
    • Deploy
      • Deployment checklist
      • Manual deployment
        • 1. System configuration
        • 2. Install software
        • 3. Start YB-Masters
        • 4. Start YB-TServers
        • 5. Verify deployment
      • Kubernetes
        • Single-zone
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      • Docker
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      • Multi-DC deployments
        • Three+ data center (3DC)
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        • Read replica clusters
      • Change data capture (CDC)
        • CDC to Kafka
    • Benchmark
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      • sysbench
      • YCSB
      • Key-value workload
      • Large datasets
      • Scalability
        • Scaling queries
      • Resilience
        • Jepsen testing
      • Performance Troubleshooting
    • Secure
      • Security checklist
      • Enable Authentication
        • Enable User Authentication
        • Configure ysql_hba_conf_csv
      • Authentication Methods
        • Password Authentication
        • LDAP Authentication
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      • Role-Based Access Control
        • Overview
        • Manage Users and Roles
        • Grant Privileges
        • Row-Level Security (RLS)
        • Column-Level Security
      • Encryption in Transit
        • Create server certificates
        • Enable server-to-server encryption
        • Enable client-to-server encryption
        • Connect to Clusters
      • Encryption at rest
      • Column-Level Encryption
      • Audit Logging
        • Configure Audit Logging
        • Session-Level Audit Logging
        • Object-Level Audit Logging
      • Vulnerability disclosure policy
    • Manage
      • Back up and restore
        • Back up data
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        • Point-in-time restore
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      • Migrate data
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      • Change cluster configuration
      • Diagnostics reporting
      • Upgrade a deployment
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    • Troubleshoot
      • Troubleshooting
      • Common error messages
      • Cluster level issues
        • YCQL connection issues
        • YEDIS connection Issues
        • Recover tserver/master
        • Replace a failed YB-TServer
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        • Manual remote bootstrap when a majority of peers fail
      • Node level issues
        • Check servers
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    • Contribute
      • Core database
        • Contribution checklist
        • Build the source
        • Configure a CLion project
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  • YUGABYTE PLATFORM
    • Yugabyte Platform
      • Overview
        • Install
        • Configure
      • Install Yugabyte Platform
        • Prerequisites
        • Prepare the environment
        • Install software
        • Prepare nodes (on-prem)
        • Uninstall software
      • Configure Yugabyte Platform
        • Create admin user
        • Configure the cloud provider
        • Configure the backup target
        • Configure alerts and health checking
        • Create and edit instance tags
      • Create deployments
        • Multi-zone universe
        • Multi-region universe
        • Read replica cluster
      • Manage deployments
        • Start and stop processes
        • Add a node
        • Enable high availability
        • Remove a node
        • Edit a universe
        • Edit configuration flags
        • Upgrade the YugabyteDB software
        • Delete a universe
        • Migrate to Helm 3
      • Back up and restore universes
        • Configure backup storage
        • Back up universe data
        • Restore universe data
        • Schedule data backups
      • Security
        • Security checklist
        • Customize ports
        • Authorization platform
        • Create a KMS configuration
        • Enable encryption at rest
        • Enable encryption in transit (TLS)
        • Network security
      • Alerts and monitoring
        • Live Queries dashboard
        • Slow Queries dashboard
      • Troubleshoot
        • Install and upgrade issues
        • Universe issues
      • Administer Yugabyte Platform
        • Back up and restore Yugabyte Platform
        • Back up and restore Yugabyte Platform - K8s
  • YUGABYTE CLOUD
    • Yugabyte Cloud
      • Free tier
      • Create clusters
      • Monitor clusters
      • Create databases
      • Manage database access
      • Connect to clusters
  • REFERENCE
    • Reference
    • Architecture
      • Design goals
      • Key concepts
        • Universe
        • YB-TServer Service
        • YB-Master Service
      • Core functions
        • Universe creation
        • Table creation
        • Write IO path
        • Read IO path
        • High availability
      • Layered architecture
      • Query layer
        • Overview
      • DocDB transactions layer
        • Transactions overview
        • Transaction isolation levels
        • Explicit locking
        • Single-row transactions
        • Distributed transactions
        • Transactional IO path
      • DocDB sharding layer
