1/8/2024 0 Comments Sql redshift data typesCasts between string and timestamp types assume standard SQL formatting, e.g. Can include multi-value strings as well.ĭECIMAL uses floating point, not fixed point mathĭruid FLOAT columns are reported as FLOATĭruid DOUBLE columns are reported as DOUBLEĭruid LONG columns (except _time) are reported as BIGINTĭruid's _time column is reported as TIMESTAMP. To non-nullable types will also be substituted with a default value (for example, nulls cast to numbers will beĭruid STRING columns are reported as VARCHAR. If a value cannot be properlyĬast to another value, as in CAST('foo' AS BIGINT), the runtime will substitute a default value. SQL types that have different Druid runtime types will generate a runtime cast in Druid. That have the same Druid runtime type will have no effect, other than exceptions noted in the table. The following table describes how Druid maps SQL types onto native types at query runtime. Time functions section for more information about timestamp handling. Timezone information, but only carry information about the exact moment in time they represent. Therefore, timestamps in Druid do not carry any Milliseconds since 00:00:00 UTC, not counting leap seconds. Timestamps (including the _time column) are treated by Druid as longs, with the value being the number of HyperUnique and approxHistogram columns). Standard typesĭruid natively supports five basic column types: "long" (64 bit signed int), "float" (32 bit float), "double" (64 bitįloat) "string" (UTF-8 encoded strings and string arrays), and "complex" (catch-all for more exotic data types like This topic describes supported data types in Druid SQL. This document describes the SQL language.Ĭolumns in Druid are associated with a specific data type. Moment Sketches for Approximate Quantiles moduleĪpache Druid supports two query languages: Druid SQL and native queries.Key/Value Stores (HBase/Cassandra/OpenTSDB)
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