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# alf-explain Show the logical (optimizer) and physical (compiler) plans of a query. ## Synopsis `alf` explain *QUERY* ## Description This command prints the logical and physical query plans for QUERY to standard output: * The logical plan is post-optimizer and allows checking that the latter performs correctly. * The physical plan provides information about compilation. In particular it provides feedback about the effective delegation to underlying database engines, as well as involved SQL queries. ## Example `alf` `--examples` explain "restrict(suppliers, city: 'London')"
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6 entries across 6 versions & 1 rubygems