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-rw-r--r--src/time-extension-functions.cc87
1 files changed, 86 insertions, 1 deletions
diff --git a/src/time-extension-functions.cc b/src/time-extension-functions.cc
index b92ec2a..b6567fd 100644
--- a/src/time-extension-functions.cc
+++ b/src/time-extension-functions.cc
@@ -34,10 +34,12 @@
#include <string.h>
+#include "base/attr_line.builder.hh"
#include "base/date_time_scanner.hh"
#include "base/humanize.time.hh"
-#include "base/lrucache.hpp"
#include "config.h"
+#include "date/tz.h"
+#include "ptimec.hh"
#include "relative_time.hh"
#include "sql_util.hh"
#include "vtab_module.hh"
@@ -186,6 +188,73 @@ sql_humanize_duration(double value)
return humanize::time::duration::from_tv(tv).to_string();
}
+static nonstd::optional<std::string>
+sql_timezone(std::string tz_str, string_fragment ts_str)
+{
+ thread_local date_time_scanner dts;
+ struct timeval tv;
+ exttm tm1;
+
+ auto scan_end
+ = dts.scan(ts_str.data(), ts_str.length(), nullptr, &tm1, tv, false);
+ if (scan_end == nullptr) {
+ auto um = lnav::console::user_message::error(
+ attr_line_t("unrecognized timestamp: ").append(ts_str));
+ throw um;
+ }
+ size_t matched_size = scan_end - ts_str.data();
+ auto ts_remaining = ts_str.substr(matched_size);
+ if (!ts_remaining.empty()) {
+ auto um
+ = lnav::console::user_message::error(
+ attr_line_t("invalid timestamp: ").append(ts_str))
+ .with_reason(attr_line_t("the leading part of the timestamp "
+ "was matched, however, the trailing "
+ "text ")
+ .append_quoted(ts_remaining)
+ .append(" was not"))
+ .with_note(attr_line_t("input matched time format ")
+ .append_quoted(
+ PTIMEC_FORMATS[dts.dts_fmt_lock].pf_fmt))
+ .with_help("fix the timestamp or remove the trailing text");
+
+ auto ts_attr = attr_line_t().append(ts_str);
+ attr_line_builder alb(ts_attr);
+
+ alb.append("\n").append(matched_size, ' ');
+ {
+ auto attr_guard = alb.with_attr(VC_ROLE.value(role_t::VCR_COMMENT));
+
+ alb.append("^");
+ if (ts_remaining.length() > 1) {
+ if (ts_remaining.length() > 2) {
+ alb.append(ts_remaining.length() - 2, '-');
+ }
+ alb.append("^");
+ }
+ alb.append(" unrecognized input");
+ }
+ um.with_note(ts_attr);
+ throw um;
+ }
+
+ thread_local std::string last_tz;
+ thread_local const date::time_zone* tz;
+
+ if (tz_str != last_tz) {
+ tz = date::locate_zone(tz_str);
+ }
+
+ auto stime = std::chrono::time_point_cast<std::chrono::microseconds>(
+ std::chrono::system_clock::from_time_t(tv.tv_sec));
+ stime += std::chrono::microseconds{tv.tv_usec};
+ auto ztime = date::make_zoned(tz, stime);
+
+ auto retval = date::format("%FT%T%z", ztime);
+
+ return retval;
+}
+
int
time_extension_functions(struct FuncDef** basic_funcs,
struct FuncDefAgg** agg_funcs)
@@ -198,6 +267,7 @@ time_extension_functions(struct FuncDef** basic_funcs,
"timestamp falls in. "
"If the time falls outside of the slice, NULL is returned.")
.sql_function()
+ .with_prql_path({"time", "slice"})
.with_parameter(
{"time", "The timestamp to get the time slice for."})
.with_parameter({"slice", "The size of the time slices"})
@@ -224,6 +294,7 @@ time_extension_functions(struct FuncDef** basic_funcs,
"timediff",
"Compute the difference between two timestamps in seconds")
.sql_function()
+ .with_prql_path({"time", "diff"})
.with_parameter({"time1", "The first timestamp"})
.with_parameter(
{"time2", "The timestamp to subtract from the first"})
@@ -245,6 +316,7 @@ time_extension_functions(struct FuncDef** basic_funcs,
"Format the given seconds value as an abbreviated "
"duration string")
.sql_function()
+ .with_prql_path({"humanize", "duration"})
.with_parameter({"secs", "The duration in seconds"})
.with_tags({"datetime", "string"})
.with_example({
@@ -256,6 +328,19 @@ time_extension_functions(struct FuncDef** basic_funcs,
"SELECT humanize_duration(1.5)",
})),
+ sqlite_func_adapter<decltype(&sql_timezone), sql_timezone>::builder(
+ help_text("timezone", "Convert a timestamp to the given timezone")
+ .sql_function()
+ .with_prql_path({"time", "to_zone"})
+ .with_parameter({"tz", "The target timezone"})
+ .with_parameter({"ts", "The source timestamp"})
+ .with_tags({"datetime", "string"})
+ .with_example({
+ "To convert a time to America/Los_Angeles",
+ "SELECT timezone('America/Los_Angeles', "
+ "'2022-03-02T10:00')",
+ })),
+
{nullptr},
};