fix(mysql): use char_length for all length calls

Author: cpcloud

ibis/backends/sql/compilers/mysql.py

@@ -220,7 +220,7 @@ def visit_FindInSet(self, op, *, needle, values):
 
     def visit_EndsWith(self, op, *, arg, end):
         to = sge.DataType(this=sge.DataType.Type.BINARY)
-        return self.f.right(arg, self.f.char_length(end)).eq(sge.Cast(this=end, to=to))
+        return self.f.right(arg, self.f.length(end)).eq(sge.Cast(this=end, to=to))
 
     def visit_StartsWith(self, op, *, arg, start):
         to = sge.DataType(this=sge.DataType.Type.BINARY)

ibis/backends/sql/dialects.py

@@ -363,6 +363,7 @@ class Generator(TSQL.Generator):
     sge.RegexpLike: (
         lambda _, e: f"({e.this.sql('mysql')} RLIKE {e.expression.sql('mysql')})"
     ),
+    sge.Length: rename_func("char_length"),
 }