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« Operators: Array Scripts »
Elastic Docs ›Painless Scripting Language [7.9] ›Painless Language Specification

Statements

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Statements

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Painless supports all of Java’s control flow statements except the switch statement.

Conditional statements

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If / Else

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if (doc[item].size() == 0) {
  // do something if "item" is missing
} else if (doc[item].value == 'something') {
  // do something if "item" value is: something
} else {
  // do something else
}

Loop statements

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For

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Painless also supports the for in syntax:

for (def item : list) {
  // do something
}
for (item in list) {
  // do something
}

While

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while (ctx._source.item < condition) {
  // do something
}

Do-While

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do {
  // do something
}
while (ctx._source.item < condition)
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