        • Hash & range sharding
        • Tablet splitting
        • Colocated tables
      • DocDB replication layer
        • Replication
        • xCluster replication
        • Read replicas
        • Change data capture (CDC)
      • DocDB storage layer
        • Persistence
        • Performance
    • APIs
      • YSQL
        • The SQL language
          • SQL statements
            • ABORT
            • ALTER DATABASE
            • ALTER DEFAULT PRIVILEGES
            • ALTER DOMAIN
            • ALTER GROUP
            • ALTER POLICY
            • ALTER ROLE
            • ALTER SEQUENCE
            • ALTER TABLE
            • ALTER USER
            • BEGIN
            • CALL
            • COMMENT
            • COMMIT
            • COPY
            • CREATE AGGREGATE
            • CREATE CAST
            • CREATE DATABASE
            • CREATE DOMAIN
            • CREATE EXTENSION
            • CREATE FUNCTION
            • CREATE GROUP
            • CREATE INDEX
            • CREATE OPERATOR
            • CREATE OPERATOR CLASS
            • CREATE POLICY
            • CREATE PROCEDURE
            • CREATE ROLE
            • CREATE RULE
            • CREATE SCHEMA
            • CREATE SEQUENCE
            • CREATE TABLE
            • CREATE TABLE AS
            • CREATE TRIGGER
            • CREATE TYPE
            • CREATE USER
            • CREATE VIEW
            • DEALLOCATE
            • DELETE
            • DO
            • DROP AGGREGATE
            • DROP CAST
            • DROP DATABASE
            • DROP DOMAIN
            • DROP EXTENSION
            • DROP FUNCTION
            • DROP GROUP
            • DROP OPERATOR
            • DROP OPERATOR CLASS
            • DROP OWNED
            • DROP POLICY
            • DROP PROCEDURE
            • DROP ROLE
            • DROP RULE
            • DROP SEQUENCE
            • DROP TABLE
            • DROP TRIGGER
            • DROP TYPE
            • DROP USER
            • END
            • EXECUTE
            • EXPLAIN
            • GRANT
            • INSERT
            • LOCK
            • PREPARE
            • REASSIGN OWNED
            • RESET
            • REVOKE
            • ROLLBACK
            • SELECT
            • SET
            • SET CONSTRAINTS
            • SET ROLE
            • SET SESSION AUTHORIZATION
            • SET TRANSACTION
            • SHOW
            • SHOW TRANSACTION
            • TRUNCATE
            • UPDATE
            • VALUES
          • WITH clause
            • WITH clause—SQL syntax and semantics
            • recursive CTE
            • case study—traversing an employee hierarchy
            • traversing general graphs
              • graph representation
              • common code
              • undirected cyclic graph
              • directed cyclic graph
              • directed acyclic graph
              • rooted tree
              • Unique containing paths
              • Stress testing find_paths()
            • case study—Bacon Numbers from IMDb
              • Bacon numbers for synthetic data
              • Bacon numbers for IMDb data
        • Data types
          • Array
            • array[] constructor
            • Literals
              • Text typecasting and literals
              • Array of primitive values
              • Row
              • Array of rows
            • FOREACH loop (PL/pgSQL)
            • array of DOMAINs
            • Functions and operators
              • ANY and ALL
              • Array comparison
              • Array slice operator
              • Array concatenation
              • Array properties
              • array_agg(), unnest(), generate_subscripts()
              • array_fill()
              • array_position(), array_positions()
              • array_remove()
              • array_replace() / set value
              • array_to_string()
              • string_to_array()
          • Binary
          • Boolean
          • Character
          • Date and time
          • JSON
            • JSON literals
            • Primitive and compound data types
            • Code example conventions
            • Indexes and check constraints
            • Functions & operators
              • ::jsonb, ::json, ::text (typecast)
              • ->, ->>, #>, #>> (JSON subvalues)
              • - and #- (remove)
              • || (concatenation)
              • = (equality)
              • @> and <@ (containment)
              • ? and ?| and ?& (key or value existence)
              • array_to_json()
              • jsonb_agg()
              • jsonb_array_elements()
              • jsonb_array_elements_text()
              • jsonb_array_length()
              • jsonb_build_object()
              • jsonb_build_array()
              • jsonb_each()
              • jsonb_each_text()
              • jsonb_extract_path()
              • jsonb_extract_path_text() and json_extract_path_text()
              • jsonb_object()
              • jsonb_object_agg()
              • jsonb_object_keys()
              • jsonb_populate_record()
              • jsonb_populate_recordset()
              • jsonb_pretty()
              • jsonb_set() and jsonb_insert()
              • jsonb_strip_nulls()
              • jsonb_to_record()
              • jsonb_to_recordset()
              • jsonb_typeof()
