Add Value.getSQL(StringBuilder)

h2/src/main/org/h2/api/Interval.java

@@ -628,7 +628,8 @@ public final class Interval {
 
     @Override
     public String toString() {
-        return IntervalUtils.intervalToString(qualifier, negative, leading, remaining);
+        return IntervalUtils.appendInterval(new StringBuilder(), getQualifier(), negative, leading, remaining)
+                .toString();
     }
 
 }

h2/src/main/org/h2/api/TimestampWithTimeZone.java

@@ -7,6 +7,7 @@ package org.h2.api;
 
 import java.io.Serializable;
 import org.h2.util.DateTimeUtils;
+import org.h2.value.ValueTimestampTimeZone;
 
 /**
  * How we expose "TIMESTAMP WITH TIME ZONE" in our ResultSets.
@@ -109,7 +110,9 @@ public class TimestampWithTimeZone implements Serializable, Cloneable {
 
     @Override
     public String toString() {
-        return DateTimeUtils.timestampTimeZoneToString(dateValue, timeNanos, timeZoneOffsetMins);
+        StringBuilder builder = new StringBuilder(ValueTimestampTimeZone.MAXIMUM_PRECISION);
+        DateTimeUtils.appendTimestampTimeZone(builder, dateValue, timeNanos, timeZoneOffsetMins);
+        return builder.toString();
     }
 
     @Override

h2/src/main/org/h2/command/Prepared.java

@@ -405,7 +405,7 @@ public abstract class Prepared {
         for (Value v : values) {
             buff.appendExceptFirst(", ");
             if (v != null) {
-                buff.append(v.getSQL());
+                v.getSQL(buff.builder());
             }
         }
         return buff.toString();

h2/src/main/org/h2/command/dml/ScriptCommand.java

@@ -422,10 +422,10 @@ public class ScriptCommand extends ScriptBase {
                         id = writeLobStream(v);
                         buff.append("SYSTEM_COMBINE_BLOB(").append(id).append(')');
                     } else {
-                        buff.append(v.getSQL());
+                        v.getSQL(buff.builder());
                     }
                 } else {
-                    buff.append(v.getSQL());
+                    v.getSQL(buff.builder());
                 }
             }
             buff.append(')');

h2/src/main/org/h2/expression/Expression.java

@@ -111,9 +111,7 @@ public abstract class Expression {
      * @return the SQL statement
      */
     public String getSQL() {
-        StringBuilder builder = new StringBuilder();
-        getSQL(builder);
-        return builder.toString();
+        return getSQL(new StringBuilder()).toString();
     }
 
     /**

h2/src/main/org/h2/expression/ValueExpression.java

@@ -147,7 +147,7 @@ public class ValueExpression extends Expression {
         if (this == DEFAULT) {
             builder.append("DEFAULT");
         } else {
-            builder.append(value.getSQL());
+            value.getSQL(builder);
         }
         return builder;
     }

h2/src/main/org/h2/schema/Constant.java

@@ -38,7 +38,8 @@ public class Constant extends SchemaObjectBase {
 
     @Override
     public String getCreateSQL() {
-        return "CREATE CONSTANT " + getSQL() + " VALUE " + value.getSQL();
+        StringBuilder builder = new StringBuilder().append("CREATE CONSTANT ").append(getSQL()).append(" VALUE ");
+        return value.getSQL(builder).toString();
     }
 
     @Override

h2/src/main/org/h2/table/MetaTable.java

@@ -1896,11 +1896,12 @@ public class MetaTable extends Table {
         case SESSION_STATE: {
             for (String name : session.getVariableNames()) {
                 Value v = session.getVariable(name);
+                StringBuilder builder = new StringBuilder().append("SET @").append(name).append(' ');
+                v.getSQL(builder);
                 add(rows,
                         // KEY
                         "@" + name,
-                        // SQL
-                        "SET @" + name + " " + v.getSQL()
+                        builder.toString()
                 );
             }
             for (Table table : session.getLocalTempTables()) {

h2/src/main/org/h2/table/TableLink.java

@@ -510,7 +510,8 @@ public class TableLink extends Table {
                             int i = 1;
                             for (Value v : params) {
                                 buff.appendExceptFirst(", ");
-                                buff.append(i++).append(": ").append(v.getSQL());
+                                buff.append(i++).append(": ");
+                                v.getSQL(buff.builder());
                             }
                             buff.append('}');
                         }

