project-reorder operator

Reorders columns in the result output.

T | project-reorder Col2, Col1, Col* asc

Syntax

T | project-reorder ColumnNameOrPattern [asc | desc | granny-asc | granny-desc] [, ...]

Arguments

• T: The input table.
• ColumnNameOrPattern: The name of the column or column wildcard pattern added to the output.
• For wildcard patterns: Specifying asc or desc orders columns using their names in ascending or descending manner. Additionally, granny-asc and granny-desc keywords indicate ascending or descending order that takes numeric values into account (for example, a100 comes before a20 when granny-asc is specified.) If no explicit ordering is specified, the order is determined by the matching columns as they appear in the source table.

Note

• In ambiguous ColumnNameOrPattern matching, the column appears in the first position matching the pattern.
• Specifying columns for the project-reorder is optional. Columns that aren't specified explicitly appear as the last columns of the output table.
• To remove columns, use project-away.
• To choose which columns to keep, use project-keep.
• To rename columns, use project-rename.

Returns

A table that contains columns in the order specified by the operator arguments. project-reorder doesn't rename or remove columns from the table, therefore, all columns that existed in the source table, appear in the result table.

Examples

Reorder a table with three columns (a, b, c) so the second column (b) will appear first.

print a='a', b='b', c='c'
|  project-reorder b

b	a	c
b	a	c

Reorder columns of a table so that columns starting with a will appear before other columns.

print b = 'b', a2='a2', a3='a3', a1='a1'
|  project-reorder a* asc

a1	a2	a3	b
a1	a2	a3	b