              • row_to_json()
              • to_jsonb()
          • Money
          • Numeric
          • Range
          • Serial
          • UUID
        • Functions and operators
          • Aggregate functions
            • Informal functionality overview
            • Invocation syntax and semantics
            • grouping sets, rollup, cube
            • Per function signature and purpose
              • avg(), count(), max(), min(), sum()
              • array_agg(), string_agg(), jsonb_agg(), jsonb_object_agg()
              • bit_and(), bit_or(), bool_and(), bool_or()
              • variance(), var_pop(), var_samp(), stddev(), stddev_pop(), stddev_samp()
              • linear regression
                • covar_pop(), covar_samp(), corr()
                • regr_%()
              • mode(), percentile_disc(), percentile_cont()
              • rank(), dense_rank(), percent_rank(), cume_dist()
            • case study—percentile_cont() and the "68–95–99.7" rule
            • case study—linear regression on COVID data
              • Download the COVIDcast data
              • Ingest the COVIDcast data
                • Inspect the COVIDcast data
                • Copy the .csv files to staging tables
                • Check staged data conforms to the rules
                • Join the staged data into a single table
                • SQL scripts
                  • Create cr_staging_tables()
                  • Create cr_copy_from_scripts()
                  • Create assert_assumptions_ok()
                  • Create xform_to_covidcast_fb_survey_results()
                  • ingest-the-data.sql
              • Analyze the COVIDcast data
                • symptoms vs mask-wearing by day
                • Data for scatter-plot for 21-Oct-2020
                • Scatter-plot for 21-Oct-2020
                • SQL scripts
                  • analysis-queries.sql
                  • synthetic-data.sql
          • currval()
          • lastval()
          • nextval()
          • Window functions
            • Informal functionality overview
            • Invocation syntax and semantics
            • Per function signature and purpose
              • row_number(), rank() and dense_rank()
              • percent_rank(), cume_dist() and ntile()
              • first_value(), nth_value(), last_value()
              • lag(), lead()
              • Tables for the code examples
                • table t1
                • table t2
                • table t3
                • table t4
            • case study—analyzing a normal distribution
              • Bucket allocation scheme
              • do_clean_start.sql
              • cr_show_t4.sql
              • cr_dp_views.sql
              • cr_int_views.sql
              • cr_pr_cd_equality_report.sql
              • cr_bucket_using_width_bucket.sql
              • cr_bucket_dedicated_code.sql
              • do_assert_bucket_ok
              • cr_histogram.sql
              • cr_do_ntile.sql
              • cr_do_percent_rank.sql
              • cr_do_cume_dist.sql
              • do_populate_results.sql
              • do_report_results.sql
              • do_compare_dp_results.sql
              • do_demo.sql
              • Reports
                • Histogram report
                • dp-results
                • compare-dp-results
                • int-results
        • Extensions
        • Keywords
        • Reserved names
      • YCQL
        • ALTER KEYSPACE
        • ALTER ROLE
        • ALTER TABLE
        • CREATE INDEX
        • CREATE KEYSPACE
        • CREATE ROLE
        • CREATE TABLE
        • CREATE TYPE
        • DROP INDEX
        • DROP KEYSPACE
        • DROP ROLE
        • DROP TABLE
        • DROP TYPE
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        • REVOKE ROLE
        • USE
        • INSERT
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        • TRUNCATE
        • Simple expressions
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        • Operators
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        • Collection
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        • Integer and counter
        • Non-integer
        • TEXT
        • DATE, TIME, and TIMESTAMP
        • UUID and TIMEUUID
        • JSONB
        • Date and time
        • BATCH
    • CLIs
      • yb-ctl
      • yb-docker-ctl
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      • ycqlsh
      • yb-admin
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      • ysql_dumpall
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    • Drivers
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    • Third party tools
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      • Visual Studio Code
    • Sample datasets
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  • RELEASES
    • Releases
    • Releases overview
    • Release versioning
    • What's new
      • v2.5 (latest)
      • v2.4 (stable)
    • Earlier releases
      • v2.3.3
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      • v2.2.0 series
      • v2.1.8
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      • v1.2.10
      • v1.2.9
      • v1.2.8
      • v1.2.6
      • v1.2.5
      • v1.2.4
  • FAQ
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> Earlier releases >

