Correct several misspellings

Author: huyuanfeng2018

cassandra/src/test/resources/cassandra.yaml

@@ -297,7 +297,7 @@ commit_failure_policy: stop
 # i.e. use bind markers for variable parts.
 #
 # Do only change the default value, if you really have more prepared statements than
-# fit in the cache. In most cases it is not neccessary to change this value.
+# fit in the cache. In most cases it is not necessary to change this value.
 # Constantly re-preparing statements is a performance penalty.
 #
 # Default value ("auto") is 1/256th of the heap or 10MB, whichever is greater

core/src/main/java/org/apache/calcite/sql/advise/SqlSimpleParser.java

@@ -297,7 +297,7 @@ private Token parseQuotedIdentifier() {
         ++pos;
         if (c == closeQuote) {
           if (pos < sql.length() && sql.charAt(pos) == closeQuote) {
-            // Double close means escaped closing quote is a part of identifer
+            // Double close means escaped closing quote is a part of identifier
             ++pos;
             continue;
           }

core/src/main/java/org/apache/calcite/sql/dialect/Db2SqlDialect.java

@@ -81,7 +81,7 @@ public Db2SqlDialect(Context context) {
     // A duration is a positive or negative number representing an interval of time.
     // If one operand is a date, the other labeled duration of YEARS, MONTHS, or DAYS.
     // If one operand is a time, the other must be labeled duration of HOURS, MINUTES, or SECONDS.
-    // If one operand is a timestamp, the other operand can be any of teh duration.
+    // If one operand is a timestamp, the other operand can be any duration.
 
     SqlIntervalLiteral.IntervalValue interval =
         literal.getValueAs(SqlIntervalLiteral.IntervalValue.class);

core/src/main/java/org/apache/calcite/sql/util/SqlBuilder.java

@@ -30,7 +30,7 @@
  *
  * <p>Using this class helps to prevent SQL injection attacks, incorrectly
  * quoted identifiers and strings. These problems occur when you build SQL by
- * concatenating strings, and you forget to treat identifers and string literals
+ * concatenating strings, and you forget to treat identifiers and string literals
  * correctly. SqlBuilder has special methods for appending identifiers and
  * literals.
  */

core/src/test/resources/sql/cast-with-format.iq

@@ -2860,7 +2860,7 @@ select cast(cast("1985-12-02" as date) as varchar format "\"free text\"");
 No datetime tokens provided.
 !error
 
-# FX modifier not at the begining of the format.
+# FX modifier not at the beginning of the format.
 select cast("2001-03-01 00:10:02" as timestamp format
     "YYYY-MM-DD FXHH12:MI:SS");
 FX modifier should be at the beginning of the format string.

site/_docs/history.md

@@ -1577,7 +1577,7 @@ other software versions as specified in gradle.properties.
   `AssertionError`: "Conversion to relational algebra failed to preserve datatypes"
   when union `VARCHAR` literal and `CAST(null AS INTEGER)`
 * [<a href="https://issues.apache.org/jira/browse/CALCITE-6178">CALCITE-6178</a>]
-  `WITH RECURSIVE` query when cloned using `SqlShuttle` looses `RECURSIVE` property
+  `WITH RECURSIVE` query when cloned using `SqlShuttle` loses `RECURSIVE` property
 * [<a href="https://issues.apache.org/jira/browse/CALCITE-6332">CALCITE-6332</a>]
   Optimization `CoreRules.AGGREGATE_EXPAND_DISTINCT_AGGREGATES_TO_JOIN` produces
   incorrect results for aggregates with groupSets