h2/src/main/org/h2/tools/Recover.java

@@ -991,7 +991,7 @@ public class Recover extends Tool implements DataHandler {
                                     append(" VALUES(");
                             for (int i = 0; i < row.getColumnCount(); i++) {
                                 buff.appendExceptFirst(", ");
-                                buff.append(row.getValue(i).getSQL());
+                                row.getValue(i).getSQL(buff.builder());
                             }
                             buff.append(");");
                             writer.println(buff.toString());

h2/src/main/org/h2/util/DateTimeUtils.java

@@ -1511,18 +1511,17 @@ public class DateTimeUtils {
     /**
      * Formats timestamp with time zone as string.
      *
+     * @param buff the target string builder
      * @param dateValue the year-month-day bit field
      * @param timeNanos nanoseconds since midnight
      * @param timeZoneOffsetMins the time zone offset in minutes
-     * @return formatted string
      */
-    public static String timestampTimeZoneToString(long dateValue, long timeNanos, short timeZoneOffsetMins) {
-        StringBuilder buff = new StringBuilder(ValueTimestampTimeZone.MAXIMUM_PRECISION);
+    public static void appendTimestampTimeZone(StringBuilder buff, long dateValue, long timeNanos,
+            short timeZoneOffsetMins) {
         appendDate(buff, dateValue);
         buff.append(' ');
         appendTime(buff, timeNanos);
         appendTimeZone(buff, timeZoneOffsetMins);
-        return buff.toString();
     }
 
     /**

h2/src/main/org/h2/util/IntervalUtils.java

@@ -383,8 +383,11 @@ public class IntervalUtils {
     }
 
     /**
-     * Formats interval as a string.
+     * Formats interval as a string and appends it to a specified string
+     * builder.
      *
+     * @param buff
+     *            string builder to append to
      * @param qualifier
      *            qualifier of the interval
      * @param negative
@@ -393,12 +396,11 @@ public class IntervalUtils {
      *            the value of leading field
      * @param remaining
      *            the value of all remaining fields
-     * @return string representation of the specified interval
+     * @return the specified string builder
      */
-    public static String intervalToString(IntervalQualifier qualifier, boolean negative, long leading, long remaining)
-    {
-        StringBuilder buff = new StringBuilder().append("INTERVAL ");
-        buff.append('\'');
+    public static StringBuilder appendInterval(StringBuilder buff, IntervalQualifier qualifier, boolean negative,
+            long leading, long remaining) {
+        buff.append("INTERVAL '");
         if (negative) {
             buff.append('-');
         }
@@ -453,8 +455,7 @@ public class IntervalUtils {
             appendSecondsWithNanos(buff, remaining);
             break;
         }
-        buff.append("' ").append(qualifier);
-        return buff.toString();
+        return buff.append("' ").append(qualifier);
     }
 
     private static void appendSecondsWithNanos(StringBuilder buff, long nanos) {

h2/src/main/org/h2/value/Value.java

@@ -275,7 +275,18 @@ public abstract class Value {
      *
      * @return the SQL expression
      */
-    public abstract String getSQL();
+    public String getSQL() {
+        return getSQL(new StringBuilder()).toString();
+    }
+
+    /**
+     * Appends the SQL expression for this value to the specified builder.
+     *
+     * @param builder
+     *            string builder
+     * @return the specified string builder
+     */
+    public abstract StringBuilder getSQL(StringBuilder builder);
 
     /**
      * Get the value type.

h2/src/main/org/h2/value/ValueArray.java

@@ -155,16 +155,19 @@ public class ValueArray extends Value {
     }
 
     @Override
-    public String getSQL() {
-        StatementBuilder buff = new StatementBuilder("(");
-        for (Value v : values) {
-            buff.appendExceptFirst(", ");
-            buff.append(v.getSQL());
+    public StringBuilder getSQL(StringBuilder builder) {
+        builder.append('(');
+        int length = values.length;
+        for (int i = 0; i < length; i++) {
+            if (i > 0) {
+                builder.append(", ");
+            }
+            values[i].getSQL(builder);
         }
-        if (values.length == 1) {
-            buff.append(',');
+        if (length == 1) {
+            builder.append(',');
         }
-        return buff.append(')').toString();
+        return builder.append(')');
     }
 
     @Override

h2/src/main/org/h2/value/ValueBoolean.java

@@ -50,6 +50,11 @@ public class ValueBoolean extends Value {
         return getString();
     }
 