v2.1.8 release notes

  • Downloads
    • Binaries
    • Docker
  • YSQL
  • YCQL
  • YEDIS
  • System improvements
  • Yugabyte Platform

Released: June 19, 2020 (2.1.8.2-b1).

New to YugabyteDB? Follow Quick start to get started and running in less than five minutes.

Looking for earlier releases? Release notes for earlier releases are available in Earlier releases.

Downloads

Binaries

     

Docker

docker pull yugabytedb/yugabyte:2.1.8.2-b1

YSQL

  • Add support for SPLIT INTO clause for CREATE INDEX statement. #3047
  • Fix aggregate functions pushdown for columns with default values added after table creation. #4376
  • Resolve timeout frequently encountered whe batch-loading data in YSQL by using client-specified timeouts for RPC requests instead of hardcoded values. #4045
  • Fix incorrect cross-component dependency in DocDB found in builds using ninja. #4474
  • Fix operation buffering in stored procedures to handle transactions correctly. #4268
  • [DocDB] Ensure that fast path (pushed down) single row writes honor higher priority transactions and get aborted or retired instead. #4316
  • [DocDB] Split copy table operations into smaller chunks (using byte size instead of count) for CREATE DATABASE statement. #3743
  • Correctly push down IS NULL condition to DocDB. #4499
  • Avoid ASAN failures after a large data set is uploaded by rearranging files and test functionalities. #4488
  • Fix memory leaks by using memory context to manage object alloc and free. #4490
  • Fix multi-touch cache and improve caching logic for read and write operations. #4379
  • Improve index cost estimates by considering index uniqueness, included columns (index scan vs. index only scan), scan direction, and partial indexes. Also, disable merge joins for unsupported cases. #4494 and #4496
  • Add support for deferrable foreign key constraints. #3995
  • Prevent dropping primary key constraint. #3163
  • Push down SELECT (), for example, SELECT COUNT(1) , to DocDB. #4276
  • Fix rare core dumps due to concurrency issues in metrics webserver during shutdown. #4092

YCQL

  • Rename cqlsh to ycqlsh. #3935
  • Update Cassandra Java driver version to 3.8.0-yb-4 and adds support for guava 26 or later. The latest release of the driver is available in the Yugabyte cassandra-java-driver repository. #3897
  • YB-TServers should not crash when attempting to log in using YCQL authentication without a password. #4459
  • Performance degradation in CassandraSecondaryIndex workload resolved. #4401
  • Add yb-admin import_snapshot support for renaming a few tables (not all), but the specified name is equal to the old table name: yb-admin import_snapshot <meta-file> ks old_table_name. #4280
  • For DDL creation with Spring Data Cassandra, change the Enum value from JSON to JSONB to allow schema creation to succeed programmatically involving JSON column types and update the cassandra-java-driver to 3.8.0-yb-5. #4481
  • Use the same timestamp for current time to compute multiple runtimes in output of <tserver-ip>:13000/rpcz. #4418
  • Correctly push down = NULL condition to DocDB. #4499
  • Reduce YCQL unprepared statement execution time by up to 98% (example: reduced time to insert a 5 MB string from 18 seconds to 0.25 seconds). #4397 and #3586
    • Special thanks to @ouvai59 for your contribution!

