PostgreSQL Error 2201E: Invalid Argument for Logarithm
PostgreSQL error 2201E (invalid_argument_for_logarithm) is thrown when a logarithmic function — LN(), LOG(), or LOG10() — receives an argument that is zero or negative. Mathematically, logarithms are only defined for strictly positive real numbers, so PostgreSQL enforces this domain rule at runtime. This error commonly surfaces in analytical queries involving financial data, scientific calculations, or any numeric pipeline where input values aren't fully validated.
Top 3 Causes
1. Passing Zero or Negative Values Directly
The most straightforward cause: calling a log function with a literal 0 or a negative number, or with a column that happens to contain such values.