+    @Override
+    public StringBuilder getSQL(StringBuilder builder) {
+        return builder.append(getString());
+    }
+
     @Override
     public String getString() {
         return value ? "TRUE" : "FALSE";

h2/src/main/org/h2/value/ValueByte.java

@@ -89,7 +89,12 @@ public class ValueByte extends Value {
 
     @Override
     public String getSQL() {
-        return getString();
+        return Integer.toString(value);
+    }
+
+    @Override
+    public StringBuilder getSQL(StringBuilder builder) {
+        return builder.append(value);
     }
 
     @Override

h2/src/main/org/h2/value/ValueBytes.java

@@ -79,8 +79,8 @@ public class ValueBytes extends Value {
     }
 
     @Override
-    public String getSQL() {
-        return "X'" + StringUtils.convertBytesToHex(getBytesNoCopy()) + "'";
+    public StringBuilder getSQL(StringBuilder builder) {
+        return builder.append("X'").append(StringUtils.convertBytesToHex(getBytesNoCopy())).append('\'');
     }
 
     @Override

h2/src/main/org/h2/value/ValueDate.java

@@ -98,8 +98,10 @@ public class ValueDate extends Value {
     }
 
     @Override
-    public String getSQL() {
-        return "DATE '" + getString() + "'";
+    public StringBuilder getSQL(StringBuilder builder) {
+        builder.append("DATE '");
+        DateTimeUtils.appendDate(builder, dateValue);
+        return builder.append('\'');
     }
 
     @Override

h2/src/main/org/h2/value/ValueDecimal.java

@@ -121,6 +121,11 @@ public class ValueDecimal extends Value {
         return getString();
     }
 
+    @Override
+    public StringBuilder getSQL(StringBuilder builder) {
+        return builder.append(getString());
+    }
+
     @Override
     public int getType() {
         return Value.DECIMAL;

h2/src/main/org/h2/value/ValueDouble.java

@@ -103,6 +103,20 @@ public class ValueDouble extends Value {
         return getString();
     }
 
+    @Override
+    public StringBuilder getSQL(StringBuilder builder) {
+        if (value == Double.POSITIVE_INFINITY) {
+            builder.append("POWER(0, -1)");
+        } else if (value == Double.NEGATIVE_INFINITY) {
+            builder.append("(-POWER(0, -1))");
+        } else if (Double.isNaN(value)) {
+            builder.append("SQRT(-1)");
+        } else {
+            builder.append(value);
+        }
+        return builder;
+    }
+
     @Override
     public int getType() {
         return Value.DOUBLE;

h2/src/main/org/h2/value/ValueEnumBase.java

@@ -98,6 +98,11 @@ public class ValueEnumBase extends Value {
         return StringUtils.quoteStringSQL(label);
     }
 
+    @Override
+    public StringBuilder getSQL(StringBuilder builder) {
+        return builder.append(StringUtils.quoteStringSQL(label));
+    }
+
     @Override
     public String getString() {
         return label;

h2/src/main/org/h2/value/ValueFloat.java

@@ -98,10 +98,23 @@ public class ValueFloat extends Value {
         } else if (value == Float.NEGATIVE_INFINITY) {
             return "(-POWER(0, -1))";
         } else if (Float.isNaN(value)) {
-            // NaN
             return "SQRT(-1)";
         }
-        return getString();
+        return Float.toString(value);
+    }
+
+    @Override
+    public StringBuilder getSQL(StringBuilder builder) {
+        if (value == Float.POSITIVE_INFINITY) {
+            builder.append("POWER(0, -1)");
+        } else if (value == Float.NEGATIVE_INFINITY) {
+            builder.append("(-POWER(0, -1))");
+        } else if (Float.isNaN(value)) {
+            builder.append("SQRT(-1)");
+        } else {
+            builder.append(value);
+        }
+        return builder;
     }
 
     @Override

h2/src/main/org/h2/value/ValueGeometry.java

@@ -268,9 +268,9 @@ public class ValueGeometry extends Value {
     }
 
     @Override
-    public String getSQL() {
+    public StringBuilder getSQL(StringBuilder builder) {
         // Using bytes is faster than converting to EWKT.
-        return "X'" + StringUtils.convertBytesToHex(getBytesNoCopy()) + "'::Geometry";
+        return builder.append("X'").append(StringUtils.convertBytesToHex(getBytesNoCopy())).append("'::Geometry");
     }
 
