If you’re getting an error that reads something like ‘column “c1” cannot be cast automatically to type text[]‘ in PostgreSQL, it could be that you’re trying to change a column’s type to one where the existing type can’t be implicitly cast to.
To fix this issue, try explicitly casting the column to the desired data type.
Continue readingIf you’re getting an error that reads “function array_sample(numeric, integer) does not exist” when using the array_sample() function in PostgreSQL, it’s probably because your first argument is a numeric type instead of an array.
The first argument for this function must be an array.
To fix this error, be sure that your first argument to array_sample() is an array, not a numeric value.
If you’re getting an error that reads “function array_shuffle(integer) does not exist” when using the array_shuffle() function in PostgreSQL, it’s probably because the argument you’re passing to the function is not an array.
More specifically, this error message implies that you’re passing an integer. The same error can occur when passing other non-array types (such as numeric), but the solution is the same.
The argument for this function must be an array.
To fix this error, replace the integer value with an array value when calling the array_shuffle() function.
If you’re getting an error that reads “negative substring length not allowed” when using PostgreSQL’s overlay() function, it’s probably because you’re passing a negative value (or zero) to the FROM argument.
To fix this issue, be sure that the FROM argument is a positive integer.
If you’re getting an error that reads “source array too small” when updating an array in PostgreSQL, it’s probably because you’re passing a slice that’s smaller than your specified range. For example, if you specify a range that covers four elements but provide an array that contains just three elements, then you’d get this error.
To fix the error, be sure to provide an an array that contains at least as many elements as are specified in the range.
Continue readingIf you’re getting an error that reads “function array_shuffle(integer, integer) does not exist” when using the array_shuffle() function in PostgreSQL, it’s probably because the argument you’re passing to the function is not an array.
Actually, the error message implies that you’re passing multiple integer values (two in this case, but it could be more), separated by a comma. Perhaps you’re trying to pass an array of integers, but you haven’t provided them in an array. Or perhaps you’re passing the wrong column or variable. Either way, the argument for this function must be an array.
To fix this error, replace the integer values with a single array value when calling the array_shuffle() function.
If you’re getting a PostgreSQL error that reads “op ANY/ALL (array) requires array on right side” it’s probably because you’re passing a non array to the ANY() or ALL() construct.
These constructs require an array to be included in the parentheses, and so passing a non array returns an error.
To fix this issue, be sure to pass an array when using these functions.
Continue readingIf you’re getting an error that reads ‘date field value out of range‘ in PostgreSQL while using the make_date() function, it’s probably because one or more of the date parts you’re providing is out of range for that date part.
It’s possible that you’ve got the month and day in the wrong order.
To fix this issue, be sure that each date part you provide is within the valid range for that date part. It may be that all you need to do is switch the day and the month around.
Continue readingIf you’re getting a PostgreSQL error that reads “function generate_subscripts(numeric, integer) does not exist“, it’s probably because your first argument is not an array. This specific error message implies that the first argument is a numeric value, but we’d get a similar error when passing an integer.
The first argument for this function must be an array.
To fix this error, be sure that your first argument to generate_subscripts() is an array.
If you’re getting a PostgreSQL error that reads “searching for elements in multidimensional arrays is not supported“, it’s probably because you’re trying to perform an operation against a multi dimensional array when that operation only supports one dimensional arrays.
To fix this issue, perform the operation against a one dimensional array instead. You may be able to do this by applying the unnest() function against the multi dimensional array.