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# 7.27.1.11. grn_expr

grn_expr is an `grn_obj` that represents an expression. Here is a list of what expression can do:

> - Expression can apply some operations to a record by `grn_expr_exec()`.

> - Expression can represents search condition. `grn_table_select()` can select records that match against the search condition represented by expression.

There are two string representations of expression:

> - Query syntax

> - Script syntax

`grn_expr_parse()` parses string represented expression and appends the parsed expression to another expression.

## 7.27.1.11.1. Example

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## 7.27.1.11.2. Reference

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