Teodor Sigaev <[EMAIL PROTECTED]> writes: > 9.17.5. Row-wise Comparison > "These constructs test a row value for null or not null. A row value is > considered not null if it has at least one field that is not null."
Wups, I missed that part of the docs, will fix. Thanks.
regards, tom lane
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
