Query Options for the SET Statement
You can specify the following options using the SET statement, and those settings affect all queries issued from that session.
Some query options are useful in day-to-day operations for improving usability, performance, or flexibility.
Other query options control special-purpose aspects of Impala operation and are intended primarily for advanced debugging or troubleshooting.
Options with Boolean parameters can be set to 1 or true to enable, or 0 or false to turn off.
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- ABORT_ON_DEFAULT_LIMIT_EXCEEDED
- ABORT_ON_ERROR
- ALLOW_UNSUPPORTED_FORMATS
- APPX_COUNT_DISTINCT
- BATCH_SIZE
- COMPRESSION_CODEC
- DEBUG_ACTION
- DEFAULT_ORDER_BY_LIMIT
- DISABLE_CODEGEN
- DISABLE_ROW_RUNTIME_FILTERING
- DISABLE_STREAMING_PREAGGREGATIONS
- DISABLE_UNSAFE_SPILLS
- EXEC_SINGLE_NODE_ROWS_THRESHOLD
- EXPLAIN_LEVEL
- HBASE_CACHE_BLOCKS
- HBASE_CACHING
- LIVE_PROGRESS
- LIVE_SUMMARY
- MAX_ERRORS
- MAX_IO_BUFFERS
- MAX_SCAN_RANGE_LENGTH
- MAX_NUM_RUNTIME_FILTERS
- MEM_LIMIT
- MT_DOP
- NUM_NODES
- NUM_SCANNER_THREADS
- OPTIMIZE_PARTITION_KEY_SCANS
- PARQUET_COMPRESSION_CODEC
- PARQUET_ANNOTATE_STRINGS_UTF8
- PARQUET_FALLBACK_SCHEMA_RESOLUTION
- PARQUET_FILE_SIZE
- PREFETCH_MODE
- QUERY_TIMEOUT_S
- REQUEST_POOL
- REPLICA_PREFERENCE
- RESERVATION_REQUEST_TIMEOUT
- RUNTIME_BLOOM_FILTER_SIZE
- RUNTIME_FILTER_MAX_SIZE
- RUNTIME_FILTER_MIN_SIZE
- RUNTIME_FILTER_MODE
- RUNTIME_FILTER_WAIT_TIME_MS
- S3_SKIP_INSERT_STAGING
- SCAN_NODE_CODEGEN_THRESHOLD
- SCHEDULE_RANDOM_REPLICA
- SCRATCH_LIMIT
- SUPPORT_START_OVER
- SYNC_DDL
- V_CPU_CORES
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