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[#7518] Support parsing PostgreSQL interval literals

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This commit is contained in:
lukaseder 2019-01-21 11:06:26 +01:00
parent 4eb6ff4b05
commit 126c8b496e
1 changed files with 127 additions and 0 deletions
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127
jOOQ/src/main/java/org/jooq/impl/ParserImpl.java
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@ -6001,7 +6001,134 @@ final class ParserImpl implements Parser {
return null;
}
private static final Interval parsePostgresIntervalLiteralIf(ParserContext ctx) {
int position = ctx.position();
p:
if (parseIf(ctx, '\'')) {
parseIf(ctx, '@');
Number year = null;
Number month = null;
Number day = null;
Number hour = null;
Number minute = null;
Number second = null;
do {
boolean minus = parseIf(ctx, '-');
if (!minus)
parseIf(ctx, '+');
Number n = parseUnsignedNumericLiteralIf(ctx, minus ? Sign.MINUS : Sign.NONE);
if (n == null)
break p;
switch (ctx.character()) {
case 'D':
case 'd':
if (parseKeywordIf(ctx, "D") ||
parseKeywordIf(ctx, "DAY") ||
parseKeywordIf(ctx, "DAYS"))
if (day == null)
day = n;
else
throw ctx.exception("Day part already defined");
break;
case 'H':
case 'h':
if (parseKeywordIf(ctx, "H") ||
parseKeywordIf(ctx, "HOUR") ||
parseKeywordIf(ctx, "HOURS"))
if (hour == null)
hour = n;
else
throw ctx.exception("Hour part already defined");
break;
case 'M':
case 'm':
if (parseKeywordIf(ctx, "M") ||
parseKeywordIf(ctx, "MIN") ||
parseKeywordIf(ctx, "MINS") ||
parseKeywordIf(ctx, "MINUTE") ||
parseKeywordIf(ctx, "MINUTES"))
if (minute == null)
minute = n;
else
throw ctx.exception("Minute part already defined");
else if (parseKeywordIf(ctx, "MON") ||
parseKeywordIf(ctx, "MONS") ||
parseKeywordIf(ctx, "MONTH") ||
parseKeywordIf(ctx, "MONTHS"))
if (month == null)
month = n;
else
throw ctx.exception("Month part already defined");
break;
case 'S':
case 's':
if (parseKeywordIf(ctx, "S") ||
parseKeywordIf(ctx, "SEC") ||
parseKeywordIf(ctx, "SECS") ||
parseKeywordIf(ctx, "SECOND") ||
parseKeywordIf(ctx, "SECONDS"))
if (second == null)
second = n;
else
throw ctx.exception("Second part already defined");
break;
case 'Y':
case 'y':
if (parseKeywordIf(ctx, "Y") ||
parseKeywordIf(ctx, "YEAR") ||
parseKeywordIf(ctx, "YEARS"))
if (year == null)
year = n;
else
throw ctx.exception("Year part already defined");
break;
default:
break p;
}
}
while (!parseIf(ctx, '\''));
int months = (month == null ? 0 : month.intValue())
+ (year == null ? 0 : (int) (year.doubleValue() * 12));
double seconds = (month == null ? 0.0 : ((month.doubleValue() % 1.0) * 30 * 86400))
+ (day == null ? 0.0 : ((day.doubleValue() * 86400)))
+ (hour == null ? 0.0 : ((hour.doubleValue() * 3600)))
+ (minute == null ? 0.0 : ((minute.doubleValue() * 60)))
+ (second == null ? 0.0 : ((second.doubleValue())));
return new YearToSecond(
new YearToMonth(0, months),
new DayToSecond(0, 0, 0, (int) seconds, (int) ((seconds % 1.0) * 1000000000))
);
}
ctx.position(position);
return null;
}
private static final Interval parseIntervalLiteral(ParserContext ctx) {
Interval result = parsePostgresIntervalLiteralIf(ctx);
if (result != null)
return result;
String string = parseStringLiteral(ctx);
try {