     @Override

h2/src/main/org/h2/value/ValueInt.java

@@ -122,7 +122,12 @@ public class ValueInt extends Value {
 
     @Override
     public String getSQL() {
-        return getString();
+        return Integer.toString(value);
+    }
+
+    @Override
+    public StringBuilder getSQL(StringBuilder builder) {
+        return builder.append(value);
     }
 
     @Override

h2/src/main/org/h2/value/ValueInterval.java

@@ -138,8 +138,8 @@ public class ValueInterval extends Value {
     }
 
     @Override
-    public String getSQL() {
-        return getString();
+    public StringBuilder getSQL(StringBuilder builder) {
+        return IntervalUtils.appendInterval(builder, getQualifier(), negative, leading, remaining);
     }
 
     @Override
@@ -211,7 +211,8 @@ public class ValueInterval extends Value {
 
     @Override
     public String getString() {
-        return IntervalUtils.intervalToString(getQualifier(), negative, leading, remaining);
+        return IntervalUtils.appendInterval(new StringBuilder(), getQualifier(), negative, leading, remaining)
+                .toString();
     }
 
     @Override

h2/src/main/org/h2/value/ValueLob.java

@@ -571,14 +571,20 @@ public class ValueLob extends Value {
 
     @Override
     public String getSQL() {
-        String s;
         if (valueType == Value.CLOB) {
-            s = getString();
-            return StringUtils.quoteStringSQL(s);
+            return StringUtils.quoteStringSQL(getString());
         }
-        byte[] buff = getBytes();
-        s = StringUtils.convertBytesToHex(buff);
-        return "X'" + s + "'";
+        return "X'" + StringUtils.convertBytesToHex(getBytes()) + '\'';
+    }
+
+    @Override
+    public StringBuilder getSQL(StringBuilder builder) {
+        if (valueType == Value.CLOB) {
+            builder.append(StringUtils.quoteStringSQL(getString()));
+        } else {
+            builder.append("X'").append(StringUtils.convertBytesToHex(getBytes())).append('\'');
+        }
+        return builder;
     }
 
     @Override

h2/src/main/org/h2/value/ValueLobDb.java

@@ -462,14 +462,20 @@ public class ValueLobDb extends Value {
 
     @Override
     public String getSQL() {
-        String s;
         if (valueType == Value.CLOB) {
-            s = getString();
-            return StringUtils.quoteStringSQL(s);
+            return StringUtils.quoteStringSQL(getString());
         }
-        byte[] buff = getBytes();
-        s = StringUtils.convertBytesToHex(buff);
-        return "X'" + s + "'";
+        return "X'" + StringUtils.convertBytesToHex(getBytes()) + '\'';
+    }
+
+    @Override
+    public StringBuilder getSQL(StringBuilder builder) {
+        if (valueType == Value.CLOB) {
+            builder.append(StringUtils.quoteStringSQL(getString()));
+        } else {
+            builder.append("X'").append(StringUtils.convertBytesToHex(getBytes())).append('\'');
+        }
+        return builder;
     }
 
     @Override

h2/src/main/org/h2/value/ValueLong.java

@@ -147,7 +147,12 @@ public class ValueLong extends Value {
 
     @Override
     public String getSQL() {
-        return getString();
+        return Long.toString(value);
+    }
+
+    @Override
+    public StringBuilder getSQL(StringBuilder builder) {
+        return builder.append(value);
     }
 
     @Override

h2/src/main/org/h2/value/ValueNull.java

@@ -53,6 +53,11 @@ public class ValueNull extends Value {
         return "NULL";
     }
 
+    @Override
+    public StringBuilder getSQL(StringBuilder builder) {
+        return builder.append("NULL");
+    }
+
     @Override
     public int getType() {
         return Value.NULL;

h2/src/main/org/h2/value/ValueResultSet.java

@@ -170,6 +170,11 @@ public class ValueResultSet extends Value {
         return "";
     }
 
+    @Override
+    public StringBuilder getSQL(StringBuilder builder) {
+        return builder;
+    }
+
     @Override
     public Value convertPrecision(long precision, boolean force) {
         if (!force) {

h2/src/main/org/h2/value/ValueShort.java

@@ -89,7 +89,12 @@ public class ValueShort extends Value {
 
     @Override
     public String getSQL() {
-        return getString();
+        return Integer.toString(value);
+    }
+
+    @Override
+    public StringBuilder getSQL(StringBuilder builder) {
+        return builder.append(value);
     }
 