YEDIS

  • For yugabyted, do not start redis server by default. Resolves port conflict during startup. #4057

System improvements

  • New yb-admin command get_load_balancer_state to get the cluster load balancer state. #4509
  • Avoid creating intent iterator when no transactions are running. #4500
  • Increase default memory limit for yb-master for running in low-memory setups (<=4 GB). #3742
  • Improve RocksDB checkpoint directory cleanup if a tserver crashes or is restarted while performing a snapshot operation. #4352
  • [DocDB] Use bloom filters for range-partitioned tables. The first primary key column is added to the bloom filter. #4437
  • [DocDB] Fix snapshots bootstrap order bu altering the load for transaction-aware snapshots. #4470
  • [DocDB] Add [yb-admin master_leader_stepdown](../../../x admin/yb-admin/#master-leader-stepdown) command. #4135
  • [DocDB] Reduce impact on CPU and throughput during node failures. #4042
  • [DocDB] Add yb-ts-cli commands, flush_all_tablets and flush_tablet <tablet_id>, to flush tablets. When used with rolling restarts, less time is spent applying WAL records to rocksdb. #2785
    • Special thanks to mirageyjd for your contribution.
  • [DocDB] Fix deadlock during tablet splitting. #4312
  • Introduced load balancing throttle on the total number of tablets being remote bootstrapped, across the cluster. #4053 and #4436
  • [DocDB] Remove applied intent doc hybrid time during compaction. #4535
  • [DocDB] Fixed BoundedRocksDbIterator::SeekToLast works incorrectly for 2nd post-split tablet. #4542
  • [DocDB] Abort snapshot if table was deleted. #4610
  • [DocDB] Backfill index without waiting indefinitely for pending transactions. #3471
  • [DocDB] Fix yb-master rerunning snapshot operations after upgrade. #4816
  • [Colocation] During load balancing operations, load balance each colocated tablet once. This fix removes unnecessary load balancing for every user table sharing that table and the parent table.
  • Fix YB-Master hangs due to transaction status resolution. #4410
  • Redirect the master UI to the master leader UI without failing when one master is down. #4442 and #3869
  • Avoid race in change_metadata_operation. Use atomic<P*> to avoid race between Finish() and ToString from updating or accessing request. #3912
  • Refactor RaftGroupMetadata to avoid keeping unnecessary TableInfo objects in memory. #4354
  • Fix missing rows in unidirectional replication and fix race conditions with CDC and TransactionManager. #4257
  • Change intent iterator creation logic. #4543
  • Upgrade all Python scripts used to build and package the code to Python 3. #1442

Yugabyte Platform

  • Fix failure when adding a node on a TLS-enabled universe. #4482
  • Improve latency tracking by splitting overall operation metrics into individual rows for each API. #3825
    • YCQL and YEDIS metrics include ops, avg latency, and P99 latency.
    • YSQL metrics include only ops and avg latency.
  • Add metrics for RPC queue sizes of services, including YB-Master, YB-TServer, YCQL, and YEDIS. #4294
  • Add option to edit configuration flags without requiring server restart. #4433
  • When configuration flags are deleted in the YugabyteDB Admin Console, remove the flags from server.conf file. #4341
  • When creating GCP instances, only use host project when specifying network.
  • When creating a cloud provider configuration, display provider-level (non-k8s) settings for SSH ports and enabling airgapped installations. #3615, #4243, and #4240.
  • After removing a node and then adding a node, check for certificate and key files and create the files if needed. #4551
  • Update to support Helm 3 deployments. Note: Helm 2 is no longer supported. For migrating existing Helm 2 universes to Helm 3, see Migrate from Helm 2 to Helm 3. #4416
  • Change QLTableRow representation. #4427
  • Fix CDC-related race conditions using CDCServiceTxnTest.TestGetChangesForPendingTransaction. #4544
  • Revert validation on alerting email field to allow comma-separated emails in the form. #4639
  • Add Custom SMTP Configuration section to Health & Alerting tab on customer profile page. #4443
  • Fix Kubernetes pod container metrics not displaying in Metrics panel. #4652
  • Fix Backups tab not rendering when there are no backups. #4661

Note

Prior to version 2.0, YSQL was still in beta. As a result, the 2.0 release included a backward-incompatible file format change for YSQL. If you have an existing cluster running releases earlier than 2.0 with YSQL enabled, then you will not be able to upgrade to version 2.0+. Export from your existing cluster and then import into a new cluster (v2.0 or later) to use existing data.
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