concat function

Returns the concatenation of the arguments.

Syntax

concat(expr1, expr2 [, ...] )

Arguments

  • exprN: Expressions which are all STRING, all BINARY or all ARRAYs of STRING or BINARY.

Returns

The result type matches the argument types.

There must be at least one argument. This function is a synonym for || (pipe pipe sign) operator.

Examples

> SELECT concat('Spark', 'SQL');
 SparkSQL
> SELECT concat(array(1, 2, 3), array(4, 5), array(6));
 [1,2,3,4,5,6]