     @Override

h2/src/main/org/h2/value/ValueString.java

@@ -38,6 +38,11 @@ public class ValueString extends Value {
         return StringUtils.quoteStringSQL(value);
     }
 
+    @Override
+    public StringBuilder getSQL(StringBuilder builder) {
+        return builder.append(StringUtils.quoteStringSQL(value));
+    }
+
     @Override
     public boolean equals(Object other) {
         return other instanceof ValueString

h2/src/main/org/h2/value/ValueTime.java

@@ -138,8 +138,10 @@ public class ValueTime extends Value {
     }
 
     @Override
-    public String getSQL() {
-        return "TIME '" + getString() + "'";
+    public StringBuilder getSQL(StringBuilder builder) {
+        builder.append("TIME '");
+        DateTimeUtils.appendTime(builder, nanos);
+        return builder.append('\'');
     }
 
     @Override

h2/src/main/org/h2/value/ValueTimestamp.java

@@ -188,8 +188,12 @@ public class ValueTimestamp extends Value {
     }
 
     @Override
-    public String getSQL() {
-        return "TIMESTAMP '" + getString() + "'";
+    public StringBuilder getSQL(StringBuilder builder) {
+        builder.append("TIMESTAMP '");
+        DateTimeUtils.appendDate(builder, dateValue);
+        builder.append(' ');
+        DateTimeUtils.appendTime(builder, timeNanos);
+        return builder.append('\'');
     }
 
     @Override

h2/src/main/org/h2/value/ValueTimestampTimeZone.java

@@ -175,12 +175,16 @@ public class ValueTimestampTimeZone extends Value {
 
     @Override
     public String getString() {
-        return DateTimeUtils.timestampTimeZoneToString(dateValue, timeNanos, timeZoneOffsetMins);
+        StringBuilder builder = new StringBuilder(ValueTimestampTimeZone.MAXIMUM_PRECISION);
+        DateTimeUtils.appendTimestampTimeZone(builder, dateValue, timeNanos, timeZoneOffsetMins);
+        return builder.toString();
     }
 
     @Override
-    public String getSQL() {
-        return "TIMESTAMP WITH TIME ZONE '" + getString() + "'";
+    public StringBuilder getSQL(StringBuilder builder) {
+        builder.append("TIMESTAMP WITH TIME ZONE '");
+        DateTimeUtils.appendTimestampTimeZone(builder, dateValue, timeNanos, timeZoneOffsetMins);
+        return builder.append('\'');
     }
 
     @Override

h2/src/main/org/h2/value/ValueUuid.java

@@ -126,8 +126,9 @@ public class ValueUuid extends Value {
     }
 
     @Override
-    public String getSQL() {
-        return StringUtils.quoteStringSQL(getString());
+    public StringBuilder getSQL(StringBuilder builder) {
+        builder.append('\'');
+        return addString(builder).append('\'');
     }
 
     @Override
@@ -149,17 +150,20 @@ public class ValueUuid extends Value {
 
     @Override
     public String getString() {
-        StringBuilder buff = new StringBuilder(36);
-        appendHex(buff, high >> 32, 4);
-        buff.append('-');
-        appendHex(buff, high >> 16, 2);
-        buff.append('-');
-        appendHex(buff, high, 2);
-        buff.append('-');
-        appendHex(buff, low >> 48, 2);
-        buff.append('-');
-        appendHex(buff, low, 6);
-        return buff.toString();
+        return addString(new StringBuilder(36)).toString();
+    }
+
+    private StringBuilder addString(StringBuilder builder) {
+        appendHex(builder, high >> 32, 4);
+        builder.append('-');
+        appendHex(builder, high >> 16, 2);
+        builder.append('-');
+        appendHex(builder, high, 2);
+        builder.append('-');
+        appendHex(builder, low >> 48, 2);
+        builder.append('-');
+        appendHex(builder, low, 6);
+        return builder;
     }
 
     @Override

h2/src/test/org/h2/test/jdbc/TestCustomDataTypesHandler.java

@@ -341,6 +341,11 @@ public class TestCustomDataTypesHandler extends TestDb {
             return val.toString();
         }
 
+        @Override
+        public StringBuilder getSQL(StringBuilder builder) {
+            return builder.append(val.toString());
+        }
+
         @Override
         public int getType() {
             return TestOnlyCustomDataTypesHandler.COMPLEX_DATA_TYPE_ID;