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enable empty/notEmpty for map data type
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@ -96,12 +96,6 @@ public:
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}
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else if (const ColumnMap* col_map = checkAndGetColumn<ColumnMap>(column.get()))
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{
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// only function length is implemented for ColumnMap
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// TODO implemented other functions which use FunctionStringOrArrayToT
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if (getName() != "length")
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throw Exception("Illegal column " + arguments[0].column->getName() + " of argument of function " + getName(),
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ErrorCodes::ILLEGAL_COLUMN);
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auto col_res = ColumnVector<ResultType>::create();
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typename ColumnVector<ResultType>::Container & vec_res = col_res->getData();
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vec_res.resize(col_map->size());
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@ -1,2 +1,6 @@
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2
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2
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0
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0
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1
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1
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0
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@ -1,6 +1,8 @@
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set allow_experimental_map_type = 1;
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drop table if exists table_map;
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create table table_map (a Map(String, String)) engine = Memory;
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insert into table_map values ({'name':'zhangsan', 'gender':'male'}), ({'name':'lisi', 'gender':'female'});
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select length(a) from table_map;
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select length(map(1,2,3,4));
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select length(map());
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select empty(map(1,2,3,4));
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select empty(map());
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select notEmpty(map(1,2,3,4));
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select notEmpty(map());
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