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-rw-r--r--doc/src/sgml/ref/create_table.sgml7
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/src/sgml/ref/create_table.sgml b/doc/src/sgml/ref/create_table.sgml
index 6262533c57b..1a1adc5ae87 100644
--- a/doc/src/sgml/ref/create_table.sgml
+++ b/doc/src/sgml/ref/create_table.sgml
@@ -1206,6 +1206,13 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
</para>
<para>
+ For each pair of referencing and referenced column, if they are of a
+ collatable data type, then the collations must either be both
+ deterministic or else both the same. This ensures that both columns
+ have a consistent notion of equality.
+ </para>
+
+ <para>
The user
must have <literal>REFERENCES</literal> permission on the referenced
table (either the whole table, or the specific referenced columns). The