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|
const std = @import("std");
const c = @cImport({
@cInclude("duckdb.h");
});
const DuckdbType = enum {
BOOLEAN,
TINYINT,
SMALLINT,
INTEGER,
BIGINT,
UTINYINT,
USMALLINT,
UINTEGER,
UBIGINT,
FLOAT,
DOUBLE,
TIMESTAMP,
DATE,
TIME,
INTERVAL,
HUGEINT,
UHUGEINT,
VARCHAR,
BLOB,
TIMESTAMP_S,
TIMESTAMP_MS,
TIMESTAMP_NS,
UUID,
TIME_TZ,
TIMESTAMP_TZ,
};
pub const Column = union(DuckdbType) {
BOOLEAN: [*]bool,
TINYINT: [*]i8,
SMALLINT: [*]i16,
INTEGER: [*]i32,
BIGINT: [*]i64,
UTINYINT: [*]u8,
USMALLINT: [*]u16,
UINTEGER: [*]u32,
UBIGINT: [*]u64,
FLOAT: [*]f32,
DOUBLE: [*]f64,
TIMESTAMP: [*]c.duckdb_timestamp,
DATE: [*]c.duckdb_date,
TIME: [*]c.duckdb_time,
INTERVAL: [*]c.duckdb_interval,
HUGEINT: [*]c.duckdb_hugeint,
UHUGEINT: [*]c.duckdb_uhugeint,
VARCHAR: [*]c.duckdb_string_t,
BLOB: [*]c.duckdb_string_t,
TIMESTAMP_S: [*]c.duckdb_timestamp,
TIMESTAMP_MS: [*]c.duckdb_timestamp,
TIMESTAMP_NS: [*]c.duckdb_timestamp,
UUID: [*]c.duckdb_hugeint,
TIME_TZ: [*]c.duckdb_time_tz,
TIMESTAMP_TZ: [*]c.duckdb_timestamp,
const Self = @This();
pub fn fromType(column_type: c.DUCKDB_TYPE, column: *anyopaque) Column {
return switch (column_type) {
c.DUCKDB_TYPE_BOOLEAN => .{.BOOLEAN = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_TINYINT => .{.TINYINT = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_SMALLINT => .{.SMALLINT = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_INTEGER => .{.INTEGER = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_BIGINT => .{.BIGINT = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_UTINYINT => .{.UTINYINT = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_USMALLINT => .{.USMALLINT = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_UINTEGER => .{.UINTEGER = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_UBIGINT => .{.UBIGINT = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_FLOAT => .{.FLOAT = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_DOUBLE => .{.DOUBLE = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_VARCHAR => .{.VARCHAR = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_BLOB => .{.BLOB = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_TIMESTAMP => .{.TIMESTAMP = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_DATE => .{.DATE = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_TIME => .{.TIME = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_INTERVAL => .{.INTERVAL = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_HUGEINT => .{.HUGEINT = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_UHUGEINT => .{.UHUGEINT = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_TIMESTAMP_S => .{.TIMESTAMP_S = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_TIMESTAMP_MS => .{.TIMESTAMP_MS = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_TIMESTAMP_NS => .{.TIMESTAMP_NS = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_UUID => .{.UUID = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_TIME_TZ => .{.TIME_TZ = @alignCast(@ptrCast(column))},
c.DUCKDB_TYPE_TIMESTAMP_TZ => .{.TIMESTAMP_TZ = @alignCast(@ptrCast(column))},
else => unreachable,
};
}
pub fn getAs(self: Self, i: usize, T: anytype) !T{
const ti : std.builtin.Type = @typeInfo(T);
switch (self){
.BOOLEAN
=> |ptr| switch(ti) {
.Bool => return ptr[i],
.Int => return @intFromBool(ptr[i]),
else => return error.InvalidConversion,
},
.TINYINT
=> |ptr| switch(ti) {
.Int => return @intCast(ptr[i]),
.Float => return @floatFromInt(ptr[i]),
else => return error.InvalidConversion,
},
.SMALLINT
=> |ptr| switch(ti) {
.Int => return @intCast(ptr[i]),
.Float => return @floatFromInt(ptr[i]),
else => return error.InvalidConversion,
},
.INTEGER
=> |ptr| switch(ti) {
.Int => return @intCast(ptr[i]),
.Float => return @floatFromInt(ptr[i]),
else => return error.InvalidConversion,
},
.BIGINT
=> |ptr| switch(ti) {
.Int => return @intCast(ptr[i]),
.Float => return @floatFromInt(ptr[i]),
else => return error.InvalidConversion,
},
.UTINYINT
=> |ptr| switch(ti) {
.Int => return @intCast(ptr[i]),
.Float => return @floatFromInt(ptr[i]),
else => return error.InvalidConversion,
},
.USMALLINT
=> |ptr| switch(ti) {
.Int => return @intCast(ptr[i]),
.Float => return @floatFromInt(ptr[i]),
else => return error.InvalidConversion,
},
.UINTEGER
=> |ptr| switch(ti) {
.Int => return @intCast(ptr[i]),
.Float => return @floatFromInt(ptr[i]),
else => return error.InvalidConversion,
},
.UBIGINT
=> |ptr| switch(ti) {
.Int => return @intCast(ptr[i]),
.Float => return @floatFromInt(ptr[i]),
else => return error.InvalidConversion,
},
.FLOAT
=> |ptr| switch(ti) {
.Int => return @intFromFloat(ptr[i]),
.Float => return @floatCast(ptr[i]),
else => return error.InvalidConversion,
},
.DOUBLE
=> |ptr| switch(ti) {
.Int => return @intFromFloat(ptr[i]),
.Float => return @floatCast(ptr[i]),
else => return error.InvalidConversion,
},
.VARCHAR,
.BLOB
=> |ptr| switch(ti){
.Pointer => |p| switch (p.size) {
.Slice => {
if ( p.child == u8 ) {
var result: T = undefined;
if (c.duckdb_string_is_inlined(ptr[i])){
result = &ptr[i].value.inlined.inlined;
result.len = ptr[i].value.inlined.length;
return result;
} else {
result.len = ptr[i].value.pointer.length;
result.ptr = ptr[i].value.pointer.ptr;
return result;
}
} else {
@compileError("Invalid type for output data: "
++ @typeName(T));
}
},
else => return error.InvalidConversion,
},
else => return error.InvalidConversion,
},
.TIMESTAMP,
.DATE,
.TIME,
.INTERVAL,
.HUGEINT,
.UHUGEINT,
.TIMESTAMP_S,
.TIMESTAMP_MS,
.TIMESTAMP_NS,
.UUID,
.TIME_TZ,
.TIMESTAMP_TZ =>
return error.ConversionNotImplemented,
}
}
};
|
